Individuals at highest risk of an IRS audit include those with incomes over $ 500 , 000 $ 5 0 0 , 0 0 0 (especially over $ 10 $ 1 0 million), the self-employed, and those with complex returns, such as large deductions, cash-intensive businesses, or cryptocurrency transactions. Other high-risk groups include those claiming the Earned Income Tax Credit (EITC) and taxpayers with mismatched income reporting (e.g., missing 1099s/W-2s).
Higher income, higher audit rates
Taxpayers with more than $5 million in income were by far the most likely households to be audited in 2022. Source: Internal Revenue Service Data Book, 2024. irs.gov.
The four key components of audit risk, as defined by the Audit Risk Model, are Inherent Risk, Control Risk, Detection Risk, and Acceptable Audit Risk (or Overall Audit Risk), representing the susceptibility of accounts to misstatement, failures in internal controls, the auditor's chance of missing errors, and the acceptable level of risk for the audit, respectively, all combining to determine if a materially misstated financial statement receives an inappropriate opinion.
There are five potential threats to auditor independence: self-interest, self-review, advocacy, familiarity, and intimidation. Any lack of independence compromises the integrity of financial markets.
Which Taxpayers the IRS Audits Most Often. Oddly, people who make less than $25,000 have a relatively high audit rate. This higher rate is because many of these taxpayers claim the earned income tax credit, and the IRS conducts many audits to ensure that the credit isn't being claimed fraudulently.
Audit trends vary by taxpayer income. In recent years, IRS audited taxpayers with incomes below $25,000 and those with incomes of $500,000 or more at higher-than-average rates. But, audit rates have dropped for all income levels—with audit rates decreasing the most for taxpayers with incomes of $200,000 or more.
IRS audits are triggered by discrepancies the IRS's automated systems catch, like unreported income from 1099s, claiming excessive deductions (charity, business meals, home office) compared to your income bracket, large business losses, math errors, significant income jumps, or claiming hobby losses as business expenses, with higher-income earners generally facing more scrutiny.
There are three main types of audit risk—inherent risk, control risk, and detection risk—along with a fourth related concept, sampling risk, which can affect the reliability of audit evidence.
The 5 Cs of audit (Criteria, Condition, Cause, Consequence, Corrective Action) are a framework for structuring clear, actionable audit findings, explaining what should be (Criteria), what is found (Condition), why it happened (Cause), what the impact is (Consequence/Effect), and how to fix it (Corrective Action/Recommendation) to drive organizational improvement and compliance.
2 types of audit risks
First, auditors assess the inherent risk of material departures in the financial statements. Examples of inherent risk factors include complexity, volume of transactions, competence of the accounting personnel, company size and use of estimates. Second, they assess control risk.
Let's take a closer look at each of the different assertion types and how they work.
In risk management, risks are generally classified into four main categories: strategic risk, operational risk, financial risk, and compliance risk. Each of these categories has unique characteristics and requires specific mitigation strategies.
Not reporting all of your income is an easy-to-avoid red flag that can lead to an audit. Taking excessive business tax deductions and mixing business and personal expenses can lead to an audit. The IRS mostly audits tax returns of those earning more than $200,000 and corporations with more than $10 million in assets.
Seven Risk Categories in Cyber Risk Management:
How to Reduce Your Audit Risks
Top IRS audit triggers
Objectivity is the cornerstone of the internal audit golden rule. Auditors must approach their work without bias, ensuring their evaluations are fair, impartial, and based solely on evidence.
Fundamental Principles Governing an Audit:
It's good to be specific, but there's a danger in words such as “everything,” “nothing,” “never,” or “always.” “You always” and “you never” can be fighting words that can distract readers into looking for exceptions to the rule rather than examining the real issue.
What happens during an audit? Internal audit conducts assurance audits through a five-phase process which includes selection, planning, conducting fieldwork, reporting results, and following up on corrective action plans.