The IRS has issued information from the 2009 income tax filing season. As a voluntary compliance system, taxpayers often are interested to know their chances of audit. Below are some interesting facts and statistics.
| Individual returns filed | 142,823,105 |
| Audits of individual returns | 1,581,394 |
| Individual audits that were only correspondence audits | 78.3% |
| Audit rates for individual returns with $200,000 to $1 million in income | 2.5%-2.9% |
| Audit rates for individual returns with more than $1 million in income | 8.4% |
| Audit rates for corporations (excluding S corporations) | 1.4% (with percentages increasing significantly with increased total assets – e.g., 45% for corporations with $5-$20 billion in assets |
| Audit rates for partnerships and S corporations | .4% |
| Offers in compromise | 57,000 filed and 14,000 accepted |
| Criminal investigations | 2010: 4,706 investigations – 3,034 referrals for prosecution – 2,184 convictions |
| Incarceration rate for convicted taxpayers | 81.2% |
