Both employees and employers pay FICA tax, but they split the burden differently depending on how you work

If you work as an employee, you and your employer each pay half of the FICA tax on your wages. Your employer withholds your share from your paycheck and sends both amounts to the IRS. If you're self-employed, you pay the full FICA tax yourself — both the employee and employer portions — through self-employment tax. The rate and who writes the check changes based on your work arrangement, but the total amount funding Social Security and Medicare stays the same.

The person or entity responsible for paying FICA depends entirely on your employment status. For traditional employees, the responsibility is shared and automatic — your employer handles the withholding and remittance. For self-employed workers, you carry the full load yourself and must pay it through your tax return or quarterly estimated payments.

Key Takeaways

  • Employees pay 7.65% of gross wages for FICA, and employers pay a matching 7.65%, for a combined 15.3%.
  • Self-employed workers pay the full 15.3% themselves, calculated on Schedule SE and reported on Form 1040.
  • Your employer withholds your FICA share from each paycheck; you see it listed separately on your pay stub.
  • FICA tax has a wage base limit for Social Security only — in 2024 it applies to the first $168,600 of earnings — but Medicare tax has no limit.
  • Railroad employees and certain government workers may pay into different systems instead of FICA.

How employee and employer FICA payments work

When you work as an employee, FICA tax is split evenly between you and your employer. You contribute 7.65% of your gross wages, and your employer contributes a matching 7.65%. Your employer is responsible for withholding your share from your paycheck before you receive it, then sending both portions to the IRS on your behalf.

You can see your FICA withholding on your pay stub, usually listed as two separate line items: Social Security tax (6.2%) and Medicare tax (1.45%). Your employer's matching contribution does not appear on your pay stub because it comes from the company's funds, not yours. However, you can see the employer match listed on your W-2 form at the end of the year in Box 12.

The employer's share is a business expense for the company. Some employers factor this cost into salary decisions, but the amount withheld from your paycheck is fixed by law and does not change based on company size or industry. The employer must remit both the employee withholding and the employer contribution to the IRS, typically on a monthly or semi-weekly schedule depending on the size of the payroll.

Self-employment tax: paying both shares yourself

If you're self-employed — meaning you work for yourself or own a business where you're not a traditional W-2 employee — you pay both the employee and employer portions of FICA. This combined payment is called self-employment tax, and it totals 15.3% of your net self-employment income.

You calculate self-employment tax on Schedule SE, which you attach to your Form 1040 tax return. The IRS provides a worksheet to determine your net self-employment income, which is generally your business income minus business expenses and a deduction for half of your self-employment tax itself. You then pay this tax when you file your annual return or through quarterly estimated tax payments if you expect to owe more than $1,000.

Self-employed workers can deduct half of their self-employment tax as an adjustment to income on Form 1040, which partially offsets the burden of paying both portions. However, you still pay the full 15.3% rate, whereas an employee only pays 7.65% directly. This deduction recognizes that the employer portion is a business cost, similar to how an employer's contribution is treated as a business expense.

Wage base limits and how they affect your FICA payment

FICA tax has a wage base limit for Social Security only. In 2024, this limit is $168,600 of earnings per year. Once your wages reach that amount, you stop paying the 6.2% Social Security portion for the rest of that calendar year. However, Medicare tax has no wage base limit — you pay 1.45% on all earnings, no matter how high.

This means high-income earners pay a smaller percentage of their total income in FICA tax than lower-income workers. For example, someone earning $200,000 pays Social Security tax only on the first $168,600, but someone earning $50,000 pays it on their entire salary. The wage base limit changes each year based on national wage trends. The Social Security Administration announces the new limit in October for the following year.

If you work multiple jobs, each employer withholds FICA based on the wages they pay you, so you could temporarily overpay Social Security tax if your combined earnings exceed the limit. You can claim a credit for the overpayment when you file your tax return, and the IRS will refund the excess amount.

Additional Medicare tax for high earners

Employees earning over a certain threshold pay an extra 0.9% Medicare tax on top of the standard 1.45%. For 2024, this Additional Medicare Tax applies to wages over $200,000 for single filers, $250,000 for married couples filing jointly, and $125,000 for married couples filing separately. Your employer withholds this extra amount automatically if your wages exceed the threshold.

Self-employed workers also pay Additional Medicare Tax on self-employment income above these same thresholds. You calculate it on Form 8959 and report it on your Form 1040. Unlike the standard Medicare tax, Additional Medicare Tax has no employer match — you pay the full 0.9% yourself if you're self-employed, and your employer pays nothing toward this additional amount.

Who does not pay FICA tax

Most workers pay FICA tax, but certain groups are exempt or pay into different systems. Railroad employees pay into the Railroad Retirement Tax Act (RRTA) system instead of FICA. Federal government employees hired before 1984 typically pay into the Civil Service Retirement System (CSRS) rather than FICA. Some state and local government employees may be exempt from FICA if their employer has opted out and provides an alternative retirement plan.

Students employed by the school or university they attend may be exempt from FICA withholding on those wages. Certain religious groups that have filed for exemption with the IRS also do not pay FICA. If you fall into one of these categories, your employer should inform you and your pay stub should reflect the exemption. These exemptions are rare and typically require specific conditions or prior filings with the IRS.

How FICA payments appear on your tax documents

Your FICA withholding appears in multiple places depending on your work situation. On your pay stub, you see the current pay period's withholding for Social Security and Medicare. On your W-2 form, Box 4 shows total Social Security tax withheld for the year, Box 6 shows total Medicare tax withheld, and Box 12 shows your employer's matching contribution.

If you're self-employed, your self-employment tax appears on Schedule SE and flows to your Form 1040. The IRS uses these documents to verify that you paid the correct amount and to credit your earnings toward your Social Security record. Keeping copies of your pay stubs and tax forms helps you track your FICA contributions over time and verify they are accurate.

Frequently Asked Questions

Can I opt out of paying FICA tax?

No, FICA tax is mandatory for nearly all employees and self-employed workers. The only exceptions are specific groups like railroad employees, certain government workers, and some religious organizations that have filed for exemption. Your employer is required by law to withhold your share.

Why do I pay FICA if I'm already paying income tax?

FICA and income tax are separate taxes that fund different programs. FICA funds Social Security and Medicare, while income tax funds general government operations. Both are withheld from your paycheck, but they go to different accounts and serve different purposes.

What happens to my FICA payments if I change jobs?

Your FICA contributions follow you throughout your career. Each employer withholds FICA based on the wages they pay you, and all contributions are credited to your Social Security record under your name and Social Security number. You do not lose contributions when you change jobs.

Do I pay FICA tax on tips or bonuses?

Yes, FICA tax applies to tips and bonuses just like regular wages. Your employer withholds FICA on all compensation, including tips you report to them and bonuses. Tips you do not report to your employer are still subject to FICA, but you are responsible for paying the tax yourself.

If I overpay FICA tax, how do I get it back?

If you overpay Social Security tax because you worked multiple jobs and exceeded the wage base limit, you can claim a credit on your Form 1040 when you file your tax return. The IRS will refund the overpayment. Overpayment of Medicare tax is handled the same way through Form 8959.