FICA withholding is the money your employer takes from each paycheck for Social Security and Medicare

FICA withholding is a percentage of your gross pay that your employer deducts before you receive your paycheck. The money goes directly to the federal government to fund two programs: Social Security and Medicare. You do not have a choice about whether this happens — it is required by law for nearly all workers in the United States.

The withholding appears as separate line items on your pay stub. You will see "Social Security" or "OASDI" (Old-Age, Survivors, and Disability Insurance) listed separately from "Medicare." Your employer also contributes an equal amount on your behalf, though that money does not come from your paycheck.

The amount withheld is fixed by federal law and does not change based on your tax filing status, number of dependents, or how much you owe at tax time. Unlike federal income tax withholding, you cannot adjust FICA withholding by filling out a W-4 form.

Key Takeaways

  • FICA withholding takes 6.2% of your pay for Social Security and 1.45% for Medicare, totaling 7.65% before any income tax is removed.
  • Your employer matches the exact same amount and sends both portions to the IRS, so the total FICA cost to fund these programs is 15.3% of your wages.
  • FICA withholding stops at a wage cap for Social Security ($168,600 in 2024, though this changes yearly) but continues on all earnings for Medicare.
  • You cannot reduce or stop FICA withholding through your W-4 or any other form — the rate is the same for all workers regardless of income or filing status.
  • The money withheld is not held in a personal account for you; it funds current Social Security and Medicare payments to beneficiaries today.

The two parts of FICA: Social Security and Medicare rates

FICA has two components with different rates and different wage caps. Social Security withholding is 6.2% of your gross pay, up to a maximum wage base that changes each year. In 2024, that cap is $168,600, meaning once you earn that much in a calendar year, no more Social Security tax is withheld from additional earnings. Your employer also pays 6.2%, so the total Social Security contribution is 12.4%.

Medicare withholding is 1.45% of all your gross pay with no wage cap — it continues on every dollar you earn, no matter how much you make. Your employer contributes another 1.45%. Additionally, if your income exceeds certain thresholds ($200,000 for single filers, $250,000 for married filing jointly), an extra 0.9% Medicare tax is withheld from your pay. This additional tax has no employer match.

Together, the base FICA withholding is 7.65% of your paycheck. If you are a high earner subject to the additional Medicare tax, your total FICA withholding will be higher.

Why the wage cap matters for Social Security but not Medicare

The Social Security wage cap exists because Social Security benefits are calculated based on your highest 35 years of earnings, and benefits are capped at a maximum amount. Once you reach the wage base limit in a given year, additional earnings do not increase your future Social Security benefit, so the law stops withholding on those earnings.

Medicare has no wage cap because Medicare benefits are not tied to how much you earned — everyone over 65 gets the same Medicare coverage regardless of income. Therefore, Medicare tax is collected on all wages to fund the program for all beneficiaries.

This distinction means high-income earners pay the same total Social Security tax as someone earning $168,600, but they pay Medicare tax on every additional dollar above that amount.

How FICA withholding appears on your pay stub

Your pay stub will show FICA withholding broken into at least two lines. You may see "Social Security Tax" or "OASDI Tax" listed with the amount withheld and the rate (6.2%). Below that, "Medicare Tax" or "Med Tax" will show 1.45% withheld. Some pay stubs also show "Medicare Additional Tax" or "Additional Medicare Tax" as a separate line if you are subject to the extra 0.9%.

The amount withheld is calculated on your gross pay — the total before any deductions. This means FICA is taken out before federal income tax, state income tax, health insurance premiums, or 401(k) contributions. However, certain pre-tax deductions like traditional 401(k) contributions do reduce the amount subject to FICA withholding.

Your pay stub will also show year-to-date totals for each FICA component. This helps you track when you have reached the Social Security wage cap and when additional earnings will no longer have Social Security tax withheld.

What happens to the money withheld

FICA withholding does not go into a personal account with your name on it. Instead, the money goes into the Social Security Trust Fund and the Medicare Trust Fund, which pay benefits to current retirees, disabled workers, and Medicare beneficiaries. When you eventually retire or become may be able to access for Medicare, your benefits will be funded by FICA withholding from workers at that time.

Your employer sends both the employee and employer portions of FICA to the IRS, usually monthly or quarterly depending on the size of the payroll. The IRS then distributes the money to the Social Security Administration and the Centers for Medicare and Medicaid Services.

The amount you have paid into FICA over your working life is tracked by the Social Security Administration under your Social Security number. This record is used to calculate your Social Security benefit amount when you reach retirement age or become disabled.

Self-employed workers and FICA

If you are self-employed, you pay both the employee and employer portions of FICA, called Self-Employment Tax. This means you pay 12.4% for Social Security (up to the wage cap) and 2.9% for Medicare (with no cap), totaling 15.3% on your net self-employment income. High-income self-employed workers also pay the additional 0.9% Medicare tax.

Self-employed workers report this on Schedule SE (Self-Employment Tax) when filing their tax return. You can deduct half of your self-employment tax as an adjustment to income, which reduces your taxable income but does not reduce the amount of FICA you owe.

FICA withholding and your tax refund

FICA withholding is separate from federal income tax withholding and does not affect your tax refund. Your refund is based only on how much federal income tax was withheld versus how much you actually owe. FICA taxes are not refundable — once withheld, that money goes to fund Social Security and Medicare, not back to you.

However, if you overpaid federal income tax during the year, you may receive a refund of that overpayment. FICA withholding will still appear on your tax return as taxes paid, but it is not part of the refund calculation.

Frequently Asked Questions

Can I reduce or stop FICA withholding?

No. FICA withholding is required by law and cannot be reduced, stopped, or adjusted through any form or election. The rate is the same for all workers. The only exception is certain religious groups that have been granted exemption by the IRS, which requires a specific application process and approval.

What if I work multiple jobs — do I pay FICA on all of them?

Yes, you pay FICA on all wages from all jobs. However, the Social Security wage cap applies across all employers combined in a single year. If you reach the cap at one job, you may be able to claim a credit on your tax return for excess Social Security tax withheld, which you can recover when you file.

Does FICA withholding count toward my income tax?

No. FICA and federal income tax are separate. FICA funds Social Security and Medicare specifically. Federal income tax funds general government operations. Both are withheld from your paycheck, but they are calculated and tracked independently.

Why do I pay FICA if I might not collect Social Security?

FICA funds not only retirement benefits but also disability benefits and survivor benefits for your family if you become disabled or die. Additionally, Medicare is available to nearly all workers over 65 regardless of whether they collect Social Security. The program is designed to provide a safety net for all workers.

What is the wage cap for 2024 and does it change?

The Social Security wage cap for 2024 is $168,600. This cap increases each year based on the national average wage index. The IRS announces the new cap in October for the following year. Medicare has no wage cap and never changes.