Employment tax liability is the total amount of federal tax a business owes because it has workers on payroll: the income tax and FICA it withholds from employee paychecks, the Social Security and Medicare it matches from its own funds, and the federal unemployment tax it pays on top. The employer acts as a collection agent for the IRS, and when the money is withheld but not sent in, liability reaches past the business to the individuals who controlled the checkbook.
The Four Federal Taxes and Who Pays Each
Four separate federal taxes make up the total. Each has its own rate, its own wage base, and its own split between employer and employee.
Federal income tax withholding. Employers withhold federal income tax from every paycheck based on what the employee reports on Form W-4, including filing status and any extra withholding requested.1IRS.gov. Form W-4 (2026) Employees Withholding Certificate The amount varies by worker, and the employer contributes nothing of its own to this bucket. It is entirely employee money being routed to the IRS.
Social Security tax. Employer and employee each pay 6.2% of wages up to the annual wage base, which is $184,500 for 2026.2Social Security Administration. Contribution and Benefit Base Once an employee crosses that cap in a calendar year, neither side owes any more Social Security tax on that person’s wages until the next year. At the cap, the maximum is $11,439 from the employee and $11,439 from the employer.
Medicare tax. Both sides pay 1.45% on all wages with no cap.3Social Security Administration. What Is FICA An additional 0.9% applies to wages above $200,000, paid by the employee only. The employer must start withholding that extra 0.9% once an employee’s pay in the calendar year crosses $200,000, regardless of the employee’s filing status.4Internal Revenue Service. Questions and Answers for the Additional Medicare Tax
Federal Unemployment Tax (FUTA). This one is on the employer alone. The statutory rate is 6.0% on the first $7,000 of each employee’s wages. Employers who pay their state unemployment tax on time can claim a credit of up to 5.4%, which drops the effective FUTA rate to 0.6%, or roughly $42 per employee per year.5Internal Revenue Service. FUTA Credit Reduction6Internal Revenue Service. Exempt Organizations – What Are Employment Taxes Employees never pay any portion of FUTA.
Most states impose their own unemployment tax and income tax withholding on parallel tracks. Those obligations are separate from federal employment tax liability, though they run on a similar payroll cycle.
Trust Fund Taxes and Why the Label Matters
The money withheld from employee paychecks is not the employer’s money at any point. Under 26 U.S.C. 7501, amounts withheld from a worker’s pay are held as a “special fund in trust for the United States” from the moment they leave the paycheck.7Office of the Law Revision Counsel. 26 U.S. Code 7501 – Liability for Taxes Withheld or Collected That covers the employee’s FICA share and the federal income tax withheld. The employer’s own matching share is not trust fund money, but the withheld portion is, and that classification is what opens the door to personal liability when the taxes go unpaid.
When Deposits and Returns Are Due
Employers do not wait until they file a return to remit what they owe. Deposits run continuously through the year, and the schedule depends on total tax liability during a four-quarter lookback period.8IRS. Notice 931 – Deposit Requirements for Employment Taxes
- Monthly depositors, meaning employers who reported $50,000 or less in total tax liability during the lookback period, deposit once per month, by the 15th of the following month.9Internal Revenue Service. Employment Tax Due Dates
- Semi-weekly depositors, meaning employers above the $50,000 threshold, deposit taxes from Wednesday, Thursday, and Friday paydays by the following Wednesday, and taxes from Saturday through Tuesday paydays by the following Friday.9Internal Revenue Service. Employment Tax Due Dates
- Any employer that accumulates $100,000 or more in tax liability on a single day must deposit by the next business day. Hitting that threshold also moves the employer to the semi-weekly schedule for the rest of the calendar year and all of the next one.10Internal Revenue Service. Topic No. 757, Forms 941 and 944 – Deposit Requirements
If a deposit deadline falls on a Saturday, Sunday, or legal holiday, the next business day is fine. All federal tax deposits must be made electronically; the IRS does not accept paper checks for deposit payments.11Internal Revenue Service. Depositing and Reporting Employment Taxes
Filing is a separate obligation from depositing. Making every deposit on time does not excuse a missed return. Most employers file Form 941 each quarter to report wages, withheld income tax, and FICA, and the return is due the last day of the month after the quarter closes: April 30, July 31, October 31, and January 31.12Internal Revenue Service. About Form 941, Employers Quarterly Federal Tax Return13Internal Revenue Service. Instructions for Form 941 Very small employers whose combined annual liability for Social Security, Medicare, and withheld income tax is $1,000 or less may file Form 944 once a year instead.14Internal Revenue Service. About Form 944, Employers Annual Federal Tax Return15Internal Revenue Service. Instructions for Form 94016Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026)17Internal Revenue Service. E-File Information Returns
Personal Liability Under the Trust Fund Recovery Penalty
When a business withholds trust fund taxes and fails to pay them over, the IRS does not stop at the corporate entity. Under 26 U.S.C. 6672, any person responsible for collecting and paying over trust fund taxes who willfully fails to do so faces a penalty equal to the full amount of the unpaid trust fund taxes.18Office of the Law Revision Counsel. 26 USC 6672 – Failure to Collect and Pay Over Tax, or Attempt to Evade or Defeat Tax That is the Trust Fund Recovery Penalty, and it lands on individuals.
The “responsible person” category is broad. It can reach owners, corporate officers, directors, partners, and bookkeepers who have authority to decide which creditors get paid. “Willful” does not require intent to defraud; courts have held that using withheld money to pay other bills, knowing the taxes were due, is willful enough. The penalty outlives the business. If the company dissolves, files bankruptcy, or simply closes, the IRS can still pursue the responsible individuals by levying personal bank accounts, filing liens against homes, and garnishing wages. When more than one person is liable, each can be assessed for the full amount, with a right to seek contribution from the others afterward.18Office of the Law Revision Counsel. 26 USC 6672 – Failure to Collect and Pay Over Tax, or Attempt to Evade or Defeat Tax
What Missed Deposits, Filings, and Payments Cost
Setting aside the Trust Fund Recovery Penalty, the IRS layers several ordinary penalties on employers who fall behind, and they stack.
The failure-to-deposit penalty scales with how many calendar days late the deposit is. It is 2% for deposits 1 to 5 days late, 5% for 6 to 15 days late, 10% for more than 15 days late, and 15% if the deposit is still unpaid more than 10 days after the IRS issues a notice demanding payment. The tiers do not compound; you pay the single rate that matches how late the deposit arrived.19Internal Revenue Service. Failure to Deposit Penalty
Missing a return deadline for Form 941 or Form 940 carries a failure-to-file penalty of 5% of the unpaid tax for each month or partial month the return is late, capped at 25%.20Internal Revenue Service. Failure to File Penalty Separately, a failure-to-pay penalty of 0.5% per month runs on any tax that remains unpaid after the due date, also capped at 25%.21Internal Revenue Service. Failure to Pay Penalty
Interest runs on top of all of it. The underpayment rate for the first quarter of 2026 is 7%, compounded daily, and the rate resets each quarter.22Internal Revenue Service. Quarterly Interest Rates Interest accrues on both the unpaid tax and the accumulated penalties.
Worker Classification Changes the Whole Picture
Employment taxes apply only to employees, not to independent contractors. Treating a worker as a contractor when the IRS considers them an employee is one of the most expensive payroll mistakes possible: the agency can hold the business responsible for all the employment taxes that should have been withheld and matched, plus penalties and interest on top.
The IRS weighs three categories of evidence: behavioral control (whether the business directs how the work is done), financial control (who supplies the tools, how the worker is paid, whether the worker has other clients), and the type of relationship (written contracts, benefits, whether the work is a key part of the business).23Internal Revenue Service. Independent Contractor (Self-Employed) or Employee No single factor controls the outcome. If the classification is genuinely uncertain, either the business or the worker can file Form SS-8 to request a formal determination from the IRS.24Internal Revenue Service. About Form SS-8, Determination of Worker Status for Purposes of Federal Employment Taxes and Income Tax Withholding
Records You Need to Keep
Employment tax records must be kept for at least four years after the tax becomes due or is paid, whichever is later.25Internal Revenue Service. How Long Should I Keep Records That includes the employer identification number, the amount and date of every wage payment, employees’ W-4 forms, deposit records with EFTPS confirmation numbers, and copies of all filed returns.26Internal Revenue Service. Employment Tax Recordkeeping In an audit, the burden of proving that the right amount was deposited at the right time falls on the employer, and those records are the defense.