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IRS audits & exams8 min readIntro

What triggers an IRS audit for a small business?

Most returns are not audited, but certain patterns increase exam risk—from document matching (1099-K, 1099-NEC) to large deductions and statistical scoring.

WorkMinty publishes general educational information for small business owners. It is not tax, legal, or accounting advice. Tax rules change and vary by state and situation. Consult a qualified CPA, enrolled agent, or attorney before making decisions or responding to a government audit.

Educational only · Last reviewed May 30, 2026

How common are IRS audits?

The IRS audits a small fraction of returns each year. That does not mean you should be careless—an exam is disruptive, and adjustments can include tax, interest, and penalties.

Document matching

One frequent trigger is information return matching. If a vendor reports $50,000 on Form 1099-NEC but your Schedule C shows $30,000 of income, the IRS may send a CP2000 or open a correspondence exam. Reconcile 1099 totals to your books before you file.

Schedule C patterns that draw attention

  • Repeated large losses while you have other income
  • Very high deductions relative to gross receipts
  • Round numbers on many lines (suggests estimates, not records)
  • All-cash businesses with low reported receipts compared to industry norms

The IRS also uses the DIF score (Discriminant Information Function)—a computer model that compares your return to similar businesses. You cannot see your score.

Good practices

  1. Keep a complete general ledger tied to bank statements.
  2. Issue 1099-NEC forms when required and match payee totals to expense categories.
  3. Document unusual items in the year they occur—not at audit time.
  4. Have a CPA review before filing if your return is complex.

What this does not mean

A low audit rate does not guarantee you will never be examined. Preparation—organized records and consistent categories—is the best defense.

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