The Social Security tax rate is 6.2% of your wages, taken from your paycheck

Your employer also pays 6.2% on your behalf, for a combined total of 12.4%. If you are self-employed, you pay both portions yourself — 12.4% total — though you can deduct half of it when you file taxes. The 6.2% applies to wages up to a certain annual limit, which changes each year. In 2024, that limit is $168,600, meaning once you earn that much in a calendar year, no more Social Security tax is taken from your paychecks for the rest of that year.

This money funds two programs: Social Security retirement and disability benefits. The rate has been 6.2% since 1990 and is set by federal law, not by your employer or your state. It appears on your pay stub as "FICA" (Federal Insurance Contributions Act) or sometimes as "Social Security" or "SS tax".

Key Takeaways

  • You pay 6.2% of your wages into Social Security, and your employer pays another 6.2%, for a combined 12.4%.
  • The 6.2% rate applies only to wages below an annual cap, which was $168,600 in 2024 and increases most years.
  • Self-employed workers pay the full 12.4%, but can deduct half of it as a business expense on their tax return.
  • The same 6.2% funds both retirement benefits and disability benefits; the money is not separated into two accounts.

Why there is an annual wage cap

Social Security was designed to replace a portion of your working income, not all of it. The wage cap reflects that purpose: higher earners pay the same total amount as someone who hits the cap, but a smaller percentage of their total income. In 2024, someone earning $168,600 pays $10,453 in Social Security tax; someone earning $500,000 pays the same $10,453, because tax stops at the cap.

The cap is adjusted each year based on changes in average national wages. It typically rises by a few hundred dollars annually, though some years it stays the same. You can find the current year's cap on the Social Security Administration website or on your pay stub.

How self-employment tax works differently

If you are self-employed, you pay both the employee and employer portions of Social Security tax — 12.4% total — on your net business income. This is called self-employment tax and is calculated on Schedule SE when you file your federal income tax return.

The law allows you to deduct half of your self-employment tax (6.2%) as an adjustment to income on your tax return, which lowers your taxable income. You still owe the full 12.4%, but the deduction reduces the income tax you owe on top of it. The annual wage cap still applies: once your net self-employment income reaches the cap for that year, you stop paying the 12.4% on income above it.

What happens if you work for multiple employers

If you work for two or more employers in the same year, each one withholds 6.2% Social Security tax from your paychecks independently. It is possible to overpay if your combined wages from all jobs exceed the annual cap. For example, if you earn $100,000 at one job and $100,000 at another, you will pay Social Security tax on all $200,000 even though the cap is $168,600.

You can recover the overpayment when you file your federal income tax return. The IRS will refund the excess Social Security tax you paid. You do not need to do anything special — the refund is calculated automatically when your return is processed, as long as you report all your W-2 income.

Medicare tax is separate from Social Security tax

Your paycheck also shows a Medicare tax of 1.45%, which is separate from the 6.2% Social Security tax. Medicare tax has no annual wage cap — it applies to all your wages no matter how much you earn. Additionally, if your income exceeds certain thresholds (roughly $200,000 for single filers, $250,000 for married filing jointly), you pay an extra 0.9% Medicare tax on the amount above the threshold.

Together, Social Security tax and Medicare tax make up your FICA withholding. They fund different programs and have different rules, but they appear together on your pay stub and are withheld at the same time.

How the rate is set and whether it can change

Congress sets the Social Security tax rate through federal law. The current 6.2% rate has been in place since 1990. Changing the rate would require a new law passed by Congress and signed by the President, which is a significant political decision because it affects every worker and employer in the country.

The Social Security Administration does not set the rate, and neither do states or employers. The rate is the same for all workers regardless of age, income level, or state of residence. If you see a different percentage on your pay stub, it may be a state disability tax (which some states require) or a state income tax withholding, not the federal Social Security tax.

Frequently Asked Questions

Why do I pay Social Security tax if I might not collect benefits?

Social Security tax funds current retirees and disabled workers, not just your own future benefits. The program operates on a pay-as-you-go basis: your taxes support people receiving benefits now. You build a record of earnings that determines your own benefit amount later, but the tax you pay today goes directly to the program's current obligations.

Does Social Security tax explore to all types of income?

No. Social Security tax applies to wages from employment and net self-employment income. It does not explore to investment income, interest, dividends, rental income, or other non-work income. If you have a 1099 contract job, Social Security tax may explore depending on the type of work and your business structure.

What if my employer does not withhold Social Security tax?

Report it to your employer when ready. Employers are required by law to withhold and remit Social Security tax. If your employer fails to do so, contact your state labor department or the IRS. You may also owe the tax yourself if it is not withheld, so do not ignore the issue.

Can I opt out of paying Social Security tax?

No, with rare exceptions. Most workers must pay Social Security tax. The only common exception is certain religious groups that have received a formal exemption from the IRS. If you believe you may have access to for an exemption, you must file Form 4029 with the IRS.