Payroll tax penalties and how to avoid them

When you run payroll yourself, you take on every deadline a payroll service would track for you. Most payroll tax penalties come from a few common mistakes: a deposit made late, a return filed late, or withheld tax that never reaches the government. This guide covers the main federal and Oklahoma penalties, how each is figured, and the habits that keep you clear of them.

The deposit penalty: paying late, short, or the wrong way

The most common payroll penalty is the IRS Failure to Deposit Penalty. According to the IRS Failure to Deposit Penalty page, it applies when employment tax deposits are not made:

• On time
• In the right amount
• In the right way

Employment taxes here include federal income tax withheld, Social Security and Medicare taxes, and federal unemployment tax (FUTA). You send deposits on either a monthly or a semiweekly schedule. If you're not sure which schedule applies to you, read Payroll tax deposit schedules: monthly vs. semiweekly.

The penalty is a percentage of the deposit you missed. It depends on how many calendar days late the deposit is, counted from its due date:

These tiers don't add together. A deposit that is 20 days late owes 10% in total, not 2% plus 5% plus 10%. The IRS also charges interest on penalties, and the interest keeps growing until you pay the balance in full.

"The right way" matters too. A deposit made on time but through the wrong method can still trigger this penalty. To learn the deposit process step by step, see How to make an EFTPS payroll tax deposit.

The filing penalty: returns filed late

Making your deposits on time is only half of the job. You also have to file the returns that report those deposits. The IRS Failure to File Penalty page says that for individuals and most business returns, the penalty is 5% of the tax due (less tax paid on time and available credits) for each month or partial month the return is late, up to a maximum of 25%. If the failure to pay penalty also applies, the failure to file penalty is reduced by that amount.

For the exact late-filing rules on Form 941 or Form 940, check the current instructions for that form. To stay on schedule, see How to file Form 941 yourself.

A note for S-corp owners: Form 1120-S

The S corporation's own income tax return has a separate late-filing penalty. The IRS charges it for each month or partial month the return is late, for up to 12 months. Each month's penalty is a base rate multiplied by the number of shareholders during the year. For returns due (without extension) after 12/31/2025, the base rate is $255. For returns due in 2025 it was $245. The penalty does not apply if the S corporation can show reasonable cause.

The Trust Fund Recovery Penalty: when it becomes personal

This is the penalty S-corp owners should take most seriously. Income tax and the employee's share of Social Security and Medicare that you withhold from paychecks are called trust fund taxes. You hold that money in trust for the employee until you deposit it.

The IRS Trust Fund Recovery Penalty page explains that if these taxes can't be collected from the business right away, the IRS may assess the penalty against a "responsible person." That can include a corporate officer, director, or shareholder who has the duty and the power to direct the collecting, accounting and paying of these taxes. In a small S corporation, that is usually you.

Key points from the IRS:

• The penalty equals the unpaid trust fund tax: the unpaid income tax withheld plus the employee's share of withheld FICA taxes.
• The business doesn't have to have shut down for the penalty to be assessed.
• "Willful" doesn't require bad intent. It means you knew, or should have known, about the unpaid taxes and ignored the law or were plainly indifferent to it.
• Paying other creditors with available funds when the business can't pay its employment taxes is an indication of willfulness.
• Once the penalty is asserted, the IRS can take collection action against your personal assets, such as a federal tax lien or a levy.

If the IRS proposes this penalty, you get a letter and have 60 days from its date to appeal (75 days if it's addressed to you outside the United States). The simple rule: never use withheld payroll tax money to cover other bills.

Oklahoma penalties to know

If you have Oklahoma employees, you also answer to two state agencies.

Oklahoma Tax Commission (withholding). The OTC's Packet OW-2 (2026 withholding tables) sets these rules for remitting state withholding:

• If you withhold $500 or less per quarter, remit quarterly, on or before the 20th of the month after the quarter ends.
• If you withhold more than $500 but less than $5,000 per quarter, remit monthly, on or before the 20th of the following month.
• If your withholding was $5,000 or more per month in the previous fiscal year, you must remit electronically.

The packet lists a penalty of 10% for failure to pay withheld tax when it is due. Check the current OW-2 for the full penalty and interest rules. For tax year 2025, W-2 and W-3 information had to reach the OTC through OkTAP by January 31, 2026. Paper forms and flash drives are returned and treated as not filed. For setup help, see OkTAP withholding registration and Form WTH-10001.

Oklahoma Employment Security Commission (unemployment). The OESC wage reporting page says every active tax account must file a quarterly wage report, even if you paid no wages that quarter. If you miss the deadline, OESC mails a Notice of Non-Receipt (OES-054). For experience-rated employers who still haven't filed within 15 days of that notice, the penalty is $200 plus 10% of the total contributions due, and interest accrues at 1% per month until paid. For the filing steps, see Oklahoma OES-3 quarterly unemployment report.

How to avoid payroll tax penalties

Most penalties come from forgetting a deadline, not from bad math. A routine will prevent most of them.

1. Confirm your deposit schedule each year. Use the deposit schedule guide and write the schedule down.
2. Put every deadline on a calendar. Include federal deposits, Form 941 and 940, Oklahoma withholding, and OESC quarterly reports. The S-corp payroll calendar lists them, and the free deadline calendar exports them to your own calendar app.
3. Deposit when you run payroll, not when it's due. Moving the tax at the same time as the paycheck takes away the chance to forget it.
4. Keep tax money separate. Treat withheld taxes as money that is no longer yours.
5. File even when you owe nothing. OESC requires a report for every active account, wages or not.
6. Reconcile each quarter. Check that your deposits match what your return reports before you file.

Quick quarterly checklist

• All federal deposits made on schedule through EFTPS
• Form 941 filed for the quarter
• Oklahoma withholding remitted on time
• OESC quarterly wage report filed
• Deposits match the totals on your returns

If you already owe a penalty

First, read the notice carefully. The IRS penalty relief page says to check that the information is correct. If it isn't, follow the instructions in the notice.

Then work through your options:

1. Pay what you can now. Paying in full stops further penalties and interest from adding up. If you can't pay in full, pay what you can and apply for a payment plan. That may reduce future penalties.
2. Ask about relief. The IRS offers three types: first time penalty abatement and administrative waiver, reasonable cause, and statutory exception. Failure to deposit and failure to file are both eligible.
3. Call the number on your notice. Have the notice, the penalty you want relieved, and your reasons ready. Some requests are approved over the phone.
4. Put it in writing if needed. If relief isn't approved on the call, you can request it with Form 843, Claim for Refund and Request for Abatement.
5. Appeal a denial. If relief is denied, the IRS notice will point you to the appeal steps.

By law, the IRS can't remove interest unless it removes or reduces the related penalty. When it does, it reduces or removes the related interest automatically. If you can't resolve a penalty on your own, the Taxpayer Advocate Service, an independent organization within the IRS, may be able to help.

Where Selfroll fits

Selfroll is a free tool for small S-corp owners who run payroll themselves. It does the payroll math, keeps a deadline calendar you can export, and fills draft copies of Forms 941, 940, W-2, W-3 and Oklahoma WTH-10001 for you to review. You move the money from your own bank and file everything yourself.

Sources

• IRS: Failure to Deposit Penalty
• IRS: Failure to File Penalty
• IRS: Employment Taxes and the Trust Fund Recovery Penalty (TFRP)
• IRS: Penalty Relief
• Oklahoma Tax Commission: Packet OW-2, 2026 Withholding Tables
• Oklahoma Employment Security Commission: Wage Reporting

This guide is general information, not tax or legal advice. Check current IRS, SSA and state rules or ask a CPA.