Your employee sets withholding via Form W-4. You calculate, withhold, deposit, and report quarterly
For businesses with five or fewer employees, every new hire changes your federal payroll tax obligations immediately. Federal income tax withholding becomes a legal obligation from the first paycheck.
SurePayroll By Paychex provides the payroll foundation your business needs: tax filing, direct deposit, and new hire reporting.
What is federal income tax withholding?
Federal income tax withholding is the amount you deduct from each employee’s paycheck and remit to the Internal Revenue Service (IRS). It is not your tax. It is your employee’s federal individual income tax, which you collect throughout the calendar year and forward to the government on their behalf.
The pay-as-you-earn system
The pay-as-you-earn system spreads tax payments across the year, so employees pay taxes as they earn instead of facing a single large bill at filing time. Each pay period, you deduct a portion of your employee’s federal income tax and submit it to the IRS as an advance payment.
You withhold those taxes with every payroll run. For hourly employees, that means you recalculate federal tax withholding each pay period based on actual wages earned. For salaried employees, the amount stays consistent unless their W-4 changes.
Federal income tax withholding vs. federal withholding tax: is there a difference?
Federal income tax withholding and federal withholding tax refer to the same thing: the portion of an employee's paycheck you deduct and remit to the IRS toward their federal income tax bill. Federal income tax withholding is the precise term the IRS uses in Publication 15 (Circular E); federal withholding tax is the common shorthand for it. Some people also shorten it to FITW.
Federal income tax withholding versus FICA
Federal payroll tax is the broad category that includes federal income tax withholding, the Federal Insurance Contributions Act (FICA) (Social Security and Medicare taxes), and Federal Unemployment Tax Act (FUTA), which is reported annually on Form 940, Employer’s Annual Federal Unemployment (FUTA) Tax Return.
You withhold FICA separately every pay period. It has its own rates and an employer match, which is part of your employer payroll taxes.
You’re responsible for both, but they work differently. FICA has fixed tax rates and applies up to a wage base limit for Social Security (the maximum amount of earnings subject to Social Security tax, set annually by the Social Security Administration), with a shared cost split between you and your employee.
Federal income tax is variable: The amount changes based on each employee’s Form W-4 elections.
For a business with three employees at different pay levels, all with different W-4 elections, that means three different withholding calculations every pay period.
Example: three biweekly employees, each with a 2020-or-later Form W-4, Step 2 checkbox not checked (Standard Withholding):
Employee C earns more per paycheck than Employee A but has less withheld — the $4,000 in annual dependent credits from Step 3 of the W-4 outweighs the higher pay.
Calculated using the IRS Percentage Method for Automated Payroll Systems (2026 Pub 15-T, Standard Withholding column): annualize the pay-period wage (× 26 for biweekly), apply the bracket for the employee's filing status, subtract any Step 3 dependent credit, then divide by 26.
See how to calculate and withhold federal income tax here. You can also estimate federal income tax withholding with our free paycheck calculator.
If you’re using a payroll service like SurePayroll® By Paychex, it runs those three calculations.
Your employee controls the amount. You execute, remit, and report.
The division is straightforward: Your employee decides how much federal income tax is withheld from their paycheck through Form W-4. You apply that decision, withhold the correct amount, deposit it with the IRS on schedule, and report it quarterly.
For small businesses with five employees or fewer, this means five different W-4 elections to apply, five separate withholding calculations each pay period, and one quarterly filing that covers all of them.
Using Form W-4 to determine withholding
You’ll need IRS Form W-4, Employee’s Withholding Certificate, to determine how much federal income tax to withhold from each paycheck. The employee completes it. You use it.
Every new hire should complete a W-4 before their first paycheck. On it, they’ll specify their filing status, number of dependents, and any additional withholding elections. You must retain completed W-4s for at least four years per IRS requirements.
Your four responsibilities in the income tax withholding system
Your role in the withholding system is specific and finite:
- Apply the W-4. Use your employee’s W-4 information and IRS withholding tables to calculate the correct withholding amount for each paycheck.
- Withhold the correct amount. Deduct the calculated amount from gross pay each period. This amount feeds the year-end Form W-2.
- Deposit withheld taxes on schedule. Remit the withheld amounts to the IRS, according to your assigned deposit schedule.
- Report quarterly. File Form 941, Employer’s Quarterly Federal Tax Return, to report employees’ wages paid and taxes withheld.
Each of these responsibilities repeats every payroll run. For a business with three employees paid bi-weekly, that’s calculating three different withholding amounts 26 times per year, plus tracking deposit schedules and quarterly filing deadlines.
According to the U.S. Census Bureau, 55.7% of all employer establishments have fewer than five employees, which means most employers are doing this for a very small team. But the requirements are the same whether you have three employees or 300.
SurePayroll calculates the withholding and keeps deposits on your schedule.
The payroll service applies each employee’s W-4 elections, calculates withholding using current IRS tax tables, makes the deposits, and files the paperwork on your assigned schedule.
What to do if an employee doesn’t submit a W-4
If an employee doesn’t provide a completed W-4 before their first paycheck, the IRS requires you to withhold federal income tax as if they are single with no adjustments.
This is the required default, not a penalty on the employer or employee.
Make W-4 completion a standard part of your first-day new employee onboarding checklist, so you are withholding accurately from the first paycheck.
After you withhold
Withholding is step one. Depositing the taxes with the IRS on the correct schedule is step two. Both are separate legal requirements, and the IRS tracks both.
The trust fund
Withholding taxes belong to the federal government from the moment you deduct them. The IRS calls this the trust fund. You’re holding money on behalf of the IRS. It’s not your money available for your business use.
Late deposits trigger the Trust Fund Recovery Penalty, which can reach 100% of the unpaid amount and apply personally to small business owners, not just the business.
How federal tax deposits work
Federal tax deposits must be made electronically. The primary tool is EFTPS, the Electronic Federal Tax Payment System, a free service from the U.S. Department of the Treasury.
The IRS assigns your deposit schedule, either monthly or semiweekly, based on your total tax liability in the prior lookback period (the 12 months ending June 30 of the previous year).
Most new small businesses start as monthly depositors. Monthly depositors must remit by the 15th of the following month.
Quarterly tax reporting on Form 941
You report withheld taxes on IRS Form 941, Employer’s Quarterly Federal Tax Return.
This is your required quarterly tax filing. The form covers wages paid, federal income tax withheld, and FICA taxes for each calendar quarter.
Your filing deadlines are April 30, July 31, October 31, and January 31. If those days fall on a holiday, the deadline moves to the next business day.
State income tax withholding
Federal withholding is one obligation. Most states add a second layer: state income tax withholding, with separate rules, forms, and deposit schedules. Many states also require state unemployment insurance (SUI) state unemployment tax or SUTA), which operates alongside FUTA but follows its own rules.
A handful of states do not have state income tax. Check your state’s specific requirements when you set up payroll. Some localities layer on a third obligation, local income tax withholding, with its own rates and filing rules.
The cost a missed withholding deposit
When you miss a federal payroll tax deposit deadline, the IRS applies penalties based on how late the payment is, not a flat fee.
The longer the delay, the higher the percentage applied to the unpaid tax.
In a business with a handful of employees, those costs can add up quickly, especially if missed deposits become a pattern.
IRS penalty structure for deposit failures
Failure-to-deposit penalties start at 2% of the unpaid tax based on your employees’ taxable wages and increase based on how late the deposit is.
This can add up. The IRS assessed nearly $26.9 billion in employment tax penalties in fiscal year 2024.
Federal withholding starts with the first paycheck
Your responsibilities are clear: Collect Form W-4, apply it, withhold the correct amount, deposit on schedule, and report quarterly. SurePayroll automates withholding calculation and deposit scheduling, so you execute every payroll consistently.
For businesses with a small team, manual calculation means recalculating withholding for every employee, every pay period, then tracking deposit schedules and quarterly deadlines separately. Most first-time employers get it right. What varies is how much time it takes away from running their business.
“This is the first time I needed a payroll service, [SurePayroll] was surprisingly quite simple. This is the best service out there that I can find, for the price point and service they provide.” Joseph, Google review
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The day you hire your first employee, federal income tax withholding becomes your responsibility. Payroll software that calculates your tax withholdings and flags deposit deadlines means you can stay on top tasks while running your business.
Withholding is required. The manual work isn’t.
For more than 25 years, SurePayroll has helped small business owners pay their people consistently, file their taxes on their schedule, and keep building what they set out to build.
This content is for educational purposes only, is not intended to provide specific legal advice, and should not be used as a substitute for the legal advice of a qualified attorney or other professional. The information may not reflect the most current legal developments, may be changed without notice and is not guaranteed to be complete, correct, or up to date
