# What Triggers an IRS Audit? Five Warning Signs to Avoid
The IRS audits less than 1 percent of tax returns annually, but certain filing patterns raise red flags that increase your odds. Understanding what triggers scrutiny helps you file defensibly and avoid costly mistakes.
High income tops the list. Returns reporting over $500,000 in adjusted gross income face audit rates around 4 times higher than average filers. Self-employed individuals and business owners see even steeper scrutiny because the IRS views these returns as higher-risk for underreporting income or inflating deductions.
Unusually large charitable donations relative to your income attract attention. The IRS expects charitable giving to stay within reasonable bounds. If your contributions suddenly spike to 50 percent of your income, expect questions. Document everything with receipts and qualified appraisal forms for non-cash donations.
Cash-heavy businesses trigger audits consistently. Restaurants, bars, landscaping services, and cleaning companies report cash income that the IRS knows is often underreported. Keep meticulous records linking deposits to client invoices.
Home office deductions require care. Claiming 800 square feet of a 2,000-square-foot home as dedicated workspace invites scrutiny. The IRS expects only the space used exclusively for business. A dedicated desk in a multi-use room rarely raises flags. A full guest bedroom converted to office space does.
Rental property losses in year after year tell the IRS you may be running a hobby rather than a business. If you deduct losses consistently without showing a profit plan, auditors question your intent. Document your legitimate business efforts and keep a dated activity log.
Filing patterns matter too. Last-minute amendments, frequent carryforwards of losses, and unusually large deductions compared to your industry peers all draw attention.
The solution is simple.