The IRS doesn’t pick audit targets the way it used to. There’s no agent sitting in a back office flipping through returns and flagging suspicious ones. Instead, there’s AURA — the Automated Underreporter and Risk Assessment system — and it’s scoring your tax return with AI before a human ever lays eyes on it.
If you’re self-employed, own an LLC, or claim business deductions, AURA is already watching. Here’s what you need to know.
What Is AURA?
AURA is the IRS’s machine learning enforcement platform. It analyzes every return filed — millions per year — and assigns each one a Discriminant Function (DIF) score, a numeric risk rating that determines your likelihood of being selected for audit.
The system cross-references your return against:
- Third-party data (1099s, W-2s, bank reporting, broker statements)
- Historical taxpayer data (your prior years’ filings)
- Peer comparisons (how your deductions compare to others in your industry and income bracket)
- Known fraud patterns (specific red flags the IRS has identified over decades of enforcement)
A high DIF score doesn’t guarantee an audit — but it puts you in the pool. A low score keeps you out.
Why AURA Matters More in 2026
The IRS received a significant funding increase in recent years specifically earmarked for enforcement technology. AURA has been expanded and refined. The agency has also begun integrating data from financial institutions under the Bank Secrecy Act, which means cash businesses and side-income earners have significantly less cover than they did five years ago.
The IRS now has:
- Access to payment processor data (Venmo, PayPal, Cash App all report over $600)
- Enhanced matching against 1099-NEC and 1099-K filings
- Better detection of inflated business deductions
- Sharper algorithms for identifying ghost preparers and fraudulent returns
The result: audit rates for certain categories of self-employed filers have increased, even as overall audit rates declined for W-2 employees.
What AURA Is Looking For
AURA flags anomalies — anything that deviates from expected patterns given your income level, industry, and history. Common triggers include:
Income mismatches. If your clients file 1099s totaling $150,000 and you report $110,000 in gross receipts, that $40,000 gap is an immediate flag.
Deduction-to-income ratios. Claiming $80,000 in business expenses on $100,000 of gross income raises questions, especially if peers in your industry average much lower ratios.
Round numbers. Deductions of exactly $10,000, $25,000, or $50,000 signal estimation rather than actual recordkeeping.
Home office claims. The home office deduction has one of the highest audit rates of any line item because it’s frequently miscalculated or entirely fabricated.
Vehicle deductions. Claiming 100% business use of a personal vehicle is a known red flag.
Cash-intensive businesses. Restaurants, contractors, and other cash businesses face heightened scrutiny because income is harder to verify.
What You Can Do About It
You can’t prevent AURA from scoring your return. But you can score lower.
Match what third parties report. Before you file, reconcile every 1099 you should have received. If a client paid you $5,000 and files a 1099 for that amount, that number needs to appear in your income.
Document everything. AURA doesn’t know what your receipts say — but if you’re audited, an IRS agent will. Proper documentation transforms a flagged return into a closed case.
Stay within industry norms. Unusually high deduction ratios compared to peers in your field are a primary AURA trigger. If you have legitimate reasons for above-average deductions, document those reasons now.
Be consistent year-over-year. Dramatic swings in income or deductions between years attract attention. If your income dropped 40% or your deductions jumped 60%, be prepared to explain why.
Work with a professional. A qualified tax professional who understands IRS enforcement patterns can help structure your return to be accurate and defensible.
The Bottom Line
AURA has fundamentally changed IRS enforcement. It’s faster, broader, and more data-driven than anything the agency has deployed before. The good news: if your records are accurate and complete, a high DIF score leads nowhere. The system is looking for inconsistency — and consistency is something you control.
At AUDITPROOF, we help self-employed Americans and LLC owners build the documentation systems and compliance practices that make audits uneventful. If you’d like a professional assessment of your current risk profile, start with our free IRS Risk Score Quiz or download our free audit checklist.