<PAGE> PAGE 1
000 B000000 01/31/99
000 C000000 0000740123
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 DREYFUS TAX EXEMPT CASH MANAGEMENT
001 B000000 811-3954
001 C000000 2129226754
002 A000000 200 PARK AVENUE
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10166
002 D020000 0144
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
015 A000001 THE BANK OF NEW YORK
015 B000001 C
015 C010001 NEW YORK
015 C020001 NY
015 C030001 10286
015 E010001 X
015 A000002 BANKERS TRUST COMPANY
015 B000002 S
015 C010002 NEW YORK
015 C020002 NY
015 C030002 10015
015 E010002 X
015 A000003 CHASE SECURITIES
015 B000003 S
015 C010003 NEW YORK
015 C020003 NY
015 C030003 10172
015 E010003 X
018 000000 Y
019 A000000 Y
019 B000000 161
019 C000000 DREYFUSFAM
022 A000001 SALOMON SMITH BARNEY
022 B000001 13-1912900
022 C000001 787650
022 D000001 712836
022 A000002 GOLDMAN, SACHS & CO.
022 B000002 13-5108880
<PAGE> PAGE 2
022 C000002 626198
022 D000002 384966
022 A000003 CITICORP SECURITIES INC.
022 B000003 13-2771536
022 C000003 424040
022 D000003 396760
022 A000004 FIRST CHICAGO INVESTMENT SECURITIES, INC.
022 B000004 36-0899825
022 C000004 339800
022 D000004 307000
022 A000005 J.P. MORGAN SECURITIES INC.
022 B000005 13-3224016
022 C000005 328303
022 D000005 256373
022 A000006 PAINEWEBBER INCORPORATED
022 B000006 13-2638166
022 C000006 343421
022 D000006 239376
022 A000007 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
022 B000007 13-5674085
022 C000007 374275
022 D000007 123868
022 A000008 LEHMAN BROTEHRS INC.
022 B000008 13-2518466
022 C000008 352650
022 D000008 140600
022 A000009 MORGAN STANLEY DEAN WITTER & CO.
022 B000009 13-2655998
022 C000009 240570
022 D000009 222950
022 A000010 FIRST ALBANY CORPORATION
022 B000010 14-1391446
022 C000010 194450
022 D000010 260032
023 C000000 5342676
023 D000000 4057534
028 A010000 740683
028 A020000 1282
028 A030000 0
028 A040000 676726
028 B010000 709961
028 B020000 1237
028 B030000 0
028 B040000 804163
028 C010000 778761
028 C020000 1004
028 C030000 0
028 C040000 792184
028 D010000 712101
028 D020000 1147
028 D030000 0
<PAGE> PAGE 3
028 D040000 649016
028 E010000 996679
028 E020000 1295
028 E030000 0
028 E040000 932002
028 F010000 852228
028 F020000 1162
028 F030000 0
028 F040000 995745
028 G010000 4790413
028 G020000 7127
028 G030000 0
028 G040000 4849836
028 H000000 0
037 000000 N
038 000000 0
039 000000 N
040 000000 Y
041 000000 Y
042 A000000 11
042 B000000 0
042 C000000 89
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 625
044 000000 0
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 Y
053 B000000 Y
053 C000000 N
055 A000000 Y
055 B000000 N
056 000000 N
057 000000 N
062 A000000 Y
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 99.5
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
<PAGE> PAGE 4
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 55
063 B000000 0.0
064 A000000 Y
064 B000000 N
070 A010000 Y
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 N
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 N
070 E020000 N
070 F010000 N
070 F020000 N
070 G010000 N
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 Y
070 J020000 N
070 K010000 N
070 K020000 N
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 N
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 0
071 B000000 0
071 C000000 0
071 D000000 0
<PAGE> PAGE 5
072 A000000 12
072 B000000 53883
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 3168
072 G000000 0
072 H000000 0
072 I000000 0
072 J000000 0
072 K000000 0
072 L000000 0
072 M000000 0
072 N000000 0
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 0
072 S000000 0
072 T000000 625
072 U000000 0
072 V000000 0
072 W000000 0
072 X000000 3793
072 Y000000 0
072 Z000000 50090
072AA000000 0
072BB000000 25
072CC010000 0
072CC020000 0
072DD010000 44051
072DD020000 6039
072EE000000 0
073 A010000 0.0000
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 10596
074 B000000 0
074 C000000 1512903
074 D000000 0
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 10176
074 M000000 0
074 N000000 1533675
<PAGE> PAGE 6
074 O000000 12154
074 P000000 267
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 47
074 S000000 0
074 T000000 1521207
074 U010000 1286382
074 U020000 2353338
074 V010000 0.00
074 V020000 0.00
074 W000000 1.0001
074 X000000 1823
074 Y000000 0
075 A000000 1375888
075 B000000 0
076 000000 0.00
077 A000000 Y
077 B000000 Y
080 A000000 VIGILANT INSURANCE COMPANY
080 B000000 NATIONAL UNION FIRE INSURANCE COMPANY
080 C000000 125000
081 A000000 Y
081 B000000 182
082 A000000 N
082 B000000 0
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
SIGNATURE STEPHANIE D. PIERCE
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000740123
<NAME> DREYFUS TAX EXEMPT CASH MANAGEMENT
<SERIES>
<NUMBER> 1
<NAME> INSTITUTIONAL
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> JAN-31-1999
<PERIOD-END> JAN-31-1999
<INVESTMENTS-AT-COST> 1512903
<INVESTMENTS-AT-VALUE> 1512903
<RECEIVABLES> 10176
<ASSETS-OTHER> 10596
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1533675
<PAYABLE-FOR-SECURITIES> 12154
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 314
<TOTAL-LIABILITIES> 12468
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1521720
<SHARES-COMMON-STOCK> 1286382
<SHARES-COMMON-PRIOR> 1319932
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (513)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 1285892
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 53883
<OTHER-INCOME> 0
<EXPENSES-NET> 3793
<NET-INVESTMENT-INCOME> 50090
<REALIZED-GAINS-CURRENT> (25)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 50065
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (44051)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9297174
<NUMBER-OF-SHARES-REDEEMED> (9344669)
<SHARES-REINVESTED> 13945
<NET-CHANGE-IN-ASSETS> (19890)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (488)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3168
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3793
<AVERAGE-NET-ASSETS> 1375888
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .032
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.032)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .002
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000740123
<NAME> DREYFUS TAX EXEMPT CASH MANAGEMENT
<SERIES>
<NUMBER> 2
<NAME> INVESTMENT
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> JAN-31-1999
<PERIOD-END> JAN-31-1999
<INVESTMENTS-AT-COST> 1512903
<INVESTMENTS-AT-VALUE> 1512903
<RECEIVABLES> 10176
<ASSETS-OTHER> 10596
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1533675
<PAYABLE-FOR-SECURITIES> 12154
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 314
<TOTAL-LIABILITIES> 12468
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1521720
<SHARES-COMMON-STOCK> 160897
<SHARES-COMMON-PRIOR> 149138
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (513)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 160875
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 53883
<OTHER-INCOME> 0
<EXPENSES-NET> 3793
<NET-INVESTMENT-INCOME> 50090
<REALIZED-GAINS-CURRENT> (25)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 50065
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (4038)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 572355
<NUMBER-OF-SHARES-REDEEMED> (561192)
<SHARES-REINVESTED> 596
<NET-CHANGE-IN-ASSETS> (19890)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (488)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3168
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3793
<AVERAGE-NET-ASSETS> 136631
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .030
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.030)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .005
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000740123
<NAME> DREYFUS TAX EXEMPT CASH MANAGEMENT
<SERIES>
<NUMBER> 3
<NAME> ADMINISTRATIVE
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> JAN-31-1999
<PERIOD-END> JAN-31-1999
<INVESTMENTS-AT-COST> 1512903
<INVESTMENTS-AT-VALUE> 1512903
<RECEIVABLES> 10176
<ASSETS-OTHER> 10596
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1533675
<PAYABLE-FOR-SECURITIES> 12154
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 314
<TOTAL-LIABILITIES> 12468
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1521720
<SHARES-COMMON-STOCK> 1249
<SHARES-COMMON-PRIOR> 688
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (513)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 1249
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 53883
<OTHER-INCOME> 0
<EXPENSES-NET> 3793
<NET-INVESTMENT-INCOME> 50090
<REALIZED-GAINS-CURRENT> (25)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 50065
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (14)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2192
<NUMBER-OF-SHARES-REDEEMED> (1645)
<SHARES-REINVESTED> 14
<NET-CHANGE-IN-ASSETS> (19890)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (488)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3168
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3793
<AVERAGE-NET-ASSETS> 480
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .031
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.031)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .003
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000740123
<NAME> DREYFUS TAX EXEMPT CASH MANAGEMENT
<SERIES>
<NUMBER> 4
<NAME> PARTICIPANT
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> JAN-31-1999
<PERIOD-END> JAN-31-1999
<INVESTMENTS-AT-COST> 1512903
<INVESTMENTS-AT-VALUE> 1512903
<RECEIVABLES> 10176
<ASSETS-OTHER> 10596
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1533675
<PAYABLE-FOR-SECURITIES> 12154
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 314
<TOTAL-LIABILITIES> 12468
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1521720
<SHARES-COMMON-STOCK> 73192
<SHARES-COMMON-PRIOR> 71827
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (513)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 73191
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 53883
<OTHER-INCOME> 0
<EXPENSES-NET> 3793
<NET-INVESTMENT-INCOME> 50090
<REALIZED-GAINS-CURRENT> (25)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 50065
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1987)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 181208
<NUMBER-OF-SHARES-REDEEMED> (179862)
<SHARES-REINVESTED> 19
<NET-CHANGE-IN-ASSETS> (19890)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (488)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3168
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3793
<AVERAGE-NET-ASSETS> 70779
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .028
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.028)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .006
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
