Most small businesses will never face an IRS “audit” in a given year—but the chance isn’t zero, and it varies a lot based on how your business is structured, how complex your return is, and what’s on it. This begs the question, “how often do small businesses get audited?”
Before we get into numbers, a quick (important) distinction:
Audit / examination: The IRS formally reviews items on a return (this can happen by mail or in-person).
Notice / mismatch letter: The IRS questions something because it doesn’t match third-party reports (W-2s, 1099s, etc.). These can feel “audit-ish,” but they’re not always counted the same way as examinations.
The stats below focus on IRS examinations (“audits”).
The IRS publishes annual audit/examination statistics in its IRS Data Book. In the FY 2024 Data Book, the IRS reports that (as of the end of FY 2024) it examined 0.40% of individual income tax returns and 0.66% of corporation returns filed for Tax Years 2014–2022.
Most “small businesses” show up on an individual return (sole proprietors filing Schedule C) or on pass-through returns (S corps/partnerships) that flow into individual returns—so in practice, many small business owners experience audit risk that resembles individual-return audit risk, plus any business-related red flags.
When people hear “audit,” they often picture an agent showing up at the office. That’s not how most audits happen.
In FY 2024, the IRS reported that 77.9% of audits were conducted via correspondence (mail) and 22.1% were field exams (in-person).
For small businesses, this matters because:
Many audits begin with a document request letter.
How well you can produce clean support (books, receipts, payroll records, bank statements) often determines how painful it gets.
“Small business” can mean very different things tax-wise:
These returns are common audit targets relative to their size because the IRS knows Schedule C has more opportunities for:
underreported income (especially cash-heavy industries),
personal expenses claimed as business,
unusually high losses or deductions.
(Your “business audit” may still be counted within individual-return exam stats because the business is attached to Form 1040.)
S corps and partnerships file separate returns, but generally don’t pay income tax at the entity level (income flows to owners). The IRS Data Book notes that these pass-through entities generally don’t have a tax liability in the same way corporations do.
In real life, the audit experience often shows up as:
inquiries into the entity’s bookkeeping and deductions, and/or
adjustments that flow through to owners’ individual returns.
C corps are more likely than the smallest Schedule C businesses to have “corporate-level” issues (accounting method, payroll, fringe benefits, shareholder compensation, etc.). The IRS tracks corporation examinations separately (see the corporation exam rate above).
The IRS doesn’t publish a neat “trigger list,” but patterns are well known. The most common risk factors I see in practice include:
Large or unusual deductions relative to revenue (especially travel, meals, vehicle, and “other expenses” buckets)
Big losses year after year, especially when the owner has other income
Cash-heavy revenue (restaurants, salons, convenience retail, certain trades)
High 1099 income with low reported profit
Home office and vehicle deductions without strong documentation
Payroll issues (missing filings, late deposits, misclassified contractors)
Mismatch between what you reported and what the IRS received (1099s/W-2s). The IRS also runs automated matching programs alongside examinations.
None of these guarantee an audit—but they increase the “why does this return look different?” factor.
If you’re a typical small business owner with:
consistent bookkeeping,
reasonable margins for your industry,
payroll handled correctly (if applicable),
deductions that are documented and not wildly out of range,
…your chances of a full audit in any single year are generally low (often well under 1%). That said, “low” isn’t “never,” and the cost of being unprepared can be high—especially if you can’t substantiate deductions.
If you want an “audit-ready” posture, focus on these three:
Clean books that tie out
Reconcile bank/credit cards monthly.
Make sure revenue deposits match what you report (especially if using Stripe/Square).
Documentation system
Keep receipts/invoices organized by month.
For meals, travel, and vehicle: keep the “who/what/where/why” notes.
Entity hygiene
If you’re an S corp: run reasonable payroll and keep distributions/equity reconciled year to year.
For contractors: W-9s, 1099s, and a clear policy.
While small business audit rates are relatively low, the impact of an audit can be significant if your records aren’t in order or you don’t have experienced guidance. The best way to reduce audit risk—and stress if one ever occurs—is to work with an accountant who understands your industry, your entity structure, and the IRS’s expectations.
That’s where AccountantFind comes in.
AccountantFind makes it easy to find an accountant who is experienced in working with small businesses like yours. Instead of spending hours searching online, asking for referrals, or sitting through discovery calls that go nowhere, you complete a short questionnaire and are connected with a professional who can help you maintain clean books, stay compliant, and represent you if the IRS ever comes knocking.
Whether you’re looking to proactively minimize audit risk or need support responding to an IRS notice or examination, having the right accountant in your corner can make all the difference. AccountantFind helps you find that trusted advisor—before an audit becomes a problem.
