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Audit Risk Calculator
Estimate your IRS audit probability based on return characteristics
Preventative Tool: Use BEFORE filing to identify red flags and reduce audit risk. Based on IRS Data Book 2024 statistics.
Higher income = higher audit rates. $1M+ AGI has 8%+ audit rate.
Self-employment increases audit risk due to deduction complexity.
Frequently Asked Questions About IRS Audit Risk
The Discriminant Information Function (DIF) score is the IRS's secret algorithm that flags returns for audit. It compares your deductions, income, and credits against statistical norms for your income level and occupation. Higher DIF scores mean greater deviation from the norm. The IRS has never published the exact formula, but certain patterns are known to trigger it.
IRS audit rates vary significantly by income: filers earning over $1 million have a 1.1% audit rate, while those earning $25,000-$50,000 have just a 0.4% rate. However, EITC claimants face a disproportionately high 1.0% audit rate. Overall, only 0.4% of all individual returns are audited — the lowest rate in decades due to IRS budget constraints.
Top audit triggers include: unreported income (especially 1099s the IRS already has), Schedule C losses for multiple years, home office deductions, large charitable donations relative to income, round numbers on deductions, cryptocurrency transactions, cash-heavy businesses, and claiming the Earned Income Tax Credit. Having multiple red flags compounds your risk.
Generally 3 years from the filing date. However, if the IRS finds a "substantial understatement" (25%+ of gross income omitted), the window extends to 6 years. There is no time limit for fraud or failure to file. Amended returns can also restart the audit clock for the items changed.
Yes. Key strategies: (1) report all income — the IRS matches 1099s and W-2s automatically, (2) avoid round numbers — $5,000 exactly looks estimated, (3) attach explanations for unusual items, (4) file electronically (fewer processing errors), (5) keep meticulous records so you can defend every deduction if questioned.
Most audits are "correspondence audits" — the IRS sends a letter asking for documentation on specific items. You respond by mail. Only 25% are in-person. If you disagree with the results, you can appeal to IRS Appeals (free) or petition the U.S. Tax Court within 90 days of receiving a Notice of Deficiency. Our Audit Reconsideration workflow can guide you through the process.