ONYX ACCEPTANCE CORP
10-K, 1999-03-31
PERSONAL CREDIT INSTITUTIONS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                   FORM 10-K
 
(MARK ONE)
 
      [X]   ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
            SECURITIES EXCHANGE ACT OF 1934
 
                  FOR THE FISCAL YEAR ENDED DECEMBER 31, 1998
 
                                       OR
 
      [ ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
            SECURITIES EXCHANGE ACT OF 1934
 
           FOR THE TRANSITION PERIOD FROM __________ TO __________ .
 
                         COMMISSION FILE NUMBER: 28050
 
                            ------------------------
 
                          ONYX ACCEPTANCE CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                                            <C>
                   DELAWARE                                      33-0577635
       (STATE OR OTHER JURISDICTION OF                        (I.R.S. EMPLOYER
        INCORPORATION OR ORGANIZATION)                     IDENTIFICATION NUMBER)
</TABLE>
 
                          ONYX ACCEPTANCE CORPORATION
                      27051 TOWNE CENTRE DRIVE, SUITE 100
                            FOOTHILL RANCH, CA 92610
              (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) (ZIP CODE)
 
                                 (949) 465-3900
              (REGISTRANT'S TELEPHONE NUMBER INCLUDING AREA CODE)
 
        SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT: NONE
 
          SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT:
 
                         COMMON STOCK ($0.01 PAR VALUE)
 
     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  Yes [X]  No [ ]
 
     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendments to
this Form 10-K.  [ ]
 
     The number of shares outstanding of the Company's Common Stock as of the
closing of the market on March 16, 1999 was 6,171,034. The registrant does not
have different classes of Common Stock. Based on the closing sale price of
$6.625, the registrant's Common Stock as quoted on the Nasdaq National Market on
March 16, 1999, the aggregate market value of such stock held by non-affiliates
of the registrant was approximately $21,525,924 on that date.
 
                      DOCUMENTS INCORPORATED BY REFERENCE
 
     Portions of the registrant's Proxy Statement for the Annual Meeting of
Stockholders currently expected to be held on May 27, 1999, as filed with the
Commission pursuant to Regulation 14A, are incorporated by reference in Part III
of this Report.
 
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<PAGE>   2
 
                           ANNUAL REPORT ON FORM 10-K
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                        PAGE
                                                                        ----
<S>       <C>                                                           <C>
                                   PART I
Item 1.   Business....................................................    1
Item 2.   Properties..................................................   15
Item 3.   Litigation..................................................   15
Item 4.   Submission of Matters to a Vote of Security Holders.........   15
 
                                  PART II
Item 5.   Market for Registrant's Common Equity and Related
          Stockholders Matters --
          Price Range of Common Stock and Dividend Policy.............   15
Item 6.   Selected Financial Data.....................................   16
Item 7.   Management's Discussion and Analysis of Financial Condition
          and Results of Operations...................................   17
Item 7A.  Quantitative and Qualitative Disclosures about Market
          Risk........................................................   28
Item 8.   Financial Statements and Supplementary Data.................   28
Item 9.   Changes in and Disagreements With Accountants on Accounting
          and Financial Disclosure....................................   28
 
                                  PART III
Item 10.  Directors and Executive Officers of the Registrant..........   28
Item 11.  Executive Compensation......................................   29
Item 12.  Security Ownership of Certain Beneficial Owners and
          Management..................................................   29
Item 13.  Certain Relationships and Related Transactions..............   29
 
                                  PART IV
Item 14.  Exhibits, Financial Statement Schedules and Reports on Form
          8-K.........................................................   29
</TABLE>
 
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                                     PART I
 
FORWARD-LOOKING STATEMENTS
 
     When used throughout this Annual Report, the words "believes",
"anticipates" and "expects" and similar expressions are intended to identify
forward-looking statements. Such statements are subject to the many risks and
uncertainties which affect the Company's business, and actual results could
differ materially from those projected and forecasted. These uncertainties,
which include competition within the automobile finance industry, the effect of
economic conditions, and the availability of capital to finance planned growth,
are described but are not limited to those disclosed in this Annual Report.
These and other factors which could cause actual results to differ materially
from those in the forward-looking statements are discussed under the heading
"Risk Factors". Given these uncertainties, readers are cautioned not to place
undue reliance on such statements. The Company also undertakes no obligation to
publicly release the result of any revisions to these forward-looking
statements. The Company also undertakes no obligation to publicly release the
result of any revisions to these forward-looking statements that may be made to
reflect any future events or circumstances.
 
ITEM 1. BUSINESS
 
GENERAL
 
     Onyx Acceptance Corporation ("Onyx" or the "Company") is a specialized
consumer finance company engaged in the purchase, securitization and servicing
of motor vehicle retail installment contracts originated by franchised and
select independent automobile dealerships and to a lesser extent the origination
or purchase of motor vehicle loans on a direct basis through its subsidiaries,
to consumers throughout the United States (collectively the "Contracts"). The
Company focuses its efforts on acquiring Contracts collateralized by late model
used and, to a lesser extent, new motor vehicles, entered into with purchasers
whom the Company believes have a favorable credit profile. Since commencing the
purchase, origination and servicing of Contracts in February 1994, the Company
has purchased or originated in excess of $2.2 billion in Contracts from
approximately 5,400 dealerships and has expanded its operations from a single
office in Orange County, California to 14 auto finance centers (the "Auto
Finance Centers") serving many regions of the United States.
 
BACKGROUND
 
     The Company was founded in August 1993 by a team of executives with
extensive automobile finance experience including responsibility for the major
aspects of near-prime auto lending, including underwriting, servicing,
information systems implementation, interest rate management, securitizations
and dealer center management.
 
     The Company was initially capitalized by three venture capital firms in
November 1993. In February 1994, the Company began building its portfolio of
near-prime quality Contracts collateralized by new and used motor vehicles
pursuant to its managed growth strategy. Within its first five years of
operations, the Company expanded to 14 Auto Finance Centers, purchased or
originated over $2.2 billion in Contracts and completed 14 securitizations.
 
MARKET AND COMPETITION
 
     The Company operates in a highly competitive market. The automobile finance
market has historically been serviced by a variety of financial entities
including the captive finance affiliates of major automotive manufacturers,
banks, savings associations, independent finance companies, credit unions and
leasing companies. Several of these competitors have greater financial resources
than the Company. Many of these competitors also have long-standing
relationships with automobile dealerships and may offer dealerships or their
customers other forms of financing or services not provided by the Company.
However, in the past two years, and during the 3rd and 4th quarters of 1998 in
particular, many of these auto finance companies have experienced significant
liquidity and performance challenges.
 
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<PAGE>   4
 
     The Company competes for the purchase of Contracts which meet its
underwriting criteria on the basis of emphasizing strong relationships with its
dealership customer base through its local presence. The Company supports its
dealership customer base with an operation that is open seven days a week and
has the ability to finalize purchases of Contracts on weekends. The Company
believes that its strong personal relationships with and its level of service to
the dealerships in its customer base provide a competitive advantage to the
Company.
 
BUSINESS STRATEGY
 
     The Company's principal objective remains to become one of the leading
sources of near-prime auto lending in the United States by leveraging the
experience of its senior management team in this industry. The Company seeks to
attain and increase profitability through the implementation of the following
strategies:
 
          Targeted Market and Product Focus. The Company targets the near-prime
     auto lending market because it believes that near-prime lending produces
     greater origination and operating efficiency than does sub-prime lending.
     The Company focuses on late model used rather than new vehicles, as
     management believes the risk of loss on used vehicles is lower due to lower
     depreciation rates, while interest rates are typically higher. In addition,
     the Company believes that the late model used motor vehicle finance market
     is growing at a faster rate than is the finance market for new motor
     vehicles.
 
          Localized Dealership Service. The Company provides a high level of
     service to its dealership base by underwriting and purchasing Contracts and
     marketing to and servicing dealerships on a local level through its Auto
     Finance Centers. The Company strategically locates its Auto Finance Centers
     in geographic areas of high dealership concentration to facilitate personal
     service in the local markets, including consistent buying practices,
     operations open seven days a week, competitive rates, a dedicated customer
     service staff, fast turnaround time and systems designed to expedite the
     processing of Contract applications. This personal service is provided by a
     team of experienced account managers (the "Account Managers") with an
     established reputation for responsiveness and integrity who call on
     dealerships in a consistent and professional manner. The Company believes
     that its local presence and service provide the opportunity to build strong
     and lasting relationships with dealerships.
 
          Expansion of Dealership Customer Base. The Company establishes active
     relationships with a substantial percentage of franchised dealerships in
     the regions in which it does business through its 14 existing Auto Finance
     Centers. The Company expects to establish additional relationships as it
     expands into other states during 1999.
 
          Maintenance of Underwriting Standards and Portfolio Performance. The
     Company has developed an underwriting process that is designed to achieve
     attractive yields while minimizing delinquencies and losses. Based on its
     belief that a credit scoring system is a less effective means of assessing
     credit risk, especially in the near-prime sector, the Company employs
     experienced credit managers (the "Credit Managers") in the local Auto
     Finance Centers to purchase Contracts satisfying the underwriting criteria
     developed by the Company. The Company's Credit Managers and Account
     Managers are compensated as a team and their compensation relies, in part,
     upon the quality of underwriting of the Contracts they approve. The Company
     is one of only a few that has developed a credit review process where a
     post funding audit is performed on most originations. This audit provides
     an invaluable tool to provide feedback to enhance the underwriting process.
     To further monitor the integrity of the underwriting process, management
     regularly tracks the delinquency and loss rates of Contracts purchased by
     each Credit Manager and Account Manager team and reviews Contracts against
     the Company's underwriting standards shortly after they have been
     purchased.
 
          Technology-Supported Operational Controls. The Company has developed
     and instituted control and review systems that enable it to monitor both
     the operations of the Company and the performance of the servicing
     portfolio. These systems allow senior management to monitor Contract
     production, yields and performance on a real-time basis. The Company
     believes that its information systems not only enhance its internal
     controls but also allow it to significantly expand its Servicing Portfolio
     without a corresponding increase in its labor costs.
 
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<PAGE>   5
 
          Liquidity Through Warehousing and Securitizations. The Company's
     strategy is to complete securitizations on a regular basis and to use
     warehousing credit facilities, to fund Contracts prior to securitization.
     To fund dealer participation and finance daily operations, the Company
     relies to a significant extent on credit facilities that are collateralized
     by the Company's retained interest in securitized assets ("RISA"). The
     Company also utilizes both securitization and hedging strategies to
     leverage its capital efficiently and substantially reduce its interest rate
     risk.
 
OPERATIONS
 
     Dealership Marketing and Service. As of December 31, 1998, the Company has
14 Auto Finance Centers located through out the United States and had
approximately 5,400 active dealerships in its dealership customer base located
in these regions. Of these dealerships, approximately 86% are franchised and
approximately 14% are independent automobile dealerships. The Company believes
that franchised and select independent automobile dealerships are most likely to
provide the Company with Contracts that meet the Company's underwriting
standards.
 
     The Company has significantly expanded its customer base of automobile
dealerships, and has substantially increased both monthly Contract purchases and
originations and the size of its servicing portfolio. The following table sets
forth information about the Company's Contracts and Auto Finance Centers as of
the dates indicated:
 
<TABLE>
<CAPTION>
                                                                   FOR THE YEARS ENDED
                                                ---------------------------------------------------------
                                                DECEMBER 31,   DECEMBER 31,   DECEMBER 31,   DECEMBER 31,
                                                    1995           1996           1997           1998
                                                ------------   ------------   ------------   ------------
                                                                 (DOLLARS IN THOUSANDS)
<S>                                             <C>            <C>            <C>            <C>
Number of auto finance centers................           5              9             10              14
Number of contracts purchased.................      16,571         26,244         50,214          86,150
Dollar volume of contracts collateralized by
  new vehicles................................    $ 39,706       $ 68,654       $129,178      $  186,654
Dollar volume of contracts collateralized by
  used vehicles...............................    $159,691       $251,186       $476,727      $  851,881
Dollar volume of contracts....................    $199,397       $319,840       $605,905      $1,038,535
Average dollar volume of contracts per auto
  finance center..............................    $ 39,879       $ 35,538       $ 60,591      $   74,181
Number of active dealerships..................         769          1,471          2,846           5,401
Servicing portfolio...........................    $218,207       $400,665       $757,277      $1,345,961
</TABLE>
 
     The Company's growth objectives over the next 12 months are to open
additional Auto Finance Centers in metropolitan areas within the United States
and to further develop relationships with existing franchised dealerships in the
states where the Company is currently doing business.
 
     The Account Managers work from the Auto Finance Centers to solicit, enroll
and educate new dealerships as well as to maintain relationships with the
Company's existing dealership customer base. Each Account Manager visits
dealership finance managers at each targeted dealership in his or her territory
and presents information about the Company's dealership services. The Company's
services include service hours seven days a week and the ability to rapidly
respond to credit applications. The Account Managers educate the dealership
finance managers about the Company's underwriting philosophy, including its
preference for near-prime quality Contracts collateralized by late model used
motor vehicles and its practice of using experienced Credit Managers (rather
than sole reliance upon computerized scoring systems) to review applications.
 
     The Account Managers also advise the dealership finance managers regarding
the Company's commitment to serve a broad scope of qualified borrowers through
its three near-prime auto lending programs: the "Premier", the "Preferred," and
the "Standard" Programs. The Premier Program allows the Company to market lower
interest rates in order to capture customers of superior credit quality. The
Preferred Program allows the Company to offer Contracts at higher interest rates
to borrowers with proven credit quality. The
 
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<PAGE>   6
 
Standard Program allows the Company to assist qualified borrowers, who may have
experienced previous credit problems or have not yet established a significant
credit history, at interest rates higher than the Company's other programs.
 
     The Company enters into a non-exclusive dealership agreement containing
certain representations and warranties by the dealership about the Contracts.
After this relationship is established, the Account Managers continue to
actively monitor the relationship to meet the Company's objectives with respect
to the volume of applications satisfying the Company's underwriting standards.
Due to the non-exclusive nature of the Company's relationships with dealerships,
the dealerships retain discretion to determine whether to solicit financing from
the Company for a customer seeking to finance a vehicle purchase. The Account
Managers regularly telephone and visit finance managers to reinforce to them the
Company's objectives and to answer any questions they may have. To increase the
effectiveness of these contacts, the Account Managers can obtain from the
Company's management information systems real-time information listing by
dealership the number of applications submitted, the Company's response and the
reasons why a particular application was rejected. The Company believes that the
personal relationships its Account Managers, Credit Managers and Auto Finance
Center Managers establish with the finance managers at the dealerships are a
significant factor in creating and maintaining productive relationships with its
dealership customer base.
 
UNDERWRITING AND PURCHASING OF CONTRACTS
 
     The Company's underwriting standards are applied by experienced Credit
Managers with a personal, hands-on analysis of the creditworthiness of each
applicant, rather than sole reliance upon credit scoring systems used by several
of the Company's competitors. The Company believes that credit-scoring systems
may approve applicants who are in fact not creditworthy while denying credit to
others whom may have acceptable credit risk for the interest rate being charged.
In addition, the Company believes that it can enhance the relationship with its
dealership and consumer customer base by having its Credit Managers utilize a
rules/exception based credit/audit system to personally review each application
and communicate to the submitting dealership or, in the case of contracts
directly originated or purchased, communicate to the consumer or the Company's
authorized loan processor, the results of the review, including the reasons why
a particular application may have been declined. This practice encourages the
dealership finance managers to submit Contracts meeting the Company's
underwriting standards, thereby increasing the Company's operating efficiency.
In order to ensure consistent application of its underwriting standards as its
volume of Contract purchases increases, the Company has adopted a formal
internal training program for new and existing Account Managers and Credit
Managers.
 
     The underwriting process begins when an application is telecopied by a
dealership or, in the case of Contracts directly originated or purchased, when
the application received from the obligor via the internet, mail or telephone,
to a central toll-free number, at the corporate headquarters where it is input
into the Company's front-end application processing system. Each application is
evaluated by a Credit Manager in the local Auto Finance Center, or at the
Company's authorized processor's office in the case of Contracts directly
originated or purchased, using uniform underwriting standards developed by the
Company. These underwriting standards are intended to assess the applicant's
ability to timely repay all amounts due under the Contract and the adequacy of
the financed vehicle as collateral. To evaluate credit applications, the Credit
Manager reviews, among other things, on-line information, including reports of
credit reporting agencies, nationally recognized vehicle valuation services, and
ownership of real estate listed on an application. The Company's wide area
network permits a Credit Manager in any Auto Finance Center, or the corporate
headquarters, to access an application on a real-time basis. This computer
network enables senior management to efficiently review and approve Contracts
requiring approval and permits the Company to seamlessly shift underwriting work
among any of the Auto Finance Centers to increase operating efficiency. Finally,
the Company's computer network permits real-time review by senior management of
operating results sorted by any number of variables, including by Credit
Manager, Auto Finance Center, or auto dealership.
 
     The funds advanced by the Company to purchase a Contract generally do not
exceed: (i) for a new financed vehicle, the dealer's invoice plus taxes, title
and license fees, any extended warranty and credit insurance; or (ii) for a used
financed vehicle, the wholesale value assigned by a nationally recognized
vehicle
 
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<PAGE>   7
 
valuation service value guide, plus taxes, title and license fees, any extended
warranty and credit insurance. However, the actual amount advanced for a
Contract may be limited by a number of factors, including the length of the
Contract term, the make, model and year of the financed vehicle and the
creditworthiness of the obligor. These adjustments are made to insure that the
financed vehicle constitutes adequate collateral to secure the Contract.
Contracts purchased or originated in 1998 had an average loan to value ratio at
purchase or origination of 104% which the Company believes is one of the lowest
in the industry.
 
     Once review of an application is completed, the Credit Manager communicates
his or her decision to the dealership, or in the case of Contracts directly
originated or purchased by phone or otherwise, to the consumer or the Company's
authorized loan processor, specifying approval, conditional approval (such as an
increase in the downpayment, reduction in the term of the financing, or the
addition of a co-signer to the Contract), or denial.
 
     The dealership is required to deliver the necessary documentation for each
Contract approved for purchase by the Company to the originating Auto Finance
Center. The Company audits such documents for completeness and consistency with
the application, providing final approval for purchase of the Contract once
these requirements have been satisfied. The completed Contract file is then
promptly forwarded to the corporate headquarters.
 
     The Auto Finance Center purchasing the Contract funds the purchase and pays
dealer participation, if any. The dealership can receive 100% of the dealer
participation, at purchase or at month-end, and the Company is entitled to
recover from the dealership over the life of the Contract the unearned portion
of the dealer participation in the event of a prepayment of the purchased
Contract or charge-off of the Contract. The Company also offers three other
participation methods, in which the Company pays less than 100% of the dealer
participation but for which the dealership is under no obligation to refund any
unearned participation if the contract defaults or pre-pays after the expiration
of a set period of time after the Contract purchase date.
 
     The Company conducts a post-funding credit review of a majority of its
Contracts. In the review, the approved application is re-examined to be certain
it complies with the Company's underwriting requirements. The results of these
reviews are then reviewed by senior management to ensure consistent application
of the Company's underwriting standards.
 
     The Company employs a compensation system for its Credit Managers, Account
Managers and Auto Finance Center Managers designed to reward those employees
whose Contract purchases meet the Company's volume and yield objectives while
preserving credit quality. Generally, these bonuses, which are payable monthly,
may constitute up to 40% of an employee's compensation and are initially
calculated based on the volume of Contracts purchased and the yield on such
Contracts. This bonus amount is reduced if the Company's post-funding credit
review reveals that a portion of the purchased Contracts did not satisfy the
Company's underwriting standards. Under this system, 50% of the bonus payment is
based on attainment of Account Manager/Credit Manager team objectives and 50% is
based on attainment of the Auto Finance Center objectives. The Company believes
this incentive compensation system motivates employees to purchase only those
near-prime quality Contracts that meet the Company's objectives of increasing
volume at targeted yields while preserving credit quality.
 
                                        5
<PAGE>   8
 
     The following table sets forth information about the Company's Contracts as
of the dates indicated:
 
<TABLE>
<CAPTION>
                                                             FOR THE YEARS ENDED
                                                                 DECEMBER 31
                                                            (DOLLARS IN THOUSANDS)
                                                ----------------------------------------------
                                                  1995        1996        1997         1998
                                                --------    --------    --------    ----------
<S>                                             <C>         <C>         <C>         <C>
Contracts purchased during the period.........  $199,397    $319,840    $605,905    $1,038,535
Average contract amount.......................  $ 12,033    $ 12,187    $ 12,066    $   12,055
Weighted average initial term (months)........      55.5        56.2        57.0          57.5
Weighted average A.P.R. ......................     15.00%      14.69%      14.59%        14.75%
Percentage of dollar amount of contracts
  collateralized by new motor vehicles
  purchased during the period.................     19.91%      21.47%      21.32%        17.97%
Percentage of dollar amount of contracts
  collateralized by used motor vehicles
  purchased during the period.................     80.09%      78.53%      78.68%        82.03%
</TABLE>
 
     Periodically the Company performs an analysis of its servicing portfolio to
evaluate the effectiveness of its underwriting guidelines. If external economic
factors, credit delinquencies or credit losses change, the Company may adjust
its underwriting guidelines to maintain the asset quality deemed acceptable by
the Company's management.
 
SERVICING AND COLLECTION PROCEDURES
 
     The Company services all Contracts in its servicing portfolio. To reduce
the costs of its servicing operations, the Company has outsourced certain data
processing and billing functions related to its servicing of Contracts. This
includes a three-year contract expiring in February 2000 with a service bureau
to provide certain loan accounting, reporting and servicing functions. Through
these service providers, the Company mails to each obligor a monthly billing
statement 20 days prior to the due date. The Company believes this method has
proven to be more effective in controlling delinquency, and therefore losses,
than payment coupon books which are delivered to the obligor at the time the
Contract is purchased. The Company charges a late fee, where allowed by law, on
any payment received after the expiration of the statutory or contractual grace
period. Most payments from obligors are deposited directly into a lockbox
account while the remainder of payments is received directly by the Company and
promptly deposited by the Company into the lockbox account.
 
     Under the terms of its credit facilities and securitization trusts, the
Company acts as servicer with respect to all Contracts purchased or originated
in its servicing portfolio. The Company receives servicing fees for servicing
securitized Contracts equal to one percent per annum of the outstanding
principal balance of such Contracts. The Company services the securitized
Contracts by collecting payments due from obligors and remitting such payments
to the trustee in accordance with the terms of the servicing agreements. The
Company maintains computerized records with respect to each Contract to record
receipts and disbursements and to prepare related servicing reports.
 
COLLECTION PROCEDURES
 
     Collection activities with respect to delinquent Contracts are performed by
the Company at its Foothill Ranch Collection Center. Collection activities
include prompt investigation and evaluation of the causes of any delinquency. An
obligor is considered delinquent when he or she has failed to make a scheduled
payment under the Contract within 30 days of the related due date (each a "Due
Date").
 
     To automate its collection procedures, the Company uses features of the
computer system of its third party service bureau to provide tracking and
notification of delinquencies. The collection system provides relevant obligor
information (for example, current addresses, phone numbers and loan information)
and records of all Contracts. The system also records an obligor's promise to
pay and affords supervisors the ability to review collection personnel activity
and to modify collection priorities with respect to Contracts. The Company
utilizes a predictive dialing system located at the Foothill Ranch Collection
Center to make phone
 
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<PAGE>   9
 
calls to obligors whose payments are past due by more than eight days but less
than 24 days. The predictive dialer is a computer-controlled telephone dialing
system which dials phone numbers of obligors from a file of records extracted
from the Contract database. By eliminating time wasted on attempting to reach
obligors, the system gives a single collector, on average, the ability to speak
with and work 200 to 250 accounts per day. Once a live voice responds to the
automated dialer's call, the system automatically transfers the call to a
collector and the relevant account information to the collector's computer
screen. The system also tracks and notifies collections management of phone
numbers that the system has been unable to reach within a specified number of
days, thereby promptly identifying for management all obligors who cannot be
reached by telephone.
 
     Once an obligor is 20 days or more delinquent, these accounts are assigned
to specific collectors at the Foothill Ranch Collection Center who have primary
responsibility for such delinquent accounts until they are resolved. To expedite
collections from late paying obligors, the Company uses Western Union "Quick
Collect," which allows an obligor to pay, at numerous locations, any late
payments which are in turn wired daily to the Company's lockbox account by
Western Union. The Company also uses a Western Union payment system that allows
an obligor to authorize the Company to present a draft directly to the obligor's
bank for payment to the Company.
 
     Generally, after a scheduled payment under a Contract continues to be past
due for between 45 and 60 days, the Company will initiate repossession of the
financed vehicle. However, if a Contract is deemed uncollectable, if the
financed vehicle is deemed by collection personnel to be in danger of being
damaged, destroyed or made unavailable for repossession, or if the obligor
voluntarily surrenders the financed vehicle, Onyx may repossess it without
regard to the length or existence of payment delinquency. Repossessions are
conducted by third parties that are engaged in the business of repossessing
vehicles for secured parties. Under California law and the laws of most other
states, after repossession, the obligor generally has an additional period of
time to redeem the financed vehicle before the financed vehicle may be resold by
the Company in an effort to recover the balance due under the Contract.
 
     Losses may occur in connection with delinquent Contracts and can arise in
several ways, including inability to locate the financed vehicle or the obligor,
or because of a discharge of the obligor indebtedness in a bankruptcy
proceeding. The current policy of the Company is to recognize losses at the time
a Contract is deemed uncollectible or during the month a scheduled payment under
a Contract becomes 120 days or more past due, whichever occurs first.
 
     Upon repossession and sale of the financed vehicle, any deficiency
remaining is pursued against the obligor to the extent deemed practical by the
Company and to the extent permitted by law. The loss recognition and collection
policies and practices of the Company may change over time in accordance with
the Company business judgment.
 
MODIFICATIONS AND EXTENSIONS
 
     The Company offers certain credit-related extensions to obligors.
Generally, these extensions are offered only when (i) the Company believes that
the obligor's financial difficulty has been resolved or will no longer impair
the obligor's ability to make future payments, (ii) the extension will result in
the obligor's payments being brought current, (iii) the total number of
credit-related extensions granted on the Contract will not exceed three and the
total credit-related extensions granted on the Contract will not exceed three
months in the aggregate, (iv) there has been no more than one credit-related
extension granted on the Contract in the immediately preceding twelve months,
and (v) Onyx (or its assignee) had held the Contract for at least six months.
Any deviation from this policy requires the concurrence of a Collection
Supervisor and the Company's Collection Manager and the Executive Vice
President, Collections. The total number of annual deferments was less than 3%
of the number of Contracts in the Servicing Portfolio for the years ending
December 31, 1998, and December 31, 1997.
 
                                        7
<PAGE>   10
 
INSURANCE
 
     Each Contract requires the obligor to obtain comprehensive and collision
insurance with respect to the related financed vehicle with the Company named as
a loss payee. In the event that the obligor fails to maintain the required
insurance, however, the Company has purchased limited comprehensive and
collision insurance, referred to as the "Blanket Insurance Policy" coverage. The
Blanket Insurance Policy provides the Company with protection on each uninsured
or underinsured financed vehicle against total loss, damage or theft. The
Company has obtained its Blanket Insurance Policy from Interstate Indemnity
Insurance Company ("Interstate"). For the Blanket Insurance Policy, the Company
is assessed a premium based on the size of the Servicing Portfolio. In 1998, the
Company created an insurance tracking department at its corporate headquarters.
The Company believes that this function will help reduce its exposure to
uninsured motorists, through its prompt follow up on non-compliant obligors.
 
FINANCING AND SALE OF CONTRACTS
 
     The Company finances acquisition and origination of Contracts primarily
through its the credit facilities and through securitizations.
 
     CP Facility. As of December 31, 1998, the Company was party to a $375
million auto loan warehousing program (the "CP Facility"), with Triple-A One
Funding ("Triple A"), up from the $200 million level available under the same
facility at December 31, 1997. The CP Facility is used to fund the purchase or
origination of Contracts. Triple-A is a rated commercial paper asset-backed
conduit lender sponsored by MBIA. MBIA provides credit enhancement to Triple-A
by issuing a financial guarantee insurance policy covering all principal and
interest obligations owed by the Company related to borrowings under the CP
Facility. The Company pledges Contracts as collateral to borrow from Triple-A.
The CP Facility term, as amended, was renewed for a three-year period ending in
September 2001, subject to the annual renewal of a liquidity facility provided
by several financial institutions. After maturity in September 2001, the CP
Facility is subject to annual renewals upon mutual consent of the parties.
 
     In an effort to expand and diversify lending relationships, the Company
created a new special finance subsidiary, Onyx Acceptance Funding Corporation
("Fundco"), during the first quarter of 1998 and negotiated additional lending
lines; two with Merrill Lynch Mortgage Capital, Inc. ("MLMCI") and one with
Salomon Smith Barney Realty Corp., ("SBRC").
 
     The Merrill Line. The $100 million line (the "Merrill Line") provides
funding for the purchase or origination of Contracts and is used in concert with
the CP Facility the Company currently has in place. The Merrill Line has a term
of one year and currently matures in February 2000.
 
     The Residual Lines. Fundco has two $50 million residual facilities with
MLMCI and SBRC, respectively, (the "Residual Lines "). The Residual Lines are
used by the Company to finance operating requirements. The lines utilize a
collateral based formula that sets borrowing availability to a percentage of the
value of excess cash flow to be received from certain securitizations, and, with
respect to the MLMCI facility, a percentage of the amount of the Merrill Line
outstanding on a quarterly basis. The facility provided by MLMCI currently
matures in February 2000; the facility provided by SBRC currently matures in
September 1999.
 
     Revolving Facility. As of December 31, 1998, the Company was party to a
collateralized revolving line of credit, ("Revolving Facility"), with a lending
group for up to $45 million, for working capital and other expenditures for
which the Company's CP Facility and Merrill Line are not available. Under the
Revolving Facility, currently maturing in June 1999, the Company may borrow and
repay during the two-year revolving period up to $45 million.
 
     The facilities and lines above contain affirmative, negative and financial
covenants typical of such credit facilities. The Company was in compliance with
these covenants as of December 31, 1998.
 
     Hedging and Interest Rate Risk Management. The Company employs a hedging
strategy that is intended to minimize the risk of interest rate fluctuations and
which historically has involved the execution of
 
                                        8
<PAGE>   11
 
forward interest rate swaps or use of a pre-funding structure for the Company's
securitizations. The Company is not required to maintain collateral on the
outstanding hedging program.
 
     Securitization. Regular securitizations are an integral part of the
Company's business plan because they allow the Company to increase its
liquidity, provide for redeployment of its capital and reduce risks associated
with interest rate fluctuations. The Company has developed a securitization
program that involves selling interests in pools of its Contracts to investors
through the public issuance of AAA/Aaa rated asset-backed securities. The
Company completed four AAA/Aaa rated publicly underwritten asset-backed
securitizations in the amount of $911.8 million in 1998.
 
     The net proceeds of these securitizations are used to pay down outstanding
indebtedness incurred under the Company's credit facilities to purchase
contracts, thereby creating availability for the purchase of additional
Contracts. Since 1994, the Company has securitized $2.0 billion of its Contracts
in 14 separate transactions. In each of its securitizations, the Company has
sold its Contracts to a newly formed grantor or owner trust which issued
pass-through certificates or notes in an amount equal to the aggregate principal
balance of the Contracts.
 
     To improve the level of profitability from the sale of securitized
Contracts, the Company arranges for credit enhancement to achieve an improved
credit rating on the asset-backed securities issued. This credit enhancement has
taken the form of a financial guaranty issued by MBIA, which issues a financial
guaranty insurance policy (the "Financial Guarantee Insurance Policy") insuring
the payment of principal and interest due on the asset-backed securities.
 
     The Company receives servicing fees for its duties relating to the
accounting for and collection of the Contracts. In addition, the Company is
entitled to the future servicing cash flows. Generally, the Company sells the
Contracts at face value and without recourse, except that certain
representations and warranties with respect to the Contracts are provided by the
Company as the servicer and Onyx Acceptance Financial Corporation ("OAFC") as
the seller to the trusts.
 
     Gains on sale of Contracts in securitizations provide a significant portion
of the Company's revenues. Several factors affect the Company's ability to
complete securitizations of its Contracts, including conditions in the
securities markets generally, conditions in the asset-backed securities market
specifically, the credit quality of the Company's portfolio of Contracts and the
Company's ability to obtain credit enhancement.
 
GOVERNMENT REGULATION
 
     The Company's operations are subject to regulation, supervision, and
licensing under various federal, state and local statutes, ordinances and
regulations. The Company is required to comply with the laws of those states in
which it conducts operations. Management believes that it is in compliance with
these laws and regulations.
 
     Consumer Protection Laws. Numerous federal and state consumer protection
laws and related regulations impose substantial requirements upon lenders and
servicers involved in consumer finance. These laws include the Truth-in-Lending
Act, the Equal Credit Opportunity Act, the Federal Trade Commission Act, the
Fair Credit Reporting Act, the Fair Debt Collection Practices Act, the
Magnuson-Moss Warranty Act, the Federal Reserve Board's Regulations B and Z,
states' adaptations of the Uniform Consumer Credit Code and of the Uniform
Commercial Code (the "UCC") and state motor vehicle retail installment sales
acts and other similar laws. These laws, among other things, require the Company
to provide certain disclosures to applicants, prohibit misleading advertising
and protect against discriminatory financing or unfair credit practices. The
Truth in Lending Act and Regulation Z promulgated thereunder require disclosure
of, among other things, the payment schedule, the finance charge, the amount
financed, the total of payments and the annual percentage rate charged on each
retail installment contract. The Equal Credit Opportunity Act prohibits
creditors from discriminating against loan applicants (including retail
installment contract obligors) on the basis of race, color, sex, age (provided
the applicant has the capacity to contract), marital status, religion, national
origin, the fact that all or part of the applicant's income derives from a
public assistance program, or the fact that the applicant has in good faith
exercised any right under the Consumer Credit Protection Act. Under the Equal
 
                                        9
<PAGE>   12
 
Credit Opportunity Act, creditors are required to make certain disclosures
regarding consumer rights and advise consumers whose credit applications are not
approved of the reasons for the rejection. The rules of the Federal Trade
Commission (the "FTC") limit the types of property a creditor may accept as
collateral to secure a consumer loan and its holder in due course rules provide
for the preservation of the consumer's claims and defenses when a consumer
obligation is assigned to a subject holder. With respect to used vehicles
specifically, the FTC's rule on Sale of Used Vehicles requires that all sellers
of used vehicles prepare, complete and display a Buyer's guide which explains
any applicable warranty coverage for such vehicles. Also, some state laws impose
finance charge ceilings and other restrictions on consumer transactions and
require contract disclosures in addition to those required under federal law.
These requirements impose specific statutory liabilities upon creditors who fail
to comply with their provisions. In some cases, these provisions could affect
the Company's ability to enforce Contracts it purchases or originates.
 
EMPLOYEES
 
     The Company employs personnel experienced in all areas of loan
originations, documentation, collection and administration. The Company employs
and trains specialists in loan processing and servicing with minimal crossover
of duties. At December 31, 1998, the Company had 526 full-time employees, none
of whom were covered by collective bargaining agreements. The Company believes
it has good relationships with its employees.
 
                                       10
<PAGE>   13
 
                                  RISK FACTORS
 
     You should carefully consider the following risks in your evaluation of us
and our common stock. The risks and uncertainties described below are not the
only ones facing our company. Additional risks and uncertainties, including but
not limited to credit, economic, competitive, governmental and financial factors
affecting our operations, markets, financial products, and services and other
factors discussed in our filings with the Securities and Exchange Commission,
may also adversely impact and impair our business. If any of these risks
actually occur, our business, results of operations, cash flows or financial
condition would likely suffer. In such case, the trading price of our common
stock could decline, and you may lose all or part of the money you paid to buy
our common stock.
 
     WE NEED SUBSTANTIAL LIQUIDITY.
 
     We require a substantial amount of liquidity to operate our business. Among
other things, we use such liquidity to:
 
     - acquire Contracts;
 
     - pay dealer participation;
 
     - pay securitization costs and fund spread accounts;
 
     - settle hedge transactions;
 
     - satisfy working capital requirements and pay operating expenses; and
 
     - pay interest expense.
 
     A substantial portion of our revenues in any period is represented by gain
on sale of Contracts generated by a securitization in such period but the cash
underlying such revenues is received over the life of the Contracts. In
addition, cash paid by us for dealer participation is not recovered at the time
of securitizations, but over the life of the Contract.
 
     We have operated and expect to continue to operate on a negative cash flow
basis and expect to do so in the future as long as the volume of Contract
purchases continues to grow. We have historically funded these negative
operating cash flows principally through borrowings from financial institutions,
sales of equity securities and sales of subordinated notes. We cannot assure
you, however, that (1) we will have access to the capital markets in the future
for equity, debt issuances or securitizations, or (2) financing through
borrowings or other means will be available on acceptable terms to satisfy our
cash requirements. If we are unable to access the capital markets or obtain
acceptable financing, our results of operations, financial condition and cash
flows would be materially and adversely affected. See "Management's Discussion
and Analysis of Financial Condition and Results of Operations--Liquidity and
Capital Resources."
 
     WE DEPEND ON WAREHOUSE FINANCING.
 
     We depend on warehousing facilities with financial institutions to finance
the purchase or origination of Contracts pending securitization. See
"Business--Financing and Sale of Contracts." Our business strategy requires that
such financing continue to be available during the warehousing period.
 
     Whether the CP Facility continues to be available to us depends on, among
other things, whether we maintain a target net yield for the Contracts financed
under the CP Facility and comply with certain financial covenants contained in
the sale and servicing agreement between us, as seller, and our wholly-owned
special purpose finance subsidiary, OAFC, as purchaser. These financial
covenants include:
 
     - a minimum ratio of net worth to total assets;
 
     - a maximum ratio of credit enhancement assets to tangible net worth;
 
     - earnings before interest, depreciation and taxes coverage ratio; and
 
     - minimum cash on hand.
 
                                       11
<PAGE>   14
 
     We also have a warehouse line of credit with Merrill Lynch. Whether the
Merrill Line continues to be available to us depends on whether we meet certain
debt to equity ratios and minimum equity requirements.
 
     We cannot assure you that our CP Facility or Merrill Line will be available
to us or that it will be available on favorable terms. If we are unable to
arrange new warehousing credit facilities or extend our existing credit
facilities when they expire, our results of operations, financial condition and
cash flows could be materially and adversely affected.
 
     WE DEPEND ON RESIDUAL FINANCING.
 
     When we sell our Contracts in securitizations, we receive cash and a
residual interest in the securitized assets ("RISA"). The RISA represents the
future cash flows to be generated by the Contracts in excess of the interest
paid on the securities issued in the securitization and other costs of servicing
the Contracts and completing the securitization. (See "Management's Discussion
and Analysis of Financial Condition and Results of
Operations--Securitizations"). We use the RISA from each securitization as
collateral to borrow cash to finance our operations. The amount of cash advanced
by our lenders under our residual lines of credit depends on a collateral
formula that is determined in large part by how well our securitized Contracts
perform. If our portfolio of securitized Contracts experienced higher
delinquency and loss ratios than expected, then the amount of money we could
borrow under the residual lines would be reduced. The reduction in availability
under these residual lines could materially and adversely affect our operations,
financial condition and cash flows.
 
     Whether our Revolving Facility continues to be available to us depends on,
among other things, whether we meet financial covenants that are substantially
similar to those of the CP Facility, except that leverage is measured as the
ratio of net worth plus subordinated debt to total liabilities plus net worth.
Additionally, we are subject under the documentation governing the Residual
Lines, to minimum net worth and subordinated debt plus net worth tests, a
limitation on quarterly operating losses and covenants restricting
delinquencies, losses, prepayments and net yields of Contracts included in a
securitization. The loss of access to these Residual Lines could materially and
adversely affect our operations, financial condition and cash flows.
 
     WE DEPEND ON SECURITIZATIONS TO GENERATE REVENUE.
 
     We rely significantly upon securitizations to generate cash proceeds for
repayment of our warehouse credit facilities and to create availability to
purchase additional Contracts. Further, gain on sale of Contracts generated by
our securitizations represents a significant portion of our revenues. Our
ability to complete securitizations of our Contracts is affected by the
following factors, among other things:
 
     - conditions in the securities markets generally;
 
     - conditions in the asset-backed securities market specifically;
 
     - the credit quality of our portfolio of Contracts; and
 
     - our ability to obtain credit enhancement.
 
     If we were unable to profitably securitize a sufficient number of our
Contracts in a particular financial reporting period, then our revenues for such
period could decline and could result in lower income or a loss for such period.
In addition, unanticipated delays in closing a securitization could also
increase our interest rate risk by increasing the warehousing period for our
Contracts. See "Management's Discussion and Analysis of Results of Operations
and Financial Condition--Liquidity and Capital Resources," and "Business
Financing and Sale of Contracts."
 
     WE DEPEND ON CREDIT ENHANCEMENT.
 
     From inception through December 31, 1998, each of our securitizations has
utilized credit enhancement in the form of a financial guarantee insurance
policy issued by MBIA, or its predecessor in order to achieve "AAA/Aaa" ratings.
This form of credit enhancement reduces the costs of the securitizations
relative to
 
                                       12
<PAGE>   15
 
alternative forms of credit enhancements currently available to us. MBIA is not
required to insure future securitizations and we are not restricted in our
ability to obtain credit enhancement from providers other than MBIA or to use
other forms of credit enhancement. We cannot assure you that:
 
     - we will be able to continue to obtain credit enhancement in any form from
       MBIA;
 
     - we will be able to obtain credit enhancement from any other provider of
       credit enhancement on acceptable terms; or
 
     - future securitizations will be similarly rated.
 
     We also rely on MBIA's financial guarantee insurance policy to reduce our
borrowing cost under the CP Facility. If MBIA's credit rating is downgraded or
if it withdraws our credit enhancement, we could be subject to higher interest
costs for our future securitizations and financing costs during the warehousing
period. Such events could have a material adverse effect on our results of
operations, financial condition and cash flows.
 
     WE ARE SUBJECT TO INTEREST RATE FLUCTUATIONS.
 
     Our profitability is largely determined by the difference, or "spread,"
between the effective rate of interest received by us on the Contracts acquired
and the interest rates payable under our credit facilities during the
warehousing period and for certificates issued in securitizations.
 
     Several factors affect our ability to manage interest rate risk. First, the
Contracts are purchased or originated at fixed interest rates, while amounts
borrowed under our credit facilities bear interest at variable rates that are
subject to frequent adjustment to reflect prevailing rates for short-term
borrowings. Our policy is to increase the buy rates we issue to dealerships or
to increase rates we use to solicit consumers for Contracts in response to
increases in our cost of funds during the warehousing period. However, there is
generally a time lag before such increased borrowing costs can be offset by
increases in the buy rates for Contracts and, in certain instances, the rates
charged by our competitors may limit our ability to pass through our increased
costs of warehousing financing.
 
     Second, the spread can be adversely affected after a Contract is purchased
or originated and while it is held during the warehousing period by increases in
the prevailing rates in the commercial paper markets. While the CP Facility
permits us to select maturities of up to 270 days for commercial paper issued
under the CP Facility, if we selected a shorter maturity or had a delay in
completing a securitization, we would face this risk.
 
     Third, the interest rate demanded by investors in securitizations is a
function of prevailing market rates for comparable transactions and the general
interest rate environment. Because the Contracts purchased or originated by us
have fixed rates, we bear the risk of spreads narrowing because of interest-rate
increases during the period from the date the Contracts are purchased until the
pricing of our securitization of such Contracts. We employ a hedging strategy
that is intended to minimize this risk and which historically has involved the
execution of forward interest rate swaps or use of a pre-funding structure for
our securitizations. However, we cannot assure you that this strategy will
consistently or completely offset adverse interest-rate movements during the
warehousing period or that we will not sustain losses on hedging transactions.
Our hedging strategy requires estimates by management of monthly Contract
acquisition volume and timing of our securitizations. If such estimates are
materially inaccurate, then our gains on sales of Contracts, results of
operations and cash flows could be materially and adversely affected.
 
     We also have exposure to interest rate fluctuations under the Residual
Lines. The interest rates are based on a LIBOR and Prime Rate. The LIBOR lines
reset each month while the Prime Rate line is reset at any change in the Prime
rates. In periods of increasing interest rates our cash flows, results of
operations and financial condition could be adversely affected.
 
     In addition, we have some interest rate exposure to falling interest rates
to the extent that the interest rates charged on Contracts sold in a
securitization with a pre-funding structure decline below the rates prevailing
at the time that the securitization prices. Such a rate decline would reduce the
interest rate spread because the interest rate on the notes and/or the
certificates would remain fixed. In time, this would negatively impact the gains
on sale of Contracts and our results of operations and cash flows.
 
                                       13
<PAGE>   16
 
     WE WILL BE ADVERSELY AFFECTED WHEN CONTRACTS ARE PREPAID OR DEFAULTED.
 
     Our results of operations, financial condition, cash flows, and liquidity
depend, to a material extent, on the performance of Contracts purchased,
originated, warehoused, and securitized by us. A portion of the Contracts
acquired by us may default or prepay during the warehousing period. We bear the
risk of losses resulting from payment defaults during the warehousing period. In
the event of payment default, the collateral value of the financed vehicle may
not cover the outstanding Contract balance and costs of recovery. We maintain an
allowance for credit losses on Contracts held during the warehousing period
which reflects management's estimates of anticipated credit losses during such
period. If the allowance is inadequate, then we would recognize as an expense
the losses in excess of such allowance and our results of operations could be
adversely affected. In addition, under the terms of the CP Facility, we are not
able to borrow against defaulted Contracts.
 
     Our servicing income can also be adversely affected by prepayment of or
defaults under Contracts in the servicing portfolio. Our contractual servicing
revenue is based on a percentage of the outstanding principal balance of such
Contracts. Thus, if Contracts are prepaid or charged-off, then our servicing
revenue will decline to the extent of such prepaid or charged-off Contracts.
 
     The gain on sale of Contracts recognized by us in each securitization and
the value of the retained interest in securitized assets ("RISA") in each
transaction reflects management's estimate of future credit losses and
prepayments for the Contracts included in such securitization. If actual rates
of credit loss or prepayments, or both, on such Contracts exceed those
estimated, the value of the RISA would be impaired. We periodically review our
credit loss and prepayment assumptions relative to the performance of the
securitized Contracts and to market conditions. In this event, our results of
operations and liquidity could be adversely affected if credit loss or
prepayment levels on securitized Contracts substantially exceed anticipated
levels. If necessary, we would write-down the value of the RISA through a
reduction to servicing fee income. Further, any write down of RISA would reduce
the amount available to us under our residual lines, thus requiring us to pay
down amounts outstanding under the facilities or provide additional collateral
to cure the borrowing base deficiency.
 
     WE WILL BE ADVERSELY AFFECTED IF WE LOSE SERVICING RIGHTS.
 
     Our results of operations, financial condition and cash flows would be
materially and adversely affected if any of the following were to occur:
 
     - loss of the servicing rights under our sale and servicing agreement for
       the CP Facility;
 
     - loss of the servicing rights under the applicable pooling and servicing
       or sale and servicing agreement of a grantor trust and owner trust,
       respectively; or
 
     - a trigger event that would block release of future servicing cash flows
       from the grantor trusts' or owner trusts' respective spread accounts.
 
     We are entitled to receive servicing income only while we act as servicer
under the applicable sales and servicing agreement or pooling and servicing
agreement for securitized Contracts. Under the CP Facility ur right to act as
servicer can be terminated by MBIA, as program manager, upon the occurrence of
certain event.
 
     OUR QUARTERLY EARNINGS MAY FLUCTUATE.
 
     Our revenues and losses have fluctuated in the past and are expected to
fluctuate in the future principally as a result of the following factors:
 
     - the timing and size of our securitizations;
 
     - variations in the volume of our Contract acquisitions;
 
     - the interest rate spread between our cost of funds and the average
       interest rate of purchased Contracts;
 
                                       14
<PAGE>   17
 
     - the effectiveness of our hedging strategies; and
 
     - the investor rate for securitizations.
 
     Any significant decrease in our quarterly revenues could have a material
adverse effect on our results of operations, financial condition and cash flows.
 
     WE DEPEND ON KEY PERSONNEL.
 
     Our future operating results depend in significant part upon the continued
service of our key senior management personnel, none of whom is bound by an
employment agreement. Our future operating results also depend in part upon our
ability to attract and retain qualified management, technical, and sales and
support personnel for our operations. Competition for such personnel is intense.
We cannot assure you that we will be successful in attracting or retaining such
personnel. The loss of any key employee, the failure of any key employee to
perform in his or her current position or our inability to attract and retain
skilled employees, as needed, could materially and adversely affect our results
of operations, financial condition and cash flows. We presently maintain a key
man life insurance policy on John W. Hall, our president and chief executive
officer, in the amount of $3 million.
 
     OUR INDUSTRY IS HIGHLY COMPETITIVE.
 
     Competition in the field of financing retail motor vehicle sales is
intense. The automobile finance market is highly fragmented and historically has
been serviced by a variety of financial entities including the captive finance
affiliates of major automotive manufacturers, banks, savings associations,
independent finance companies, credit unions and leasing companies. Several of
these competitors have greater financial resources than we do. Many of these
competitors also have long-standing relationships with automobile dealerships
and offer dealerships or their customers other forms of financing or services
not provided by us. Our ability to compete successfully depends largely upon our
relationships with dealerships and the willingness of dealerships to offer those
Contracts that meet our underwriting criteria to us for purchase. We cannot
assure you that we will be able to continue to compete successfully in the
markets we serve.
 
     WE MAY BE HARMED BY ADVERSE ECONOMIC CONDITIONS.
 
     We are a motor vehicle consumer auto finance company whose activities are
dependent upon the sale of motor vehicles. Our ability to continue to acquire
Contracts in the markets in which we operate and to expand into additional
markets is dependent upon the overall level of sales of new and used motor
vehicles in those markets. A prolonged downturn in the sale of new and used
motor vehicles, whether nationwide or in the California markets, could have an
adverse impact upon us, our results of operations and our ability to implement
our business strategy. See "Business--Competition."
 
     The automobile industry generally is sensitive to adverse economic
conditions both nationwide and in California. Periods of rising interest rates,
reduced economic activity or higher rates of unemployment generally result in a
reduction in the rate of sales of motor vehicles and higher default rates on
motor vehicle loans. We cannot assure you that such economic conditions will not
occur, or that such conditions will not result in severe reductions in our
revenues or the cash flows available to us to permit us to remain current on our
credit facilities. See "Risk Factors--We Need Substantial Liquidity."
 
     WE ARE SUBJECT TO MANY REGULATIONS.
 
     Our business is subject to numerous federal and state consumer protection
laws and regulations, which, among other things:
 
     - require us to obtain and maintain certain licenses and qualifications;
 
     - limit the interest rates, fees and other charges we are allowed to
       charge;
 
     - limit or prescribe certain other terms of our Contracts;
 
                                       15
<PAGE>   18
 
     - require specific disclosures; and
 
     - define our rights to repossess and sell collateral.
 
     We believe that we are in compliance in all material respects with all such
laws and regulations, and that such laws and regulations have had no material
adverse effect on our ability to operate our business. However, we will be
materially and adversely affected if we fail to comply with:
 
     - applicable laws and regulations;
 
     - changes in existing laws or regulations;
 
     - changes in the interpretation of existing laws or regulations; or
 
     - any additional laws or regulations that may be enacted in the future.
 
     WE MAY HAVE COMPUTER PROBLEMS RELATED TO THE YEAR 2000.
 
     Because of the nature of our consumer finance business and the increasing
number of electronic transactions in this industry, we have come to rely heavily
on our and third party computer systems, business applications and other
information technology systems ("IT systems"). Historically, many IT systems
were developed to recognize the year as a two-digit number, with the digit "00"
being recognized as the year 1900. The year 2000 presents a number of potential
problems for such systems, including potentially significant processing errors
or failure. Given our reliance on computer systems, our results of operations
and cash flows could be materially adversely affected by any significant errors
or failures. See "Management's Discussion and Analysis of Financial Condition
and Results of Operations--Year 2000 Compliance."
 
ITEM 2. PROPERTIES
 
     The Company did not own any real property at December 31, 1998. In December
1998, the Company began moving into it new headquarters in Foothill Ranch,
California after signing a 10-year lease for approximately 82,000 square feet of
office space. The Company also leases office space for its 14 Auto Finance
Centers.
 
ITEM 3. LITIGATION
 
     The Company is currently not a party to any material litigation, although
it is involved from time to time in routine litigation incident to its business.
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
 
     No matters were submitted during the fourth quarter of the fiscal year
covered by this Annual Report on Form 10-K to a vote of security holders,
through the solicitation of proxies or otherwise.
 
                                       16
<PAGE>   19
 
                                    PART II
 
ITEM 5.MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS
       PRICE RANGE OF COMMON STOCK
 
     The Company's Common Stock is traded on the NASDAQ under the symbol "ONYX".
The following table provides quarterly high and low closing prices for the
Company's Common Stock for the years ended December 31, 1998, and December 31,
1997.
 
<TABLE>
<CAPTION>
                                                               HIGH      LOW
                                                              ------    -----
<S>                                                           <C>       <C>
1998
First quarter...............................................  $11.50    $7.25
Second quarter..............................................  $12.63    $8.88
Third quarter...............................................  $10.31    $5.63
Fourth quarter..............................................  $ 6.75    $4.88
 
1998
First quarter...............................................  $10.63    $7.25
Second quarter..............................................  $ 8.50    $6.50
Third quarter...............................................  $ 8.00    $7.00
Fourth quarter..............................................  $ 7.88    $6.38
</TABLE>
 
     At March 16, 1999, there were approximately 955 holders of the Company's
Common Stock.
 
DIVIDEND POLICY
 
     The Company has never declared or paid dividends on its Common Stock. The
Company currently intends to retain any future earnings for its business and
does not anticipate declaring or paying any dividends on the Common Stock in the
foreseeable future. In addition, the Company's ability to declare or pay
dividends is restricted by the terms of the credit facilities.
 
                                       17
<PAGE>   20
 
ITEM 6. SELECTED FINANCIAL DATA
 
                            SELECTED FINANCIAL DATA
 
     The following selected financial data should be read in conjunction with
the Consolidated Financial Statements of the Company and the notes thereto and
Management's Discussion and Analysis of Financial Condition and Results of
Operations included elsewhere herein.
 
     As required by the Financial Accounting Standards Board's Special Report,
"A Guide to Implementation of Statement 125 on Accounting for Transfers and
Servicing of Financial Assets and Extinguishments of Liabilities, Second
Edition," dated December 1998, and related guidance set forth in statements made
by the staff of the Securities and Exchange Commission on December 8, 1998, Onyx
has restated its 1996 and 1997 consolidated financial statements to reflect the
change in the method of measuring and accounting for credit enhancement assets
on its securitization transactions to the cash-out method from the cash-in
method.
 
<TABLE>
<CAPTION>
                                                             FOR THE YEARS ENDED DECEMBER 31,
                                                   -----------------------------------------------------
                                                    1994       1995       1996       1997        1998
                                                   -------   --------   --------   --------   ----------
                                                    (DOLLARS IN THOUSANDS EXCEPT FOR PER SHARE AMOUNTS)
<S>                                                <C>       <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA:
  Net interest income............................  $ 1,311   $  2,225   $  4,140   $  5,036   $    7,312
  Servicing fee income...........................      269      1,381      3,236      9,189       16,663
  Gain on sale of contracts......................      515      2,012     15,251     19,586       36,417
                                                   -------   --------   --------   --------   ----------
  Total revenues.................................    2,095      5,618     22,627     33,811       60,392
                                                   -------   --------   --------   --------   ----------
  Provision for credit losses....................      208        465        266        785        1,580
  Operating expenses.............................    5,392      8,340     15,394     30,740       48,427
                                                   -------   --------   --------   --------   ----------
  Total expenses.................................    5,600      8,805     15,660     31,525       50,007
                                                   -------   --------   --------   --------   ----------
  Income (loss) before income taxes..............   (3,505)    (3,187)     6,967      2,286       10,385
  Income taxes...................................        0          0        851        984        4,310
                                                   -------   --------   --------   --------   ----------
  Net income (loss)..............................  $(3,505)  $ (3,187)  $  6,116   $  1,302   $    6,075
                                                   =======   ========   ========   ========   ==========
  Net income (loss) available to common
    stockholders.................................  $(4,081)  $ (3,763)  $  6,116   $  1,302   $    6,075
                                                   =======   ========   ========   ========   ==========
  Net income (loss) per share of Common Stock:
    Basic........................................  $ (1.89)  $  (1.68)  $   1.19   $   0.22   $     0.99
    Diluted......................................  $ (1.89)  $  (1.68)  $   1.09   $   0.21   $     0.95
  Basic shares outstanding.......................    2,158      2,234      5,159      6,000        6,112
  Diluted shares outstanding.....................    2,158      2,234      5,585      6,294        6,425
OPERATING DATA:
  Contracts purchased during the period..........  $85,723   $199,397   $319,840   $605,905   $1,038,535
  Number of Contracts purchased during the
    period.......................................    7,619     16,571     26,244     50,214       86,150
  Contracts securitized during the period........  $38,601   $105,000   $405,514   $527,276   $  911,760
  Number of active dealerships (at end of
    period)......................................      380        769      1,471      2,846        5,401
  Operating expenses as percentage of average
    servicing portfolio during the period(1).....     19.1%       5.9%       4.9%       5.5%         4.7%
SELECTED PORTFOLIO DATA:
  Servicing portfolio (at end of period).........  $74,581   $218,207   $400,665   $757,277   $1,345,961
  Average servicing portfolio during the
    period(1)....................................  $28,291   $141,029   $311,340   $563,343   $1,023,237
  Number of contracts in servicing portfolio (at
    end of period)...............................    6,893     20,156     38,275     73,502      131,862
  Weighted average annual percentage rate (at end
    of period)(2)................................    14.01%     15.00%     14.69%     14.66%       14.72%
  Delinquencies as a percentage of the dollar
    amount of servicing portfolio (at end of
    period)(3)...................................     0.07%      1.20%      2.03%      2.51%        2.83%
  Net charge-offs as a percentage of the average
    servicing portfolio during the period(1).....     0.00%      0.37%      1.63%      2.03%        1.72%
</TABLE>
 
                                       18
<PAGE>   21
 
<TABLE>
<CAPTION>
                                                               AS OF DECEMBER 31,
                                             ------------------------------------------------------
                                              1994        1995       1996        1997        1998
                                             -------    --------    -------    --------    --------
<S>                                          <C>        <C>         <C>        <C>         <C>
BALANCE SHEET DATA:
  Cash and cash equivalents................  $10,252    $  1,623    $   603    $    991    $  1,929
  Contracts held for sale(4)...............   40,313     116,893     12,238      63,380     151,952
  Credit enhancement assets................    3,085      12,390     37,144      71,736     112,953
  Total assets.............................   57,095     136,077     54,083     141,836     275,422
  Warehouse borrowings.....................   40,850     112,380     10,108      60,506     150,044
  Revolving credit and residual lines......        0       9,569      2,500      30,000      49,556
  Subordinated debt........................   10,000      10,000          0           0      10,000
  Redeemable series A preferred stock......    8,803       9,379          0           0           0
  Stockholders' equity (deficit)...........   (4,122)     (7,896)    36,358      37,717      43,824
</TABLE>
 
- ---------------
(1) Averages are based on daily balances.
 
(2) The weighted averages are based on the serviced portfolio outstanding at the
    end of the period.
 
(3) Excludes repossessed inventory.
 
(4) Contracts held for sale excludes dealer participation and allowance for
    credit losses. See Note 5 to the Consolidated Financial Statements.
 
ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS
 
OVERVIEW
 
     Onyx is a specialized consumer finance company engaged in the purchase,
origination, securitization and servicing of Contracts originated by franchised
and select independent automobile dealerships in the United States and to a
lesser extent the origination or purchase of motor vehicle loans through a
subsidiary of Onyx on a direct basis to consumers (collectively the
"Contracts"). The Company focuses its efforts on acquiring Contracts that are
collateralized by late model used and, to a lesser extent, new automobiles, that
are entered into with purchasers whom the Company believes have a favorable
credit profile. Since commencing the purchase of Contracts in February 1994, the
Company has acquired more than $2.2 billion in Contracts from over 5,400
dealerships and has expanded its operations from a single office in California
to 14 Auto Finance Centers serving many regions of the United States.
 
     The Company generates revenues primarily through the purchase, origination,
warehousing, subsequent securitization and ongoing servicing of Contracts. The
Company earns net interest income on Contracts held during the warehousing
period. Upon the securitization and sale of Contracts, the Company recognizes a
gain on sale of Contracts, receives future servicing cash flows and earns fees
from servicing the securitized Contracts.
 
     As required by the Financial Accounting Standards Board's Special Report,
"A Guide to Implementation of Statement 125 on Accounting for Transfers and
Servicing of Financial Assets and Extinguishments of Liabilities, Second
Edition," dated December 1998, and related guidance set forth in statements made
by the staff of the Securities and Exchange Commission on December 8, 1998, the
Company restated its 1997 and 1996 consolidated financial statements to reflect
the change in the method of measuring and accounting for credit enhancement
assets on its securitization transactions to the cash-out method from the
cash-in method.
 
                                       19
<PAGE>   22
 
     The following table illustrates the changes in the Company's Contract
acquisition volume, total revenue, securitization activity and servicing
portfolio during the past three fiscal years.
 
                         SELECTED FINANCIAL INFORMATION
 
<TABLE>
<CAPTION>
                                                             FOR THE YEARS ENDED DECEMBER 31,
                                                            ----------------------------------
                                                              1996        1997         1998
                                                            --------    --------    ----------
                                                                  (DOLLARS IN THOUSANDS)
<S>                                                         <C>         <C>         <C>
Contracts purchased during year...........................  $319,840    $605,905    $1,038,535
Average monthly purchases during the year.................    26,653      50,492        86,544
Gain on sale of contracts.................................    15,251      19,586        36,417
Total revenue(1)..........................................    22,627      33,811        60,392
Contracts securitized during the year.....................   405,514     527,276       911,760
Servicing portfolio at year end...........................   400,665     757,277     1,345,961
</TABLE>
 
- ---------------
(1) Total revenue is comprised of net interest income, servicing fee income and
    gain on sale of contracts.
 
CONTRACTS PURCHASED AND SERVICING PORTFOLIO
 
     Since its inception, the Company has experienced significant growth in its
purchased volume of Contracts. Acquisition volume for the year ended December
31, 1998, was $1,039 million compared to $605.9 million for the year ended
December 31, 1997, representing an increase of 71.0% from 1997 to 1998. This
growth in acquisition volume is attributable primarily to (i) the opening of
four additional Auto Finance Centers during 1998 and (ii) an increased
penetration of existing dealers due to the maturation of existing relationships.
 
     The Company's increase in Contract acquisition volume has resulted in the
growth in the Company's servicing portfolio. The servicing portfolio at December
31, 1998, was $1,346 million compared to $757.3 million at December 31, 1997, an
increase of 78%.
 
NET INTEREST INCOME
 
     Net interest income consists primarily of the difference between the rate
earned on Contracts held on the balance sheet during the warehousing period and
the interest costs associated with the Company's borrowings to finance the
warehousing of such Contracts. The following table illustrates the weighted
average rate earned on Contracts, the weighted average rate paid on borrowings
and the corresponding net interest rate spread.
 
                            NET INTEREST RATE SPREAD
 
<TABLE>
<CAPTION>
                                                  FOR THE YEARS ENDED DECEMBER 31,
                                                  ---------------------------------
                                                   1996         1997         1998
                                                  -------      -------      -------
<S>                                               <C>          <C>          <C>
Yield on contracts(1)...........................   13.66%       13.85%       13.96%
Cost of borrowings..............................    7.14         7.03         7.45
Net interest rate spread........................    6.52         6.82         6.51
</TABLE>
 
- ---------------
(1) The yield on Contracts is net of dealer participation amortized expenses.
 
  GAIN ON SALE OF CONTRACTS
 
     The Company computes a gain on sale with respect to contracts securitized
based on the present value of the estimated future excess cash flows to be
received from such contracts using a market discount rate. Gain on sale is
recorded as a credit enhancement asset on the statement of financial condition
and is amortized against servicing income over the life of the contracts. The
gain recorded in the statement of income is adjusted for prepaid dealer
participation, issuance costs and the effect of hedging activities.
 
                                       20
<PAGE>   23
 
     The Company recorded gains on sale of Contracts of $36.4 million on the
sale of $911.8 million of Contracts in 1998 for its securitizations. The gain on
sale of Contracts is affected by the amount of Contracts securitized and the net
interest rate spread on those Contracts. The following table illustrates the net
interest rate spread for each of the Company's securitizations:
 
<TABLE>
<CAPTION>
                                                          SECURITIZATION TRANSACTIONS
                                    -----------------------------------------------------------------------
                                                  REMAINING     WEIGHTED   WEIGHTED
                                                  BALANCE AT    AVERAGE    AVERAGE
                                     ORIGINAL    DECEMBER 31,   CONTRACT   INVESTOR     GROSS        NET
          SECURITIZATION             BALANCE         1998       RATE(1)      RATE     SPREAD(2)   SPREAD(3)
          --------------            ----------   ------------   --------   --------   ---------   ---------
                                                            (DOLLARS IN THOUSANDS)
<S>                                 <C>          <C>            <C>        <C>        <C>         <C>
1996-1 Grantor Trust..............  $  100,500    $   16,683     15.07%      5.40%      9.67%       3.83%
1996-2 Grantor Trust..............      85,013        19,967     14.84       6.40       8.44        3.61
1996-3 Grantor Trust..............     120,000        35,750     14.54       6.45       8.09        3.14
1996-4 Grantor Trust..............     100,000        36,586     14.80       6.20       8.60        3.28
1997-1 Grantor Trust..............      90,000        38,147     13.86       6.55       7.31        2.78
1997-2 Grantor Trust..............     121,676        59,963     14.85       6.35       8.50        3.11
1997-3 Grantor Trust..............     149,600        85,408     14.77       6.35       8.42        3.30
1997-4 Grantor Trust..............     166,000       107,271     14.69       6.30       8.39        3.27
1998-1 Grantor Trust..............     173,000       124,361     14.91       5.95       8.96        3.40
1998-A Owner Trust................     208,759       168,442     14.73       5.87       8.86        3.34
1998-B Owner Trust................     250,000       223,903     14.73       5.78       8.95        3.18
1998-C Owner Trust................     280,000       266,677     14.89       5.72       9.17        3.51
                                    ----------    ----------
          Total...................  $1,844,548    $1,183,158
                                    ==========    ==========
</TABLE>
 
- ---------------
(1) As of issue date.
 
(2) Difference between weighted average contract rate and weighted average
    investor rate as of the issue date.
 
(3) Difference between weighted average contract rate and weighted average
    investor rate, net of underwriting costs, other issuance costs, servicing
    fees, estimated credit losses, ongoing financial guarantee insurance policy
    premiums, and the hedging gain or loss.
 
(4) The Company assumes an average prepayment speed of 1.75% ABS, a discount
    rate of 350bp above the weighted average investor rate, and utilizes a
    lifetime loss rate ranging from 3.5% to 4.0% of the original balance.
 
SERVICING FEE INCOME
 
     Contractual servicing is earned at a rate of 1.0% per annum on the
outstanding principal balance of Contracts securitized and is consistent with
industry standards. Excess servicing income is dependent upon the average excess
spread on the Contracts sold and the performance of the Contracts. Servicing fee
income is related to the size of the serviced portfolio and also includes
investment interest, extension fees, document fees and other fees charged to
customer accounts.
 
RESULTS OF OPERATIONS
 
  YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
     The Company had net income of $6.1 million for the year ended December 31,
1998, compared to net income of $1.3 million and $6.1 million for the years
ended December 31, 1997 and 1996. The increase in net income from 1997 to 1998
is attributable to several factors, including (i) a 73% increase in the dollar
volume of Contracts securitized, resulting in an 86% increase in gain on sale,
(ii) higher servicing fee income due to improved performance of Contracts
securitized and an increase in the serviced portfolio and (iii) improvements in
the cost structure of the Company which resulted in a decline in operating
expenses as a percentage of average servicing portfolio to 4.73% from 5.46% in
1997. The reduction in net income from 1996
 
                                       21
<PAGE>   24
 
to 1997 was attributable to several factors, most notably to the Company's
commitment to build reserves in the face of increasing delinquency and credit
loss ratios related to purchases of Contracts in the second half of 1995 and the
first half of 1996 by one of the Company's Auto Finance Centers. Management
believes that the Company is adequately reserved at this time. Additionally, the
losses incurred by the Company during its start-up phase (calendar years 1994
and 1995) generated net operating loss carryforwards which were fully utilized
in 1996. The unavailability of these carryforwards in 1997 accounted for a
significant portion of the net income differential between 1997 and 1996.
 
     Net Interest Income. Net interest income increased by 46% to $7.3 million
for the year ended December 31, 1998, from $5.0 million for the year ended
December 31, 1997, and from $4.1 million for the year ended December 31, 1996.
The increase is due to an increase in the average amount of Contracts held for
sale during 1998 as compared to 1997 and 1996. This more than offset the effect
of decline in net interest margins in 1998 compared to 1997. Net interest
margins declined to 6.51% in 1998 compared to 6.82% in 1997 and 6.52% in 1996
while the average amount of Contracts held for sale increased to $148.7 million
compared to $85.7 million in 1997 and $80.6 million in 1996. The yield on
contracts held for sale increased by 0.11% to 13.96% for the year ended December
31, 1998, compared to 13.85% for the year ended December 31, 1997, and 13.66%
for the year ended December 31, 1996. In addition, the Company's cost of
borrowings increased by 0.42% to 7.45% compared to 7.03% at December 31, 1997,
and 7.14% at December 31, 1996. In addition to the interest paid on warehouse
borrowings, the Company includes the interest it pays on its residual line
borrowings, subordinated debt, and capitalized lease obligations as components
of its cost of funds. The increase in funding costs in 1998 was due to a mix
shift amongst these lines rather than to an increase in borrowings rates.
 
     Servicing Fee Income. Servicing fee income increased to $16.7 million for
the year ended December 31, 1998, from $9.2 million for the year ended December
31, 1997, and from $3.2 million for the year ended December 31, 1996. The
increase was attributable to a significant increase in the size of the average
servicing portfolio in addition to the improved performance of secured
Contracts. For the year ended December 31, 1998, the size of the average
servicing portfolio increased to $1.02 billion from $563.3 million and from
$311.3 million for the same period in 1997 and 1996.
 
     Gain on Sale of Contracts. The Company completed four securitizations
totaling $911.8 million during the year ended December 31, 1998, resulting in
gains on sale of $36.4 million compared to four securitizations totaling $527.3
million during the year ended December 31, 1997, resulting in gains on sale of
Contracts totaling $19.6 million, and four securitizations for the year ended
December 31, 1996, resulting in gains on sale of Contracts of $15.2 million. The
average net spread on the 1998 securitizations was 3.36% compared to 3.16% in
1997 and 3.44% in 1996.
 
     Provision for Credit Losses. The Company maintains an allowance for credit
losses to cover anticipated losses on the Contracts held on statement of
financial condition. The allowance for credit losses is increased by charging
the provision for credit losses and decreased by actual losses on the Contracts
held on statement of financial condition or by the sale of Contracts held on
statement of financial condition. The level of the allowance is based
principally on the outstanding balance of Contracts held on statement of
financial condition, and historical loss trends. When the Company sells
Contracts in a securitization transaction, it reduces its allowance for credit
losses and factors potential losses into its calculations of gain on sale. The
increase in the provision for credit losses for the year ended December 31, 1998
as compared to December 31, 1997 and 1996 is a result of the increase in
Contracts held for sale at the end of each year.
 
     Salaries and Benefits Expense. The Company incurred salary and benefit
expenses of $26.8 million during the year ended December 31, 1998, compared to
$17.4 million during the year ended December 31, 1997, and $8.5 million for the
year ended December 31, 1996. In order to support the growth of its operations
and the servicing portfolio, the number of employees increased from 221 at
December 31, 1996, to 319 at December 31, 1997, to 526 at December 31, 1998.
 
     Other Operating Expenses. Other operating expenses increased to $21.7
million at December 31, 1998, from $13.3 million at December 31, 1997, and from
$6.8 million for the year ended December 31, 1996. The majority of increases
were due to the growth of the average servicing portfolio from $311.3 million to
 
                                       22
<PAGE>   25
 
$563.3 million and $1.02 billion at December 31, 1996, 1997 and 1998,
respectively. Additionally, the Company opened additional Auto Finance Centers
during the years ended December 31, 1998, December 31, 1997, and December 31,
1996.
 
     Income Taxes. The Company files federal and certain state tax returns as
part of a consolidated group. Tax liabilities from the consolidated returns are
allocated in accordance with a tax sharing agreement based on the relative
income or loss of each entity on a stand-alone basis. The effective tax rate for
Onyx was 41.5% in 1998 and 43.0% in 1997. The reduction in tax rates between
1998 and 1997 is due to lower tax rates in the states where the Company has
opened new Auto Finance Centers. The Company's effective tax rate in 1996 was
12.2% as the Company had net operating loss carry-forwards that were utilized to
reduce income tax expense.
 
FINANCIAL CONDITION
 
  CONTRACTS HELD FOR SALE
 
     Contracts held for sale totaled $152.8 million at December 31, 1998,
compared to $64.3 million at December 31, 1997. The number and principal balance
of Contracts held for sale is largely dependent upon the timing and size of the
Company's securitizations. The increase in the Contracts held for sale from year
end 1997 to year end 1998 is primarily attributable to the Company's higher
contract volume during the respective warehousing periods. The Company believes
that the allowance for credit losses is currently adequate to absorb potential
losses in the owned portfolio. The allowance for credit losses as of December
31, 1998, was approximately $1.0 million. See Note 5 to the Company's
Consolidated Financial Statements for Contracts held for sale and allowance for
credit losses.
 
  CREDIT ENHANCEMENT ASSETS
 
     Credit enhancement assets consisted of the following:
 
<TABLE>
<CAPTION>
                                                      AS OF DECEMBER 31,
                                                 -----------------------------
                                                    1997              1998
                                                 -----------      ------------
<S>                                              <C>              <C>
Trust receivable...............................  $ 7,377,801      $  3,712,501
RISA...........................................   64,357,850       109,240,692
                                                 -----------      ------------
          Total................................  $71,735,651      $112,953,193
                                                 ===========      ============
</TABLE>
 
     Investment in trust receivables represent servicer advances and initial
deposits in spread accounts.
 
     RISA consists of the estimated present value of future servicing cash flows
from related securitizations. Future servicing cash flows are computed by taking
into account certain assumptions principally regarding prepayments, losses and
servicing costs. These cash flows are then discounted until they are released by
the spread account and received by the Company at a market-based rate. The
balance is then amortized against actual servicing fee income on a monthly
basis. The following table provides historical data regarding the RISA. Included
in RISA is restricted cash of $32.7 million and $23.5 million for the years
ended December 31, 1998 and 1997 respectively.
 
                                       23
<PAGE>   26
 
                    RETAINED INTEREST IN SECURITIZED ASSETS
 
<TABLE>
<CAPTION>
                                                 FOR THE YEARS ENDED DECEMBER 31,
                                                 --------------------------------
                                                    1997                  1998
                                                 ----------            ----------
                                                      (DOLLARS IN THOUSANDS)
<S>                                              <C>                   <C>
Beginning balance..............................   $ 33,530              $ 64,358
Additions......................................     41,603                80,633
Amortization...................................    (10,775)              (35,750)
                                                  --------              --------
Ending balance.................................   $ 64,358              $109,241
                                                  ========              ========
</TABLE>
 
  ASSET QUALITY
 
     The Company monitors and attempts to minimize delinquencies and losses
through timely collections and the use of a predictive dialing system. At
December 31, 1998, delinquencies represented 2.83% of the amount of Contracts in
its servicing portfolio compared to 2.51% at December 31, 1997, and 2.03% at
December 31, 1996. Net charge-offs as a percentage of the average servicing
portfolio were 1.72% for the year ended December 31, 1998, compared to 2.03% and
1.63% for the years ended December 31, 1997, and 1996, respectively. The levels
of delinquencies at December 31, 1998, increased over December 31, 1997,
primarily due to the relocation of the collection and customer service areas in
conjunction with the relocation of the corporate headquarters in December of
1998. The increase in delinquency from 1996 to 1997 is attributable in part to
an increase on a national basis in the level of bankruptcies and consumer
defaults generally, and the tendency of delinquencies and losses with respect to
a pool of automobile loans to increase after a period of seasoning. Loan losses
however have decreased from 1997 to 1998, and the management of the Company
believes that this is a result of the elimination of significant portion of the
portfolio of high delinquency and high loss Contracts purchased through the
third quarter of 1996 by the Company's North Hollywood Auto Finance Center. The
North Hollywood Auto Finance Center had a higher concentration of used car
dealerships than the Company's other Auto Finance Centers, and this
concentration of used car dealerships was principally responsible for the poor
performance of the portion of the Company's portfolio. The runoff of these loans
impacted losses through December 1997.
 
     Management has increased its off balance sheet reserves as a percentage of
the average serviced portfolio sold. Reserves have increased from 2.73% at
December 31, 1996, to 3.68% at December 31, 1997, to 4.31% at December 31, 1998.
Off balance sheet reserves are those reserves established upon the sale of
Contracts to the grantor and owner trusts in connection with securitized
Contracts.
 
               DELINQUENCY EXPERIENCE OF THE SERVICING PORTFOLIO
 
<TABLE>
<CAPTION>
                                             FOR THE YEARS ENDED DECEMBER 31,
                                            ----------------------------------
                                              1996        1997         1998
                                            --------    --------    ----------
                                                  (DOLLARS IN THOUSANDS)
<S>                                         <C>         <C>         <C>
Servicing portfolio.......................  $400,665    $757,277    $1,345,961
Delinquencies(1)(2) 30-59 days............     5,022      11,902        26,410
60-89 days................................     1,816       3,370         6,876
90+ days..................................     1,279       3,743         4,790
          Total delinquencies as a percent
            of servicing portfolio........      2.03%       2.51%         2.83%
</TABLE>
 
- ---------------
(1) Delinquencies include principal amounts only, net of repossessed inventory.
 
(2) The period of delinquency is based on the number of days payments are
    contractually past due.
 
                                       24
<PAGE>   27
 
                LOAN LOSS EXPERIENCE OF THE SERVICING PORTFOLIO
 
<TABLE>
<CAPTION>
                                                             FOR THE YEARS ENDED DECEMBER 31,
                                                            ----------------------------------
                                                              1996        1997         1998
                                                            --------    --------    ----------
                                                                  (DOLLARS IN THOUSANDS)
<S>                                                         <C>         <C>         <C>
Number of contracts.....................................      38,275      73,502       131,862
Period end servicing portfolio..........................    $400,665    $757,277    $1,345,961
Average servicing portfolio(1)..........................    $311,340    $563,343    $1,023,237
Number of gross charge-offs.............................         987       2,161         3,761
Gross charge-offs.......................................    $  5,789    $ 13,076    $   20,640
Net charge-offs(2)......................................    $  5,066    $ 11,434    $   17,618
Net charge-offs as a percent of average servicing
  portfolio.............................................        1.63%       2.03%         1.72%
On and off balance sheet reserves as a percent of period
  end serviced portfolio................................        2.12%       3.32%         3.90%
</TABLE>
 
- ---------------
(1) Average is based on daily balances.
 
(2) Net charge-offs are gross charge-offs minus recoveries on Contracts
    previously charged off.
 
                                       25
<PAGE>   28
 
     The following table illustrates the monthly performance of each of the
securitized pools outstanding for the period from the date of securitization
through December 31, 1998.
 
<TABLE>
<CAPTION>
          MONTH             96-1    96-2    96-3    96-4    97-1    97-2    97-3    97-4    98-1    98-A    98-B    98-C
          -----             ----    ----    ----    ----    ----    ----    ----    ----    ----    ----    ----    ----
<S>                         <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
1.........................  0.00%   0.01%   0.00%   0.00%   0.00%   0.00%   0.00%   0.00%   0.00%   0.00%   0.00%   0.00%
2.........................  0.03%   0.07%   0.02%   0.02%   0.00%   0.00%   0.00%   0.00%   0.01%   0.01%   0.00%   0.02%
3.........................  0.05%   0.20%   0.07%   0.05%   0.03%   0.02%   0.02%   0.01%   0.02%   0.03%   0.02%
4.........................  0.11%   0.33%   0.16%   0.14%   0.06%   0.07%   0.09%   0.04%   0.08%   0.07%   0.08%
5.........................  0.23%   0.46%   0.43%   0.24%   0.13%   0.22%   0.13%   0.11%   0.14%   0.14%
6.........................  0.40%   0.78%   0.54%   0.38%   0.26%   0.32%   0.24%   0.20%   0.24%   0.23%
7.........................  0.69%   0.98%   0.74%   0.53%   0.37%   0.59%   0.36%   0.28%   0.40%   0.37%
8.........................  0.82%   1.15%   0.97%   0.81%   0.52%   0.80%   0.47%   0.43%   0.53%
9.........................  0.93%   1.39%   1.13%   0.98%   0.60%   0.91%   0.62%   0.55%   0.68%
10........................  1.15%   1.52%   1.32%   1.18%   0.76%   1.07%   0.73%   0.72%   0.85%
11........................  1.25%   1.69%   1.47%   1.43%   0.92%   1.26%   0.81%   0.87%
12........................  1.47%   1.94%   1.60%   1.63%   1.02%   1.42%   0.94%   0.95%
13........................  1.65%   2.08%   1.77%   1.73%   1.13%   1.58%   1.10%   1.08%
14........................  1.79%   2.34%   1.94%   1.87%   1.23%   1.68%   1.23%
15........................  2.02%   2.52%   2.09%   2.07%   1.40%   1.80%   1.38%
16........................  2.25%   2.76%   2.27%   2.23%   1.56%   1.97%   1.58%
17........................  2.43%   2.89%   2.42%   2.33%   1.68%   2.10%
18........................  2.59%   3.10%   2.57%   2.49%   1.75%   2.23%
19........................  2.77%   3.14%   2.70%   2.62%   1.85%   2.35%
20........................  2.93%   3.30%   2.83%   2.73%   1.92%
21........................  3.06%   3.47%   2.94%   2.84%   1.98%
22........................  3.15%   3.60%   3.00%   2.93%   2.09%
23........................  3.21%   3.70%   3.08%   3.02%
24........................  3.28%   3.81%   3.17%   3.10%
25........................  3.40%   3.93%   3.28%   3.22%
26........................  3.43%   4.06%   3.38%
27........................  3.55%   4.13%   3.43%
28........................  3.60%   4.22%   3.54%
29........................  3.73%   4.23%
30........................  3.75%   4.29%
31........................  3.79%   4.31%
32........................  3.85%   4.33%
33........................  3.88%
34........................  3.90%
35........................  3.94%
36........................  3.94%
</TABLE>
 
LIQUIDITY AND CAPITAL RESOURCES
 
     The Company requires substantial cash and capital resources to operate its
business. Its primary uses of cash include: (i) acquisition of Contracts; (ii)
payment of dealer participation; (iii) securitization costs, including cash held
in spread accounts; (iv) settlements of hedging transactions; (v) maintenance of
working capital requirements and payment of operating expenses; and (vi)
interest expense. The capital resources available to the Company include: (i)
net interest income during the warehousing period; (ii) contractual servicing
fees; (iii) excess servicing cash flows released from spread accounts; (iv)
settlements of hedging transactions; (v) sales of Contracts in securitizations;
and (vi) borrowings under its Credit Facilities. These sources can provide
capital to fund expansion of the Company's Contract purchasing and servicing
capabilities.
 
     The principal determinant of cash usage in a particular year is the
difference between the dollar amount of Contracts purchased and the proceeds
from sale of Contracts. In 1998, $112 million more Contracts were purchased than
sold vs. a $79 million difference in 1997, resulting in net cash used in
operating activities. In
 
                                       26
<PAGE>   29
 
1996, proceeds from sale of Contracts exceeded contract purchases by $85
million, resulting in net cash provided by operating activities.
 
     Cash used in investing activities increased to $3.8 million in the year
ended December 31, 1998, from $1.8 million and $804,587 in the years ended
December 31, 1997, and 1996 respectively. The increases resulted from higher
capital expenditures by the Company, principally in the purchase of furniture
and equipment, in connection with the Company's continued expansion.
 
     Cash provided by financing activities was $118.4 million for the year ended
December 31, 1998, compared to $77.2 million provided and $90.5 million used for
the years ended December 31, 1997, and 1996 respectively. This increase over
1997 was primarily due to the issuance of subordinated debt, and additional
borrowing under revolving credit facilities. In 1996, the Company used excess
proceeds from sale of Contracts to paydown warehouse lines, resulting in net
cash used in financing activities.
 
     The Company's wholly-owned special purpose subsidiary, OAFC, is party to a
$375 million auto loan warehouse program (the "CP Facility") with Triple-A One
Funding Corporation ("Triple-A"). Triple-A is a commercial paper asset-backed
conduit lender sponsored by MBIA and is currently rated A-1/P1 by Standard &
Poor's Ratings Group, a division of The McGraw Hill Companies Inc., and Moody's
Investors Service, Inc., respectively (such ratings are not recommendations to
invest and are subject to change). This facility provides funds to purchase
Contracts. The advance rate to OAFC was increased during 1998 to 98% from 95% of
adjusted eligible principal balance of each Contract. The advance rate is
subject to reduction by MBIA if the net yield on OAFC's Contract portfolio falls
below a target net yield. The remaining 2% of the purchase price of the
Contracts generally is funded either from net interest income earned by OAFC or
by proceeds from the Revolving Facility or the Residual Lines described below.
Since the CP Facility is commercial paper based, the Company has the ability to
manage its interest rate exposure during the warehouse period between
origination and securitization by determining the maturities (one to 270 days)
of its commercial paper borrowings.
 
     Upon the occurrence of a wind-down event (as defined in the CP Facility
documents), no further borrowings by OAFC from Triple-A will be permitted and
all collections on the Contracts included in the borrowing base are distributed
in substantially the same manner as before the wind-down event except that all
outstanding Triple-A advances must be repaid before any amounts can be paid to
other borrowers or OAFC. Unless earlier terminated upon the occurrence of a
wind-down event, the CP Facility matures in September 2001, subject to the
requirement that the liquidity facility provided by certain banks to Triple-A be
extended annually. After maturity in September 2001, the CP Facility is subject
to annual renewals upon mutual consent of the parties.
 
     Additionally, the Company has a collateralized revolving line of credit
with a lending group (the "Revolving Facility"). The facility maximum at
December 31, 1998, was $45 million compared to $30 million at December 31, 1997.
The Revolving Facility is used for working capital and other expenditures for
which the Company's $375 million CP Facility is not otherwise available. Under
the Revolving Facility, the Company may (subject to borrowing base availability)
borrow and repay during the two-year revolving period up to $45 million based on
a collateral-based formula. The interest rate is based on the lender's Prime
rate. The Company's obligations under the Revolving Facility are collateralized
by a blanket lien on the Company's assets. The Revolving Facility contains
affirmative, negative and financial covenants and other provisions typical of
such credit facilities. The Revolving Facility converts unless renewed by mutual
consent from revolving loans to fully amortizing two-year term loans on June 28,
1999, or, if earlier, upon the occurrence of certain "Credit Triggers."
 
     The $100 million Merrill Line provides funding for the expansion of the
purchase or origination of Contracts and is used in concert with the CP Facility
the Company currently has in place. The interest rate is based on LIBOR. The
Merrill Line has a term of one year and currently matures in February 2000.
 
     The Residual Lines are used by the Company to finance operating
requirements. The amounts available for borrowing under each line are determined
using a collateral based formula which uses a percentage of the value of excess
cash flow to be received from certain securitizations, and, with respect to the
MLMCI facility,
 
                                       27
<PAGE>   30
 
a percentage of the amount of the Merrill Line outstanding on a quarterly basis.
The interest rates are based on LIBOR and the Residual Lines have a term of one
year. The facility provided by MLMCI matures in February 2000; the facility
provided by SBRC matures in September 1999.
 
     As of December 31, 1998, the Company has subordinated debt outstanding of
$10 million. The term of the subordinated debt is for two years ending February
24, 2000, with an option by the Company to extend the term by three years during
which the loan would fully amortize. The debt bears a fixed interest rate of
9 1/2%. The Company also issued to the lender a warrant for Common Stock in the
amount of 180,529 shares of the Company's Common Stock.
 
SECURITIZATIONS
 
     The Company has a securitization program that involves selling interests in
pools of its Contracts to investors through the issuance of AAA/Aaa rated
asset-backed securities. The Company believes that its experience in
securitizations coupled with the quality of Contracts acquired and the Company's
management information systems are instrumental in the Company successfully
completing 14 AAA/Aaa rated publicly underwritten securitizations since October
1994. The Company successfully completed four AAA/Aaa rated publicly
underwritten securitizations in 1998 totaling $911.8 million compared to four
securitizations totaling $527.2 million in 1997 and four securitizations
totaling $405.5 million in 1996.
 
     In the first quarter of 1999, the Company securitized contracts in the
amount of $310 million.
 
     These ongoing periodic securitizations are an integral part of the
Company's business plan because they allow the Company to increase its
liquidity, provide for redeployment of its capital and reduce risks associated
with interest rate fluctuations. The net proceeds of these securitizations are
generally used to pay down outstanding loans under the CP Facility and Merrill
Line, thereby creating availability for the acquisition of additional Contracts.
In each of its securitizations, the Company sells its Contracts from OAFC to a
newly formed grantor or owner trust. The trust in turn issues interest-bearing
notes and/or certificates to investors in an amount equal to the aggregate
principal balance of the Contracts. Purchasers of the notes and/or certificates
backed by Contracts receive a fixed rate of interest established at the time of
the sale. The Company retains the servicing and receives a 1% servicing fee.
 
INTEREST RATE EXPOSURE AND HEDGING
 
     The Company is able through the use of varying maturities on advances from
the CP Facility to lock in rates during the warehousing period, when in
management's judgment it is appropriate, to limit interest rate exposure during
such warehousing period (See "Risk Factors -- Interest Rate Risk").
 
     The Company has the ability to move rates upward in response to rising
borrowing costs because the Company currently does not originate loans near the
maximum rates permitted by law. Further, the Company employs a hedging strategy
which primarily consists of the execution of forward interest rate swaps. These
hedges are entered into by the Company in numbers and amounts which generally
correspond to the anticipated principal amount of the related securitization.
Gains and losses relative to these hedges are recognized in full at the time of
securitization as an adjustment to the gain on sale of the Contracts. The
Company has only used counterparties with investment grade debt ratings from
national rating agencies for its hedging transactions.
 
     Management monitors the Company's hedging activities on a frequent basis to
ensure that the value of hedges, their correlation to the Contracts being hedged
and the amounts being hedged continue to provide effective protection against
interest rate risk. The Company's hedging strategy requires estimates by
management of monthly Contract acquisition volume and timing of its
securitizations. If such estimates are materially inaccurate, then the Company's
gain on sales of Contracts and results of operations and cash flows could be
adversely affected. The amount and timing of hedging transactions are determined
by senior management based upon the amount of Contracts purchased and the
interest rate environment. Senior management currently expects to hedge
substantially all of its Contracts pending securitization.
 
                                       28
<PAGE>   31
 
NEW ACCOUNTING PRONOUNCEMENTS
 
     In June 1998, the FASB issued Statement of Financial Accounting Standards
No. 133, "Accounting for Derivative Instruments and Hedging Activities" ("SFAS
133"). SFAS 133 establishes accounting and reporting standards for derivative
contracts, and for hedging activities. The new standard requires that all
derivatives be recognized as either assets or liabilities in the consolidated
statements of financial condition and that those instruments be measured at fair
value. If certain conditions are met, a derivative may be specifically
designated as a hedging instrument. The accounting for changes in the fair value
of a derivative (that is, unrealized gains and losses) depends on the intended
use of the derivative and the resulting designation. The statement is effective
in the first quarter of year 2000. The Company is presently assessing the effect
of SFAS 133 on the consolidated financial statements of the Company.
 
YEAR 2000 COMPLIANCE
 
     The Company is substantially dependent on its and third party computer
systems, business applications and other information technology systems ("IT
systems"), due to the nature of its consumer finance business and the increasing
number of electronic transactions in the industry. Historically, many IT systems
were developed to recognize the year as a two-digit number, with the digits "00"
being recognized as the year 1900. The year 2000 presents a number of potential
problems for such systems, including potentially significant processing errors
or failure. Given the Company's reliance on its computer systems, the Company's
results of operations and cash flows could be materially adversely affected by
any significant errors or failures.
 
     The Company has developed and is in the midst of executing a comprehensive
plan designed to address the "Year 2000" issue for its in house and third party
IT applications. Earlier this year, the Company completed a detailed risk
assessment of its various in house and third party computer systems, business
applications and other affected systems, formulated a plan for specific
remediation efforts and began certain of such remediation efforts. The Company
assembled survey data from third party vendors and certain other parties with
which the Company communicates electronically to determine the compliance
efforts being undertaken by these parties and to assess the Company's potential
exposure to any non-compliant systems operated by these parties. During the
first half of 1999, the Company expects to continue and complete its remediation
efforts and to undertake internal testing of its in house and third party
systems and applications.
 
     The Company currently estimates that its costs related to Year 2000
compliance remediation for Company-owned IT systems and applications will be
approximately $450,000 in 1999. The amount expected to be expended during 1999
represents approximately 9% of the Company's IT budget. As of December 31, 1998,
the Company had expended approximately $300,000 for remediation of its IT
software systems and applications. By the second quarter of 1999, the Company
expects to undergo third party review of its Year 2000 remediation efforts. This
third party review will include an assessment of the procedures undertaken by
the Company as well as a computer software test of selected portions of the
Company's computer code. The Company currently expects that its Year 2000
remediation efforts will be completed during the third quarter of 1999. The
Company expenses Year 2000 remediation costs as incurred. The Company believes
that it has an effective plan in place to resolve the Year 2000 issue in a
timely manner. As noted above, the Company has not yet completed all necessary
processes of its Year 2000 plan. The Company plans to continuously monitor the
status of completion of its Year 2000 plan and, based on such information, will
develop contingency plans as necessary.
 
     In the event that the Company does not complete any additional phases of
its plan, the Company may be unable to perform its key operating activities,
such as the purchase of loans and the invoicing, collecting and application of
obligor repayments. The Company could be subject to litigation for computer
systems failure, such as improper application of repayments and resulting
incorrect credit reporting to credit bureaus. In addition, disruptions in the
economy generally resulting from Year 2000 issues could also materially
adversely affect the Company. The amount of potential liability and lost revenue
cannot reasonably be estimated at this time.
 
                                       29
<PAGE>   32
 
FORWARD LOOKING INFORMATION
 
     The preceding Management's Discussion and Analysis of the Company's
Financial Condition and Results of Operations contain certain "forward-looking
statements" within the meaning of the Private Securities Litigation Reform Act
of 1995, which can be identified by the use of forward-looking terminology such
as "may," "will," "expect," "anticipate," "estimate," "should" or "continue" or
the negative thereof or other variations thereon or comparable terminology. The
matters set forth in this Annual Report on Form 10-K constitute cautionary
statements identifying important factors with respect to such forward-looking
statements, including certain risks and uncertainties, that could cause actual
results to differ materially from those in such forward-looking statements.
 
ITEM 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
 
     Because the Company's funding strategy is dependent upon the issuance of
interest-bearing securities and the incurrence of debt, fluctuations in interest
rates impact the Company's profitability. As a result, the Company employs
various hedging strategies to limit certain risks of interest rate fluctuations.
See "Management's Discussion and Analysis -- Interest Rate Exposure and Hedging"
and "Risk Factors -- We are Subject to Interest Rate Fluctuations" and Note 5 to
the Company's Consolidated Financial Statements for additional information
regarding such market risks.
 
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
     The Company's financial statements, as listed under Item 14, appear in a
separate section of this Annual Report on Form 10-K beginning on page F-1.
 
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
        FINANCIAL DISCLOSURE
 
     None.
 
                                    PART III
 
ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
 
     Information regarding the directors and officers of the Company is
incorporated herein by reference to the descriptions set forth under the caption
"Election of Directors" and "Management" in the Proxy Statement for the Annual
Meeting of Stockholders currently expected to be held May 27, 1999 (the "1999
Proxy Statement").
 
                                       30
<PAGE>   33
 
ITEM 11. EXECUTIVE COMPENSATION
 
     Information regarding executive compensation is incorporated herein by
reference to the descriptions set forth under the caption "Executive
Compensation" in the 1999 Proxy Statement.
 
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
     Information regarding security ownership of certain beneficial owners and
management of the Company is incorporated herein by reference to the information
set forth under the caption "Security Ownership of Certain Beneficial Owners and
Management" in the 1999 Proxy Statement.
 
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
     Information regarding certain relationships and related transactions with
the Company is incorporated herein by reference to the information set forth
under the caption "Certain Transactions" in the 1999 Proxy Statement.
 
                                    PART IV
 
ITEM 14. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K
 
(a)(1) FINANCIAL STATEMENTS:
 
     The Company's financial statements appear in a separate section of this
Annual Report on Form 10-K beginning on the pages referenced below:
 
<TABLE>
<CAPTION>
                                                                      PAGE
                                                                      ----
        <S>                                                           <C>
        Report of Independent Accountants...........................  F-1
        Consolidated Statements of Financial Condition as of
          December 31, 1998 and 1997................................  F-2
        Consolidated Statements of Income for the years ended
          December 31, 1998, 1997
          and 1996..................................................  F-3
        Consolidated Statements of Redeemable Preferred Stock and
          Stockholders' Equity for the years ended December 31,
          1998, 1997 and 1996.......................................  F-4
        Consolidated Statements of Cash Flows for the years ended
          December 31, 1998, 1997
          and 1996..................................................  F-5
        Notes to Consolidated Financial Statements..................  F-6
</TABLE>
 
(a) EXHIBITS
 
     The following Exhibits are attached hereto and incorporated herein by
reference.
 
<TABLE>
    <C>           <S>
            *3.1  Omitted
            *3.2  Omitted
            *3.3  Omitted
            *3.4  Certificate of Incorporation of the Company.
            *3.5  Bylaws of the Company.
            *3.6  Omitted
            *4.1  Omitted
            +4.2  Rights Agreement dated as of July 8, 1997, between the
                  Company and American Stock Transfer and Trust Company, as
                  Rights Agent (which includes the form of Certificate of
                  Designation for the Series A Participating Preferred Stock
                  and the form of Rights Certificate of the Company.
                                                  *10.1 through 10.91 Omitted.
         **10.92  Form of Pooling and Servicing Agreement between Onyx
                  Acceptance Financial Corporation, Onyx Acceptance
                  Corporation and Bankers Trust Company in connection with
                  1997-1 Grantor Trust.
</TABLE>
 
                                       31
<PAGE>   34
<TABLE>
    <C>           <S>
         **10.93  Form of Underwriting Agreement between Onyx Acceptance
                  Financial Corporation and Merrill Lynch, Pierce, Fenner and
                  Smith Incorporated in connection with 1997-1 Grantor Trust.
          #10.94  Form of Pooling and Servicing Agreement between Onyx
                  Acceptance Financial Corporation, Onyx Acceptance
                  Corporation and Bankers Trust Company in connection with
                  1997-2 Grantor Trust.
          #10.95  Form of Underwriting Agreement between Onyx Acceptance
                  Financial Corporation and Merrill Lynch, Pierce, Fenner and
                  Smith Incorporated in connection with 1997-2 Grantor Trust.
         ##10.96  Form of Pooling and Servicing Agreement between Onyx
                  Acceptance Financial Corporation, Onyx Acceptance
                  Corporation and Bankers Trust Company in connection with
                  1997-3 Grantor Trust.
         ##10.97  Form of Underwriting Agreement between Onyx Acceptance
                  Financial Corporation and Merrill Lynch Pierce, Fenner and
                  Smith Incorporation in connection with 1997-3 Grantor Trust.
        ###10.98  1997-4 Spread Account Trust Agreement between Onyx
                  Acceptance Financial Corporation and Bankers Trust
                  (Delaware) Dated as of December 12, 1997.
        ###10.99  Form of Pooling Servicing Agreement between Onyx Acceptance
                  Corporation, Onyx Acceptance Financial Corporation, and
                  Bankers Trust Company in connection with the 1997-4 Onyx
                  Acceptance Grantor Trust.
       ###10.100  Form of Underwriting Agreement between Onyx Acceptance
                  Financial Corporation, Onyx Acceptance Corporation and
                  Merrill Lynch & Co. in connection with the 1997-4 Onyx
                  Acceptance Grantor Trust.
        ++10.101  Term Loan Agreement by and between Bay View Capital
                  Corporation and Onyx Acceptance Corporation Dated February
                  24, 1998.
        ++10.102  Master Repurchase Agreement Annex by and between Merrill
                  Lynch Mortgage Capital Inc. and Onyx Acceptance Funding
                  Corporation dated February 4, 1998.
        ++10.103  Master Assignment Agreement by and between Merrill Lynch
                  Mortgage Capital Inc. and Onyx Acceptance Funding
                  Corporation dated February 4, 1998.
       +++10.104  Amended and Restated Residual Interest In Securitized Assets
                  Revolving Credit Agreement Dated June 12, 1998 by and among
                  Onyx Acceptance Corporation, State Street Bank and Trust
                  Company, BankBoston and The Travelers Insurance Company.
       +++10.105  Amended and Restated Pledge and Security Agreement Dated
                  June 12, 1998 by and among Onyx Acceptance Corporation,
                  State Street Bank and Trust Company, BankBoston and The
                  Travelers Insurance Company.
      ++++10.106  Amended and Restated Sale and Servicing Agreement between
                  Onyx Acceptance Corporation and Onyx Acceptance Financial
                  Corporation dated as of September 4, 1998.
      ++++10.107  Amended and Restated Triple-A One Funding Corporation Credit
                  Agreement between and among Onyx Acceptance Financial
                  Corporation, Triple-A One Funding Corporation, CapMAC
                  Financial Services, Inc. and Capital Markets Assurance
                  Corporation dated as of September 4, 1998.
      ++++10.108  Amended and Restated Triple-A One Funding Corporation
                  Security Agreement between and among Onyx Acceptance
                  Financial Corporation, Triple-A One Funding Corporation and
                  Capital Markets Assurance Corporation dated as of September
                  4, 1998.
      ++++10.109  Amended and Restated Subordinated Security Agreement between
                  Onyx Acceptance Corporation and Onyx Acceptance Financial
                  Corporation dated as of September 4, 1998.
      ++++10.110  Amended and Restated Insurance and Indemnity Agreement
                  between and among Onyx Acceptance Corporation, Capital
                  Markets Assurance Corporation, Onyx Acceptance Financial
                  Corporation and Triple-A One Funding Corporation dated as of
                  September 4, 1998.
     ++++ 10.111  Master Loan Agreement Between Onyx Acceptance Funding
                  Corporation and Salomon Brothers Realty Corp. Dated
                  September 3, 1998.
</TABLE>
 
                                       32
<PAGE>   35
<TABLE>
    <C>           <S>
      ####10.112  Form of Pooling and Servicing Agreement between Onyx
                  Acceptance Corporation, Onyx Acceptance Financial
                  Corporation, and Bankers Trust Company in connection with
                  the 1998-1 Onyx Acceptance Grantor Trust.
      ####10.113  Form of Underwriting Agreement between Onyx Acceptance
                  Financial Corporation, Onyx Acceptance Corporation and
                  Merrill Lynch & Co. in connection with the 1998-1 Onyx
                  Acceptance Grantor Trust.
     #####10.114  Form of Sale and Servicing Agreement between Onyx Acceptance
                  Corporation, Onyx Acceptance Financial Corporation, and
                  Chase Manhattan Bank in connection with the Onyx Acceptance
                  Owner Trust 1998-A.
     #####10.115  Form of Sale and Servicing Agreement between Onyx Acceptance
                  Corporation, Onyx Acceptance Financial Corporation, and
                  Chase Manhattan Bank in connection with the Onyx Acceptance
                  Owner Trust 1998-B.
     #####10.116  Form of Sale and Servicing Agreement between Onyx Acceptance
                  Corporation, Onyx Acceptance Financial Corporation, and
                  Chase Manhattan Bank in connection with the Onyx Acceptance
                  Owner Trust 1998-C.
          10.117  Amendment Number One Dated December 22, 1998 to Amended and
                  Restated Onyx Warehouse Facility and Assignment and
                  Assumption Agreement.
            21.1  Subsidiaries of the Registrant.
            23.1  Consent of Independent Accountants
            27.1  Financial Data Schedule
</TABLE>
 
- ---------------
        * Incorporated by reference from the Company's Registration Statement on
          Form S-1 (Registration No. 333-680).
 
       ** Incorporated by reference from the Company's Registration Statement on
          Form S-1 (Registration No. 333-22301).
 
        # Incorporated by reference from the Company's Registration Statement on
          Form S-1 (Registration No. 333-28893).
 
      ## Incorporated by reference from the Company's Registration Statement on
         Form S-1 (Registration No. 333-33471).
 
        + Incorporated by reference from the Company's Current Report on Form
          8-K dated July 8, 1997.
 
    ### Incorporated by reference from the Company's Registration Statement on
        Form S-1 (Registration No. 333-40089).
 
      ++ Incorporated by reference from the Company's Form 10-Q for quarterly
         period ended March 31, 1998.
 
    +++ Incorporated by reference from the Company's Form 10-Q for quarterly
        period ended June 30, 1998.
 
  ++++ Incorporated by reference from the Company's Form 10-Q for quarterly
       period ended September 30, 1998.
 
  #### Incorporated by reference from the Company's Registration Statement on
       Form S-3 (Registration No. 333-46359).
 
 ##### Incorporated by reference from the Company's Registration Statement on
       Form S-3 (Registration No. 333-51239).
 
(a)(3) FINANCIAL STATEMENT SCHEDULES
 
     None.
 
(b)    EXHIBITS ON FORM 8-K
 
                                       33
<PAGE>   36
 
                                   SIGNATURES
 
     Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this Annual Report on Form
10-K to be signed on its behalf by the undersigned, thereunto duly authorized.
 
                                          ONYX ACCEPTANCE CORPORATION
 
                                          By:       /s/ JOHN W. HALL
                                            ------------------------------------
                                                        John W. Hall
                                               President and Chief Executive
                                                           Officer
                                               (Principal Executive Officer)
 
                                          By:       /s/ DON P. DUFFY
                                            ------------------------------------
                                                        Don P. Duffy
                                                Executive Vice President and
                                                  Chief Financial Officer
                                            (Principal Financial and Accounting
                                                           Officer)
 
     Pursuant to the requirements of the Securities Exchange Act of 1934, this
Annual Report on Form 10-K has been signed by the following persons on behalf of
the Registrant in the capacities and on the date indicated.
 
<TABLE>
<CAPTION>
                       SIGNATURE                                      TITLE                   DATE
                       ---------                                      -----                   ----
<S>                                                       <C>                            <C>
 
                 /s/ THOMAS C. STICKEL                      Chairman of the Board of     March 30, 1999
- --------------------------------------------------------            Directors
                   Thomas C. Stickel
 
                    /s/ JOHN W. HALL                       President, Chief Executive    March 30, 1999
- --------------------------------------------------------      Officer and Director
                      John W. Hall
 
                  /s/ BRUCE R. HALLETT                              Director             March 30, 1999
- --------------------------------------------------------
                    Bruce R. Hallett
 
                   /s/ ROBERT A. HOFF                               Director             March 30, 1999
- --------------------------------------------------------
                     Robert A. Hoff
 
                 /s/ G. BRADFORD JONES                              Director             March 30, 1999
- --------------------------------------------------------
                   G. Bradford Jones
 
                  /s/ C. THOMAS MEYERS                              Director             March 30, 1999
- --------------------------------------------------------
                    C. Thomas Meyers
 
                    /s/ DON P. DUFFY                      Executive Vice President and   March 30, 1999
- --------------------------------------------------------    Chief Financial Officer,
                      Don P. Duffy                                  Director
</TABLE>
 
                                       34
<PAGE>   37
 
                          ONYX ACCEPTANCE CORPORATION
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
                                    CONTENTS
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
Report of Independent Accountants...........................   F-1
Consolidated Statements of Financial Condition as of
  December 31, 1998 and 1997................................   F-2
Consolidated Statements of Income for the years ended
  December 31, 1998, 1997 and 1996..........................   F-3
Consolidated Statements of Redeemable Preferred Stock and
  Stockholders' Equity for the years ended December 31,
  1998, 1997 and 1996.......................................   F-4
Consolidated Statements of Cash Flows for the years ended
  December 31, 1998, 1997 and 1996..........................   F-5
Notes to Consolidated Financial Statements..................   F-6
</TABLE>
 
                                       35
<PAGE>   38
 
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
Board of Directors and Stockholders
Onyx Acceptance Corporation
 
     In our opinion, the accompanying consolidated statements of financial
condition and the related consolidated statements of income, redeemable
preferred stock and stockholders' equity and cash flows present fairly, in all
material respects, the consolidated financial position of Onyx Acceptance
Corporation and its subsidiaries (the "Company") as of December 31, 1998 and
1997, and the consolidated results of its operations and its cash flows for each
of the three years in the period ended December 31, 1998, in conformity with
generally accepted accounting principles. These consolidated financial
statements are the responsibility of the Company's management; our
responsibility is to express an opinion on these consolidated financial
statements based on our audits. We conducted our audits of these consolidated
financial statements in accordance with generally accepted auditing standards,
which require that we plan and perform the audit to obtain reasonable assurance
about whether the consolidated financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the consolidated financial statements, assessing
the accounting principles used and significant estimates made by management, and
evaluating the overall consolidated financial statement presentation. We believe
that our audits provide a reasonable basis for the opinion expressed above.
 
     As discussed in Note 2, the 1997 and 1996 consolidated financial statements
have been restated to reflect a change in the method of measuring and accounting
for credit enhancement assets.
 
PricewaterhouseCoopers LLP
Newport Beach, California
 
January 22, 1999
 
                                       F-1
<PAGE>   39
 
                  ONYX ACCEPTANCE CORPORATION AND SUBSIDIARIES
 
                 CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                      DECEMBER 31,
                                                              ----------------------------
                                                                  1998            1997
                                                              ------------    ------------
                                                                               (RESTATED)
<S>                                                           <C>             <C>
Cash and cash equivalents...................................  $  1,928,991    $    991,010
Contracts held for sale (net of allowance)..................   152,760,781      64,342,309
Credit enhancement assets (net of amortization).............   112,953,193      71,735,651
Furniture and equipment (net of accumulated depreciation)...     4,734,857       2,842,520
Other assets................................................     3,043,902       1,924,970
                                                              ------------    ------------
          Total Assets......................................  $275,421,724    $141,836,460
                                                              ============    ============
 
                                       LIABILITIES
Accounts payable............................................  $ 10,959,913    $  6,564,446
Warehouse borrowings........................................   150,044,464      60,505,902
Revolving credit and residual lines.........................    49,555,597      30,000,000
Subordinated debt...........................................    10,000,000               0
Capital lease obligations...................................       696,995       1,002,307
Accrued interest payable....................................       790,055         302,238
Other liabilities...........................................     9,550,979       5,744,157
                                                              ------------    ------------
          Total Liabilities.................................   231,598,003     104,119,050
Commitments and Contingencies
 
                                   STOCKHOLDERS' EQUITY
Common Stock
  Par value $0.01 per share; authorized 15,000,000 shares;
     issued and outstanding 6,171,034 as of December 31,
     1998 and issued and outstanding 6,017,635 shares as of
     December 31, 1997......................................        61,710          60,176
  Additional Paid in Capital................................    37,839,151      37,810,158
  Retained Earnings (Deficit)...............................     5,922,860        (152,924)
                                                              ------------    ------------
     Total Equity...........................................    43,823,721      37,717,410
                                                              ------------    ------------
          Total Liabilities and Stockholders' Equity........  $275,421,724    $141,836,460
                                                              ============    ============
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       F-2
<PAGE>   40
 
                  ONYX ACCEPTANCE CORPORATION AND SUBSIDIARIES
 
                       CONSOLIDATED STATEMENTS OF INCOME
 
<TABLE>
<CAPTION>
                                                           FOR THE YEAR ENDED DECEMBER 31,
                                                      -----------------------------------------
                                                         1998           1997           1996
                                                      -----------    -----------    -----------
                                                                     (RESTATED)     (RESTATED)
<S>                                                   <C>            <C>            <C>
REVENUES:
  Finance income....................................  $20,753,734    $11,866,957    $ 9,354,271
  Investment income.................................    1,194,477        431,373        325,885
                                                      -----------    -----------    -----------
INTEREST INCOME -- TOTAL............................   21,948,211     12,298,330      9,680,156
  Interest expense..................................   14,636,534      7,261,645      5,539,850
                                                      -----------    -----------    -----------
NET INTEREST INCOME.................................    7,311,677      5,036,685      4,140,306
  Servicing fee income..............................   16,663,450      9,189,108      3,235,512
  Gain on sale of contracts.........................   36,417,216     19,586,291     15,251,117
                                                      -----------    -----------    -----------
TOTAL REVENUES......................................   60,392,343     33,812,084     22,626,935
                                                      -----------    -----------    -----------
 
EXPENSES:
  Provision for credit losses.......................    1,579,831        785,445        265,802
  Salaries and benefits.............................   26,754,000     17,424,729      8,547,815
  Occupancy.........................................    1,823,290      1,478,349        662,634
  Depreciation......................................    2,105,743      1,194,186        821,354
  General and administrative expenses...............   17,743,525     10,643,087      5,362,382
                                                      -----------    -----------    -----------
TOTAL EXPENSES......................................   50,006,389     31,525,796     15,659,987
                                                      -----------    -----------    -----------
NET INCOME BEFORE INCOME TAXES......................   10,385,954      2,286,288      6,966,948
  Income taxes......................................    4,310,170        984,017        851,360
                                                      -----------    -----------    -----------
NET INCOME..........................................  $ 6,075,784    $ 1,302,271    $ 6,115,588
                                                      ===========    ===========    ===========
NET INCOME PER SHARE OF COMMON STOCK
  Basic.............................................  $      0.99    $      0.22    $      1.19
  Diluted...........................................  $      0.95    $      0.21    $      1.09
                                                      ===========    ===========    ===========
Basic shares outstanding............................    6,112,370      6,000,431      5,159,182
                                                      ===========    ===========    ===========
Diluted shares outstanding..........................    6,424,959      6,294,071      5,585,647
                                                      ===========    ===========    ===========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       F-3
<PAGE>   41
 
                  ONYX ACCEPTANCE CORPORATION AND SUBSIDIARIES
 
 CONSOLIDATED STATEMENTS OF REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>
                             MANDATORILY
                         REDEEMABLE SERIES A                             SERIES B PREFERRED
                           PREFERRED STOCK            COMMON STOCK             STOCK          ADDITIONAL     RETAINED
                       ------------------------    -------------------   ------------------     PAID IN      EARNINGS
                         SHARES       AMOUNT        SHARES     AMOUNT     SHARES    AMOUNT      CAPITAL      (DEFICIT)
                       ----------   -----------    ---------   -------   --------   -------   -----------   -----------
<S>                    <C>          <C>            <C>         <C>       <C>        <C>       <C>           <C>
BALANCE AT DECEMBER
  31, 1995...........   8,227,349   $ 9,379,177    2,241,454   $22,415    136,365   $ 1,364   $   803,109   $(8,722,613)
Issuance of Common
  Stock..............                              2,908,135    29,081                         32,307,821
Conversion of
  Preferred Stock
  Series.............  (8,227,349)   (9,379,177)     715,422     7,154                          8,220,195     1,151,830
Conversion of
  Preferred Stock
  Series B...........                                 39,757       398   (136,365)   (1,364)          966
Issuance costs.......                                                                          (3,578,366)
Net income...........                                                                                         6,115,588
                       ----------   -----------    ---------   -------   --------   -------   -----------   -----------
BALANCE AT DECEMBER
  31, 1996
  (RESTATED).........           0             0    5,904,768    59,048          0         0    37,753,725    (1,455,195)
Issuance of Common
  Stock..............                                112,867     1,128                             56,433
Net Income...........                                                                                         1,302,271
                       ----------   -----------    ---------   -------   --------   -------   -----------   -----------
BALANCE AT DECEMBER
  31, 1997
  (RESTATED).........           0             0    6,017,635    60,176          0         0    37,810,158      (152,924)
Issuance of Common
  Stock..............                                153,399     1,534                             28,993
Net Income...........                                                                                         6,075,784
                       ----------   -----------    ---------   -------   --------   -------   -----------   -----------
BALANCE AT DECEMBER
  31, 1998...........           0   $         0    6,171,034   $61,710          0   $     0   $37,839,151   $ 5,922,860
                       ==========   ===========    =========   =======   ========   =======   ===========   ===========
 
<CAPTION>
 
                           TOTAL
                       STOCKHOLDERS'
                          EQUITY
                         (DEFICIT)
                       -------------
<S>                    <C>
BALANCE AT DECEMBER
  31, 1995...........   $(7,895,725)
Issuance of Common
  Stock..............    32,336,902
Conversion of
  Preferred Stock
  Series.............     9,379,179
Conversion of
  Preferred Stock
  Series B...........
Issuance costs.......    (3,578,366)
Net income...........     6,115,588
                        -----------
BALANCE AT DECEMBER
  31, 1996
  (RESTATED).........    36,357,578
Issuance of Common
  Stock..............        57,561
Net Income...........     1,302,271
                        -----------
BALANCE AT DECEMBER
  31, 1997
  (RESTATED).........    37,717,410
Issuance of Common
  Stock..............        30,527
Net Income...........     6,075,784
                        -----------
BALANCE AT DECEMBER
  31, 1998...........   $43,823,721
                        ===========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       F-4
<PAGE>   42
 
                  ONYX ACCEPTANCE CORPORATION AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                                      FOR THE YEAR ENDED DECEMBER 31,
                                                              -----------------------------------------------
                                                                   1998             1997            1996
                                                              ---------------   -------------   -------------
                                                                                 (RESTATED)      (RESTATED)
<S>                                                           <C>               <C>             <C>
OPERATING ACTIVITIES
  Net Income................................................  $     6,075,784   $   1,302,271   $   6,115,588
     Adjustments to reconcile net income to net cash
       provided by (used in) operating activities:
       Amortization of retained interest in securitized
          assets............................................       35,749,891      10,775,171       7,110,583
       Write-off unamortized participation on sold loans....       27,467,086      15,523,390      12,582,515
       Provision for credit losses..........................        1,579,831         785,446         265,802
       Depreciation and amortization........................        2,105,743       1,194,186         821,354
       Decrease (increase)in trust receivable...............        3,665,300      (3,763,661)      2,594,477
       Increase in retained interest in securitized
          assets............................................      (80,632,733)    (41,603,001)    (34,459,085)
       (Increase) decrease in other assets..................       (1,118,928)        521,949      (1,471,078)
       Increase in accounts payable.........................        4,395,467       4,896,659       1,380,268
       Increase (decrease) in accrued interest payable......          487,817         229,077      (1,244,356)
       Increase in other liabilities........................        4,057,894       3,245,629       1,766,591
       Proceeds from the sale of contracts held for sale....      926,759,606     527,276,091     405,513,000
       Purchase of contracts held for sale..................   (1,038,534,757)   (605,905,410)   (319,840,214)
       Exercise of trust purchase option....................      (12,387,783)              0               0
       Principal payments received on contracts held for
          sale..............................................       34,746,630      26,957,179      21,582,236
       Payments of participation to dealers (net of
          chargeback collections and amortized expense).....      (32,484,915)    (16,416,931)    (12,449,984)
                                                              ---------------   -------------   -------------
Cash provided by (used in) operating activities.............     (113,632,238)    (74,981,955)     90,267,697
INVESTING ACTIVITIES
  Purchase of furniture and equipment.......................       (3,835,335)     (1,824,853)       (804,587)
                                                              ---------------   -------------   -------------
Cash used in investing activities...........................       (3,835,335)     (1,824,853)       (804,587)
FINANCING ACTIVITIES
  Payments on capital leases................................         (468,060)       (425,189)       (486,369)
  Proceeds from warehouse line..............................      985,997,562     538,897,511     273,228,073
  Payments on warehouse line................................     (896,459,000)   (488,500,000)   (375,500,000)
  Proceeds from drawdown on revolving credit borrowings.....       32,000,000      27,500,000      16,348,568
  Payments to paydown revolving credit borrowings...........      (12,444,403)              0     (23,417,776)
  Proceeds (payments) of subordinated debt..................       10,000,000               0     (10,000,000)
  Payments of stock issuance costs..........................                0               0      (1,595,837)
  Proceeds from exercise of options/warrants................           30,527          57,561          17,250
  Proceeds from sale of preferred and common stock..........                0               0      30,337,128
  (Payments) receipts in other loans........................         (251,072)       (335,093)        586,168
                                                              ---------------   -------------   -------------
Cash provided by (used in) financing activities.............      118,405,554      77,194,790     (90,482,795)
                                                              ---------------   -------------   -------------
Increase (decrease) in cash and cash equivalents............          937,981         387,982      (1,019,685)
Cash and cash equivalents at beginning of period............          991,010         603,028       1,622,713
                                                              ---------------   -------------   -------------
Cash and cash equivalents at end of period..................  $     1,928,991   $     991,010   $     603,028
                                                              ===============   =============   =============
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
  Noncash activities:
     Additions to capital leases............................  $       162,744   $     884,654   $     471,256
     Conversion of preferred stock..........................                0               0       9,379,177
  Cash paid:
     Interest...............................................  $    14,148,717   $   7,032,567   $   6,784,204
     Income taxes...........................................  $     1,377,644   $     602,913   $     570,676
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       F-5
<PAGE>   43
 
                  ONYX ACCEPTANCE CORPORATION AND SUBSIDIARIES
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
NOTE 1 -- NATURE OF OPERATIONS
 
     Onyx Acceptance Corporation ("Onyx") was incorporated on August 17, 1993,
and commenced operations in February 1994. Onyx and its wholly owned special
purpose finance subsidiaries Onyx Acceptance Financial Corporation ("OAFC") and
Onyx Acceptance Funding Corporation ("OFC") (collectively, the "Company")
specialize in the purchase, origination, sale and servicing of retail automobile
installment loans ("Loans" or "Contracts") originated by automobile dealers. The
Company provides an independent source to automobile dealers to finance their
customers' purchases of new and used vehicles. The Company attempts to meet the
needs of dealers through consistent buying practices, competitive rates, a
dedicated customer service staff, fast turnaround time and systems designed to
expedite the processing of loan applications.
 
NOTE 2 -- RESTATEMENT
 
     As required by the Financial Accounting Standards Board's ("FASB") Special
Report, "A Guide to Implementation of Statement 125 on Accounting for Transfers
and Servicing of Financial Assets and Extinguishments of Liabilities, Second
Edition," dated December 1998, and related guidance set forth in statements made
by the staff of the Securities and Exchange Commission ("SEC") on December 8,
1998, the Company's 1997 and 1996 consolidated financial statements have been
restated to reflect a change in the method of measuring and accounting for
credit enhancement assets on its securitization transactions to the cash-out
method from the cash-in method.
 
     Initial deposits to restricted cash accounts, if any, and subsequent cash
flows received by securitization trusts sponsored by the Company accumulate as
credit enhancement assets until certain targeted levels are achieved, after
which cash is distributed to the Company on an unrestricted basis. Under the
cash-in method previously used by the Company, (i) the assumed discount period
for measuring the present value of credit enhancement assets ended when cash
flows were received by the securitization trusts and (ii) initial deposits to
restricted cash accounts were recorded at face value. Under the cash-out method
now required by the FASB and SEC, the assumed discount period for measuring the
present value of credit enhancement assets ends when cash, including return of
the initial deposits, if any, is distributed to the Company on an unrestricted
basis.
 
     The change to the cash-out method results only in a difference in the
timing of revenue recognition from a securitization and has no effect on the
total cash flow of such transactions. While the total amount of revenue
recognized over the term of a securitization transaction is the same under
either method, the cash-out method results in (i) lower initial gain on the sale
of receivables due to the longer discount period and (ii) higher subsequent
servicing fee income from accretion of the additional cash-out discount.
Accordingly, the reductions in previously reported earnings resulting from
retroactive application of the change will generally be recognized in subsequent
period earnings and servicing fee income.
 
                                       F-6
<PAGE>   44
 
     The restatement resulted in the following changes to prior period financial
statements:
 
<TABLE>
<CAPTION>
                                                              YEARS ENDED
                                                              DECEMBER 31,
                                                         ----------------------
                                                           1997          1996
                                                         --------      --------
                                                         (IN THOUSANDS, EXCEPT
                                                          FOR PER SHARE DATA)
                                                         ----------------------
<S>                                                      <C>           <C>
TOTAL REVENUE:
Previous...............................................  $35,950       $25,221
As restated............................................  $33,812       $22,627
NET INCOME:
Previous...............................................  $ 2,584       $ 7,672
As restated............................................  $ 1,302       $ 6,116
NET INCOME PER SHARE:
BASIC:
Previous...............................................  $  0.43       $  1.49
As restated............................................  $  0.22       $  1.19
DILUTED:
Previous...............................................  $  0.40       $  1.35
As restated............................................  $  0.21       $  1.09
CREDIT ENHANCEMENT ASSETS:
Previous...............................................  $76,467       $39,738
As restated............................................  $71,736       $37,144
STOCKHOLDERS' EQUITY:
Previous...............................................  $40,555       $37,914
As restated............................................  $37,717       $36,358
</TABLE>
 
NOTE 3 -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     Principles of Consolidation: The accompanying consolidated financial
statements include the accounts of Onyx, OAFC and OFC. All significant
intercompany accounts and transactions have been eliminated upon consolidation.
 
     Cash and Cash Equivalents: The Company considers all significant
investments with maturity at acquisition of three months or less to be cash
equivalents.
 
     Contracts Held for Sale: Contracts held for sale are stated at the lower of
aggregate amortized cost or market. Market is determined based on the estimated
value of the Contracts if securitized and sold.
 
     The Company defers certain Contract origination fees and participation paid
to dealers. The net amount is amortized as an adjustment to the related
Contract's yield, on the same basis as that used to record income on the
Contracts, over the contractual life of the related Loans. At the time of sale
any remaining amounts are included as part of the computation of the gain on
sale of Contracts.
 
     The Company continues to accrue interest on Contracts until the Contract is
charged off, which occurs at the earlier of the end of the month in which (i)
the underlying vehicle is repossessed and sold or (ii) the Contract becomes past
due 120 days. At the time that the Contract is charged off, all accrued interest
is also charged off.
 
     Allowance for Credit Losses: The allowance for credit losses is maintained
at a level believed adequate by management to absorb potential losses in the
Contracts held for sale. The provision rate is established by management using
the following criteria: past Loan loss experience, current economic conditions,
volume, growth and other relevant factors, and is re-evaluated on a quarterly
basis. The allowance is increased by provisions for Loan losses charged against
income. All recoveries on finance receivables previously charged off are
credited to the allowance, while charge-off's of finance receivables are
deducted from the allowance.
 
                                       F-7
<PAGE>   45
 
     Sales of Contracts: The Company purchases contracts to be sold to investors
with servicing rights retained by the Company. The Company sells a majority of
its contracts and does not retain any residual interest in securitized or sold
Contracts. Contracts are sold at or near par value with the Company retaining a
participation in the future cash flows released by Trusts in Contracts
securitized but on cash sales no participation is retained in the future cash
flows. As of December 31, 1998 the Company is servicing all the Contracts sold
to the Trusts.
 
     Furniture and Equipment: Furniture and equipment are stated at cost less
accumulated depreciation and are depreciated for financial reporting purposes on
a straight-line basis over a three year estimated life. Capitalized leased
assets are amortized over the lease term. Leasehold improvements are amortized
over a period not exceeding the term of the lease.
 
     Interest and Fee Income: Interest and fee income on Contracts held for sale
is determined on a monthly basis using either the simple interest (level yield)
method or the sum-of-the-months digits method which approximates the effective
yield method.
 
     Income Taxes: The Company utilizes Statement of Financial Accounting
Standards No. 109, "Accounting for Income Taxes," which requires the recognition
of deferred tax liabilities and assets for the expected future tax consequences
of events that have been included in the financial statements or tax returns.
Under this method, deferred tax liabilities and assets are determined based on
the difference between the financial statements and the tax basis of assets and
liabilities using enacted tax rates in effect for the year in which the
differences are expected to reverse. Valuation allowances are established, when
necessary, to reduce deferred tax assets to the amount expected to be realized.
The provision for income taxes represents the tax payable for the period and the
change during the year in deferred tax assets and liabilities. The Company files
consolidated federal and state tax returns.
 
     Net Income Per Share: Net income per share are presented in a dual format,
computed both including and excluding the impact of potential common stock.
 
     Derivative Financial Instruments: The Company employs hedging strategies to
manage its gross interest rate risk. The hedging strategies include the use of
forward swap agreements to manage the interest rate on securitization of the
Contracts held for sale.
 
     The forward swap agreements are entered into by the Company in numbers and
amounts which generally correspond to the principal amount of future
securitization transactions. The market value of these forward agreements
responds inversely to the market value change of the underlying Contracts.
Because of this inverse relationship, the Company can effectively lock in its
gross interest rate spread at the time the hedge transaction is entered into.
Gains and losses relative to these agreements are deferred and recognized in
full at the time of securitization as an adjustment to the gain on sale of
contracts. The Company is not required to maintain any collateral with respect
to its hedging strategies. The Company only uses highly rated counterparties.
Credit exposure is limited to those transactions with a positive fair value.
 
     Pervasiveness of Estimates: The preparation of the consolidated financial
statements in conformity with generally accepted accounting principles requires
management to make estimates and assumptions that affect the reported amounts of
assets and liabilities and disclosure of contingent assets and liabilities at
the date of the consolidated financial statements and the reported amounts of
revenues and expenses during the reporting period. Actual results could differ
from those estimates.
 
     Stock-based Compensation: Accounting for Stock-Based Compensation ("SFAS
123"), was issued by the Financial Accounting Standards Board in October 1995
and is effective for fiscal years beginning after December 15, 1995. SFAS 123
encourages, but does not require companies to recognize compensation expense
associated with stock based compensation plans over the anticipated service
period based on the fair value of the award on the date of grant. As allowed by
SFAS 123, however, the Company has elected to continue to measure compensation
costs as prescribed by APB Opinion No. 25 "Accounting for Stock Issued to
Employees." See footnote 12 for Pro Forma disclosures of net income and net
income per share, as if SFAS 123 had been adopted.
 
                                       F-8
<PAGE>   46
 
     Reclassification: Certain amounts in the prior year consolidated financial
statements have been reclassified to conform to 1998 presentation.
 
NOTE 4 -- RECENT ACCOUNTING PRONOUNCEMENTS
 
     In June 1998, the FASB issued Statement of Financial Accounting Standards
No. 133, "Accounting for Derivative Instruments and Hedging Activities" ("SFAS
133"). SFAS 133 establishes accounting and reporting standards for derivative
contracts, and for hedging activities. The new standard requires that all
derivatives be recognized as either assets or liabilities in the consolidated
statements of financial condition and that those instruments be measured at fair
value. If certain conditions are met, a derivative may be specifically
designated as a hedging instrument. The accounting for changes in the fair value
of a derivative (that is, unrealized gains and losses) depends on the intended
use of the derivative and the resulting designation. The statement is effective
in the first quarter of year 2000. The Company is presently assessing the effect
of SFAS 133 on the consolidated financial statements of the Company.
 
NOTE 5 -- CONTRACTS HELD FOR SALE
 
     Contracts held for sale consist of the following:
 
<TABLE>
<CAPTION>
                                                          DECEMBER 31,
                                                   ---------------------------
                                                       1998           1997
                                                   ------------    -----------
<S>                                                <C>             <C>
Contracts held for sale..........................  $160,386,439    $71,216,278
Less unearned interest...........................     8,434,206      7,835,794
                                                   ------------    -----------
                                                    151,952,233     63,380,484
Allowance for credit losses......................    (1,052,178)      (316,902)
                                                   ------------    -----------
                                                    150,900,055     63,063,582
Dealer participation.............................     1,860,726      1,278,727
                                                   ------------    -----------
     Total.......................................  $152,760,781    $64,342,309
                                                   ============    ===========
</TABLE>
 
     At December 31, 1998, contractual maturities of Contracts held for sale
were as follows:
 
<TABLE>
<S>                              <C>
1999...........................  $  3,065,436
2000...........................     8,772,016
2001...........................     8,024,190
2002...........................    18,462,195
2003 and thereafter............   113,628,396
                                 ------------
                                 $151,952,233
                                 ============
</TABLE>
 
     Changes in the allowance for credit losses were as follows:
 
<TABLE>
<CAPTION>
                                                     DECEMBER 31,
                                         -------------------------------------
                                            1998          1997         1996
                                         -----------    ---------    ---------
<S>                                      <C>            <C>          <C>
Balance at beginning of period.........  $   316,902    $  61,190    $ 591,765
Provision for credit losses............    1,579,831      785,446      265,802
Charged-off loans......................   (1,100,158)    (620,781)    (953,582)
Recoveries.............................      255,603       91,047      157,205
                                         -----------    ---------    ---------
Balance at end of period...............  $ 1,052,178    $ 316,902    $  61,190
                                         ===========    =========    =========
</TABLE>
 
     The fair value of Contracts held for sale was $163.5 million and $64.3
million at December 31, 1998 and 1997, respectively.
 
     At December 31, 1998, the Company had entered into four year amortizing
forward swap agreements with a notional face amount outstanding of $150.0
million with maturities matching the average life of the Contracts being hedged.
At December 31, 1998, these contracts had a fair value of $93,000. In addition,
at December 31, 1998, the Company had offsetting swap agreements of $81.0
million in notional face amount
 
                                       F-9
<PAGE>   47
 
outstanding with a fair value of $(1.0) million. At December 31, 1997, the
Company had similar agreements with a notional face amount outstanding of $105.9
million with deferred losses of $232,000.
 
     Included in the Gain on Sale of Contracts for the years ended December 31,
1998, 1997 and 1996 are losses of $4.8 million, $1.3 million, and $2.3 million
respectively, arising from hedging activities.
 
     Contracts serviced by the Company for the benefit of others totaled
approximately $1.2 million at December 31, 1998 and $693.9 million at December
31, 1997. These amounts are not reflected in the accompanying consolidated
financial statements.
 
NOTE 6 -- CREDIT ENHANCEMENT ASSETS
 
     SFAS 125 requires that following a transfer of financial assets, an entity
is to recognize the assets it controls and the liabilities it has incurred, and
derecognize assets for which control has been surrendered and liabilities that
have been extinguished.
 
     Credit enhancement assets consisted of the following:
 
<TABLE>
<CAPTION>
                                                          DECEMBER 31,
                                                   ---------------------------
                                                       1998           1997
                                                   ------------    -----------
<S>                                                <C>             <C>
Trust receivable.................................  $  3,712,501    $ 7,377,801
RISA.............................................  $109,240,692    $64,357,850
                                                   ------------    -----------
          Total..................................  $112,953,193    $71,735,651
                                                   ============    ===========
</TABLE>
 
     Retained interest in securitized assets ("RISA") capitalized upon
securitization of contracts represent the present value of the estimated future
earnings to be received by the Company from the excess spread created in
securitization transactions. Excess spread is calculated by taking the
difference between the coupon rate of the contracts sold and the certificate
rate paid to the investors less contractually specified servicing and guarantor
fees and projected credit losses, after giving effect to estimated prepayments.
 
     Prepayment and credit loss assumptions are utilized to project future
earnings and are based on historical experience. Credit losses are estimated
using cumulative loss frequency and severity estimates by management. All
assumptions are evaluated each quarter and adjusted, if appropriate, to reflect
the actual performance of the contracts.
 
     Future earnings are discounted at a rate management believes to be
representative of market at the time of securitization. The balance of RISA is
amortized against actual excess spread income earned on a monthly basis over the
expected repayment life of the underlying contracts. RISA is classified in a
manner similar to available for sale securities and as such is marked to market
each quarter. Market value changes are calculated by discounting the remaining
projected excess spread using a current market discount rate. Any changes in the
market value of the RISA is reported as a separate component of shareholders'
equity as an unrealized gain or loss, net of deferred taxes. As of December 31,
1998 the market value of RISA approximated cost. The Company retains the rights
to service all contracts it securitizes.
 
     The following table presents the balances and activity for RISA:
 
<TABLE>
<CAPTION>
                                                          DECEMBER 31,
                                                  ----------------------------
                                                      1998            1997
                                                  ------------    ------------
<S>                                               <C>             <C>
Beginning Balance...............................  $ 64,357,850    $ 33,530,020
Additions.......................................    80,632,733      41,603,001
Amortization....................................   (35,749,891)    (10,775,171)
                                                  ------------    ------------
          Ending Balance........................  $109,240,692    $ 64,357,850
                                                  ============    ============
</TABLE>
 
     In initially valuing the RISA, the Company establishes an off balance sheet
allowance for expected future credit losses. The allowance is based upon
historical experience and management's estimate of future performance regarding
credit losses. The amount is reviewed periodically and adjustments are made if
actual experience or other factors indicate that future performance may differ
from management's prior estimates.
 
                                      F-10
<PAGE>   48
 
     The following table presents the estimated future undiscounted retained
interest earnings to be received from securitizations. Estimated future
undiscounted RISA earnings are calculated by taking the difference between the
coupon rate of the contracts sold and the certificate rate paid to the
investors, less the contractually specified servicing fee of 1.0% and guarantor
fees, after giving effect to estimated prepayments and assuming no losses. To
arrive at the RISA, this amount is reduced by the off balance sheet allowance
established for potential future losses and by discounting to present value.
 
<TABLE>
<CAPTION>
                                                             DECEMBER 31, 1998    DECEMBER 31, 1997
                                                             -----------------    -----------------
<S>                                                          <C>                  <C>
Estimated net undiscounted RISA earnings...................   $  176,600,869        $ 99,613,524
Off balance sheet allowance for losses.....................       51,009,542          25,546,412
Discount to present value..................................       16,350,635           9,709,262
                                                              --------------        ------------
Retained interest in securitized assets....................   $  109,240,692        $ 64,357,850
                                                              ==============        ============
Outstanding balance of contracts sold through
  securitizations..........................................   $1,183,157,096        $693,896,100
</TABLE>
 
NOTE 7 -- FURNITURE AND EQUIPMENT
 
     Furniture and equipment consisted of the following:
 
<TABLE>
<CAPTION>
                                                           DECEMBER 31,
                                                     -------------------------
                                                        1998           1997
                                                     -----------    ----------
<S>                                                  <C>            <C>
OWNED:
  Office furniture.................................  $ 2,031,561    $1,469,004
  Computer equipment...............................    5,869,612     2,397,728
  Leasehold improvements...........................      748,292       713,382
                                                     -----------    ----------
          Total....................................    8,649,465     4,580,114
                                                     -----------    ----------
CAPITALIZED LEASES:
  Office furniture.................................                     40,750
  Computer equipment...............................    1,441,073     1,471,594
                                                     -----------    ----------
     Total.........................................    1,441,073     1,512,344
                                                     -----------    ----------
Total furniture and equipment......................   10,090,538     6,092,458
Less: accumulated depreciation and amortization....    5,355,681     3,249,938
                                                     -----------    ----------
Furniture and equipment, net.......................  $ 4,734,857    $2,842,520
                                                     ===========    ==========
</TABLE>
 
NOTE 8 -- WAREHOUSE BORROWING
 
     The Company has a commercial paper facility (the "CP Facility") with a
financial institution with borrowings outstanding at December 31, 1998 of
$150,044,464 and at December 31, 1997 of $60,505,902. Under terms of the
agreements the Company is able to borrow 98% of the principal amount of loans
purchased. Borrowings under this commercial paper arrangement become due as the
principal payments are received or the related automobile loans are sold. The
amount of credit available to the Company for the purchase of automobile loans
under the facility is $375 million. The amount of commercial paper outstanding
at any time is collateralized by the Contracts held for sale. These credit
arrangements mature on September 3, 2001 and are subject to annual renewal on
each anniversary date. The Company is in compliance with certain ratios and
other borrowing covenants under the commercial paper arrangements. The fair
value of commercial paper was $150.0 million and $60.5 million at December 31,
1998 and 1997 respectively. The commercial paper facility had an average
interest rate of 6.47% for the year ended December 31, 1998, and 6.63% for the
year ended December 31, 1997.
 
     Additionally, during 1998 the Company entered into a repurchase facility
with Merrill Lynch (the "Merrill Line") providing $100 million of borrowing
capacity for the purchase or origination of Contracts. Outstanding debt is
collateralized by Contracts held for sale. As of December 31, 1998, there was no
debt outstanding under this line. This facility matures on February 4, 2000.
 
                                      F-11
<PAGE>   49
 
NOTE 9 -- REVOLVING CREDIT AND RESIDUAL LINES
 
     The Company has three credit lines collateralized by credit enhancement
assets. Total borrowings outstanding under all three lines at December 31, 1998
was $49.6 million and $30.0 million at December 31, 1997.
 
     The Company is party to a collateralized revolving line of credit with a
lending group for up to $45 million ("the Revolving Facility"). The Revolving
Facility is used for working capital and other expenditures for which the
Company's warehouse lines are otherwise unavailable. The Company may borrow and
repay the loan during the two year revolving period with the loan amount
determined by a borrowing base formula. The formula is a percentage of the
Company's credit enhancement asset balance. The Revolving Facility converts from
revolving loan to a fully amortizing two year term loans on June 30, 1999.
Advances bear interest at 0.25% over the lender's Prime Rate. The Revolving
Facility had an average interest rate of 8.76% for the year ended December 31,
1998 and 8.91% for 1997. The fair value of the Revolving Facility was $38.5
million at December 31, 1998 and $30.0 million at December 31, 1997. The Company
is in compliance with certain ratios and other borrowing covenants under the
Revolving Facility.
 
     Additionally, in the first quarter of 1998, the Company negotiated two new
credit lines with investment banks ("the Residual Lines") to expand and
diversify its lending relationships. The Residual Lines consist of two separate
$50 million funding facilities collateralized by credit enhancement assets, with
one facility provided by Merrill Lynch Mortgage Capital ("MLMCI") and the second
facility provided by Salomon Brothers Realty Company ("SBRC"). The lines utilize
a collateral based formula that equates borrowing availability to a percentage
of the value of the excess cash flow to be received from securitizations lead-
managed by the respective investment bank. The facility provided by MLMCI
matures in February 2000; the facility provided by SBRC matures in September
1999. Interest paid under each line is ties to the 30 day Libor Rate. The
average interest rates for year ending 1998 were 8.19% for the MLMCI facility
and 8.06% for the SBRC facility. The Residual Lines had a combined fair value of
$11.1 million at December 31, 1998, with debt outstanding under the MLMCI line
of $5.1 million and debt outstanding under the SBRC line of $6.0 million.
 
NOTE 10 -- SUBORDINATED DEBT
 
     The Company has a $10.0 million subordinated debt offering. The term of the
subordinated debt is for two years ending February 24, 2000 with an option by
the Company to extend the term by three years during which the loan would fully
amortize, and bears a fixed interest rate of 9  1/2%. The Company also issued to
the lender a warrant for Common Stock in the amount of $180,529 shares of the
Common Stock of the Company.
 
NOTE 11 -- COMMITMENTS AND CONTINGENCIES
 
     The Company leases furniture, fixtures and equipment under capital leases
with terms in excess of one year. The Company leases its office space under
operating leases with options to renew. Certain operating lease agreements
provide for escalations based on contractual provisions.
 
     Future minimum lease payments required under capital leases and
noncancelable operating leases are as follows as of December 31, 1998:
 
<TABLE>
<CAPTION>
                                                  CAPITAL LEASES    OPERATING LEASES
                                                  --------------    ----------------
<S>                                               <C>               <C>
1999............................................    $ 417,480         $ 2,218,267
2000............................................      210,447           2,617,143
2001............................................      120,703           2,474,213
2002............................................      102,739           2,265,161
2003 and thereafter.............................       15,608          12,100,769
                                                    ---------         -----------
          Total.................................      866,977         $21,675,553
Less amounts representing interest..............     (169,982)
                                                    ---------
Present value of net minimum lease payments.....    $ 696,995
                                                    =========
</TABLE>
 
                                      F-12
<PAGE>   50
 
     Rental expenses for premises and equipment amounted to approximately $1.7
million, $1.4 million and $651,898 for the year ended December 31, 1998, 1997,
and 1996 respectively.
 
NOTE 12 -- STOCK OPTIONS
 
     The Company has reserved 1,545,303 shares for future issuance to certain
employees under its incentive stock option plan. The options may be exercised at
prices ranging from $0.51 per share to $11.50 per share at any time, in whole or
part, within ten years after the date of grant. Reserved, unoptioned shares
totaled 240,566 at December 31, 1998, 185,176 at December 31, 1997, and 502,764
at December 31, 1996.
 
     A summary of the status of the Company's stock option plan as of December
31, 1998, 1997 and 1996, and changes during the years ending on those dates is
presented below:
 
<TABLE>
<CAPTION>
                                            1998                    1997                   1996
                                    ---------------------   --------------------   --------------------
                                                 WEIGHTED               WEIGHTED               WEIGHTED
                                                 AVERAGE                AVERAGE                AVERAGE
                                                 EXERCISE               EXERCISE               EXERCISE
             OPTIONS                  SHARES      PRICE      SHARES      PRICE      SHARES      PRICE
             -------                ----------   --------   ---------   --------   ---------   --------
<S>                                 <C>          <C>        <C>         <C>        <C>         <C>
Outstanding at beginning of
  year............................     802,200    $7.51       597,480    $6.10       373,811    $ 2.30
Granted...........................   1,296,878     6.32       402,700     7.89       394,593     11.14
Exercised.........................     (38,118)    0.80      (112,867)    0.51       (33,056)     0.51
Forfeited.........................    (940,263)    8.39       (85,113)    8.66      (137,868)    11.56
                                    ----------    -----     ---------    -----     ---------    ------
Outstanding at end of year........   1,120,697    $5.59       802,200    $7.51       597,480    $ 6.10
                                    ==========    =====     =========    =====     =========    ======
Options exercisable at year end...     502,624                321,564                342,866
                                    ==========              =========              =========
Weighted-average fair value of
  options granted during the
  year............................  $     6.32              $    7.89              $   11.14
                                    ==========              =========              =========
</TABLE>
 
     The following table summarizes information about stock options outstanding
at December 31, 1998:
 
<TABLE>
<CAPTION>
                                OPTIONS OUTSTANDING                       OPTIONS EXERCISABLE
                 -------------------------------------------------   ------------------------------
                   NUMBER      WEIGHTED-AVERAGE                        NUMBER
   RANGE OF      OUTSTANDING      REMAINING       WEIGHTED-AVERAGE   EXERCISABLE   WEIGHTED-AVERAGE
EXERCISE PRICES  AT 12/31/98   CONTRACTUAL LIFE    EXERCISE PRICE    AT 12/31/98    EXERCISE PRICE
- ---------------  -----------   ----------------   ----------------   -----------   ----------------
<S>              <C>           <C>                <C>                <C>           <C>
$ 0.51              114,399       5.26 years           $  .51          114,399          $  .51
$ 5.75 -  6.86      933,748             7.17             5.77          336,297            5.80
$ 7.25 -  8.50        2,550             7.97             8.25              680            8.37
$11.25 - 11.50       70,000             8.40            11.36           51,248           11.41
                  ---------       ----------           ------          -------          ------
$ 0.51 - 11.50    1,120,697             7.06           $ 5.59          502,624          $ 5.17
                  =========       ==========           ======          =======          ======
</TABLE>
 
     Substantially all of the options granted by the Company vest over a four
year period, 25% after one year and the remaining 75% ratably over the following
36 month period. All of the options are granted at the closing price on the date
of the grant.
 
     SFAS 123 provides for companies to recognize compensation expense
associated with stock based compensation plans over the anticipated service
period based on the fair value of the award on the date of grant. However, SFAS
123 allows companies to continue to measure compensation costs prescribed by APB
Opinion No. 25 "Accounting for Stock Issued to Employees" ("APB 25"). Companies
electing to continue accounting for stock based compensation plans under APB 25
must make pro forma disclosures of net income and net income per share, as if
SFAS 123 had been adopted. The company has continued to account for stock-
 
                                      F-13
<PAGE>   51
 
based compensation plans under APB 25. The fair value of the options was
estimated at date of grant using a Black-Scholes single option pricing model
using the following assumptions:
 
<TABLE>
<CAPTION>
                                                        DECEMBER 31,
                                           --------------------------------------
                                              1998          1997          1996
                                           ----------    ----------    ----------
<S>                                        <C>           <C>           <C>
Risk free interest rate..................         5.1%          5.5%          6.0%
Expected stock price volatility..........        63.9%         52.0%         80.0%
Expected life of options.................  four years    four years    four years
Expected dividends.......................        none          none          none
</TABLE>
 
     The following table presents the pro forma disclosures required for SFAS
123 for the years ended December 31:
 
<TABLE>
<CAPTION>
                                                     1998     1997      1996
                                                    ------    -----    ------
<S>                                                 <C>       <C>      <C>
Pro forma net income (dollars in thousands).......  $5,322    $ 895    $5,337
Pro forma net income per share-basic..............  $ 0.87    $0.15    $ 1.03
Pro forma net income per share-diluted............  $ 0.83    $0.14    $ 0.96
</TABLE>
 
NOTE 13 -- EMPLOYEE 401K DEFERRED SAVINGS PLAN
 
     The Company has established a salary deferral savings program pursuant to
IRS Code Section 401(k) (the "401(k) Plan") for qualified employees. Under this
plan, employees may contribute a percentage of their pre-tax earnings to the
401(k) Plan. Effective July 1, 1998, the Company amended the 401(k) Plan to
permit matching contributions. Employee contributions up to the lesser of
$10,000 or 6% of pre-tax earnings made after one year of service are matched by
a Company contribution equal to 50% of the employee's contribution. Matching
contributions are made in the Company's common stock and begin vesting 20% per
year following the completion of three years of service. Company expense related
to the 401(k) Plan totaled $87,000 in 1998.
 
NOTE 14 -- REDEEMABLE PREFERRED STOCK
 
     The Company has reserved 10 million shares of preferred stock and had
designated 9 million shares as Series A Preferred Stock. The shares were subject
to a $.06 per share dividend, payable quarterly when and if declared by the
Board of Directors. The dividends were not cumulative. The Series A Preferred
Stock was subject to holder redemption to be paid out of future earnings in
three annual installments beginning January 1, 1999 and each subsequent January
until January 1, 2001. The shares were subject to a 7% per year increase from
the issue date. The increase accrued at December 31 of each year. The Series A
Preferred Stock was converted to Common Stock at the time of the initial public
offering.
 
NOTE 15 -- STOCKHOLDER'S EQUITY
 
     The Company had designated 136,000 shares of preferred stock as Series B
Preferred Stock. The shares were subject to a $0.05 per share dividend payable
annually when, as and if declared by the Board of Directors. The dividends were
not cumulative. The Series B Preferred Stock was converted into Common Stock
upon the initial public offering.
 
     The Company's ability to pay or declare dividends is restricted by the
terms of the credit facilities.
 
                                      F-14
<PAGE>   52
 
NOTE 16 -- INCOME TAXES
 
     The following table presents the current and deferred provision (benefit)
for federal and state income taxes for the years ended December 31, 1998, 1997
and 1996:
 
<TABLE>
<CAPTION>
                                              1998         1997        1996
                                           ----------    --------    ---------
<S>                                        <C>           <C>         <C>
Current:
  Federal................................  $  698,132    $252,897    $ 591,278
  State..................................      17,744      69,332      (20,602)
                                           ----------    --------    ---------
          Total..........................     715,876     322,229      570,676
                                           ----------    --------    ---------
Deferred:
  Federal................................   3,070,600     460,648     (538,218)
  State..................................     523,694     201,140      818,902
                                           ----------    --------    ---------
          Total..........................   3,594,294     661,788      280,684
                                           ----------    --------    ---------
          Combined Total.................  $4,310,170    $984,017    $ 851,360
                                           ==========    ========    =========
</TABLE>
 
     The provision (benefit) for income taxes differs from the amount that would
result from applying the federal statutory rate as follows for the years ended
December 31, 1998, 1997 and 1996:
 
<TABLE>
<CAPTION>
                                                          1998    1997    1996
                                                          ----    ----    ----
<S>                                                       <C>     <C>     <C>
Statutory regular federal income tax rate (benefit).....   34%     34%     34%
State taxes (net of federal benefit)....................    7       8       8
Other...................................................    0       1       8
Change in valuation allowance...........................    0       0     (38)
                                                           --      --     ---
                                                           41%     43%     12%
                                                           ==      ==     ===
</TABLE>
 
     The components of the deferred income tax asset or (liability) as of
December 31, 1998 and 1997 are as follows:
 
<TABLE>
<CAPTION>
                                                      1998            1997
                                                  ------------    ------------
<S>                                               <C>             <C>
Property and equipment........................    $    855,656    $    696,006
Accrued liabilities...........................         408,438         380,900
Capitalized costs.............................        (675,204)       (559,986)
Allowance for credit losses...................         441,880         143,557
Gain on sale of Contracts.....................     (20,164,719)    (13,550,790)
Net operating losses..........................      14,055,868      11,584,583
Credit carryover..............................          18,211          18,211
State taxes...................................         525,415         347,358
                                                  ------------    ------------
                                                  $ (4,534,455)   $   (940,161)
                                                  ============    ============
</TABLE>
 
     At December 31, 1998, the Company had net operating loss carryforwards for
federal and state purposes of $35.2 million and $26.3 million, respectively. The
net operating loss carryforwards begin to expire after 2009 and 1999,
respectively.
 
                                      F-15
<PAGE>   53
 
NOTE 17 -- WARRANTS
 
     At December 31, 1998, the Company had the following warrants outstanding to
purchase shares of common stock:
 
<TABLE>
<CAPTION>
                                            BALANCE          NET         BALANCE          NET         BALANCE
                                          OUTSTANDING    REDUCTIONS    OUTSTANDING    REDUCTIONS    OUTSTANDING
                                               AT            TO             AT            TO             AT
                               EXERCISE   DECEMBER 31,   OUTSTANDING   DECEMBER 31,   OUTSTANDING   DECEMBER 31,
                                PRICE         1996        WARRANTS         1997        WARRANTS         1998
                               --------   ------------   -----------   ------------   -----------   ------------
<S>                            <C>        <C>            <C>           <C>            <C>           <C>
Warrants.....................   $ 0.03      116,922           0          116,922        115,286         1,636
Warrants.....................   $ 0.51       84,311           0           84,311              0        84,311
Warrants.....................   $11.50       16,332           0           16,332              0        16,332
Warrants.....................   $17.15        3,791           0            3,791              0         3,791
Warrants.....................   $ 8.88            0           0                0              0       180,529
                                            -------           --         -------        -------       -------
          Total..............               221,356           0          221,356        115,286       286,599
                                            =======           ==         =======        =======       =======
</TABLE>
 
     At December 31, 1998, all the Company's warrants outstanding to purchase
shares of common stock were exercisable.
 
     During the year ended December 31, 1998 warrants of 115,286 were exercised
at a price of $0.03. No warrants were exercised during 1997.
 
NOTE 18 -- NET INCOME PER SHARE
 
     In accordance with Statement of Financial Accounting Standards No. 128, the
following is an illustration of the dilutive effect of the Company's potential
common stock on net income per share.
 
<TABLE>
<CAPTION>
                                                       YEAR ENDED DECEMBER 31,
                                                   --------------------------------
                                                     1998        1997        1996
                                                   --------    --------    --------
                                                   (IN THOUSANDS, EXCEPT NET INCOME
                                                              PER SHARE)
<S>                                                <C>         <C>         <C>
Net income.......................................   $6,076      $1,302      $6,116
Weighted average shares outstanding..............    6,112       6,000       5,159
Net effect of dilutive stock options/warrants....      231         294         426
                                                    ------      ------      ------
Fully diluted weighted average shares
  outstanding....................................    6,425       6,294       5,585
                                                    ======      ======      ======
Net income Per Share.............................   $ 0.99      $ 0.22      $ 1.19
                                                    ======      ======      ======
Net income Per Share Assuming Full Dilution......   $ 0.95      $ 0.21      $ 1.09
                                                    ======      ======      ======
</TABLE>
 
NOTE 19 -- FAIR VALUE OF FINANCIAL INSTRUMENTS
 
     The estimated fair value of financial instruments have been determined by
the Company, using available market information and appropriate valuation
methodologies. However, considerable judgement is necessarily required in
interpreting market data to develop the estimates of fair value. Accordingly,
the estimates presented herein are not necessarily indicative of the amounts
that the Company could realize in a current market exchange. The use of
different market assumptions and/or estimation methodologies may have a material
effect on the estimated fair value amounts.
 
     The following methods and assumptions were used to estimate the fair value
of each class of financial instruments for which it is practicable to estimate
that value:
 
          Cash and Cash Equivalents: The carrying amount approximates fair value
     because of the short maturity of those investments.
 
                                      F-16
<PAGE>   54
 
          Warehouse borrowings and revolving credit lines: The fair value of the
     Company's debt is estimated based upon the quoted market prices for the
     same or similar issues or on the current rates offered to the Company for
     debt of the same remaining maturities and characteristics.
 
          Contracts held for sale: The fair value of Contracts held for sale is
     based on the estimated proceeds expected on securitization of the Contracts
     held for sale.
 
          Credit enhancement assets: The carrying amount is accounted for at an
     estimated fair value which is calculated by discounting the excess spread
     using a current market discount rate.
 
          Hedging. The fair value of the Company's outstanding forward
     agreements are estimated based on current rates offered to the Company for
     forward agreements with similar terms and conditions.
 
     The estimated fair values of the Company's financial instruments are as
follows at December 31:
 
<TABLE>
<CAPTION>
                                              1998                   1997
                                       -------------------    ------------------
                                       CARRYING     FAIR      CARRYING     FAIR
                                        AMOUNT      VALUE      AMOUNT     VALUE
                                       --------    -------    --------    ------
                                                     (IN MILLIONS)
<S>                                    <C>         <C>        <C>         <C>
Cash and cash equivalents............  $   1.9     $   1.9     $  0.9     $  0.9
Contracts held for sale..............  $ 152.8     $ 163.5     $ 64.3     $ 68.4
Credit enhancement assets............  $ 112.9     $ 112.9     $ 71.7     $ 71.7
Warehouse borrowings.................  $(150.0)    $(150.0)    $(60.5)    $(60.5)
Revolving credit and residual
  lines..............................  $ (49.6)    $ (49.6)    $(30.0)    $(30.0)
Hedging
Forward agreements...................  $  (1.2)    $  (0.9)       N/A     $ (1.1)
</TABLE>
 
NOTE 20 -- RELATED PARTIES
 
     The Company has a note receivable from a certain shareholder in the amount
of $175,000. The note bears interest at 6.66% per annum. Principal and accrued
interest are due on December 20, 1999.
 
                                      F-17
<PAGE>   55
 
NOTE 21 -- QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                      THREE MONTHS ENDED
                                                       ------------------------------------------------
                                                       MARCH 31(1)   JUNE 30(1)   SEPT. 30(1)   DEC. 31
                                                       -----------   ----------   -----------   -------
                                                                        (IN THOUSANDS)
<S>                                                    <C>           <C>          <C>           <C>
1998
  Interest income....................................    $4,481        $5,222       $7,001      $5,245
  Interest expense...................................     2,821         3,617        4,214       3,985
  Net interest income................................     1,660         1,605        2,787       1,260
  Provision for credit losses........................       307           325          598         350
  Income before income taxes.........................     1,269         1,872        2,996       4,249
  Income taxes.......................................       527           777        1,243       1,763
  Net income.........................................       742         1,095        1,753       2,486
  Net income per common share (Basic)................    $ 0.12        $ 0.18       $ 0.28      $ 0.40
  Net income per common share (Diluted)..............    $ 0.12        $ 0.17       $ 0.27      $ 0.39
1997(1)
  Interest income....................................    $1,882        $3,266       $3,660      $3,491
  Interest expense...................................     1,055         1,830        2,096       2,280
  Net interest income................................       827         1,435        1,564       1,211
  Provision for credit losses........................       293           211          100         181
  Income (Loss) before income taxes..................       348         1,510          899        (470)
  Income taxes.......................................       150           650          387        (202)
  Net income (Loss)..................................       198           860          512        (268)
  Net income (Loss) per common share (Basic).........    $ 0.03        $ 0.14       $ 0.09      $(0.04)
  Net income (Loss) per common share (Diluted).......    $ 0.03        $ 0.13       $ 0.08      $(0.04)
</TABLE>
 
- ---------------
(1) As discussed in Note 2, all quarters in 1997 and the first three quarters in
    1998 have been restated to reflect the change in method of measuring in
    accounting for credit enhancement assets. The amounts of net income and
    diluted net income per common share previously reported are discussed within
    the Company's Form 10-Q/As for the three months ending March 31, 1998, June
    30, 1998 and September 30, 1998.
 
NOTE 22 -- SUBSEQUENT EVENTS (UNAUDITED)
 
     In the first quarter of 1999, the Company securitized contracts totaling
$310.0 million.
 
                                      F-18
<PAGE>   56
 
                               INDEX TO EXHIBITS
 
<TABLE>
<CAPTION>
                                                                             SEQUENTIALLY
  EXHIBIT                                                                      NUMBERED
    NO.                                DESCRIPTION                               PAGE
- -----------                            -----------                           ------------
<C>            <S>                                                           <C>
     *3.1      Omitted.....................................................
     *3.2      Omitted.....................................................
     *3.3      Omitted.....................................................
     *3.4      Certificate of Incorporation of the Company.................
     *3.5      Bylaws of the Company.......................................
     *3.6      Omitted.....................................................
     *4.1      Omitted.....................................................
     +4.2      Rights Agreement dated as of July 8, 1997, between the
               Company and American Stock Transfer and Trust Company, as
               Rights Agent (which includes the form of Certificate of
               Designation for the Series A Participating Preferred Stock
               and the form of Rights Certificate of the Company...........
</TABLE>
 
        *10.1 through 10.91 Omitted.
 
<TABLE>
 
<C>            <S>                                                           <C>
   **10.92     Form of Pooling and Servicing Agreement between Onyx
               Acceptance Financial Corporation, Onyx Acceptance
               Corporation and Bankers Trust Company in connection with
               1997-1 Grantor Trust........................................
   **10.93     Form of Underwriting Agreement between Onyx Acceptance
               Financial Corporation and Merrill Lynch, Pierce, Fenner and
               Smith Incorporated in connection with 1997-1 Grantor
               Trust.......................................................
    #10.94     Form of Pooling and Servicing Agreement between Onyx
               Acceptance Financial Corporation, Onyx Acceptance
               Corporation and Bankers Trust Company in connection with
               1997-2 Grantor Trust........................................
    #10.95     Form of Underwriting Agreement between Onyx Acceptance
               Financial Corporation and Merrill Lynch, Pierce, Fenner and
               Smith Incorporated in connection with 1997-2 Grantor
               Trust.......................................................
   ##10.96     Form of Pooling and Servicing Agreement between Onyx
               Acceptance Financial Corporation, Onyx Acceptance
               Corporation and Bankers Trust Company in connection with
               1997-3 Grantor Trust........................................
   ##10.97     Form of Underwriting Agreement between Onyx Acceptance
               Financial Corporation and Merrill Lynch Pierce, Fenner and
               Smith Incorporation in connection with 1997-3 Grantor
               Trust.......................................................
  ###10.98     1997-4 Spread Account Trust Agreement between Onyx
               Acceptance Financial Corporation and Bankers Trust
               (Delaware) Dated as of December 12, 1997....................
  ###10.99     Form of Pooling Servicing Agreement between Onyx Acceptance
               Corporation, Onyx Acceptance Financial Corporation, and
               Bankers Trust Company in connection with the 1997-4 Onyx
               Acceptance Grantor Trust....................................
  ###10.100    Form of Underwriting Agreement between Onyx Acceptance
               Financial Corporation, Onyx Acceptance Corporation and
               Merrill Lynch & Co. in connection with the 1997-4 Onyx
               Acceptance Grantor Trust....................................
   ++10.101    Term Loan Agreement by and between Bay View Capital
               Corporation and Onyx Acceptance Corporation Dated February
               24, 1998....................................................
</TABLE>
<PAGE>   57
 
<TABLE>
 .102   ++10    Master Repurchase Agreement Annex by and between Merrill Lynch
               Mortgage Capital Inc. and Onyx Acceptance Funding Corporation dated
               February 4, 1998.
<C>            <S>                                                                  <C>
   ++10.103    Master Assignment Agreement by and between Merrill Lynch Mortgage
               Capital Inc. and Onyx Acceptance Funding Corporation dated February
               4, 1998........................................................
  +++10.104    Amended and Restated Residual Interest In Securitized Assets
               Revolving Credit Agreement Dated June 12, 1998 by and among Onyx
               Acceptance Corporation, State Street Bank and Trust Company,
               BankBoston and The Travelers Insurance Company.................
  +++10.105    Amended and Restated Pledge and Security Agreement Dated June 12,
               1998 by and among Onyx Acceptance Corporation, State Street Bank
               and Trust Company, BankBoston and The Travelers Insurance
               Company........................................................
 ++++10.106    Amended and Restated Sale and Servicing Agreement between Onyx
               Acceptance Corporation and Onyx Acceptance Financial Corporation
               dated as of September 4, 1998..................................
 ++++10.107    Amended and Restated Triple-A One Funding Corporation Credit
               Agreement between and among Onyx Acceptance Financial Corporation,
               Triple-A One Funding Corporation, CapMAC Financial Services, Inc.
               and Capital Markets Assurance Corporation dated as of September 4,
               1998...........................................................
 ++++10.108    Amended and Restated Triple-A One Funding Corporation Security
               Agreement between and among Onyx Acceptance Financial Corporation,
               Triple-A One Funding Corporation and Capital Markets Assurance
               Corporation dated as of September 4, 1998......................
 ++++10.109    Amended and Restated Subordinated Security Agreement between Onyx
               Acceptance Corporation and Onyx Acceptance Financial Corporation
               dated as of September 4, 1998..................................
 ++++10.110    Amended and Restated Insurance and Indemnity Agreement between and
               among Onyx Acceptance Corporation, Capital Markets Assurance
               Corporation, Onyx Acceptance Financial Corporation and Triple-A One
               Funding Corporation dated as of September 4, 1998..............
 ++++10.111    Master Loan Agreement Between Onyx Acceptance Funding Corporation
               and Salomon Brothers Realty Corp. Dated September 3, 1998......
 ####10.112    Form of Pooling and Servicing Agreement between Onyx Acceptance
               Corporation, Onyx Acceptance Financial Corporation, and Bankers
               Trust Company in connection with the 1998-1 Onyx Acceptance Grantor
               Trust..........................................................
 ####10.113    Form of Underwriting Agreement between Onyx Acceptance Financial
               Corporation, Onyx Acceptance Corporation and Merrill Lynch & Co. in
               connection with the 1998-1 Onyx Acceptance Grantor Trust.......
#####10.114    Form of Sale and Servicing Agreement between Onyx Acceptance
               Corporation, Onyx Acceptance Financial Corporation, and Chase
               Manhattan Bank in connection with the Onyx Acceptance Owner Trust
               1998-A.........................................................
#####10.115    Form of Sale and Servicing Agreement between Onyx Acceptance
               Corporation, Onyx Acceptance Financial Corporation, and Chase
               Manhattan Bank in connection with the Onyx Acceptance Owner Trust
               1998-B.........................................................
</TABLE>
<PAGE>   58
 
<TABLE>
 .116#####10    Form of Sale and Servicing Agreement between Onyx Acceptance
               Corporation, Onyx Acceptance Financial Corporation, and Chase
               Manhattan Bank in connection with the Onyx Acceptance Owner Trust
               1998-C.
<C>            <S>                                                                <C>
     10.117    Amendment Number One Dated December 22, 1998 to Amended and
               Restated Onyx Warehouse Facility and Assignment and Assumption
               Agreement......................................................
     21.1      Subsidiaries of the Registrant.................................
     23.1      Consent of Independent Accountants.............................
     27.1      Financial Data Schedule........................................
</TABLE>
 
        -----------------------
*             Incorporated by reference from the Company's Registration
              Statement on Form S-1 (Registration No. 333-680).
 
**            Incorporated by reference from the Company's Registration
              Statement on Form S-1 (Registration No. 333-22301).
 
+             Incorporated by reference from the Company's Current Report on
              Form 8-K dated July 8, 1997.
 
#             Incorporated by reference from the Company's Registration
              Statement on Form S-1 (Registration No. 333-28893).
 
##           Incorporated by reference from the Company's Registration Statement
             on Form S-1 (Registration No. 333-33471).
 
###         Incorporated by reference from the Company's Registration Statement
            on Form S-1 (Registration No.           ).
 
++           Incorporated by reference from the Company's Form 10-Q for
             quarterly period ended March 31, 1998.
 
+++         Incorporated by reference from the Company's Form 10-Q for quarterly
            period ended June 30, 1998.
 
++++       Incorporated by reference from the Company's Form 10-Q for quarterly
           period ended September 30, 1998.
 
####       Incorporated by reference from the Company's Registration Statement
           on Form S-3 (Registration No. 333-46359).
 
#####     Incorporated by reference from the Company's Registration Statement on
          Form S-3 (Registration No. 333-51239).

<PAGE>   1

                                                                  Exhibit 10.117


                              AMENDMENT NUMBER ONE
               TO THE AMENDED AND RESTATED ONYX WAREHOUSE FACILITY
                                       AND
                       ASSIGNMENT AND ASSUMPTION AGREEMENT





        This AMENDMENT NUMBER ONE TO THE AMENDED AND RESTATED ONYX WAREHOUSE
FACILITY AND ASSIGNMENT AND ASSUMPTION AGREEMENT (this "Amendment and
Assignment") is made as of December 22, 1998 by and among ONYX ACCEPTANCE
CORPORATION ("Onyx"), ONYX ACCEPTANCE FINANCIAL CORPORATION ("Finco"), TRIPLE-A
ONE FUNDING CORPORATION ("Triple-A One"), CAPITAL MARKETS ASSURANCE CORPORATION
("CapMAC"), CAPMAC FINANCIAL SERVICES, INC. ("CapFin"), MBIA INSURANCE
CORPORATION ("MBIA") and NATIONAL AUSTRALIA BANK LIMITED, New York Branch, as
Bank Agent for the Banks (the "Bank Agent").


                               W I T N E S S E T H


        WHEREAS, the parties hereto have entered into the Operative Documents;


        WHEREAS, pursuant to the Insurance Agreement CapMAC has issued a Note
Bond for the benefit of Triple-A One and a Liquidity Bond for the benefit of the
Bank Agent;


        WHEREAS, the parties hereto have agreed that MBIA, rather than CapMAC,
will hereafter provide credit support to Triple-A One and the Bank Agent;


        WHEREAS, MBIA will issue a financial guaranty insurance policy in favor
of Triple-A One substantially in the form of Exhibit A hereto (the "Note
Policy") and a financial guaranty insurance policy in favor of the Bank Agent
substantially in the form of Exhibit B hereto (the "Liquidity Policy") in
replacement of the Note Bond and the Liquidity Bond;


        WHEREAS, the parties hereto have agreed to amend the Operative Documents
in order to effect such assignment by CapMAC, as Surety Provider, to MBIA and to
substitute MBIA for CapMAC in its role as Surety Provider, and grant certain
consents thereunder, in each case, on the terms and conditions hereinafter set
forth;


        WHEREAS, the parties hereto at even date herewith have agreed pursuant
to the provisions hereof to increase the size of the warehouse facility; and


        WHEREAS, in connection with such increase the parties have agreed to
increase the liquidity facility by amendment of the Liquidity Agreement;


        NOW, THEREFORE, the parties hereto agree as follows:


Capitalized terms used and not otherwise defined herein shall have the meanings
assigned to them in the Amended and Restated Triple-A One Credit Agreement dated
as of September 4, 1998 (the "Credit Agreement") among Finco, Triple-A One,
CapMAC and CapFin, and the


<PAGE>   2
Amended and Restated Definitions List dated as of September 4, 1998, attached
thereto (the "Definitions List").


        Section 1. Assignment and Assumption of CapMAC's Rights and Obligations.
Effective as of the date hereof and upon satisfaction of the conditions
precedent set forth in Section 5 below, CapMAC hereby assigns and transfers all
of its rights and obligations as Surety Provider under the Operative Documents
to MBIA, and MBIA hereby accepts such rights and assumes such obligations and
agrees that it will perform in accordance with their terms all of the
obligations which are required to be performed by it thereunder. Each of Onyx,
Finco, Triple-A One, CapFin and the Bank Agent consents to the foregoing
assignment under each of the Operative Documents.


        Section 2. Amendments to Definitions List.


               (a) The following definitions in the Definitions List are hereby
amended to read as follows:


               Liquidity Bond: The financial guaranty insurance policy numbered
               28121(2) issued by MBIA on December 22, 1998 in favor of the Bank
               Agent for the Banks party to the Liquidity Agreement, as
               endorsed, amended, supplemented or otherwise modified from time
               to time.


               Note Bond: The financial guaranty insurance policy numbered
               28121(1) issued by MBIA on December 22, 1998 in favor of Triple-A
               One, as endorsed, amended, supplemented or otherwise modified
               from time to time.


               Surety Provider:  MBIA.


               Triple-A One Commitment: $375,000,000, as such amount may be
               reduced pursuant to Section 2.8 of the Triple-A One Credit
               Agreement or such other amount agreed upon in writing by the
               Seller, Finco, Triple-A One and the Program Manager.


               (b) Clause (b) of the definition of "Eligible Hedge" is hereby
amended to read as follows:


               "(b) provide for the payment by Finco of a fixed rate of interest
               as specified on the confirmation statements relating to such
               Interest Rate Hedge Mechanism(s), such that the weighted average
               Annual Percentage Rate on the Purchased Contracts less the sum of
               (x) a rate of 2% per annum and (y) the fixed rate of interest
               payable by Finco under such Interest Rate Hedge Mechanism(s) is
               greater than 5.5%;"


                                       2


<PAGE>   3
               (c) The following defined term shall be added to the Definitions
List:


                   MBIA: MBIA Insurance Corporation.


        Section 3. Amendments to Insurance Agreement.


               (a) The Insurance Agreement is hereby amended to replace each
reference therein to "Capital Markets Assurance Corporation" or "CAPITAL MARKETS
ASSURANCE CORPORATION" with "MBIA Insurance Corporation" and "MBIA INSURANCE
CORPORATION", respectively.


               (b) The Insurance Agreement is hereby amended to replace the
Surety Provider's notice address in Section 7.2 thereof with the following new
address:


                      MBIA Insurance Corporation
                      113 King Street
                      Armonk, New York  10504
                      Attention: Insured Portfolio Management,
                               Structured Finance
                      Telephone: (914) 273-4949
                      Facsimile: (914) 765-3163

        Section 4. Amendments to Credit Agreement. Section 6.6 of the Credit
Agreement is hereby amended by adding the following proviso at the end of such
section:


                      ";provided, however, that Finco may dividend residual
                      interest certificates from its securitization transactions
                      to Onyx Acceptance Corporation"


        Section 5. Conditions Precedent. The effectiveness of this Amendment and
Assignment is subject to the satisfaction, on or prior to the date hereof, of
the following conditions precedent:


               (a) Triple-A One Note. The Third Amended and Restated Triple-A
One Note, dated September 4, 1998, in the amount of $325,000,000 shall have been
returned to Finco for cancellation. Triple-A One shall have received the Fourth
Amended and Restated Triple-A One Note in the amount of $375,000,000 executed by
a duly authorized officer of Finco.


               (b) Surety Bonds. Triple-A One shall have returned the Note Bond
issued by CapMAC to CapMAC for cancellation. The Bank Agent shall have returned
the Liquidity Bond issued by CapMAC to CapMAC for cancellation.


               (c) Policies. MBIA shall have issued the Note Policy to Triple-A
One and the Liquidity Policy to the Bank Agent, each with an insured obligation
of $375,000,000.


               (d) Facility Increase Fee. MBIA shall have received the facility
increase fee pursuant to the Fee Letter Agreement.


                                       3


<PAGE>   4
               (e) Resolutions. MBIA shall have received a copy of the
resolutions of the Board of Directors of each of Onyx and Finco authorizing the
execution, delivery and performance of this Amendment and Assignment and the
Fourth Amended and Restated Triple-A One Note, certified by an officer of Onyx
and Finco as of the date hereof, which certificate shall state that the
resolutions thereby certified have not been amended, modified, revoked or
rescinded.


               (f) Legal Opinions. MBIA shall have received the following
executed legal opinions:


                      (i) the executed legal opinion of counsel to Onyx and
        Finco with respect to the enforceability of their obligations under the
        Operative Documents, as amended by this Amendment and Assignment and the
        Fourth Amended and Restated Triple-A One Note; and


                      (ii) the executed legal opinion of counsel to Finco to the
        effect that the security interest granted by Finco to the Collateral
        Agent for the benefit of Triple-A One pursuant to the Triple-A One
        Security Agreement continues to be a valid first priority perfected
        security interest.


               (g) Rating Agency Notice. Each of Moody's and S&P shall have
received prior written notice of this Amendment and Assignment and shall have
confirmed the rating of Triple-A One.


               (h) State Street Consent. The Program Manager shall have received
the executed consent of Onyx as the subordinated lender under the Subordinated
Security Agreement to such increase in the Triple-A One Commitment, which
consent shall have been acknowledged and agreed to by State Street Bank and
Trust Company as the pledgee of the Subordinated Note.


        Section 6. Reaffirmation of Security Interest. Finco hereby reaffirms as
of the date hereof the security interest and lien granted in favor of the
Collateral Agent for the benefit of Triple-A One under the Triple-A One Security
Agreement, and agrees and acknowledges that such security interest and lien
shall continue from and after the date hereof, after giving effect to this
Amendment and Assignment. Such reaffirmed security interest and lien remain and
shall continue to remain in full force and effect and are hereby in all respects
ratified and confirmed.


        Section 7. References.


               (a) On and after the effective date of this Amendment and
Assignment, each reference in the Operative Documents to the "Definitions List"
shall mean and be a reference to the Definitions List as amended hereby.


               (b) On and after the effective date of this Amendment and
Assignment, each reference in the Operative Documents to the "Insurance
Agreement" shall mean and be a reference to the Insurance Agreement as amended
hereby.


                                       4


<PAGE>   5
               (c) On and after the effective date of this Amendment and
Assignment, each reference in the Operative Documents to the "Triple-A One
Credit Agreement" shall mean and be a reference to the Credit Agreement as
amended hereby.


        Section 8. Full Force and Effect. Except as specifically amended above,
the Definitions List and the other Operative Documents are and shall continue to
be in full force and effect and are hereby in all respects ratified and
confirmed.


        Section 9. Counterparts; Governing Law. This Amendment and Assignment
may be executed in any number of counterparts and by any combination of the
parties hereto in separate counterparts, each of which shall be an original and
all of which taken together shall constitute one and the same instrument. This
Amendment and Assignment shall be governed by and construed in accordance with
the laws of the State of New York.


        Section 10. Effectiveness. This Amendment and Assignment shall become
effective as of the date first written above when counterparts of this Amendment
and Assignment shall have been accepted and agreed to by Onyx, Finco, Triple-A
One, CapFin, CapMAC, MBIA and the Bank Agent, with written notice of this
Amendment and Assignment to each of S&P and Moody's pursuant to Sections 9(e)
and 10.1 of the Credit Agreement.


                                       5


<PAGE>   6
        IN WITNESS WHEREOF, the parties hereto have caused this Amendment and
Assignment to be duly executed and delivered as of the date first written above.


                                    ONYX ACCEPTANCE CORPORATION





                                    By:_______________________________
                                       Name:
                                       Title:





                                    ONYX ACCEPTANCE FINANCIAL CORPORATION





                                    By:________________________________
                                       Name:
                                       Title:





                                    TRIPLE-A ONE FUNDING CORPORATION


                                    By:  MBIA Insurance Corporation,
                                            its attorney in fact





                                    By:______________________________
                                        Name:   Michael Antonicelli
                                        Title:     Vice President


                                       6


<PAGE>   7
                                    CAPMAC FINANCIAL SERVICES, INC.





                                    By:_________________________________
                                       Name:   Michael Antonicelli
                                       Title:     Vice President





                                    CAPITAL MARKETS ASSURANCE CORPORATION





                                    By:_________________________________
                                       Name:   Michael Antonicelli
                                       Title:     Vice President





                                    MBIA INSURANCE CORPORATION





                                    By:_________________________________
                                       Name:   Michael Antonicelli
                                       Title:     Vice President





                                    NATIONAL AUSTRALIA BANK LIMITED,
                                    New York Branch





                                    By:_________________________________
                                       Name:
                                       Title:


                                       7



<PAGE>   1
                                                                    EXHIBIT 21.1

                   SUBSIDIARIES OF ONYX ACCEPTANCE CORPORATION

Onyx Acceptance Financial Corporation, a Delaware corporation
ABNI, Inc., a Delaware Corporation
Onyx Acceptance Funding Corporation, a Delaware Corporation
C.U. Acceptance Corporation, a Delaware Corporation



<PAGE>   1

                                                                    EXHIBIT 23.1


                       CONSENT OF INDEPENDENT ACCOUNTANTS


We consent to the incorporation by reference in the registration statements of
Onyx Acceptance Corporation on Form S-8 (File Nos. 333-11453 and 333-67799) of
our report dated January 20, 1999, on our audits of the consolidated financial
statements of Onyx Acceptance Corporation as of December 31, 1998 and 1997 and
for each of the years ended December 31, 1998, 1997 and 1996, which report is
included in this Annual Report on Form 10-K.


                                                 PricewaterhouseCoopers LLP


Los Angeles, California
March 29, 1999

<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                       1,928,991
<SECURITIES>                                         0
<RECEIVABLES>                              152,760,781
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                             275,421,724
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
                                0
                                          0
<COMMON>                                        61,710
<OTHER-SE>                                  43,762,011
<TOTAL-LIABILITY-AND-EQUITY>               275,421,724
<SALES>                                              0
<TOTAL-REVENUES>                            60,392,343
<CGS>                                                0
<TOTAL-COSTS>                               50,006,389
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                             1,579,831
<INTEREST-EXPENSE>                          14,436,534
<INCOME-PRETAX>                             10,385,954
<INCOME-TAX>                                 4,310,170
<INCOME-CONTINUING>                          6,075,784
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 6,075,784
<EPS-PRIMARY>                                     0.99
<EPS-DILUTED>                                     0.95
        

</TABLE>


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