Your Social Security tax rate is 6.2 percent of your wages, taken from your paycheck before you see it

The Social Security tax rate is 6.2 percent of your gross wages. Your employer withholds this amount directly from your paycheck and sends it to the Social Security Administration. If you are self-employed, you pay both the employee and employer portions—12.4 percent total—though you can deduct half of it when you file taxes.

The 6.2 percent applies only to wages up to a certain limit, which changes each year. In 2024, that limit is $168,600. Once your earnings pass that threshold in a calendar year, no more Social Security tax is withheld from your remaining paychecks that year. This is different from Medicare tax, which has no wage cap and continues at 1.45 percent on all earnings.

You see this on your pay stub as "FICA" or "Social Security tax." FICA stands for Federal Insurance Contributions Act, the law that created these payroll taxes. The money you pay in now builds your Social Security benefit record, which determines how much you receive when you retire, become disabled, or if your family receives survivor benefits.

Key Takeaways

  • Social Security tax is 6.2 percent of your wages, withheld automatically from each paycheck up to the annual wage limit.
  • The wage limit changes yearly—in 2024 it is $168,600, meaning earnings above that amount are not subject to Social Security tax.
  • Self-employed workers pay 12.4 percent total (both employee and employer shares) but can deduct half when filing taxes.
  • The tax you pay now builds your Social Security record, which determines your retirement, disability, and survivor benefits later.

How the wage cap works

The Social Security wage cap is an annual limit on how much of your income is taxed for Social Security. In 2024, that limit is $168,600. This means if you earn $200,000 in a year, you pay Social Security tax only on the first $168,600 of that income. The remaining $31,400 is not subject to Social Security tax.

The wage cap increases most years because it is tied to the national average wage. The Social Security Administration announces the new limit in October for the following year. If you work for multiple employers in the same year, you may temporarily overpay if your combined wages cross the threshold—but you can claim a credit for the overpayment when you file your federal income tax return.

Self-employed Social Security tax

If you are self-employed, you pay both the employee portion (6.2 percent) and the employer portion (6.2 percent) of Social Security tax, for a total of 12.4 percent. This is called self-employment tax. You calculate it on Schedule SE when you file your annual tax return, using your net business income.

The good news is that you can deduct half of your self-employment tax when you calculate your adjusted gross income. This reduces your taxable income and lowers your overall tax bill. You still pay the full 12.4 percent, but the deduction softens the impact. The wage cap still applies—once your net self-employment income reaches $168,600 in 2024, no additional Social Security tax is owed on income above that.

Why Social Security tax has a wage cap

Congress set the wage cap to limit how much high earners contribute to Social Security while keeping the program's benefit structure progressive. Social Security benefits are not based on how much you paid in—they are calculated using a formula that replaces a higher percentage of lower earners' income than higher earners' income. The wage cap reflects this philosophy.

Because the cap exists, a person earning $200,000 pays the same total Social Security tax as a person earning $168,600. A person earning $1 million pays the same amount as well. This means higher earners contribute a smaller percentage of their total income to Social Security than lower earners do.

The difference between Social Security and Medicare tax

Social Security tax and Medicare tax are both withheld from your paycheck under the FICA umbrella, but they fund different programs and have different rules. Social Security tax is 6.2 percent and stops at the wage cap. Medicare tax is 1.45 percent and has no wage cap—it applies to all your earnings, no matter how much you make.

Higher earners also pay an additional 0.9 percent Medicare tax on wages above $200,000 (single filers) or $250,000 (married filing jointly). This extra tax does not go into your Medicare account; it goes into the general Medicare trust fund. Social Security tax, by contrast, is credited directly to your individual Social Security record and determines your future benefits.

How your Social Security tax builds your benefit record

Every dollar of Social Security tax you pay is credited to your Social Security record. The Social Security Administration tracks your earnings year by year. To receive Social Security retirement benefits, you need at least 40 credits, which is roughly 10 years of work at current wage levels. The more you earn and pay in, the higher your future benefit amount will be.

Your benefit is calculated using your 35 highest-earning years. If you worked fewer than 35 years, zeros are included in the calculation, which lowers your benefit. If you worked more than 35 years, the lowest-earning years are dropped. This is why people who take time out of the workforce—for caregiving, education, or other reasons—may see a lower benefit amount than someone with consistent earnings.

What happens if you overpay Social Security tax

If you work for multiple employers in the same year and your combined wages exceed the wage cap, you may overpay Social Security tax. For example, if you earn $100,000 at one job and $80,000 at another, your total is $180,000. You will pay Social Security tax on all $180,000 across both jobs, even though the cap is $168,600.

You can recover the overpayment by claiming it as a credit on your federal income tax return. You do not receive a refund of the overpayment automatically—you must file your return and claim the credit. If you are due a refund for other reasons, the overpayment credit reduces your tax liability or increases your refund. Keep your pay stubs from all employers to verify the total amount withheld.

Frequently Asked Questions

Does Social Security tax explore to all types of income?

Social Security tax applies to wages and self-employment income. It does not explore to investment income, rental income, or capital gains. If you earn money from a job or run a business, that income is subject to Social Security tax up to the annual wage cap.

Can I opt out of paying Social Security tax?

No. Social Security tax is mandatory for all employees and self-employed workers. The only exceptions are certain government employees hired before specific dates and some religious groups that have received exemptions, but these are rare and require formal approval from the IRS.

What if I did not work a full year—do I still pay Social Security tax?

Yes. Social Security tax is withheld from every paycheck, regardless of how many months you worked. If you earned wages, your employer withheld Social Security tax. You build credits toward Social Security based on your annual earnings, not the number of months worked.

Does the Social Security tax rate ever change?

The 6.2 percent rate has been the same since 1990. Congress would need to pass new legislation to change it. The wage cap changes annually, but the tax rate itself is fixed by law. Any change to the rate would require a vote in Congress.

How do I check how much Social Security tax I have paid?

You can create an account on ssa.gov and view your Social Security Statement, which shows your earnings history and estimated benefits. Your pay stubs also show the Social Security tax withheld from each paycheck. The Social Security Administration uses your earnings record to calculate your future benefits.