FICA Tax Calculator helps taxpayers turn a common tax question into a planning estimate. This guide explains the inputs, the main formula, and when to move from an estimate to official IRS forms or professional advice.
Table of contents
What the calculator estimates
Estimate employee-side FICA tax on wages using the current Social Security wage base, Medicare rate, and Additional Medicare thresholds.
The page is built for quick planning around paycheck and payroll taxes, with source links and a disclaimer so users understand the scope.
Inputs that matter most
The most important inputs are wages, filing status. Small changes to these inputs can change the estimate, especially when a threshold or cap applies.
Use realistic annual numbers whenever possible and keep personal return details out of the browser if you are on a shared device.
How the formula works
Multiply wages up to the Social Security wage base by 6.2%, multiply all wages by 1.45% for Medicare, and apply 0.9% Additional Medicare Tax above the filing-status threshold.
The calculator keeps year-specific rates and limits in the shared annual limits file so January updates are easier to review.
When to use related tools
After using this page, related calculators such as Paycheck-calculator, Bonus-tax-calculator, Self-employment-tax-calculator can help connect the estimate to withholding, deductions, or tax-season planning.
The goal is a practical next step, not a final tax return calculation.
What does FICA include?
Is there a Medicare wage limit?
Is this employee or employer tax?
Why does Social Security tax stop?
Does this include federal income tax?
Go hands-on with the calculator
Estimate employee-side FICA tax on wages using the current Social Security wage base, Medicare rate, and Additional Medicare thresholds.
Open FICA Tax Calculator