How Paycheck Withholding Works in 2026
Learn how federal income tax withholding, Social Security and Medicare affect take-home pay, with a 2026 example.
By Farrow (pseudonym; identity and professional credentials are not disclosed) · November 4, 2026. This guide is educational information, not tax advice.
Your take-home pay is not the same as your gross pay or your final annual tax bill. A paycheck can include federal income tax withholding, Social Security and Medicare taxes, state or local taxes, insurance premiums, retirement contributions, and other payroll deductions. Which items apply depends on your job, location, and elections.
Federal income tax withholding is a prepayment
Employers generally use your Form W-4 and payroll information to calculate federal income tax withheld from wages. Withholding is credited toward your tax when you file; it is not itself a final calculation of the tax you owe. Your final result depends on your full-year income, filing status, deductions, credits, and other tax details. That is why a refund or balance due can differ from what a single paystub suggests.
Social Security and Medicare
For 2026, an employee's share of Social Security tax is generally 6.2% of covered wages up to the $184,500 wage base. Medicare tax is generally 1.45% of all covered wages. An additional 0.9% Medicare withholding applies to an employee's wages paid by an employer above $200,000 during the calendar year. That employer withholding threshold is separate from the threshold used to determine the additional tax on a tax return.
A simple biweekly example
Suppose an employee earns $2,000 in covered wages for a biweekly pay period and has not reached the Social Security wage base. The employee share of Social Security is $2,000 × 6.2% = $124, and Medicare is $2,000 × 1.45% = $29, for $153 in these two payroll taxes. Federal income tax withholding, state or local taxes, benefits, and other deductions are not included, so $1,847 is not the employee's final take-home amount.
Your federal withholding can change when income or household circumstances change, or when you submit a new W-4. The IRS recommends checking withholding each January and after major life or income changes. Its estimator can help you review a full-year picture; have recent paystubs and a prior return available.
Estimate a paycheck with our paycheck calculator, or use the official IRS Tax Withholding Estimator to review your withholding. Calculator results are estimates, not payroll or tax advice.