Social Security tax is a payroll tax that funds the Social Security program

Social Security tax is money taken from your paycheck to fund the Social Security program, which pays retirement benefits, disability benefits, and survivor benefits. The current rate is 6.2% of your wages, and your employer pays an equal 6.2% on your behalf — for a total of 12.4% when combined. If you are self-employed, you pay both the employee and employer portions yourself, which comes to 12.4% of your net earnings.

The Social Security Administration (SSA) uses the money you and your employer pay to fund benefits for people who are currently retired, disabled, or the surviving family members of workers who have died. The amount you pay in Social Security tax over your working years determines how much you can receive in benefits later.

Key Takeaways

  • Social Security tax is 6.2% of your wages if you are an employee, with your employer paying an equal 6.2%.
  • Self-employed workers pay the full 12.4% themselves on their net business earnings.
  • There is a wage cap each year — you only pay Social Security tax on earnings up to that limit, which changes annually.
  • The money you pay in goes to current beneficiaries, and your own future benefits are based on your earnings record.
  • Social Security tax appears on your pay stub as "OASDI" or "Social Security" and is separate from Medicare tax and income tax.

How much Social Security tax you pay depends on your income

Your Social Security tax is calculated on your gross wages — the amount before taxes and deductions are taken out. If you earn $50,000 in a year, you pay 6.2% of that $50,000, which is $3,100. Your employer then pays another $3,100 on your behalf.

However, there is a wage cap. Each year, the SSA sets a maximum amount of earnings subject to Social Security tax. For 2024, that cap is $168,600. This means if you earn $200,000 in a year, you only pay Social Security tax on the first $168,600 of your income. Once you reach the cap in a given year, no more Social Security tax is taken from your remaining paychecks that year. The wage cap changes every year based on national wage trends.

If you have multiple jobs, you may pay Social Security tax to the cap at each job. For example, if you earn $100,000 at one job and $80,000 at another, you will pay Social Security tax on all earnings at both jobs because your combined income exceeds the cap. You can claim a credit on your tax return for any overpayment.

Where Social Security tax appears on your paycheck

When you look at your pay stub, Social Security tax usually appears as a line item labeled "Social Security," "OASDI" (Old-Age, Survivors, and Disability Insurance), or sometimes "SS." It is separate from federal income tax withholding and from Medicare tax, which is 1.45% of your wages.

Your employer deducts Social Security tax from your gross pay before you receive your paycheck. The amount withheld is sent to the SSA along with your employer's matching contribution. Self-employed workers report their Social Security tax on Schedule SE (Self-Employment Tax) when they file their annual tax return.

How Social Security tax connects to your future benefits

The Social Security tax you pay is recorded under your Social Security number in the SSA's earnings record. The SSA uses your 35 highest-earning years to calculate your retirement benefit amount. If you have fewer than 35 years of earnings, zeros are counted for the missing years, which lowers your benefit.

You need at least 40 credits to be may have access to to retirement benefits. You earn one credit for each $1,640 of wages in 2024 (the credit amount changes yearly). Most people earn four credits per year, which means you need about 10 years of work to become may have access to to retirement benefits. The same earnings record is used to determine disability and survivor benefits if you become unable to work or if your family members need benefits after your death.

Self-employed workers and Social Security tax

If you are self-employed, you pay Social Security tax on your net business income — your revenue minus business expenses. You pay both the employee portion (6.2%) and the employer portion (6.2%), for a total of 12.4%. However, you can deduct half of your self-employment tax when calculating your adjusted gross income on your tax return, which provides some tax relief.

Self-employed workers report their earnings and self-employment tax on Schedule C (Profit or Loss from Business) and Schedule SE when filing their annual tax return. The same wage cap applies: in 2024, you only pay self-employment tax on the first $168,600 of net earnings.

The difference between Social Security tax and other payroll taxes

Social Security tax is one of several payroll taxes taken from your check. Medicare tax is another — it is 1.45% of your wages with no wage cap, meaning you pay it on all your earnings no matter how much you make. Your employer also pays 1.45% for Medicare. Together, Social Security and Medicare taxes are sometimes called FICA taxes (Federal Insurance Contributions Act).

Federal income tax withholding is separate from both. The amount withheld depends on your W-4 form and your income level. Some states also collect state income tax. Social Security tax, by contrast, is a fixed percentage with a wage cap, and the money goes specifically to the Social Security trust fund rather than to general government revenue.

What happens to the money you pay in Social Security tax

Social Security tax goes into the Social Security Trust Fund, which is divided into two accounts: the Old-Age and Survivors Insurance (OASI) Trust Fund and the Disability Insurance (DI) Trust Fund. The money collected is used to pay current beneficiaries — retirees, disabled workers, and their families. It is not held in an individual account with your name on it.

The SSA publishes annual reports on the trust fund's status. In recent years, the program has paid out more in benefits than it collects in taxes, which means the trust fund balance has been declining. However, the program continues to collect payroll taxes and pay benefits. The long-term solvency of Social Security depends on future policy decisions by Congress.

Frequently Asked Questions

Why is Social Security tax taken from my paycheck if I might not receive benefits?

Social Security tax funds the current program for today's retirees and disabled workers, not just your own future benefits. The program operates on a pay-as-you-go basis. Even if you never claim retirement benefits, your contributions support the system. Additionally, you may be may have access to to survivor benefits if you die, or disability benefits if you become unable to work, regardless of your age.

Can I opt out of paying Social Security tax?

No. Social Security tax is mandatory for all employees and self-employed workers in the United States. The only exceptions are certain government employees hired before specific dates and some religious groups that have received an exemption from the Internal Revenue Service. If you are a W-2 employee or self-employed, you must pay.

What is the wage cap and why does it exist?

The wage cap is the maximum amount of earnings subject to Social Security tax in a given year. In 2024, it is $168,600. The cap exists because Social Security was designed to replace a portion of average earnings, not to tax all income equally. High earners pay a smaller percentage of their total income in Social Security tax than lower earners do. The cap is adjusted annually based on national wage growth.

If I overpay Social Security tax, how do I get it back?

If you worked multiple jobs and paid Social Security tax beyond the annual wage cap, you can claim a credit on your federal tax return. You will not receive a refund directly from Social Security — instead, the overpayment reduces your federal income tax liability. You claim this on Form 1040 when you file your taxes.

Does Social Security tax count toward my income tax?

No. Social Security tax and federal income tax are separate. The amount withheld for Social Security does not reduce the amount of federal income tax you owe. However, self-employed workers can deduct half of their self-employment tax (which includes the Social Security portion) when calculating their adjusted gross income, which does lower their taxable income.