The Social Security tax rate is 6.2 percent of your wages

Social Security tax takes 6.2 percent of your gross pay, up to a yearly earnings cap. Your employer matches that 6.2 percent on their side — so the total into the system is 12.4 percent, but you only see 6.2 percent come out of your paycheck. The earnings cap changes each year; in 2024 it is $168,600, meaning once you earn that much in a calendar year, no more Social Security tax is withheld from your remaining paychecks that year.

This is separate from Medicare tax, which is 1.45 percent of all your wages with no cap. Together, Social Security and Medicare are called FICA taxes — Federal Insurance Contributions Act. When you see "FICA" on your pay stub, that line includes both.

The 6.2 percent rate has been the same since 1990. Congress sets the rate by law, and changing it requires a new law. The earnings cap is adjusted annually based on average wage growth in the country.

Key Takeaways

  • You pay 6.2 percent of your wages in Social Security tax, and your employer pays an equal 6.2 percent on your behalf.
  • The earnings cap means once you reach a certain yearly income, no more Social Security tax is taken from your pay for the rest of that calendar year.
  • The 6.2 percent rate is set by federal law and has not changed since 1990.
  • Self-employed people pay both the employee and employer portions — 12.4 percent total — but can deduct half of it on their taxes.

Why there is an earnings cap and how it affects high earners

The earnings cap exists because Social Security was designed as a wage-replacement program, not a flat benefit. The idea is that the program replaces a percentage of your pre-retirement income, so there is less reason to tax income above a certain level. Once you hit the cap, your benefit at retirement does not grow any larger, so additional earnings above the cap do not add to your Social Security account.

For 2024, the cap is $168,600. If you earn $200,000 in a year, you pay Social Security tax only on the first $168,600. The remaining $31,400 is not subject to Social Security tax, though it is still subject to Medicare tax. If you work for multiple employers in the same year and your combined earnings exceed the cap, you may overpay Social Security tax — but you can claim a credit for the overpayment when you file your income tax return.

How self-employed people calculate their Social Security tax

If you are self-employed, you pay both the employee and employer portions of Social Security tax. That is 12.4 percent total on your net self-employment income, not 6.2 percent. You report this on Schedule SE (Self-Employment Tax) when you file your income tax return.

The law allows you to deduct half of your self-employment tax as a business expense on your income tax return, which reduces your overall tax burden. You still pay the full 12.4 percent into Social Security, but the deduction lowers your taxable income for federal income tax purposes. The earnings cap applies to self-employed income the same way it applies to wages — once your net self-employment income reaches the yearly cap, no more Social Security tax is owed on income above that.

What the tax funds and where the money goes

Social Security tax funds three programs: retirement benefits, disability benefits, and survivor benefits. When you pay 6.2 percent into Social Security, you are not building a personal account that sits in your name. Instead, the money goes into a trust fund that pays current beneficiaries — retirees, disabled workers, and survivors of deceased workers. Your future benefits will be paid from taxes collected from future workers.

The Social Security Administration publishes annual reports on the trust fund balance and projections for when income will fall short of payouts. As of now, the trust fund has reserves, but those reserves are projected to be depleted sometime in the 2030s if no changes are made to the tax rate, benefit levels, or earnings cap. Congress would need to pass new legislation to address this, but the timing and form of any change remain uncertain.

How your earnings record affects your future benefit amount

Social Security calculates your retirement benefit based on your highest 35 years of earnings. The system takes your gross wages (before taxes) and adjusts them for inflation using a formula. Years you did not work count as zero, which is why gaps in your work history lower your average. The more you earned in your highest-earning years, the higher your benefit will be at retirement.

You can view your earnings record online through your personal Social Security account at ssa.gov. The record shows what the Social Security Administration has on file for each year you worked. If you spot an error — a missing year, a year with too-low earnings, or earnings attributed to the wrong person — you can report it and request a correction. Errors are more common than many people realize, especially if you changed your name, worked under a different name, or had identity theft.

Frequently Asked Questions

What happens to Social Security tax if I work part-time or have multiple jobs?

Each employer withholds 6.2 percent based on what you earn from them. If your combined earnings from all jobs exceed the yearly cap, you may overpay Social Security tax. When you file your income tax return, you can claim a credit for the overpayment, and the IRS will refund it to you.

Do I pay Social Security tax on bonuses and overtime?

Yes. Social Security tax applies to all wages and salary, including bonuses, overtime, commissions, and tips. The only limit is the yearly earnings cap — once you reach it, no more tax is withheld, regardless of the type of income.

Can I opt out of paying Social Security tax?

No. Social Security tax is mandatory for all employees and self-employed people. There is no option to stop paying it or to redirect the money elsewhere. The only exception is certain government employees hired before specific dates who are covered by their own pension systems instead.

Does the Social Security tax rate ever change?

The rate is set by federal law and has been 6.2 percent since 1990. Congress would need to pass new legislation to change it. The earnings cap changes every year based on wage growth, but the percentage rate itself has remained stable for over 30 years.

How is Social Security tax different from income tax?

Social Security tax is a flat 6.2 percent up to the earnings cap and funds only Social Security benefits. Income tax is progressive (higher earners pay a higher percentage) and funds general government operations. Both are withheld from your paycheck, but they are separate taxes that go to different places.