What you pay depends on your income and employment status
Social Security tax is taken from your paycheck at a rate of 6.2% of your wages. Your employer matches that amount, contributing another 6.2%, for a total of 12.4% going into the Social Security system. If you are self-employed, you pay both portions yourself — 12.4% total — though you can deduct half of it on your tax return.
The tax only applies to earnings up to a certain amount each year. In 2024, you pay Social Security tax on income up to $168,600. Any wages above that threshold are not subject to Social Security tax. This means higher earners pay a smaller percentage of their total income into the system, while lower and middle-income workers pay on all their earnings.
Once you reach full retirement age and start collecting Social Security benefits, the rules change. If you continue working, you may owe taxes on your benefits themselves, depending on your total income. But the 6.2% payroll tax continues to be withheld from your wages regardless of whether you are receiving benefits.
Key Takeaways
- Social Security tax is 6.2% of your wages, withheld automatically from your paycheck, with your employer contributing an equal 6.2%.
- The tax applies only to earnings below the annual wage cap, which was $168,600 in 2024 and changes each year.
- Self-employed workers pay the full 12.4% themselves but can deduct half of it as a business expense.
- The amount you pay now does not directly determine your benefit amount — your benefit is based on your 35 highest-earning years.
How the wage cap works and who it affects
The wage cap is an annual limit on the income subject to Social Security tax. It rises each year based on national wage growth. In 2024 it was $168,600; in 2023 it was $160,200. The Social Security Administration announces the new cap in October for the following year.
If you earn $168,600 or less in a year, you pay Social Security tax on all of it. If you earn $200,000, you pay the tax only on the first $168,600 — the remaining $31,400 is not subject to Social Security tax. This means a person earning $200,000 pays a lower overall tax rate than someone earning $100,000, even though both pay the same dollar amount on their first $168,600.
High earners are not the only ones affected. If you work multiple jobs in the same year, you may temporarily pay more than you owe. For example, if Job A pays you $100,000 and Job B pays you $80,000, you will pay Social Security tax on all $180,000 even though the cap is $168,600. You can claim a credit for the overpayment when you file your tax return.
What happens if you work while receiving benefits
If you start collecting Social Security before your full retirement age and continue working, Social Security withholds $1 from your benefit for every $2 you earn above an annual limit. In 2024, that limit was $23,400. The year you reach full retirement age, the withholding changes to $1 for every $3 earned above a higher limit, and only counts earnings before the month you reach full retirement age.
Once you reach full retirement age, you can earn any amount without any reduction to your benefits. The 6.2% payroll tax continues to come out of your paycheck, but it no longer affects your benefit payments.
You may also owe income tax on your Social Security benefits if your total income is high enough. This is separate from the payroll tax. The calculation depends on your "combined income" — your adjusted gross income plus nontaxable interest plus half your Social Security benefits. If you are single and your combined income exceeds $25,000, some of your benefits become taxable.
Self-employed workers and Social Security tax
If you are self-employed, you pay self-employment tax, which includes both the employee and employer portions of Social Security tax. The rate is 12.4% for Social Security and 2.9% for Medicare, totaling 15.3% on net self-employment income.
You calculate self-employment tax on your net profit — your business income minus business expenses — reported on Schedule C of your tax return. The same wage cap applies: in 2024, you pay the 12.4% Social Security portion only on net earnings up to $168,600.
The tax code allows you to deduct half of your self-employment tax as an adjustment to income on your tax return. This reduces your taxable income and partially offsets the higher rate you pay compared to traditional employees. You report self-employment tax on Schedule SE and transfer it to your Form 1040.
How much you have paid over your working life
You can see a record of all Social Security taxes you have paid by creating an account on ssa.gov and viewing your Social Security Statement. This statement shows your earnings history year by year and estimates your future benefits based on your current earnings record.
The statement is useful for checking accuracy. If you spot an error — a missing year, an employer name that is wrong, or earnings that seem too low — contact Social Security to correct it. Errors in your earnings record directly affect the benefit amount you receive later, so it is worth verifying while you are still working.
Your lifetime Social Security taxes do not create a personal account that you draw from. Instead, current workers' taxes pay current retirees' benefits. Your own benefit is calculated using a formula based on your 35 highest-earning years, not on the total amount you paid in.
Medicare tax and how it differs from Social Security tax
Medicare tax is separate from Social Security tax, though both are withheld from your paycheck. The Medicare portion is 2.9% of all your wages with no annual cap — you pay it on every dollar you earn, no matter how high your income.
Your employer matches the 2.9% Medicare tax as well. If you earn more than $200,000 as a single filer (or $250,000 if married filing jointly), an additional 0.9% Medicare tax applies to the income above those thresholds. This additional tax is not matched by employers.
Unlike Social Security, Medicare tax continues throughout your working life and does not stop at a wage cap. The money funds Medicare Part A, which covers hospital care. When you turn 65, you become may be able to access for Medicare regardless of whether you have claimed Social Security benefits.
Questions to ask your employer or tax preparer
If you are unsure whether your Social Security tax is being calculated correctly, ask your payroll department to confirm the rate and the wage cap for the current year. If you have multiple jobs, ask each employer whether they are aware of your other employment, since that affects whether you might overpay.
If you are self-employed, a tax preparer can help you understand how to calculate self-employment tax correctly and whether you are taking all available deductions. If you have questions about how your earnings record affects your future benefits, Social Security can answer those directly.
Frequently Asked Questions
Why do I pay Social Security tax if I might not collect benefits?
Social Security tax funds current retirees' benefits, not a personal savings account. You pay into the system as a worker and receive benefits later if you meet the requirements. Most people who work long enough do collect benefits, though the amount depends on your earnings history and when you claim.
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 a formal exemption from the IRS.
Does paying more Social Security tax mean I get a bigger benefit?
Not directly. Your benefit is based on your 35 highest-earning years, adjusted for inflation. Earning more in those years increases your benefit, but only up to the wage cap. Earnings above the cap do not increase your benefit amount.
What if I did not pay Social Security tax for some years?
Social Security uses your 35 highest-earning years to calculate your benefit. If you have fewer than 35 years of earnings, zeros are included in the calculation, which lowers your benefit. You need at least 10 years of earnings (40 work credits) to be may be able to access for retirement benefits at all.
Do I pay Social Security tax on tips and bonuses?
Yes. Social Security tax applies to all wages and compensation, including tips, bonuses, and most fringe benefits. Your employer should include these on your W-2 form, and the tax is withheld the same way as regular wages.