Social Security taxes are the money taken from your paycheck to fund the program
Social Security tax is a percentage of your wages that your employer withholds and sends to the federal government. The money does not sit in an account with your name on it. Instead, it goes into a single fund that pays benefits to people who are retired, disabled, or whose family members have died. You pay into the system while you work, and the current workers' taxes pay the people receiving benefits right now.
The tax rate has been the same since 1990: 6.2% of your wages up to a certain income limit. Your employer also pays 6.2% on your behalf — that is 12.4% total, though you only see the 6.2% taken from your check. If you are self-employed, you pay both portions yourself, which is 15.3% of your net earnings (the 12.4% for Social Security plus 2.9% for Medicare).
The income limit changes each year. In 2024, you pay Social Security tax only on earnings up to $168,600. Anything you earn above that amount is not subject to the tax. This means higher earners pay a smaller percentage of their total income into the system.
Key Takeaways
- Social Security tax is 6.2% of your wages, withheld from your paycheck, with your employer contributing an equal 6.2%.
- The money you pay does not go into a personal account — it funds current benefits for retirees, disabled workers, and survivors.
- You only pay the tax on earnings up to an annual limit, which changes each year and was $168,600 in 2024.
- Your work record and the amount you paid in taxes determine how much you receive in benefits later.
- Self-employed people pay both the employee and employer portions, totaling 15.3% when combined with Medicare tax.
How much Social Security tax you pay depends on your income
The amount taken from each paycheck is straightforward to calculate: 6.2% of your gross wages, up to the annual earnings limit. If you earn $50,000 a year, you pay $3,100 in Social Security tax. If you earn $200,000 a year, you pay the tax only on the first $168,600 (in 2024), which is $10,453.20, not on the full amount.
Your pay stub should show the amount withheld as "Social Security" or "OASDI" (Old-Age, Survivors, and Disability Insurance). If you work for more than one employer in the same year, each one withholds 6.2% up to the limit. This can mean you pay slightly more than you should if your combined earnings exceed the limit. You can claim the overpayment as a credit on your tax return.
The earnings limit 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. You can find the current limit on the Social Security website or ask your payroll department.
What happens to the money you pay in
Social Security operates on a pay-as-you-go system. The taxes you pay this month go directly to pay benefits for people receiving Social Security right now — retirees, disabled workers, and the surviving spouses and children of workers who have died. You are not building up a personal savings account.
The Social Security Trust Fund holds a reserve to cover the difference between what comes in and what goes out each month. When more people are working and paying in than are receiving benefits, the fund grows. When more people are receiving benefits than are paying in, the fund shrinks. The trustees report on the fund's status each year.
The amount you paid in over your working life determines how much you receive in benefits. The Social Security Administration tracks your earnings record and uses your highest 35 years of earnings to calculate your benefit amount. If you worked fewer than 35 years, zeros are counted for the missing years, which lowers your benefit.
How your work record affects your future benefits
To receive Social Security retirement benefits, you need at least 40 work credits. You earn one credit for every $1,730 you earn in a year (this amount changes annually). Most people earn four credits per year, which means you need about 10 years of work to may have access to. The credits do not have to be consecutive — gaps in employment do not erase the credits you already earned.
Your benefit amount is based on your average earnings over your highest 35 working years. If you worked longer than 35 years, only your highest-earning years count. This is why working longer can increase your benefit — your lowest-earning years drop out of the calculation. If you have fewer than 35 years of earnings, the missing years count as zero, which reduces your average.
You can check your earnings record and estimated benefit amount by creating an account on the Social Security website. The statement shows your work history, the taxes you paid, and an estimate of what you might receive at different ages. You should review it every few years to make sure the information is correct.
Medicare tax is separate from Social Security tax
Your paycheck also has a Medicare tax withheld, which is different from Social Security tax. Medicare tax is 1.45% of your wages with no earnings limit — you pay it on every dollar you earn. Your employer also pays 1.45%. If you earn more than $200,000 (or $250,000 if married filing jointly), you pay an additional 0.9% Medicare tax on the amount above that threshold.
Medicare tax funds the Medicare program, which provides health insurance to people 65 and older and some younger people with disabilities. It is a separate system from Social Security, though both are deducted from your paycheck. On your pay stub, you will see them listed separately as "Social Security" and "Medicare" or "FICA".
What to ask your employer or the Social Security Administration
If you do not see Social Security tax on your pay stub, ask your payroll department why. Some workers, such as certain government employees, may be covered by different retirement systems and do not pay Social Security tax. If you are unsure whether you are paying the correct amount, your employer's payroll office can explain your deductions.
If you think there is an error in your earnings record — a missing year, a misspelled name, or wages that were not reported — contact the Social Security Administration. You can call 1-800-772-1213 or visit your local Social Security office. Bring your Social Security card and a recent pay stub or tax return. Errors can be corrected, but it is easier to catch them early.
You can also ask the Social Security Administration for a detailed breakdown of how your benefit amount is calculated. They will show you which years counted toward your benefit and what your estimated payment would be at different ages. This helps you understand whether working longer would increase your benefit.
Frequently Asked Questions
Can I get a refund of Social Security taxes I paid?
No. Social Security taxes are not refundable. The money you paid in is used to fund current benefits. You cannot withdraw it or pass it to your heirs if you die before claiming benefits. However, if you were over-withheld because you worked for multiple employers, you can claim the overpayment on your tax return.
What if I did not work long enough to earn 40 credits?
You will not receive Social Security retirement benefits based on your own work record. However, you may be able to receive benefits as a spouse or surviving family member of someone who did work long enough. Contact the Social Security Administration to learn what you might be may have access to to.
Does Social Security tax explore to all types of income?
No. Social Security tax applies only to wages from employment and self-employment income. It does not explore to investment income, rental income, interest, or dividends. If you have multiple income sources, only the wages and self-employment earnings are subject to the tax.
What happens to Social Security taxes if I move to another country?
You continue to pay Social Security tax on U.S. wages even if you move abroad. If you work for a foreign employer, you generally do not pay U.S. Social Security tax. However, some countries have agreements with the United States that allow workers to count time in both countries toward their benefits. Ask the Social Security Administration about your specific situation.
Will the Social Security tax rate increase in the future?
The tax rate has been 6.2% since 1990 and Congress would have to pass a law to change it. The Social Security trustees have warned that the Trust Fund reserves will be depleted around 2034 if no changes are made, but that does not automatically mean the rate will increase. Congress may adjust the earnings limit, the benefit formula, or the retirement age instead.