Form 941 and payroll tax deposits: what a startup employer owes, and when

01What Form 941 reports#

For each quarter, the return walks from wages to tax to deposits:

The tax in each quarter must tie to your payroll register and to the payroll tax liability accounts in your general ledger. A 941 that doesn’t reconcile to the books usually means a manual check, a void, or an off-cycle bonus was processed outside the provider.

• Number of employees paid in the pay period that includes the 12th day of the quarter’s last month.
• Wages, tips and other compensation, and the federal income tax withheld from them.
• Social Security tax at a combined 12.4% (6.2% employee, 6.2% employer) on wages up to the 2026 wage base of $184,500 per employee.
• Medicare tax at a combined 2.9% (1.45% each) on all wages, plus the employee-only 0.9% Additional Medicare Tax withheld on wages over $200,000 paid to one employee in the year.
• Adjustments for fractions of cents, sick pay and group-term life insurance.
• Credits, including the qualified small business payroll tax credit for increasing research activities from Form 8974.
• Deposits made for the quarter, and the balance due or overpayment.

02Deposit schedules: monthly or semiweekly#

Filing the 941 is quarterly; paying the tax is not. Federal payroll taxes are deposited electronically (EFTPS, IRS Direct Pay or your IRS business tax account) on one of two schedules, chosen each year by the IRS’s lookback rule. For 2026 the lookback period is July 1, 2024 through June 30, 2025. If your total 941 tax liability in that period was $50,000 or less, you’re a monthly depositor: each month’s taxes are due by the 15th of the following month. Over $50,000, you’re semiweekly: wages paid Wednesday, Thursday or Friday are deposited by the following Wednesday, and wages paid Saturday through Tuesday by the following Friday. A new employer is a monthly depositor for its first calendar year.

Two overrides. If you accumulate $100,000 or more of tax on any day in a deposit period, it’s due the next business day, whatever your schedule, and a monthly depositor who hits that becomes semiweekly for the rest of the year and the next. A one-off bonus round at a funded startup can trigger it. At the other end, if your liability for the quarter (or the prior quarter) is under $2,500 and you didn’t trigger the next-day rule, you can pay with a timely filed return instead of depositing. Deposit due dates that land on a weekend or holiday move to the next business day.

03Form 940 and FUTA, the annual one#

Federal unemployment tax (FUTA) is employer-only and annual, reported on Form 940. The rate is 6.0% on the first $7,000 of each employee’s wages for the year, reduced by a credit of up to 5.4% for state unemployment tax paid on time, so most employers pay 0.6%, or $42 per employee per year. In a state the Department of Labor has designated a credit reduction state (one that hasn’t repaid federal unemployment loans) the credit is smaller and the cost higher.

FUTA is deposited quarterly once the accumulated liability exceeds $500; below that it carries forward. Form 940 is due January 31 of the following year, or February 10 if every deposit was made on time, with the usual next-business-day rule. For 2026, January 31, 2027 is a Sunday, so the 940 is due Monday, February 1, 2027 (or February 10).

04The R&D payroll credit: Form 8974#

A startup that does qualified research but has no income tax to offset can still use the research credit. A qualified small business, generally one with gross receipts under $5 million for the year and no gross receipts before the five-tax-year period ending with that year, can elect on its income tax return to apply up to $500,000 of the credit against payroll taxes, for up to five years. Since 2023 the first $250,000 offsets the employer’s Social Security tax and the rest the employer’s Medicare tax.

The election is made on Form 6765 with the income tax return, and the credit is then claimed each quarter on Form 941 using Form 8974, starting with the first quarter beginning after that return was filed. A calendar-year C-corp that files its 2026 Form 1120 in April 2027 starts using the credit on its 941 for the third quarter of 2027. It’s the most commonly missed piece: the CPA computes the credit on the return, and nobody tells the payroll provider to claim it.

05Penalties#

The IRS charges separate penalties for late filing, late payment and late deposits. Deposit penalties, from Publication 15, scale with how late the money is:

Interest runs on top. And because withheld taxes are held in trust, the trust fund recovery penalty can make responsible individuals personally liable for 100% of what wasn’t paid over. Payroll tax is the one place where a startup’s cash crunch should never be solved by paying late.

• 2% of the unpaid deposit if it’s 1 to 5 days late.
• 5% if 6 to 15 days late.
• 10% if 16 or more days late, or if paid directly to the IRS instead of deposited.
• 15% if still unpaid more than 10 days after the first IRS notice demanding it.

06What the provider does, and what you still own#

A provider such as Gusto, Rippling, Justworks or ADP calculates withholding, makes the federal and state deposits, files the 941, 940 and state returns, and produces W-2s. Under a reporting agent authorization (Form 8655) it does this in your name. What it can’t do:

• Registering for every state where you have an employee, and handing the account numbers to the provider. It can’t file in a state it has no account for.
• Funding payroll on time: a failed debit means a missed deposit.
• Telling the provider about anything paid outside it: a manual check, a bonus wired by a founder, a relocation reimbursement, a taxable fringe.
• Reconciling each 941 to the payroll register and the general ledger, every quarter.
• Opening IRS and state notices. They arrive at the company’s address, not the provider’s, and most have a 30-day response window.
• Telling the provider to claim the R&D payroll credit, with the Form 8974 figures, once the return is filed.