Form 941 reports federal income tax withholding, Social Security, and Medicare taxes for each calendar quarter. The return is due the last day of the month following the quarter (April 30, July 31, October 31, January 31). Three penalties potentially apply to a single late or unpaid quarter.
The three Form 941 penalties
1. Failure-to-File · §6651(a)(1)
If the Form 941 itself is filed late, the FTF penalty accrues at 5% per month of the unpaid tax shown on the return, capped at 25%. For returns more than 60 days late, the minimum penalty applies. See the FTF page for the full calculation.
2. Failure-to-Pay · §6651(a)(2)
If the tax shown on the 941 is not paid by the filing deadline, the FTP penalty accrues at 0.5% per month on the unpaid balance. The FTP penalty stacks with the FTF (FTF reduces to 4.5%, so combined 5% per month) until the FTF cap is reached.
3. Failure-to-Deposit · §6656
The most aggressive of the three. Employers are required to deposit withheld federal income tax, FICA, and Medicare on a semi-weekly or monthly schedule depending on prior-year deposit history. Missed deposits trigger §6656 at four tiers:
- Tier 1 — 1 to 5 days late: 2% of the unpaid deposit.
- Tier 2 — 6 to 15 days late: 5% of the unpaid deposit.
- Tier 3 — 16 or more days late, or 10+ days after the IRS first sends notice: 10%.
- Tier 4 — not paid within 10 days of IRS demand: 15% of the unpaid deposit.
A business owes $50,000 in withheld payroll taxes for the quarter. It misses the deposit by 20 days (§6656 Tier 3, 16+ days late: 10%), then doesn't file Form 941 or pay the balance until two months after the due date.
- Failure-to-deposit (§6656, Tier 3): 10% × $50,000 = $5,000
- Failure-to-file (§6651(a)(1), reduced to 4.5%/month while FTP also applies, 2 months): 9% × $50,000 = $4,500
- Failure-to-pay (§6651(a)(2), 0.5%/month, 2 months): 1% × $50,000 = $500
Total penalty exposure: $10,000 — 20% of the original deposit — before interest accrues on top.
A separate penalty under IRC §6672 — the Trust Fund Recovery Penalty (TFRP) — applies to responsible persons within the business who willfully failed to collect or pay over withheld trust-fund taxes. TFRP is equal to 100% of the unpaid trust-fund portion (income tax withholding plus the employee's share of FICA). It is a separate enforcement track from §6656 and can be assessed against individuals personally.
How to abate the penalties
- AEP, then FTA on transition quarters. AEP may prevent FTF, FTP, and FTD on eligible 2026 Form 941 quarters. FTA may still be requested for certain prior and transition quarters. See FTA & AEP.
- Reasonable Cause. Employers can establish reasonable cause for any of the three penalties — common grounds include payroll-processor failure, bank holds, illness or death of the responsible officer, and natural disasters. See reasonable cause.
- Statutory Exception. If the IRS issued incorrect written advice, or processing delays caused the failure, §6664 / §6404 provide relief.
- Designated Payment. If a Tier 4 §6656 has been assessed, taxpayers can designate payments to the trust-fund portion first to limit personal TFRP exposure even while disputing the corporate penalty.