What Is FICA Tax?
FICA stands for the Federal Insurance Contributions Act — a U.S. federal law that requires workers and their employers to contribute to two cornerstone social insurance programs: Social Security and Medicare.
Every time you receive a paycheck, your employer automatically withholds a portion of your gross wages and sends it to the IRS on your behalf. Your employer then matches that exact amount out of their own pocket. Together, these contributions fund:
- Social Security (OASDI) — retirement income, disability insurance, and survivor benefits for qualifying workers and their families.
- Medicare (HI) — hospital and medical insurance for Americans aged 65 and older, and certain younger individuals with disabilities.
FICA taxes are not optional — they are a legal obligation for virtually every W-2 employee and self-employed person in the United States. Understanding how they work is the first step to making sense of your pay stub.
Related: Use our full Paycheck Calculator to see FICA, federal, and state taxes combined.
FICA Tax Rates for 2025 and 2026
The IRS sets FICA tax rates and the Social Security wage base annually. Here is a complete reference table for 2025 and 2026:
| Tax Component | Employee Rate | Employer Rate | 2025 Wage Base | 2026 Wage Base |
|---|---|---|---|---|
| Social Security (OASDI) | 6.2% | 6.2% | $176,100 | $184,500 |
| Medicare (HI) | 1.45% | 1.45% | No cap | No cap |
| Additional Medicare Tax | 0.9%* | None | $200,000+ | $200,000+ |
| Total FICA (standard) | 7.65% | 7.65% | — | — |
| Self-Employed (SE Tax) | 15.3% | N/A | $176,100 | $184,500 |
* Additional Medicare Tax applies only to the employee. No employer match. Threshold: $200,000 (single/HOH), $250,000 (married filing jointly), $125,000 (married filing separately).
The Social Security wage base has increased by $8,400 from 2025 to 2026 — one of the largest single-year jumps in recent history. This means high earners will pay a maximum Social Security tax of $11,439 per year in 2026 (employee share only).
How to Calculate FICA Tax — Step by Step
Calculating your FICA tax is straightforward once you know your gross wages and the current year's wage base. Follow these four steps:
- Determine your gross wages for the pay period (hourly workers: hours × rate; salaried workers: annual salary ÷ pay periods).
- Apply Social Security tax (6.2%) to your gross wages — but only up to the Social Security wage base for that calendar year ($184,500 in 2026). Once your cumulative wages cross this threshold, Social Security withholding stops.
- Apply Medicare tax (1.45%) to all gross wages. There is no wage cap for Medicare.
- Add an extra 0.9% Medicare surtax if your wages exceed $200,000 in a single year (single filers). Your employer withholds this automatically once your cumulative pay crosses $200,000 with them.
Your employer performs these same calculations independently and matches your Social Security and Medicare contributions. That means the government receives 15.3% of your wages in total — 7.65% from you and 7.65% from your employer.
FICA Tax Calculation Formula
Here are the exact formulas used by payroll systems — and by this calculator:
// For Employees (per pay period):
SS_taxable = MIN(gross_wages, remaining_wage_base)
Social_Security_Tax = SS_taxable × 0.062
Medicare_Tax = gross_wages × 0.0145
Total_FICA = Social_Security_Tax + Medicare_Tax
// For Self-Employed Workers (annual):
Net_SE_Income = gross_SE_income × 0.9235
SE_SS_Tax = MIN(Net_SE_Income, wage_base) × 0.124
SE_Medicare_Tax = Net_SE_Income × 0.029
Total_SE_Tax = SE_SS_Tax + SE_Medicare_Tax
The 0.9235 multiplier for self-employed workers exists because they are allowed to deduct the "employer half" of SE tax before calculating the tax base — mirroring the benefit that employees receive indirectly (their employer pays half of FICA without it appearing on the employee's W-2 as income).
What Wages Are Subject to FICA?
FICA applies to earned income — compensation received for work performed. This includes:
- Regular wages and salaries
- Overtime pay and shift differentials
- Bonuses and commissions
- Tips (cash tips over $20/month must be reported)
- Severance pay
- Sick pay (from employer or third-party within 6 months)
FICA does not apply to:
- Investment income (dividends, capital gains, interest)
- Rental income
- Workers' compensation payments
- Most employer-sponsored health insurance premiums
- Wages paid to student employees who work at the school they attend (subject to conditions)
Real-Life FICA Calculation Examples
Example 1: Salaried Employee — $75,000/year (2026)
| Component | Calculation | Amount |
|---|---|---|
| Annual gross salary | — | $75,000.00 |
| Social Security Tax (employee) | $75,000 × 6.2% | $4,650.00 |
| Medicare Tax (employee) | $75,000 × 1.45% | $1,087.50 |
| Total Employee FICA | — | $5,737.50 |
| Employer FICA Match | Mirror of above | $5,737.50 |
| Total FICA to IRS | Employee + Employer | $11,475.00 |
Example 2: High Earner — $210,000/year (2026)
For a worker earning $210,000, Social Security tax caps at the $184,500 wage base, but an additional 0.9% Medicare surtax kicks in on the amount above $200,000:
| Component | Amount |
|---|---|
| Social Security Tax ($184,500 × 6.2%) | $11,439.00 |
| Medicare Tax ($210,000 × 1.45%) | $3,045.00 |
| Additional Medicare Tax ($10,000 × 0.9%) | $90.00 |
| Total Employee FICA | $14,574.00 |
Example 3: Freelancer / Self-Employed — $80,000 Net Income (2026)
A self-employed consultant earning $80,000 net pays both shares of FICA via self-employment (SE) tax:
| Step | Amount |
|---|---|
| Net SE income × 92.35% | $73,880 |
| Social Security Tax ($73,880 × 12.4%) | $9,161.12 |
| Medicare Tax ($73,880 × 2.9%) | $2,142.52 |
| Total SE Tax | $11,303.64 |
| Deductible employer half (÷ 2) | $5,651.82 |
The freelancer can deduct $5,651.82 (the employer-equivalent half) on Schedule 1 of Form 1040, reducing their adjusted gross income and overall tax liability.
See also: Self-Employment Tax Calculator for a dedicated SE tax tool.
How to Calculate the Employer's Share of FICA Tax
Employers are required by law to match every dollar of FICA tax their employees pay. This means for every $100 in wages:
- Employee pays $7.65 in FICA.
- Employer pays an additional $7.65 out of their own funds.
- Total cost to the employer per $100 wages = $107.65.
Employers report and deposit FICA taxes using Form 941 (Employer's Quarterly Federal Tax Return) or Form 944 for smaller employers. Deposits are typically made semi-weekly or monthly depending on the employer's total tax liability in the lookback period.
Unlike the employee's Additional Medicare Tax (0.9% over $200,000), employers do not match this surtax. Only the employee pays it.
Employer FICA taxes are fully deductible as a business expense, reducing the employer's taxable income on Schedule C, Form 1120, or Form 1065, depending on business structure.
Plan total payroll costs with our Paycheck Calculator — it shows both the employee net pay and the employer's total cost.
FICA Tax for Self-Employed Workers (SE Tax)
Freelancers, sole proprietors, independent contractors, and single-member LLC owners do not have an employer to match their FICA contributions. Instead, they pay self-employment (SE) tax at a combined rate of 15.3% — covering both the employee and employer halves.
Key Rules for Self-Employed FICA (2026)
- SE tax applies to net self-employment income of $400 or more per year.
- The taxable SE income base is calculated as net earnings × 92.35% (to account for the employer deduction).
- Social Security SE tax (12.4%) applies up to the $184,500 wage base in 2026.
- Medicare SE tax (2.9%) applies to all net earnings with no cap.
- The employer-equivalent half (7.65%) of SE tax is deductible on Form 1040, Schedule 1.
- Self-employed individuals should make quarterly estimated tax payments to avoid underpayment penalties (due April 15, June 16, September 15, and January 15).
Does SE Tax Count Toward Social Security Benefits?
Yes. Every dollar of SE tax you pay builds Social Security credits, just like FICA withholding for W-2 employees. Self-employed workers earn one credit for every $1,810 of net earnings in 2026 (subject to annual adjustments), up to a maximum of four credits per year. You need 40 lifetime credits to qualify for retirement benefits.
Is FICA Calculated Before or After Pre-Tax Deductions?
This is one of the most common questions on pay stub audits. The answer depends on the type of deduction:
| Deduction Type | Reduces Federal Income Tax? | Reduces FICA? |
|---|---|---|
| Section 125 health insurance premiums | ✅ Yes | ✅ Yes |
| HSA contributions (employer plan) | ✅ Yes | ✅ Yes |
| Dependent care FSA contributions | ✅ Yes | ✅ Yes |
| Traditional 401(k) contributions | ✅ Yes | ❌ No |
| 403(b) / 457(b) contributions | ✅ Yes | ❌ No |
| Roth 401(k) contributions | ❌ No | ❌ No |
| Health savings account (individual) | ✅ Yes | ❌ No |
| Union dues | ❌ No | ❌ No |
The takeaway: only Section 125 cafeteria plan deductions reduce your FICA-taxable wages. Traditional 401(k) and similar retirement contributions reduce your federal income tax but are still subject to FICA. This is why FICA withholding sometimes looks higher than expected even when you contribute heavily to retirement.
Adjust your withholding elections with our W-4 Withholding Calculator.
High Earners: Additional Medicare Tax and Wage Base Cap
When Does Social Security Tax Stop?
Once your cumulative wages from all employers in a calendar year surpass the Social Security wage base ($184,500 in 2026), your employer must stop withholding the 6.2% Social Security tax for the remainder of that year. The 1.45% Medicare tax continues regardless.
If you work for multiple employers in the same year and each one withholds up to the full wage base, you may overpay Social Security tax. You can reclaim this overpayment as a credit on Line 11 of Schedule 3 (Form 1040).
Additional Medicare Tax (0.9%) for High Earners
The Affordable Care Act introduced an additional 0.9% Medicare surtax for high-income earners. The thresholds for 2026 are:
- $200,000 — Single filers and heads of household
- $250,000 — Married filing jointly
- $125,000 — Married filing separately
Your employer starts withholding the extra 0.9% once your wages with them exceed $200,000 in a year. If the combined income of you and your spouse pushes you over the $250,000 joint threshold, but neither of you individually earned $200,000, you will need to pay the additional Medicare tax when you file your return — it will not have been withheld automatically.
FICA Tax vs. Federal Income Tax: Key Differences
Many taxpayers confuse FICA with federal income tax because both appear on every pay stub. They are fundamentally different in how they work:
| Feature | FICA Tax | Federal Income Tax |
|---|---|---|
| Rate structure | Flat percentage | Progressive brackets |
| Purpose | Social Security & Medicare | General federal budget |
| Employer match? | Yes (7.65%) | No |
| Affected by W-4? | No | Yes |
| Wage cap? | Yes (SS only) | No |
| Refundable? | Rarely | Yes (via tax return) |
| Applies to 401(k)? | Yes (most plans) | No |
The critical distinction: FICA taxes are not adjusted by your W-4, filing status, or personal exemptions. Federal income tax is reduced when you increase your W-4 allowances or claim deductions on your tax return. FICA is calculated mechanically on gross wages — it does not change based on your personal tax situation.
Calculate both together with our Federal Income Tax Estimator.
Tips to Legally Reduce Your FICA Tax Burden
While FICA taxes are largely unavoidable, there are legal strategies that can reduce your FICA-taxable wages — particularly through employer benefit plans:
- Maximize Section 125 cafeteria plan benefits. Employer-sponsored health insurance, dental, vision, and dependent care FSA contributions reduce your FICA wage base. A family that deducts $12,000 in Section 125 benefits saves approximately $918 in FICA taxes per year.
- Use a Health Savings Account (HSA) via your employer. Employer contributions to your HSA are excluded from FICA wages. Employee contributions made through payroll deduction via a Section 125 plan are also FICA-exempt — unlike direct HSA contributions made outside payroll.
- Elect employer-paid transportation benefits. Qualified commuter benefits (parking and transit) up to IRS limits are excluded from both income tax and FICA when offered through a Section 125 plan.
- Consider S-Corp election if self-employed. S-Corp owners can split their income between salary and distributions. Only the salary portion is subject to SE tax — distributions are not. This must be done carefully with a "reasonable compensation" requirement enforced by the IRS.
- Deduct the employer half of SE tax. Self-employed workers can deduct 50% of SE tax from gross income on Schedule 1 of Form 1040, reducing their AGI and potentially their income tax bracket.
Always consult a licensed CPA or tax professional before making major changes to your compensation or business structure for tax purposes.
Frequently Asked Questions About FICA Tax
What is FICA tax and how is it calculated?+
FICA tax is the mandatory payroll tax that funds Social Security and Medicare. For employees in 2026, it equals 6.2% of gross wages up to $184,500 (Social Security) plus 1.45% of all wages (Medicare), totaling 7.65%. Employers match this amount. Self-employed workers pay the full 15.3% as SE tax.
Is FICA the same as Social Security tax?+
No. FICA includes both Social Security (OASDI) and Medicare (HI). Social Security tax is one component of FICA at 6.2%. The term 'FICA' on your pay stub refers to the combined Social Security and Medicare withholding.
How do I calculate FICA tax on my paycheck?+
Multiply your gross pay by 6.2% for Social Security (only on the first $184,500 of annual wages in 2026) and by 1.45% for Medicare. Add the two amounts together to get your FICA withholding for that pay period. Our calculator above does this automatically.
What is the FICA tax rate for 2025?+
The employee FICA rate for 2025 is 7.65% — 6.2% Social Security on wages up to $176,100 and 1.45% Medicare on all wages. The employer matches 7.65%. Self-employed workers pay 15.3% SE tax.
Does FICA apply to tips?+
Yes. Cash tips of $20 or more per month are subject to FICA. Employees must report tips to their employer using Form 4070. The employer withholds Social Security and Medicare tax on reported tips, and the employer matches these amounts.
Can I get a refund of FICA taxes?+
In most cases, no. However, if you had multiple employers and Social Security tax was over-withheld (your total wages from all employers exceeded $184,500 in 2026 but each employer withheld up to the cap), you can claim the excess as a tax credit on Form 1040, Schedule 3. Non-resident aliens on F, J, M, or Q visas may also file Form 843 for a FICA refund.
How is the employer's share of FICA tax calculated?+
Employers pay an amount equal to the employee's FICA withholding: 6.2% of taxable wages up to the Social Security wage base, plus 1.45% of all wages. Employers do not match the 0.9% Additional Medicare Tax for high earners.
Is FICA tax calculated on gross income before or after 401(k)?+
FICA is calculated on gross wages before traditional 401(k), 403(b), or 457(b) deductions. These retirement contributions reduce federal income tax but do NOT reduce FICA-taxable wages. Only Section 125 cafeteria plan deductions reduce the FICA wage base.
Sources & Further Reading
- IRS Topic No. 751 — Social Security and Medicare Withholding Rates
- Social Security Administration — 2026 COLA Fact Sheet
- IRS Publication 15 (Circular E) — Employer's Tax Guide
Disclaimer: The information and calculations on this page are for general educational and estimation purposes only. They do not constitute tax, legal, or financial advice. Tax laws change frequently; always verify current rates with the IRS or a qualified tax professional before making financial decisions. USA Salary Tools is not affiliated with the IRS or Social Security Administration.