What the 2024 Social Security tax changes mean for your paycheck
Social Security's tax rate — the percentage taken from your wages — stayed at 6.2 percent in 2024, the same as it has been since 1990. What changed is the wage base, the maximum amount of your annual earnings subject to the tax. In 2024, that cap rose to $168,600, up from $160,200 in 2023. This means higher earners pay Social Security tax on more of their income than they did the year before.
The wage base increases each year based on average wage growth in the economy. The Social Security Administration announces the new cap in October for the following year. If you earn less than the wage base, this change does not affect you. If you earn more, you will see Social Security tax withheld on the additional income up to the new cap.
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 wage base. The same increase applies to them.
Key Takeaways
- The Social Security tax rate remains 6.2 percent for employees and 12.4 percent for self-employed workers; only the wage base cap changed in 2024.
- The 2024 wage base is $168,600, meaning earnings above that amount are not subject to Social Security tax for the year.
- The wage base increases annually based on national average wage growth, so the cap will be different in 2025 and beyond.
- Higher earners are affected by the wage base increase; workers earning below the cap see no change in their tax burden.
How the wage base cap works and who it affects
The wage base is a ceiling, not a rate change. Once your earnings reach $168,600 in 2024, no further Social Security tax is withheld from your paycheck for the rest of that year. If you earn $200,000 annually, you pay Social Security tax on $168,600 of it, not the full amount.
This structure means the Social Security tax is regressive — it takes a smaller percentage of total income from higher earners. A person earning $168,600 pays the full 6.2 percent on all their wages. A person earning $336,000 pays 6.2 percent only on the first $168,600, which works out to 3.1 percent of their total income.
Workers who change jobs during the year may temporarily pay more. If you earn $100,000 at one job and then move to another job mid-year, each employer withholds Social Security tax based on what they see on your W-4 form. You might pay tax on more than $168,600 total. You can claim a refund of the overpayment when you file your tax return, or you can adjust your W-4 at your new job to prevent it.
Year-to-year changes in the wage base
The Social Security Administration uses a formula based on the National Average Wage Index to set the wage base each year. This index tracks the average wage earned by all workers in the United States. When average wages rise, the wage base rises proportionally.
The 2024 wage base of $168,600 represents a $8,400 increase from 2023. In 2022, the wage base was $147,000. The year-to-year change varies depending on wage growth that year. During years of slower wage growth, the increase is smaller; during years of faster growth, it is larger. The Social Security Administration publishes the next year's wage base in October, giving employers and payroll systems time to update.
Self-employed workers and those managing payroll should check the Social Security Administration website each October to confirm the new wage base for the following year, since tax software and payroll systems need to be updated by January 1.
How wage base increases affect your Social Security benefit
Your future Social Security benefit is calculated based on your highest 35 years of earnings, adjusted for inflation. The wage base does not directly limit what counts toward your benefit — instead, your actual earnings in each year count, regardless of whether they exceeded the wage base.
However, because you do not pay Social Security tax on earnings above the wage base, those earnings above the cap do not factor into your benefit calculation. If you earned $200,000 in 2024, only the $168,600 subject to tax counts toward your benefit. The additional $31,400 is not included.
This means higher earners do not receive proportionally higher benefits for earnings above the wage base. The benefit formula is designed so that lower-income workers replace a higher percentage of their pre-retirement income, while higher-income workers replace a lower percentage.
Changes proposed or under discussion
Congress has proposed various changes to Social Security's financing, including raising or eliminating the wage base entirely. Some proposals would explore Social Security tax to all earnings with no cap. Others would raise the cap higher than it currently goes. As of now, these remain proposals and have not become law.
If you are tracking potential changes to Social Security, the official source is the Social Security Administration website and congressional legislative tracking sites. News coverage of proposed changes can be unclear about what is actually in effect versus what has been suggested.
What to do if you are self-employed or have multiple jobs
If you are self-employed, you report your net earnings on Schedule C of your tax return and pay self-employment tax on those earnings up to the wage base. You can deduct half of your self-employment tax as an adjustment to income on your return.
If you have two or more jobs, each employer withholds Social Security tax independently. You may overpay if your combined earnings exceed the wage base. To avoid overpaying, you can request that one employer withhold extra federal income tax instead of Social Security tax, or you can claim the overpayment when you file your return. Form 1040 allows you to claim a credit for excess Social Security tax paid.
Frequently Asked Questions
Will the Social Security tax rate go up in 2025?
The tax rate itself — 6.2 percent for employees — is set by law and has not changed since 1990. The wage base will increase in 2025 based on 2024 wage growth, but the rate will remain the same. The Social Security Administration announces the 2025 wage base in October 2024.
Does paying more Social Security tax mean I get a bigger benefit?
Only if the additional tax is on earnings you did not previously have counted in your record. If you are paying tax on earnings above the old wage base because the cap increased, those earnings do count toward your benefit calculation. But earnings above the wage base do not generate proportionally higher benefits — the benefit formula is progressive.
What happens if I paid Social Security tax on earnings above the wage base?
If you had multiple jobs and your combined earnings exceeded the wage base, you overpaid. You can claim a credit for the excess on your tax return. The IRS will refund it or explore it to other taxes owed. You do not need to contact Social Security — the tax return handles it.
Is there a wage base cap for Medicare tax?
No. Medicare tax is 1.45 percent on all wages with no cap. Additionally, there is a 0.9 percent Medicare surtax on wages above $200,000 for single filers and $250,000 for married filing jointly. This surtax has no wage base limit.