IRS Letter 6577-C: ERC Clawback Notice Explained

If you've received IRS Letter 6577-C, the IRS is demanding that you repay the Employee Retention Credit you already received. Over 30,000 businesses have received these "clawback" notices, totaling more than $1 billion in demanded repayments. You have just 21 days to respond—and you have options.

What is an ERC Clawback?

A clawback is when the IRS determines that you received an ERC refund you weren't entitled to and demands you pay it back. Letter 6577-C is the official notice initiating this process.

Unlike a denial of an unprocessed claim, a clawback means you already received money and the IRS wants it returned—plus interest from the date you received the refund.

Why Did You Receive This Notice?

The IRS issues clawback notices for several reasons:

• Post-payment audit findings: The IRS reviewed your claim after payment and determined you didn't qualify.
• ERC mill flags: Claims filed by known problematic promoters are being systematically reviewed.
• Documentation failures: Your eligibility documentation doesn't support the claim that was paid.
• PPP coordination errors: Wages were used for both PPP forgiveness and ERC, which isn't allowed.

The 21-Day Deadline

Letter 6577-C has one of the shortest response deadlines of any IRS notice—just 21 days. Within this time, you must decide whether to:

• Agree and pay: Pay the amount demanded (plus interest) to resolve the matter.
• Request a payment plan: If you can't pay in full, request an installment agreement.
• Dispute the clawback: Challenge the IRS's determination that you didn't qualify.
• Request an appeal: Ask for your case to be reviewed by IRS Appeals before collection begins.

Interest and Penalties

When the IRS demands repayment, they also charge:

• Interest: Interest accrues from the date you received the refund, not from the date of the notice. Current IRS interest rates are significant.
• Accuracy penalties: A 20% penalty may apply if the IRS determines you were negligent or substantially understated your eligibility.
• Fraud penalties: In cases of fraud, the penalty increases to 75% of the underpayment.
• OBBBA penalty: New legislation added an additional 20% erroneous refund claim penalty for ERC.

How to Respond to Letter 6577-C

Your response strategy depends on whether you believe the clawback is justified:

1. Review your eligibility: Before responding, honestly assess whether you actually qualified for the ERC you received.
2. Gather documentation: If you believe you qualified, gather all evidence of government orders, gross receipts decline, and qualified wages.
3. Calculate your exposure: Understand the total amount at stake, including interest and potential penalties.
4. Consult a professional: Given the short deadline and high stakes, professional guidance is strongly recommended.
5. Submit your response: Send your response via certified mail or fax before the deadline.

Can You Fight an ERC Clawback?

Yes, but your success depends on the strength of your eligibility case:

• If you legitimately qualified: With proper documentation, you can challenge the clawback and potentially keep your refund.
• If your claim was questionable: You may be able to negotiate a settlement for less than the full amount demanded.
• If you didn't qualify: Your best option may be negotiating a payment plan to minimize immediate financial impact.