How much comes out of your paycheck for Social Security and Medicare

Social Security and Medicare taxes are taken from your paycheck automatically. In 2024, you pay 6.2% of your wages toward Social Security, up to a yearly earnings cap (which changes each year — it was $168,600 in 2024). For Medicare, you pay 1.45% of all your wages with no cap, plus an additional 0.9% Medicare tax on earnings above $200,000 if you're single, or $250,000 if you're married filing jointly.

Your employer matches these amounts dollar-for-dollar, so the total going into the system is double what you see deducted. If you're self-employed, you pay both the employee and employer portions yourself — 12.4% for Social Security and 2.9% for Medicare — though you can deduct half of this on your taxes.

These are separate from income tax. They appear as distinct line items on your pay stub, labeled FICA (Federal Insurance Contributions Act) for Social Security and Medicare.

Key Takeaways

  • You pay 6.2% of wages toward Social Security (up to an annual cap) and 1.45% toward Medicare with no cap, taken directly from your paycheck.
  • Your employer contributes an equal amount for both programs, though you only see your own portion deducted.
  • An extra 0.9% Medicare tax applies to high earners — those making over $200,000 (single) or $250,000 (married filing jointly).
  • Self-employed workers pay both the employee and employer share, totaling 12.4% for Social Security and 2.9% for Medicare.
  • The Social Security earnings cap changes yearly, but Medicare tax has no limit on how much of your income is taxed.

Why the Social Security cap matters

The Social Security tax cap means that once you earn a certain amount in a year, no more of your income is taxed for Social Security. In 2024, that cap was $168,600. If you earn $200,000, you only pay Social Security tax on the first $168,600 of that income.

This cap is adjusted each year based on wage growth in the economy. It was lower in previous years and will likely be higher in future years. You can find the current year's cap on the Social Security Administration website or your employer's payroll system.

Medicare has no such cap. Every dollar you earn, no matter how much, is subject to the 1.45% Medicare tax. This is why high earners pay a larger share of their income into Medicare than into Social Security.

What happens if you work for multiple employers

If you work two jobs or change employers during the year, you might pay Social Security tax on more than the annual cap. This can happen because each employer withholds based on what you've earned at their company alone, not your total income across all jobs.

If you overpay Social Security tax in a year, you can claim a credit on your tax return. The IRS will refund the excess when you file. You do not need to do anything during the year — just keep track of your total Social Security tax paid across all W-2 forms.

Medicare tax does not have this problem since there is no cap. You will pay 1.45% on all wages from all employers.

Self-employed workers and quarterly taxes

If you're self-employed, you pay both the employee and employer portions of Social Security and Medicare taxes. This is called self-employment tax. You calculate it on Schedule SE (Self-Employment Tax) when you file your annual tax return.

Many self-employed workers also pay estimated taxes quarterly — four times a year — rather than waiting until tax time. This spreads the tax burden throughout the year and helps you avoid a large bill in April. Your accountant or tax software can help you calculate quarterly payments based on your expected income.

You can deduct half of your self-employment tax on your income tax return, which reduces your overall tax burden. This deduction recognizes that the employer portion is a business expense, not personal income.

How these taxes fund Social Security and Medicare benefits

The money you pay in Social Security tax goes into a trust fund that pays current retirees, disabled workers, and survivors' benefits. It is not held in an individual account with your name on it. When you retire, your benefit is calculated based on your earnings history and the age you start receiving benefits.

Medicare tax funds the hospital insurance part of Medicare (Part A), which covers inpatient hospital stays, skilled nursing facility care, and some home health services. The premiums you pay later for Medicare Part B (doctor visits) and Part D (prescription drugs) come from a different source — either your own pocket or, for some beneficiaries, from general tax revenue.

Both programs are designed so that current workers' taxes pay for current beneficiaries. This is why the programs are sometimes called "pay-as-you-go" systems.

Tax withholding and your W-4 form

Social Security and Medicare taxes are withheld automatically — you cannot opt out or reduce them. However, you can adjust your overall income tax withholding by filling out a W-4 form with your employer.

The W-4 controls how much federal income tax is taken from your paycheck. It does not affect Social Security or Medicare taxes. If you want to change how much total tax comes out, you would adjust your W-4, not your FICA withholding.

You might file a new W-4 if your life changes — you get married, have a child, take a second job, or have a major change in income. Your employer's payroll department can provide a blank form, or you can read one from the IRS website.

What to do if you think your taxes are wrong

Check your pay stub each time you're paid. Look for the line labeled "Social Security" or "FICA-SS" and "Medicare" or "FICA-Med." The amount should be roughly 6.2% and 1.45% of your gross pay (before deductions), adjusted for the Social Security cap if you're near or above it.

If the amount looks wrong, talk to your payroll or human resources department first. Errors are usually straightforward fixes — a wrong tax withholding code, a data entry mistake, or a misunderstanding about your filing status.

If you believe you've been underpaid or overpaid over time, you can contact the Social Security Administration or the IRS. Keep copies of your pay stubs and W-2 forms as proof of what was withheld.

Frequently Asked Questions

Can I opt out of paying Social Security and Medicare taxes?

No. These taxes are mandatory for all workers earning wages or self-employment income. The only exceptions are certain religious groups and some government employees hired before specific dates, and even those exceptions have strict requirements.

What if I earn money under the table — do I still owe these taxes?

Yes. Self-employment tax is owed on all income, whether reported to an employer or not. Unreported income is also subject to income tax and can result in penalties and interest if discovered during an audit.

Do I pay Social Security tax on tips?

Yes. Tips are considered wages and are subject to Social Security and Medicare taxes. Your employer should withhold these taxes based on tips you report, or you may owe them when you file your tax return.

Why do I pay Medicare tax if I'm not retired yet?

Medicare tax funds the program for all beneficiaries, not just current retirees. You become may be able to access for Medicare at 65, and your years of contributions help determine your coverage. The tax also funds benefits for disabled workers and their families under age 65.

Does the Social Security earnings cap reset each year?

Yes. The cap resets on January 1 each year based on wage growth in the economy. If you change jobs mid-year, each employer withholds based on their own payroll, so you might pay more than the cap if your combined income exceeds it — but you can claim a refund on your tax return.