<TABLE> <S> <C>

<PAGE>
<ARTICLE> 7
<LEGEND>
This schedule contains summary financial information extracted from condensed
financial statements and related notes of Amerin Corporation and Subsidiaries
for the nine month period ended September 30, 1998 and is qualified in its
entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               SEP-30-1998
<DEBT-HELD-FOR-SALE>                           427,834
<DEBT-CARRYING-VALUE>                                0
<DEBT-MARKET-VALUE>                                  0
<EQUITIES>                                           0
<MORTGAGE>                                           0
<REAL-ESTATE>                                        0
<TOTAL-INVEST>                                 428,400
<CASH>                                           4,506
<RECOVER-REINSURE>                                   0
<DEFERRED-ACQUISITION>                          14,431
<TOTAL-ASSETS>                                 483,425
<POLICY-LOSSES>                                 40,184
<UNEARNED-PREMIUMS>                             25,585
<POLICY-OTHER>                                       0
<POLICY-HOLDER-FUNDS>                                0
<NOTES-PAYABLE>                                      0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           265<F1>
<OTHER-SE>                                     398,181
<TOTAL-LIABILITY-AND-EQUITY>                   483,425
<PREMIUMS>                                      88,364
<INVESTMENT-INCOME>                             15,728
<INVESTMENT-GAINS>                               2,073
<OTHER-INCOME>                                       0
<BENEFITS>                                      25,484
<UNDERWRITING-AMORTIZATION>                     15,161
<UNDERWRITING-OTHER>                            11,349
<INCOME-PRETAX>                                 54,171
<INCOME-TAX>                                    15,710
<INCOME-CONTINUING>                             38,461
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    38,461
<EPS-PRIMARY>                                     1.46
<EPS-DILUTED>                                     1.44
<RESERVE-OPEN>                                       0
<PROVISION-CURRENT>                                  0<F2>
<PROVISION-PRIOR>                                    0<F3>
<PAYMENTS-CURRENT>                                   0<F4>
<PAYMENTS-PRIOR>                                     0<F5>
<RESERVE-CLOSE>                                      0<F5>
<CUMULATIVE-DEFICIENCY>                              0<F5>
<FN>
<F1>Common stock at par value
<F2>Available on an annual basis only
<F3>Available on an annual basis only
<F4>Available on an annual basis only
<F5>Available on an annual basis only
<F6>Available on an annual basis only
<F7>Available on an annual basis only
</FN>
        

</TABLE>