The IRS audits less than 1% of individual tax returns each year — but that statistic doesn't make the prospect any less nerve-wracking. Understanding what actually draws IRS attention can help you file accurately, document your deductions properly, and sleep better at night.
How the IRS Selects Returns for Audit
Most audits aren't random. The IRS uses a scoring system called the Discriminant Information Function (DIF) that compares your return to statistical norms for your income level. Returns that deviate significantly from those norms score higher and are more likely to be reviewed.
The Most Common Audit Triggers
- High income: Returns with income over $500,000 are audited at significantly higher rates
- Large charitable deductions relative to income: Deductions that seem disproportionate to your income level
- Schedule C losses year after year: The IRS may reclassify your business as a hobby if it consistently loses money
- Home office deductions: Especially if the percentage of home used for business seems high
- Cash-intensive businesses: Restaurants, salons, and other cash businesses receive extra scrutiny
- Cryptocurrency transactions: The IRS is actively focused on crypto reporting compliance
- Mismatched income: Income reported on 1099s that doesn't appear on your return
- Round numbers: Deductions that are suspiciously round ($5,000, $10,000) can signal estimates rather than actual records
“The best audit protection isn't avoiding legitimate deductions — it's having documentation that supports every number on your return.”
How to Protect Yourself
- Keep receipts and records for every deduction you claim — for at least 3 years (7 years for business losses)
- Report all income, including 1099s, cash payments, and side income
- Be accurate with business expense deductions — claim what you're entitled to, but document everything
- Work with a credentialed tax professional who can represent you if the IRS comes calling
- Respond promptly to any IRS correspondence — ignoring notices escalates the situation
As an Enrolled Agent, I have unlimited rights to represent taxpayers before the IRS in audits, collections, and appeals. If you're facing an audit or want to make sure your return is audit-ready, let's talk.