Federal income tax is a mandatory tax withheld from an employee’s paycheck and paid to the IRS. It funds essential government programs and services such as Social Security, national defense, and public infrastructure. As an employer, you’re responsible for withholding and remitting this tax accurately on behalf of your employees.
How It’s Calculated
Federal income tax withholding is based on:
- The employee’s Form W-4 details (filing status, dependents, and additional withholding requests).
- The employee’s gross pay for the pay period.
- The IRS tax tables and withholding methods (percentage or wage bracket).
Using these factors, the correct federal income tax amount is automatically deducted from each paycheck before issuing payment to the employee.
On SecurePayStubs
When generating a pay stub through SecurePayStubs, the system automatically calculates federal income tax based on the employee’s Form W-4 selections and entered earnings details. This ensures accuracy and compliance with IRS guidelines.
Tip: Always keep employees’ W-4 forms updated and review withholding amounts periodically to ensure correct deductions.
Last modified: March 5, 2026
