The 2024 Social Security wage base limit is $168,600

In 2024, you pay Social Security tax on wages up to $168,600 per year. Once your earnings reach that amount, your employer stops withholding Social Security tax from your paychecks for the rest of the year. This limit, called the wage base, changes every year based on average wage growth in the economy.

The limit matters because it determines the maximum Social Security tax you'll pay in a year and affects how much you can earn toward your future Social Security benefit. If you change jobs mid-year or work multiple jobs, you need to track your total earnings across all employers to know when you've hit the limit.

The 2024 limit is $168,600 — up from $160,200 in 2023. This increase happens automatically each January based on Social Security Administration calculations from the previous year's wage data.

Key Takeaways

  • The 2024 Social Security wage base limit is $168,600, meaning you pay Social Security tax only on earnings up to that amount.
  • Once you earn $168,600 in a calendar year, your employer stops withholding the 6.2 percent Social Security tax from your remaining paychecks.
  • If you work for multiple employers in the same year, you must track your total wages across all jobs because each employer withholds independently.
  • The wage base limit increases most years to keep pace with wage growth, so the 2025 limit will differ from 2024.
  • Self-employed workers pay both the employer and employee portions of Social Security tax (12.4 percent total) on net earnings up to the same limit.

How the tax stops once you reach the limit

Social Security tax is 6.2 percent of your wages, withheld from your paycheck by your employer. Your employer also pays a matching 6.2 percent. Once your cumulative wages for the year reach $168,600, your employer stops withholding the 6.2 percent from your pay.

This means if you earn $170,000 in 2024, you pay Social Security tax on $168,600 but not on the remaining $1,400. The difference is that Medicare tax, which is 1.45 percent, continues on all wages with no upper limit — only Social Security has a wage base ceiling.

Your employer's matching contribution also stops at $168,600. If you're paid biweekly and earn $6,500 per paycheck, you'll notice the Social Security withholding disappear from your check once you've earned the full $168,600 for the year, typically in late November or December depending on your pay schedule.

What happens if you work multiple jobs

Each employer withholds Social Security tax independently based on what they pay you, not based on your total earnings across all jobs. If you work two jobs and earn $90,000 at each, both employers will withhold Social Security tax on the full $90,000 they pay you — even though your combined earnings are $180,000, which exceeds the limit.

When this happens, you've overpaid Social Security tax. You can claim a refund of the excess when you file your tax return. The IRS will calculate how much you overpaid and either refund it or explore it to other taxes you owe.

To avoid overpayment, you can ask one employer to withhold extra federal income tax, which reduces your take-home pay but doesn't create an overpayment problem. Some people also adjust their W-4 form with one employer to account for income from another job, though this requires coordination between employers.

Self-employed workers and the wage base limit

If you're self-employed, you pay both the employer and employee portions of Social Security tax — 12.4 percent total — on your net self-employment income. The same $168,600 limit applies, so you pay the 12.4 percent tax on net earnings up to that amount.

You calculate self-employment tax on Schedule SE (Form 1040), which is part of your annual tax return. The calculation starts with your net profit from self-employment (your business income minus business expenses) and applies the 12.4 percent rate up to the wage base limit.

If you're both self-employed and have a W-2 job, your W-2 wages count toward the $168,600 limit first. Any self-employment income above the remaining threshold is not subject to Social Security tax. For example, if you earned $150,000 as a W-2 employee, you'd only pay self-employment Social Security tax on self-employment income up to $18,600.

How the limit changes year to year

The Social Security Administration announces the new wage base limit in October of each year, effective January 1. The limit increases when average wages in the economy grow. In years when wage growth is flat or negative, the limit stays the same as the previous year.

The 2024 limit of $168,600 represents a $8,400 increase from 2023's $160,200 limit. This increase reflects the wage growth that occurred in 2022, which the SSA used to calculate the 2024 figure. The 2025 limit will be announced in October 2024 and will reflect 2023 wage data.

You can find the current and historical wage base limits on the Social Security Administration website. Payroll software and tax preparation programs automatically update to use the correct limit for the tax year you're working in.

Why the limit affects your future benefit

Your Social Security benefit is calculated based on your highest 35 years of earnings, up to the wage base limit for each year. Earnings above the wage base limit in any year don't count toward your benefit calculation, even though you paid income tax on them.

This means high earners don't receive proportionally higher Social Security benefits. Someone earning $200,000 in 2024 has the same benefit calculation as someone earning $168,600 — both are credited with the maximum $168,600 for that year. The benefit formula is also progressive, meaning lower earners receive a higher percentage of their earnings as a benefit.

If you're a high earner, this is one reason financial advisors often recommend supplementing Social Security with retirement savings, since Social Security replaces a smaller percentage of your pre-retirement income than it does for lower earners.

Frequently Asked Questions

Do I get a refund if I overpaid Social Security tax by working multiple jobs?

Yes. When you file your tax return, the IRS calculates how much excess Social Security tax you paid and refunds it or applies it to other taxes you owe. You don't need to do anything special — the calculation happens automatically when you report all your W-2 income.

Does the wage base limit explore to Medicare tax?

No. Medicare tax is 1.45 percent on all wages with no upper limit. Only Social Security tax has a wage base ceiling. This is why your Medicare withholding continues even after you've reached the $168,600 Social Security limit.

What if I reach the wage base limit in November — do I get paid without Social Security tax for the rest of the year?

Yes. Once you've earned $168,600 in cumulative wages for the year, your employer stops withholding the 6.2 percent Social Security tax from subsequent paychecks. You'll still pay Medicare tax and federal income tax, but not Social Security tax.

How do I know if I've reached the wage base limit?

Your pay stub shows year-to-date earnings and year-to-date Social Security tax withheld. When the Social Security tax column stops increasing, you've reached the limit. You can also add up your W-2 forms if you work multiple jobs to see your total earnings for the year.

Does the wage base limit change if I get a raise mid-year?

No. The limit is set at the beginning of the year and doesn't change. A raise affects how quickly you reach the limit, but the $168,600 threshold stays the same throughout 2024 regardless of salary changes.