ERC Audit Statute of Limitations: How Long the IRS Can Come Back for Your Credit

Quick answer: For most Employee Retention Credit quarters, the IRS generally has three years from April 15 of the following year to audit. For the third and fourth quarters of 2021, the One Big Beautiful Bill Act, signed July 4, 2025, extended the audit period to six years, generally measured from the latest of the return filing date, the date it is treated as filed, or the date the claim was made. Claims for those quarters filed after January 31, 2024 are disallowed.

Dana owns a family restaurant with 22 employees. In 2023 a company that called itself an "ERC specialist" told her she qualified for the Employee Retention Credit for six quarters. The firm filed amended payroll returns, took 20 percent of the refund as its fee, and has since closed. Dana received a little over $190,000 and used it to keep the restaurant open.

In 2026 she received an IRS letter asking for records that support the claim. Her first question was a fair one: surely it is too late for the IRS to audit this?

For some of her quarters, it probably is. For others, the IRS has years left. The answer depends on which quarter the credit was claimed for and, since July 2025, on a change in the law.

Key Takeaways

• 2020 quarters: the general audit period ended April 15, 2024.
• First and second quarters of 2021: the general audit period ended April 15, 2025.
• Third and fourth quarters of 2021: six years, which can run into 2029 or 2030 for claims filed late.
• Fraud has no time limit, and erroneous refunds can be recovered by a lawsuit.
• The ERC also changes your income tax wage deduction, which has its own audit period.

A Short Reminder of What the ERC Was

The Employee Retention Credit was a refundable payroll tax credit for employers that kept paying staff during the pandemic. A business could qualify for a calendar quarter in 2020 or 2021 if:

• its operations were fully or partly suspended by a government order, or
• its gross receipts fell by the required percentage compared with the same quarter of 2019.

For most employers the credit ended on September 30, 2021. Only "recovery startup businesses" could claim it for the fourth quarter of 2021. Most claims were made later, on amended payroll returns (Form 941-X), which is why audits are arriving years after the wages were paid.

The Normal Rule: Three Years From April 15

For payroll taxes, all four quarterly returns for a year are treated as filed on April 15 of the following year. The IRS generally has three years from that date to audit and assess.

Applied to the ERC, that gives:

• 2020 quarters: treated as filed April 15, 2021. The general period ended April 15, 2024.
• First and second quarters of 2021: treated as filed April 15, 2022. The general period ended April 15, 2025.

For those quarters, the ordinary window to assess additional payroll tax has closed, subject to the exceptions described below.

What Changed in 2025: Six Years for Late 2021

The tax law signed on July 4, 2025, known as the One Big Beautiful Bill Act, changed the rules for the third and fourth quarters of 2021. Two changes matter most.

• A longer audit period. The IRS's time to assess tax related to ERC claims for those quarters was extended to six years. The period is generally measured from the latest of the date the original return was filed, the date it is treated as filed, or the date the ERC claim was made.
• Late claims are barred. ERC claims for those quarters that were filed after January 31, 2024 are not allowed, and no refund will be paid on them.

The law also extended a 20 percent penalty for excessive refund claims to ERC claims and added obligations and penalties for ERC promoters.

In practical terms, a business that claimed the credit for the third quarter of 2021 on an amended return filed in late 2023 may remain open to an IRS assessment until late 2029. Because the start date depends on your own filing history, the exact date should be worked out from your records.

ERC Audit Timeline by Quarter

• Second, third and fourth quarters of 2020: general three-year period ended April 15, 2024.
• First and second quarters of 2021: general three-year period ended April 15, 2025.
• Third quarter of 2021: six years, generally running to at least April 15, 2028, and later where the claim was filed later.
• Fourth quarter of 2021 (recovery startup businesses): six years on the same basis.

Why "Closed" Quarters Are Not Always Safe

Even where the general period has ended, three things can keep a claim exposed.

Fraud

There is no time limit where a return or claim was fraudulent. Claims based on invented wages or fabricated shutdown orders fall into this category.

Recovery of an erroneous refund

When the IRS pays a refund it should not have paid, the government can sue to recover it, generally within two years of the payment, or five years if the refund was obtained by fraud or misrepresentation. Many ERC refunds were paid in 2023, 2024 and 2025, so this period can still be open for older quarters.

The income tax side

An employer that received the ERC had to reduce its wage deduction on its income tax return by the amount of the credit. If that was not done, the business income tax return, and the owners' personal returns for a pass-through business, may be wrong. Those returns have their own audit periods. The IRS has also issued guidance allowing certain corrections to be made in the year the refund was received.

How Circle of Tax Advisors helps: Our ERC conference reviews your claim quarter by quarter. We determine which quarters remain open, test the eligibility basis that was used, and check whether the wage deduction was handled correctly on the income tax returns, so you know your real exposure.

What an ERC Audit Looks Like

Most ERC examinations start with a letter and an information document request. The IRS usually asks for:

• a written explanation of how the business qualified for each quarter,
• the government orders relied on, and how they limited operations,
• quarterly gross receipts for 2019, 2020 and 2021,
• payroll registers showing wages and health plan costs by employee,
• the Forms 941 and 941-X and the credit calculation,
• Paycheck Protection Program loan and forgiveness records, to confirm the same wages were not used twice,
• ownership details, to identify wages paid to owners and their relatives, which often do not qualify,
• information on related businesses that must be counted together, and
• the agreement with whoever prepared the claim.

The questions the IRS most often presses are these. Was there an actual government order, and not just guidance or a supply problem? Was more than a small part of the business affected? Were the gross receipts compared correctly? Was the employee count, which decides which wages qualify, computed properly?

Other ERC Letters You May Receive

• Letter 105-C or 106-C. A full or partial disallowance of a claim that has not been paid. You generally have two years from the date of the letter to file suit, and you can ask the IRS Independent Office of Appeals to review the decision. Asking for an appeal does not extend the two years.
• Letter 6577-C. A notice that the IRS intends to recapture a credit that was already paid.
• An examination report. A proposed assessment after an audit, with appeal rights.

Each of these has a different deadline. The general steps for handling any examination letter are in our guide to IRS audit letters.

What It Costs If the Credit Is Disallowed

A disallowed credit that was already paid becomes a payroll tax debt. The bill can include:

• repayment of the credit,
• interest from the date of the refund,
• a 20 percent penalty in many cases, and higher penalties where fraud is found, and
• no return of the fee paid to the promoter.

Penalties are often open to challenge. An employer that gave accurate information to an adviser and reasonably relied on the advice may have a defense. See our page on IRS penalty abatement.

What to Do Now, Before a Letter Arrives

1. Collect the claim file. Find the Forms 941-X, the calculation, and any eligibility memo. If the preparer has disappeared, rebuild the file from payroll records.
2. Write down the eligibility basis for each quarter. Note which order applied, or the gross receipts figures that show the decline.
3. Preserve the evidence. Government orders, emails about closures or capacity limits, schedules and financial statements should be kept until the last open quarter has expired.
4. Check the income tax returns. Confirm that wage deductions were reduced, or that the refund was reported under the later IRS guidance.
5. Get an independent review. If a quarter does not hold up, it is better to find that out and plan a response than to learn it from an examiner.
6. Do not rely on the old amnesty programs. The IRS voluntary disclosure programs for ERC have closed. Other ways to correct a claim remain, and the right one depends on the facts.

Dana's review found that four of her six quarters qualified on the gross receipts test with clear records. Two quarters had been claimed on a weak shutdown argument. One of them was the third quarter of 2021, which is still inside the six-year period. Knowing that, she could deal with the weak quarters on her own terms while defending the four strong ones.

Received an ERC letter? The response date is short and the document list is long. Our Tax Audit Defense team handles the examiner, organizes the evidence, and takes disputed quarters to appeal. We explain the scope and cost of our work before it begins. Book a confidential conference.

ERC Audit Deadlines by Quarter

Checklist: What to Do First

1. Separate the claim by quarter.
2. Locate Forms 941 and 941-X.
3. Collect eligibility support.
4. Verify the applicable limitation period.

Know Your Exposure Before the IRS Asks

Call Circle of Tax Advisors at 517-336-7824 or book a confidential conference to have your ERC claim reviewed quarter by quarter.