The first thing to do is not panic. Most IRS audits are correspondence audits, meaning the IRS mails you a letter asking about a specific item on your return. They are not sending an agent to your office. You get a letter, you respond with documentation, and in many cases that resolves it.

Read the notice carefully. The IRS will tell you exactly which tax year they are examining, which line items or deductions they are questioning, and what documentation they want to see. Sometimes it is as narrow as a single deduction they want a receipt for. Other times it covers broader areas like business income or expense categories. Understanding the scope tells you how much work you are dealing with.

Never ignore the notice. There is a response deadline printed on the letter, and missing it makes everything worse. The IRS will assume the worst if you don’t respond. They will disallow the deduction or add income they believe you underreported, and you will owe taxes plus penalties and interest on top of it. Responding on time, even if you need to request an extension, protects your position.

Gather every piece of documentation that supports what you reported. Bank statements, receipts, invoices, mileage logs, contracts, and canceled checks all count. The IRS wants proof that the numbers on your return match reality. If you claimed $12,000 in vehicle expenses, you need a mileage log or receipts showing that amount. If you reported $85,000 in revenue, your bank deposits and invoices should support that figure.

This is where the quality of your records matters most. Business owners who maintain clean, organized books throughout the year have a much easier time during an audit because the documentation already exists. Those who stuff receipts in a shoebox or reconstruct records after the fact face a harder road. Consistent small business bookkeeping throughout the year is the best audit insurance you can have.

Consider getting professional representation. You have the right to have someone represent you before the IRS, and it is usually worth it. A tax professional knows what the IRS is actually looking for, how to present your documentation effectively, and when to push back on an examiner’s position. They can also communicate with the IRS on your behalf so you don’t have to deal with it directly.

Know your rights as a taxpayer. You can ask questions, request clarification, and appeal any decision the IRS makes. The Taxpayer Bill of Rights guarantees you the right to challenge the IRS position and be heard. If you disagree with the audit findings, you can request a meeting with the examiner’s supervisor or file a formal appeal.

If the audit results in additional tax owed, you can set up a payment plan if you cannot pay the full amount immediately. The IRS offers installment agreements for balances you need time to pay down.

The best time to prepare for an audit is before one happens. Keeping accurate records, categorizing expenses properly, and working with someone who provides proactive tax advisory reduces your audit risk and makes any examination far less stressful. Most audit problems come down to poor recordkeeping, not actual fraud or wrongdoing. If your books are solid, an audit is an inconvenience rather than a crisis.