IRS Audit: What to Expect and How to Prepare

Your chances of being audited depend on several factors, but the overall audit rate is much lower than most people think. For the 2023 filing year, the IRS audited approximately 0.4 percent of all individual returns, or about 1 in 250. That number has been declining steadily since the early 2010s when the IRS started losing funding and staffing. However, the Inflation Reduction Act of 2022 and subsequent legislation gave the IRS significant new funding, and audit rates are expected to climb in the coming years, particularly for higher-income taxpayers.

The audit rate is not evenly distributed across income levels. If you earn less than $200,000 per year and file a straightforward W-2 return, your audit risk is extremely low, somewhere around 0.2 to 0.3 percent. Once your income crosses $400,000, the rate starts climbing. For taxpayers with income above $1 million, the audit rate has historically been between 1 and 3 percent, and the IRS has publicly stated its intention to increase that to 5 percent or higher as new funding allows them to hire and train additional revenue agents. For returns reporting income above $10 million, audit rates have been in the 8 to 12 percent range.

Certain characteristics on your return act as red flags that increase audit risk regardless of income level. Large charitable deductions relative to your income are one of the most common triggers. If you earn $100,000 and claim $40,000 in charitable deductions, that is going to stand out. Home office deductions, especially large ones, have historically attracted scrutiny. Reporting a business loss on Schedule C year after year raises the hobby loss question under IRC Section 183. Claiming the Earned Income Tax Credit has also historically drawn a disproportionate number of audits, though the IRS has faced criticism for that and has signaled it will shift resources toward higher-income audits.

The IRS uses a scoring system called the Discriminant Information Function, or DIF, to rank returns by audit potential. Your return is compared statistically to other returns with similar characteristics. If your deductions, credits, or income ratios deviate significantly from the norm for your demographic and income category, your DIF score goes up and your return is more likely to be selected for review. You never see your DIF score, and the IRS does not disclose the exact formula, but the general principle is that outliers get flagged.

Business returns face additional audit risk factors. S corporations and partnerships with losses that flow through to the owner’s personal return are examined at a higher rate than simple W-2 returns. Large deductions for meals and vehicle expenses are common examination items. If you claim 100 percent business use of a vehicle, the IRS will likely want to see a mileage log. Cash-intensive businesses like restaurants and retail stores get extra scrutiny because the IRS knows that cash income is easier to underreport.

International reporting requirements have become a major audit focus area. If you have foreign bank accounts, you are required to file FinCEN Form 114 (FBAR) and possibly Form 8938 under FATCA. Failure to file these forms can result in penalties starting at $10,000 per violation and can also trigger an examination of your entire return. The IRS has been investing heavily in international enforcement and has information-sharing agreements with tax authorities in dozens of countries.

Amended returns and returns filed with a math error are also examined at higher rates, though for different reasons. Math errors are typically caught by automated systems and corrected without a full audit. Amended returns on Form 1040-X get human review because the IRS wants to understand why the original return was wrong and whether the amendment is legitimate.

The most practical thing you can do to reduce your audit risk is maintain good records and file an accurate return. If every number on your return is backed by documentation, receipts, bank statements, or third-party reporting forms, an audit becomes a non-event. Most audits for typical taxpayers are correspondence audits, meaning the IRS sends you a letter asking you to verify a specific item. You mail back the documentation, and the case is closed. Only about 25 percent of audits involve an in-person meeting with an IRS examiner, and those are concentrated among high-income filers and business returns with complex issues.

If you receive an audit notice, do not panic and do not ignore it. The deadlines in IRS notices are real, and failing to respond can result in the IRS making changes to your return without your input, almost always in the IRS’s favor. Our guide on IRS audits walks through exactly what to expect and how to prepare, and our CPA team represents clients in audits regularly.

It is also worth understanding the statute of limitations for audits. Generally, the IRS has three years from the date you filed your return, or from the due date of the return if you filed early, to initiate an audit. That three-year window is called the assessment statute expiration date, or ASED. However, if you omitted more than 25 percent of your gross income from the return, the statute extends to six years. And if the IRS can show fraud, or if you never filed a return at all, there is no statute of limitations. The IRS can come back at any time.

One common misconception is that getting a refund means the IRS has approved your return. That is not true. Processing your return and issuing a refund is largely automated. The IRS processes over 150 million individual returns each year, and refunds are issued based on the information reported, not based on a human review of the return. The IRS can select your return for audit at any point within the statute of limitations period, even years after you received your refund.

Statistically, most people will never be audited. But the consequences of being underprepared can be expensive. The best defense is a well-documented return filed by a qualified preparer who understands the rules and can defend the positions taken. If your tax situation involves anything beyond a basic W-2 and standard deduction, working with a CPA can significantly reduce both your audit risk and your stress level if an audit does happen.

Yes, the IRS can absolutely audit you after you have already received your refund. Getting a refund does not mean the IRS has reviewed your return, approved the positions you took, or agreed with the income and deductions you reported. The refund process is largely automated. The IRS runs your return through computer systems that check for basic math errors and match the income reported on your return against information returns like W-2s and 1099s. If nothing obviously wrong pops up, the refund is issued. But that automated screening is a far cry from a full examination of your return.

The IRS has three years from the date you filed your return, or from the April 15 due date if you filed early, to initiate an audit under the general statute of limitations in IRC Section 6501(a). If you filed your 2025 return on February 15, 2026, the clock does not start ticking until April 15, 2026, and the IRS has until April 15, 2029, to open an examination. Your refund might arrive in March 2026, but the IRS still has three more years to take a closer look.

In practice, most audits are initiated within 12 to 18 months of filing. But it is not unusual to receive an audit notice two or even two and a half years after filing, well within the three-year window. And in certain situations, the statute is longer. If you omitted more than 25 percent of your gross income from the return, the IRS gets six years instead of three under IRC Section 6501(e). If there is suspicion of fraud, or if you failed to file a required information return like an FBAR or Form 8938, the normal statute may not apply at all.

When the IRS audits a return after a refund has been issued, they will disallow any deductions or credits they find unsupported and assess additional tax. You may also owe interest dating back to the original due date of the return, plus accuracy-related penalties of 20 percent under IRC Section 6662 if the IRS determines there was a substantial understatement of tax or negligence. In some cases, you could end up owing back the entire refund plus additional tax and penalties on top.

Here is a real-world scenario. Suppose you filed your 2025 return claiming $12,000 in charitable deductions and received a $3,200 refund. Two years later, the IRS sends you a CP2000 notice because the charitable deduction seemed high relative to your income. They ask you to substantiate the donations. If you cannot produce receipts, bank statements, or written acknowledgment letters for donations over $250, the IRS will disallow the deductions, increase your taxable income by $12,000, and assess additional tax. If you were in the 24 percent bracket, that is $2,880 in additional tax, plus interest at the federal short-term rate plus 3 percent compounding daily from the original due date, plus potentially a $576 accuracy penalty. Your $3,200 refund effectively turns into a bill for over $3,500.

The lesson here is straightforward. File your return accurately, keep your documentation for at least three years after filing (six years to be safe, and permanently for any year you think might have a gross income omission), and do not assume that receiving a refund means you are in the clear. The IRS processes returns and issues refunds on a flow basis. The audit selection process operates independently on a different timeline.

There are a few specific situations where the audit risk after receiving a refund is elevated. If you claimed refundable credits like the Earned Income Tax Credit or the Additional Child Tax Credit, those returns are examined at a higher rate because the credits result in cash payments from the government, not just reductions in tax owed. The IRS has dedicated teams focused on refundable credit compliance. If you claimed the EITC and your filing status, income, or qualifying children are questioned, the IRS may send you a notice asking for documentation even after the refund has been deposited.

Another common post-refund audit trigger is document matching. The IRS receives information returns, Forms W-2, 1099-NEC, 1099-INT, 1099-DIV, 1099-B, K-1s, and others, from employers, banks and other payers. These forms are due to the IRS by late January or early March, but they are not all processed immediately. The IRS runs matching programs throughout the year, comparing what was reported to them against what you reported on your return. If a discrepancy is found, say you received a 1099-NEC for $8,000 in freelance income that you forgot to include on your return, the IRS will send a CP2000 notice proposing changes. This can happen a year or more after your refund was issued.

If you realize you made a mistake on your return after receiving your refund, the best course of action is usually to file an amended return on Form 1040-X before the IRS contacts you. Voluntary correction generally results in better treatment than waiting for the IRS to find the error. You will still owe any additional tax and interest, but penalties are less likely to be assessed when you self-correct. See our full audit guide for more on how to handle post-filing corrections and reach out to our team if you need help.

One more point worth making: the fact that the IRS deposited your refund via direct deposit or mailed you a check has zero legal significance regarding the validity of your return. There is no legal doctrine of reliance or estoppel that applies here. The IRS is not bound by the refund in any way. Courts have consistently held that issuing a refund is an administrative act, not a determination on the merits of the return. So even though it might feel like the IRS gave your return a stamp of approval when they sent you money, they did not. They simply processed it.

Keep your records organized and accessible. If a notice arrives two years from now about a return you have mostly forgotten about, you will be grateful that your supporting documents are easy to find. A simple folder system, either physical or digital, organized by tax year with all W-2s, 1099s, receipts, and bank statements, is usually all you need. If the IRS does come calling, having clean records turns what could be a stressful months-long process into a quick correspondence exchange.

In most cases, yes, you should amend your return if you discover a mistake before the IRS contacts you. Filing an amended return on Form 1040-X shows the IRS that you are acting in good faith, and it can significantly reduce your exposure to penalties. The IRS distinguishes between taxpayers who voluntarily correct errors and those who get caught, and the treatment is usually much more favorable when you come forward on your own.

The specific answer depends on what kind of mistake you found and how significant it is. If you discovered that you forgot to report $500 in interest income from a savings account, you technically should amend, but the additional tax might be $120 and the practical risk of audit over that amount is minimal. Many tax professionals would tell you to simply report the income correctly from now on and watch for any IRS notice. But, if you forgot to report $15,000 in freelance income from a 1099-NEC, the additional tax could be $4,000 or more, and the IRS will almost certainly catch it through their document matching program. In that situation, amending before the IRS sends you a notice is clearly the right move.

Here is why voluntary correction matters for penalties. Under IRC Section 6662, the IRS can impose a 20 percent accuracy-related penalty on any underpayment of tax attributable to negligence or a substantial understatement of income tax. A substantial understatement exists when the understatement exceeds the greater of 10 percent of the tax required to be shown on the return or $5,000. If you forgot $15,000 in income and owe an additional $4,000 in tax, the penalty could be $800. But the penalty can often be abated if you can show reasonable cause, and one of the strongest arguments for reasonable cause is that you discovered the error and corrected it voluntarily before any IRS contact.

Interest, unlike penalties, cannot be waived. If you owe additional tax because of an error on your original return, interest accrues from the original due date of the return, April 15 of the filing year, regardless of when you discover the mistake or when you file the amendment. The current IRS interest rate is the federal short-term rate plus 3 percentage points, compounded daily. It is published quarterly in Revenue Rulings. For 2026, the rate is running in the 7 to 8 percent range. On a $4,000 underpayment, interest of $280 to $320 per year adds up, so filing sooner is better.

There are situations where amending is absolutely necessary regardless of the dollar amount. If you failed to report foreign financial accounts on FinCEN Form 114, or if you failed to report foreign financial assets on Form 8938, the penalties for non-filing are severe. FBAR penalties start at $10,000 per unreported account per year for non-willful violations, and can reach the greater of $100,000 or 50 percent of the account balance for willful violations. The IRS has specific voluntary disclosure programs for taxpayers with unreported foreign accounts, and using those programs before the IRS contacts you provides significantly better outcomes than waiting to be caught.

The mechanics of filing an amendment are straightforward. You file Form 1040-X, which has three columns: the original amount, the net change, and the corrected amount. You explain the changes on the form and attach any supporting schedules or documentation. Amended returns must be filed on paper if you are amending a return from before tax year 2019. For tax years 2019 and later, you can file Form 1040-X electronically through most tax software. The IRS typically processes amended returns in 8 to 12 weeks, though during busy periods it can take up to 16 weeks.

One tactical consideration: if you are amending a return to report additional income and you owe additional tax, you should pay the tax with the amendment even if the IRS has not processed it yet. Interest continues to accrue until the tax is paid, not until the amendment is processed. Sending a check or making an electronic payment with the 1040-X stops the interest clock from running on the amount paid.

If the mistake goes the other way, meaning you overpaid your taxes, you can also amend to claim a refund. The statute of limitations for filing a refund claim is generally three years from the date the original return was filed, or two years from the date the tax was paid, whichever is later. This is covered under IRC Section 6511. If you missed a deduction or credit on your 2023 return, you have until April 15, 2027, to file an amended return and claim the refund. After that deadline, the money is gone permanently.

Before filing an amendment, it is worth talking to a CPA, especially if the error is large or involves complex issues like business income, partnership K-1 allocations, or foreign reporting requirements. An experienced preparer can evaluate whether the amendment will trigger additional scrutiny, whether there are related issues that should be addressed at the same time, and how to present the correction in a way that minimizes your risk. Our team handles amended returns regularly and can guide you through the process.

The bottom line: if you found a real error that would result in meaningful additional tax, amend the return. Doing it yourself before the IRS finds it demonstrates good faith, often eliminates penalties, and puts you in a much better position if any questions come up later. Trying to hide a mistake is never a good strategy when the IRS has matching systems that compare your return against every W-2, 1099, and K-1 filed by third parties.

Also keep in mind that an amended return restarts certain IRS examination clocks. Specifically, the IRS gets a fresh three-year window to audit the items changed on the amended return. If you amend your 2024 return in April 2027, the IRS has until April 2030 to examine the specific items you changed, even though the original three-year statute would have expired in April 2028. This does not mean amending is a bad idea. The benefits of voluntary correction almost always outweigh the slight extension of audit exposure. But it is something your CPA should be aware of when preparing the amendment.

Ignoring an audit notice is one of the worst things you can do when dealing with the IRS. It does not make the audit go away. It makes everything worse. The IRS does not forget about you if you do not respond. They proceed without you, and the results are almost always more expensive than if you had participated in the process from the beginning.

Here is what happens procedurally when you ignore an audit notice. The IRS sends an initial contact letter, typically Letter 2205 for an office audit or Letter 2202 for a field audit, requesting specific documents or asking you to schedule an appointment. That letter includes a response deadline, usually 30 days. If you do not respond within that window, the IRS examiner will make adjustments to your return based solely on the information they have, which means they will disallow any deductions, credits, or exclusions they cannot verify. They give you nothing you cannot prove, and since they do not have your documentation, they typically disallow everything that is under question.

After making those one-sided adjustments, the IRS sends you a 30-day letter, formally called a Notice of Proposed Adjustment or Examination Report. This letter shows you what changes they are proposing and how much additional tax and penalties you would owe. You get 30 days to agree, disagree, or request a conference with the examiner’s manager. If you ignore this letter too, the IRS moves to the next step.

The next step is the statutory notice of deficiency, also called a 90-day letter. This is a formal legal notice issued under IRC Section 6212, and it is the last chance you have to contest the IRS’s changes before they become final. You have exactly 90 days from the date of the notice to file a petition with the United States Tax Court. If you miss that 90-day deadline, the proposed assessment becomes final and legally enforceable. The IRS can then begin collection action, which includes filing a federal tax lien against your property and eventually levying your bank accounts and wages.

The financial consequences of ignoring an audit compound rapidly. The additional tax itself might be manageable, but interest has been accruing from the original due date of the return. On top of that, the IRS will assess accuracy-related penalties of 20 percent under IRC Section 6662 for negligence or substantial understatement. If they determine you acted with fraudulent intent, the penalty jumps to 75 percent under IRC Section 6663, and the statute of limitations for assessment is removed entirely, meaning the IRS can go back as far as they want.

Let me put dollar amounts on this. Suppose the IRS audits your 2024 return and disallows $25,000 in business deductions you claimed on Schedule C. If you are in the 24 percent bracket, the additional tax is $6,000. A 20 percent accuracy penalty adds $1,200. Interest at 8 percent from April 2025 to April 2027 when the assessment becomes final adds roughly $960. Your total bill is approximately $8,160 for a $6,000 tax adjustment. Now suppose that if you had participated in the audit, you could have substantiated $18,000 of those deductions with receipts and bank statements. The adjustment would have been only $7,000, with additional tax of $1,680 and proportionally lower penalties and interest. By ignoring the notice, you paid nearly five times what you would have owed if you had simply responded.

The collection process that follows an ignored audit can be aggressive. Once the assessment is final, the IRS can file a Notice of Federal Tax Lien, which attaches to all of your property including real estate, vehicles, bank accounts, and accounts receivable. The lien shows up on credit reports and makes it difficult to sell property, refinance a mortgage, or obtain credit. After the lien, the IRS can proceed to levy, which is the actual seizure of property. Bank levies are the most common form. The IRS sends a notice to your bank, and the bank freezes the funds in your account for 21 days, after which the money is sent to the IRS. Wage levies, also called wage garnishments, can take up to 70 percent of your disposable income depending on your filing status and number of dependents.

There are ways to stop or reverse the collection process even after you have ignored the initial audit, but they are more expensive and more difficult than simply responding to the original notice. You can request an audit reconsideration if you have documentation that was not previously considered. You can file a Collection Due Process hearing request within 30 days of receiving a lien or levy notice. You can apply for an installment agreement or an offer in compromise if you cannot pay the full amount. But all of these remedies cost time and usually professional fees that would have been unnecessary if you had dealt with the audit when the first letter arrived.

Never ignore IRS correspondence. Even if the numbers look bad, even if you know you made mistakes, even if you are afraid of what the audit will find, engaging with the process will produce a better outcome than running from it. The IRS examiner’s job is to verify the accuracy of your return, and if you can provide documentation supporting your positions, many adjustments can be avoided entirely. If you cannot handle the audit yourself, hire a CPA or enrolled agent who can represent you. Under a properly executed Form 2848 Power of Attorney, your representative handles all communication with the IRS and you do not have to deal with the examiner directly.

Responding to an audit notice on time preserves your rights, limits your financial exposure, and keeps the situation manageable. Ignoring it creates a snowball of penalties, interest and levies that gets harder to stop the longer you wait.

One final note: if you have already ignored a notice and are now in collections, it is not too late to get help. But you need to act quickly. Every day that passes increases the interest and makes resolution more complicated. Contact a tax professional who has experience with IRS collections, not just return preparation. The skill sets are different, and representation in collections requires knowledge of IRS procedures, the Internal Revenue Manual, and the specific rights available to taxpayers under the Taxpayer Bill of Rights.

Yes, your CPA can talk to the IRS on your behalf, and in most audit situations, having professional representation is one of the smartest decisions you can make. You do not have to sit across the table from an IRS examiner and answer questions yourself. Your CPA can handle everything, from responding to the initial notice to negotiating the final outcome, without you ever speaking directly to the IRS.

The legal mechanism that makes this possible is Form 2848, Power of Attorney and Declaration of Representative. When you sign Form 2848 and designate your CPA as your representative, the IRS is required to deal with your representative instead of contacting you directly. Your CPA can receive copies of all IRS correspondence, attend meetings with examiners, provide documentation on your behalf, negotiate proposed adjustments, agree to or contest findings, and sign certain documents. attorney can be limited to specific tax years and specific types of tax, so you control exactly how much authority your representative has.

Not just any tax preparer can represent you before the IRS. Under Circular 230, the Treasury Department publication that governs practice before the IRS, only three categories of professionals have unlimited representation rights. Certified Public Accountants are one of those categories. The other two are attorneys admitted to practice in any state and enrolled agents, who are individuals who have either passed the IRS Special Enrollment Examination or worked for the IRS for at least five years in a position that regularly interpreted the tax code. Tax preparers who are not CPAs, attorneys, or enrolled agents have limited representation rights. They can only represent clients whose returns they actually prepared, and only during the examination stage, not in appeals or collections.

Having a CPA represent you in an audit offers several practical advantages beyond the obvious comfort of not having to deal with the IRS yourself. First, CPAs know what the IRS is looking for and how to present information in the most favorable way. An IRS examiner might ask a broad question designed to open up additional lines of inquiry. An inexperienced taxpayer might volunteer information that leads the examiner down a new path, expanding the scope of the audit. A CPA knows to answer the question asked, provide the documentation requested, and nothing more. This is not about being evasive. It is about being precise and focused, which is how professional audits are conducted on both sides.

Second, CPAs understand the tax code and can make legal arguments that might persuade the examiner to accept your position. If the examiner is disallowing a home office deduction, for example, your CPA can cite the specific requirements under IRC Section 280A, provide the measurements and documentation that satisfy the regular and exclusive use test, and reference IRS guidance like Revenue Ruling 94-24 or relevant Tax Court decisions. A taxpayer without that knowledge might simply say “I use my office at home for work” and have the deduction denied because they did not present the argument in a way the examiner is trained to evaluate.

Third, having representation creates a professional buffer that reduces the emotional stress of an audit. Tax examinations can feel adversarial, even though they are supposed to be routine compliance checks. Taxpayers sometimes get defensive, argumentative, or anxious when dealing with the IRS directly. Those emotional responses can hurt your case. A CPA approaches the audit as a professional matter, maintains a calm working relationship with the examiner, and makes decisions based on the law and facts rather than emotions.

The cost of CPA representation in an audit varies depending on the complexity of the issues involved. For a simple correspondence audit where the IRS is questioning a single item, the fees might be $500 to $1,500. For an office audit covering multiple items on a moderately complex return, fees typically run $2,000 to $5,000. For a field audit of a business return with multiple years and complex issues, fees can be $10,000 or more. These fees are generally deductible as a business expense if the audit relates to a business return. They are worth every dollar in most cases because the CPA’s work almost always saves more in tax adjustments and interest than the cost of representation.

One important practical detail: Attorney on Form 2848 must be filed with the IRS before your CPA can act on your behalf. The form can be filed electronically through the IRS’s online system or by fax. Once processed, which typically takes 5 to 10 business days through the electronic system, the IRS will direct all correspondence to your CPA. If you have already received an audit notice and want your CPA to handle it, the Form 2848 should be filed immediately so that it is in the IRS system before any response deadlines pass.

Your CPA can also represent you beyond the examination stage if the audit does not go well. If you disagree with the examiner’s findings, you can appeal to the IRS Office of Appeals, also called the Independent Office of Appeals. Your CPA can write the protest letter, present your case at the appeals conference, and negotiate a settlement. Appeals officers have broader authority than front-line examiners to settle cases and can consider the hazards of litigation, meaning they factor in what might happen if the case went to Tax Court. Many cases that look bad at the examination level get significantly better results in appeals.

If the IRS assessment leads to a collection issue, your CPA can also help negotiate an installment agreement, request penalty abatement, or in extreme cases, prepare an offer in compromise. These are all situations where professional representation dramatically improves outcomes compared to going it alone.

Our CPA team at The Reed Corporation represents clients in IRS audits at every level, from simple correspondence inquiries to multi-year field examinations. If you have received an audit notice or any IRS correspondence that concerns you, contact us before the response deadline to discuss your options.