Corporate Federal Income Tax Returns
With Assets $250 Million
and More
| Fiscal Year | Returns Filed* | District Audits | Auditor Hours (000's) | Additional Tax and Penalties ($millions) | Percent Audited |
| 1988 | 4,500 | 2,867 | na | $9,232 | 63.7% |
| 1989 | 4,483 | 2,876 | na | $10,328 | 64.2% |
| 1990 | 4,200 | 3,030 | na | $10,982 | 72.1% |
| 1991 | 4,600 | 3,129 | na | $17,648 | 68.0% |
| 1992 | 5,784 | 3,160 | 3,147 | $14,972 | 54.6% |
| 1993 | 5,845 | 3,245 | 2,957 | $11,151 | 55.5% |
| 1994 | 6,309 | 3,450 | 3,455 | $11,988 | 54.7% |
| 1995 | 6,891 | 3,509 | 3,780 | $14,784 | 50.9% |
| 1996 | 7,140 | 3,454 | 3,438 | $14,386 | 48.4% |
| 1997 | 7,730 | 3,545 | 3,466 | $13,052 | 45.9% |
| 1998 | 8,460 | 3,153 | 3,159 | $11,212 | 37.3% |
| 1999 | 9,030 | 3,120 | 3,208 | $11,090 | 34.6% |
| 2000 | 9,830 | 3,080 | 2,850 | $8,479 | 31.3% |
| 2001 | 10,310 | 3,233 | 3,666 | $12,772 | 31.4% |
| Percent Change 1997-2001 | +33.4% | -8.8% | +5.8% | -2.1% | -31.6% |
*Return filings are for prior calendar year. IRS audits conducted by AIC International included prior to 1992. NA - not available.