What Is FICA Tax? Social Security and Medicare Explained

FICA Tax Rates in 2026: Complete Breakdown

FICA consists of two separate taxes, each with distinct rules, rates, and purposes:

Social Security Tax: 6.2% and the $176,100 Wage Cap

Social Security tax is formally called the Old-Age, Survivors, and Disability Insurance (OASDI) tax. It funds retirement income and disability benefits for American workers and their families.

How It Works

You pay 6.2% on every dollar of wages up to the annual wage base limit. In 2026, that limit is $176,100. Once your cumulative wages for the year cross $176,100, Social Security withholding stops for the rest of the calendar year. Your employer simultaneously stops paying their matching 6.2%.

The Wage Cap in Action

For a worker earning $220,000 in 2026:

- Social Security applies to the first $176,100: $176,100 × 6.2% = $10,918

- The remaining $43,900 ($220,000 − $176,100) is exempt from Social Security

- Total Social Security withheld: $10,918 for the year

This means high-income workers see their take-home pay jump once they cross the wage base in late summer or fall — not because of anything they did, but because the Social Security clock resets.

How the Wage Cap Is Set

The IRS adjusts the Social Security wage base annually based on national average wage index increases. Over the past decade, the wage base has increased by approximately $4,000–$8,000 per year. In 2025 the limit was $168,600; in 2026 it rose to $176,100. Tracking this is important for payroll departments and high earners.

What You Earn From Social Security Contributions

Social Security contributions are not lost — they earn you work credits. In 2026, you earn one credit for each $1,730 of covered earnings, up to four credits per year. Forty lifetime credits (10 years of work) qualifies you for retirement benefits. Your expected benefit amount is calculated based on your 35 highest-earning years, indexed for inflation.

Medicare Tax: 1.45% With No Wage Cap

Medicare tax funds the federal health insurance program for Americans aged 65 and older and certain disabled individuals. Unlike Social Security, Medicare has no wage cap — 1.45% applies to every dollar of wages no matter how high your income goes.

Additional Medicare Tax for High Earners

The Affordable Care Act added the Additional Medicare Tax starting in 2013. This extra 0.9% applies to wages above:

- $200,000 for single filers

- $250,000 for married filing jointly

- $125,000 for married filing separately

Importantly, employers must withhold the 0.9% additional Medicare tax once wages to a single employee exceed $200,000 in a calendar year — regardless of that employee's actual filing status. If a married couple each earn $175,000, neither employer withholds the additional Medicare tax (each is below $200,000). But the couple's combined income of $350,000 exceeds the $250,000 MFJ threshold by $100,000, so they'll owe an additional $900 in Medicare tax at filing time.

Net Investment Income Tax (NIIT)

High earners also face a 3.8% Net Investment Income Tax on interest, dividends, capital gains, rents, and royalties if their modified adjusted gross income (MAGI) exceeds the same thresholds ($200,000 single / $250,000 MFJ). This is not a payroll tax — it appears on Form 8960 when you file your tax return — but it is part of the total healthcare funding system alongside Medicare taxes.

FICA for Self-Employed Workers: The Self-Employment Tax

Employees see 7.65% FICA withheld from their paycheck and never directly experience the employer's matching 7.65%. Self-employed workers have no employer to split the bill — they pay both sides themselves as Self-Employment Tax (SE Tax) at the full 15.3% rate (12.4% Social Security + 2.9% Medicare).

The Deduction for Self-Employed Workers

Congress partially compensates self-employed workers with a deduction equal to the employer-equivalent half of SE tax (7.65%). This deduction is taken on Schedule 1 of Form 1040 and reduces adjusted gross income (not just taxable income). For a self-employed worker with $100,000 in net self-employment income:

- Net SE income: $100,000

- SE tax (15.3%): $15,300

- SE tax deduction (7.65%): $7,650

- Reduction in income tax at 22% bracket: $7,650 × 22% = $1,683

Quarterly Estimated Payments

Self-employed workers don't have payroll withholding. They must make quarterly estimated tax payments to cover both SE tax and income tax. The deadlines are April 15, June 15, September 15, and January 15 (of the following year). Underpayment of estimated taxes results in penalties — typically 8% (IRS underpayment rate in 2026) on the amount unpaid.

SE Tax on Net Business Income

Self-employment tax applies to net profit from self-employment — revenue minus business expenses — not gross revenue. This is why tracking business expenses is so important for freelancers and small business owners. Every legitimate business deduction reduces SE tax as well as income tax.

Who Is Exempt From FICA Taxes?

While FICA applies to virtually all earned income, there are specific exempt categories:

Student FICA Exemption

Students employed by the college or university where they are enrolled are exempt from FICA on wages earned from that school, provided they are enrolled at least half-time. This applies to on-campus jobs (tutoring, research assistantships, library work) but not to off-campus work.

Nonresident Alien Workers

Certain nonresident aliens on specific visa types (F-1, J-1, M-1, Q-1, Q-2) are exempt from FICA during their authorized period of residence on that visa. This exemption is limited and does not extend to permanent residents or workers on H-1B, O-1, or L-1 visas.

Religious Order Members

Members of qualified religious orders who take a vow of poverty may be exempt from FICA. The religious organization itself undergoes a separate election process to exempt its members.

Certain Government Employees

Some state and local government employees hired before 1984 participate in alternative state retirement systems and may not pay Social Security taxes. These workers are covered by their state pension instead. However, they still pay Medicare taxes (a rule change implemented in 1986).

Employee vs. Independent Contractor Classification

It is worth emphasizing: if you are classified as an independent contractor (1099 worker) rather than an employee (W-2 worker), your "client" does not withhold FICA. You handle all taxes through self-employment tax. Misclassification of employees as contractors is an IRS enforcement priority — workers who believe they are misclassified can file Form SS-8 to request an IRS determination.

Real Dollar Impact: FICA at Different Income Levels

FICA taxes are regressive in one important sense: because Social Security has a wage cap, the effective rate decreases as income rises above $176,100. A worker earning $80,000 pays 7.65% in total FICA. A worker earning $300,000 pays a total FICA amount of ($176,100 × 6.2%) + ($300,000 × 1.45%) + ($100,000 × 0.9%) = $10,918 + $4,350 + $900 = $16,168, which is an effective rate of about 5.4% of total wages.

FICA vs Income Tax: How They Differ

Many people confuse FICA taxes and income taxes — they appear as separate line items on every paycheck, but they function very differently:

Income Tax is Progressive; FICA is Flat

Federal income tax uses seven brackets — higher income is taxed at higher rates. FICA is a flat percentage on all wages (within the Social Security cap). A $25,000 worker and a $100,000 worker both pay exactly 7.65% in FICA. Their federal income tax rates differ dramatically.

Income Tax Is Reduced by Deductions; FICA Is Not

Your $15,000 standard deduction, your 401(k) traditional contribution, your HSA contribution — none of these reduce FICA. You pay FICA on your gross wages before any of these deductions. This is why pre-tax 401(k) contributions still reduce income tax (which they do) but don't reduce Social Security and Medicare withholding.

Income Tax Funds General Government; FICA Funds Specific Programs

Federal income tax revenue goes into the general fund for all government spending. FICA taxes are earmarked: Social Security goes to the Old-Age and Survivors Insurance (OASI) Trust Fund and Disability Insurance (DI) Trust Fund; Medicare goes to the Hospital Insurance (HI) Trust Fund.

You Earn Benefits From FICA; Income Tax Has No Direct Return

Your FICA contributions establish your entitlement to Social Security retirement benefits and Medicare coverage. Income tax payments confer no such direct benefit entitlement — they fund collective government services.

Frequently Asked Questions