Payroll Tax Guide
How this payroll tax calculator works
This payroll tax calculator estimates paycheck deductions by annualizing your gross pay,
applying a simplified federal income tax estimate, calculating Social Security and Medicare
taxes, and subtracting optional state withholding and post-tax deductions.
Federal withholding
The federal withholding estimate is based on annualized taxable pay, filing status,
the standard deduction, and federal tax brackets. It is not a full Form W-4 calculation.
FICA taxes
FICA generally includes Social Security tax and Medicare tax. Social Security has an annual
wage base limit, while Medicare tax does not.
Net paycheck
Estimated net pay is calculated by subtracting pre-tax deductions, estimated taxes,
and post-tax deductions from gross pay.
Payroll tax FAQ
What taxes usually come out of a paycheck?
Common paycheck deductions include federal income tax withholding, Social Security tax,
Medicare tax, state income tax withholding, local taxes, benefits, retirement contributions,
and other deductions.
Is this the same as an official payroll withholding calculation?
No. This calculator provides a simplified estimate. Actual payroll withholding may depend
on your Form W-4, employer payroll system, pre-tax benefit rules, state rules, and local taxes.
What is Social Security tax?
Social Security tax is part of FICA payroll tax. Employees pay a percentage of covered wages
up to the annual Social Security wage base.
What is Medicare tax?
Medicare tax is another part of FICA payroll tax. It generally applies to all covered wages,
and higher wages may also be subject to Additional Medicare Tax withholding.
Why is my actual paycheck different?
Actual paycheck amounts may differ because of health insurance, retirement deductions,
employer benefits, local taxes, W-4 settings, payroll rounding, bonuses, overtime, and other items.
Last updated: April 2026