Schedule B (Form 941) is the Report of Tax Liability for Semiweekly Schedule Depositors. You file it with Form 941 every quarter if you're a semiweekly depositor, showing your payroll tax liability on each date you paid wages. The IRS uses it to check your deposits were on time. Skip it if your Form 941 line 12 liability for the quarter is under $2,500.
This guide follows the June 2025 instructions for Schedule B, which go with the March 2024 revision of the schedule, as of October 2026.
Are you a semiweekly depositor?
You're a semiweekly schedule depositor if you reported more than $50,000 of employment taxes in the lookback period, or you built up a tax liability of $100,000 or more on any day in the current or prior calendar year. The full rules are in section 11 of Pub. 15. If you become a semiweekly depositor partway through a quarter, you complete Schedule B for the whole quarter.
Monthly depositors don't file it. They fill in the monthly liability lines on Form 941 itself instead.
What counts as your liability
Your liability for a day is the federal income tax you withheld plus both the employer and employee shares of Social Security and Medicare tax. It's tied to the date wages were paid, not when the payroll period ended, when the liability accrued or when you made the deposit.
Withholding includes Additional Medicare Tax once an employee's wages from you pass $200,000 in a calendar year.
Don't use Schedule B to list deposits. The IRS already gets deposit data from your electronic transfers, so the schedule is only ever the liability side.
How to fill it in
- Enter your EIN and business name exactly as they appear on the attached Form 941 or 941-X.
- Enter the calendar year and tick the same quarter you ticked on Form 941.
- Each month of the quarter has 31 numbered spaces, one for each day. Enter each day's liability in the space for the date you paid wages.
- Add up each month, then add the three months together.
- Check that the total liability for the quarter equals Form 941 line 12.
The IRS example shows how the dating works. A payroll period ending December 31, 2025, with wages paid on January 6, 2026, goes in Month 1, on line 6, because it's the payment date that counts.
Three worked examples from the instructions
| Business | What happened | Where it goes on Schedule B |
|---|---|---|
| Cedar Co. | Pays wages on the last day of each month and paid year-end bonuses on December 24, 2025 | Fourth quarter: Month 1 line 31, Month 2 line 30, Month 3 lines 24 and 31 |
| Fir Co. | Pays every other Friday, $20,000 liability each payday in the second quarter of 2025 | Month 1 lines 4 and 18, Month 2 lines 2, 16 and 30, Month 3 lines 13 and 27 |
| Elm Co. | A new monthly depositor that hit $112,000 of accumulated liability on April 25, 2025 | Became a semiweekly depositor on April 26, 2025 |
Elm Co. shows the trap for growing businesses. Under the deposit rules you become a semiweekly depositor the day after any day you pile up $100,000 or more of liability in a deposit period, and from then on you file Schedule B for the quarter. That $100,000 is measured before any nonrefundable credits.
The research credit adjustment
If you claim the qualified small business payroll tax credit for research on Form 941 line 11, you have to reflect it on Schedule B too. Otherwise the schedule can show more than your line 12 total. The credit reduces the employer share of Social Security tax first, then the employer share of Medicare tax, and you never reduce a daily liability below zero.
Why it decides your penalty
This is the part that costs employers. If you're a semiweekly depositor and you don't complete and file Schedule B correctly, the IRS may propose an averaged failure-to-deposit penalty.
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If you've already been charged a penalty because of an error on the schedule, and the fix doesn't change the quarter's total, you may be able to cut it with an amended Schedule B. Monthly depositors get a version of this too: if you were assessed a penalty after an error in the monthly liability section of Form 941, you can file a Schedule B with only the monthly totals, no daily entries. The instructions' example for semiweekly filers: a liability reported on day 1 of month 1 that belonged on day 1 of month 3. You move it, keep every unchanged entry, write Amended at the top and send it to the address on the penalty notice.
Schedule B with Form 941-X
Prior period adjustments go on Form 941-X and don't change the current quarter's Schedule B. But a late 941-X that increases tax needs an amended Schedule B with it, or the IRS may assess the averaged penalty. With a tax decrease and a penalty already assessed, you can file an amended Schedule B with the 941-X so the penalty falls too.
Annual filers use a different form
Don't attach Schedule B to Form 944. A semiweekly depositor who files the annual Form 944 reports liability on Form 945-A, Annual Record of Federal Tax Liability, instead.
The verdict
If your lookback period was over $50,000, file Schedule B with every Form 941, dated by payday, and make its total match line 12 to the cent. A wrong or missing schedule invites an averaged penalty, so check it before you file. Annual filers on Form 944 skip this schedule.
Frequently asked questions
Who has to file Schedule B with Form 941?
Semiweekly schedule depositors: employers that reported more than $50,000 of employment taxes in the lookback period or had a $100,000 liability on any day.
When is Schedule B due?
It's filed with Form 941, so it has the same due date as that quarter's Form 941.
Do I enter deposits on Schedule B?
No. Schedule B shows your tax liability by the date wages were paid; the IRS gets deposit data from electronic transfers.
What happens if Schedule B is wrong?
The IRS may propose an averaged failure-to-deposit penalty, and an amended Schedule B may reduce it.
Do I file Schedule B with Form 944?
No. Annual filers who are semiweekly depositors use Form 945-A instead.
