Key facts at a glance
Standard deduction
$16,100
Single filer, 2026
Social Security wage base
$184,500
6.2%, then withholding stops
Additional Medicare threshold
$200,000
Extra 0.9%, employee-only
Here's the number before the mechanics: on a $120,000 W-2 salary, $17,570 goes to federal income tax and $9,180 goes to FICA (Social Security + Medicare), a combined $26,750, before a single dollar of state tax. That leaves $93,250 a year ($7,771/month), an effective federal rate of 22.3%.
Most of the confusion around a US paycheck comes from treating federal income tax and FICA as one blended number when they're actually two separate systems with different rules, different bases, and, for one piece of FICA, a hard cap that most people don't know exists until it hits their own paycheck late in the year.
See your own federal + FICA breakdown, bracket by bracket.
Open the US calculatorTwo systems, two bases, one paycheck
Federal income tax starts by subtracting the standard deduction, $16,100 for a single filer in 2026, from your gross salary to get your taxable income. That taxable income then runs through seven progressive brackets: 10% up to $12,400, 12% up to $50,400, 22% up to $105,700, 24% up to $201,775, 32% up to $256,225, 35% up to $640,600, and 37% above that. Only the income inside each band is taxed at that band's rate, which is why your effective rate always lands well below your top bracket.
FICA ignores all of that. It's calculated on your gross wages directly, with no standard deduction subtracted first, split into two pieces: Social Security at 6.2%, capped at a wage base ($184,500 for 2026, meaning a maximum contribution of $11,439), and Medicare at 1.45% on every dollar of wages with no cap whatsoever. Once your wages exceed $200,000, an Additional Medicare Tax of 0.9% applies on top, employee-side only, your employer doesn't match that last piece the way it matches the standard 1.45%.
Because FICA is calculated on gross wages and federal income tax is calculated on wages minus the standard deduction, the two don't move together proportionally, which is part of why a simple "just add my bracket percentage" mental model gets the total wrong almost every time.
Federal tax + FICA at three salary levels
Federal income tax and FICA (Social Security + Medicare) shown separately, since they're calculated on different bases. No state tax included.
| Gross salary | Federal tax | FICA | Net take-home | Effective rate |
|---|---|---|---|---|
| $60,000 | $5,020 | $4,590 | $50,390/yr ($4,199/mo) | 16.0% |
| $120,000 | $17,570 | $9,180 | $93,250/yr ($7,771/mo) | 22.3% |
| $200,000 | $36,734 | $14,339 | $148,927/yr ($12,411/mo) | 25.5% |
Figures use 2026 IRS federal brackets and 2026 FICA rates, single filer. Run your own exact salary through the US Salary Calculator.
Why your paycheck jumps late in the year (if you earn enough)
Social Security tax stops the moment your year-to-date wages cross the $184,500 wage base for 2026. If your salary is, say, $220,000, you'll pay the full 6.2% Social Security rate on every paycheck until you cross that line, typically sometime in Q4, and then Social Security withholding disappears entirely for your remaining paychecks that year. Medicare's 1.45% never stops, since it has no cap, but losing the 6.2% Social Security piece is enough to visibly bump your take-home.
The catch: if you switch employers mid-year, the new employer has no visibility into what you already paid at your old job, so they'll start withholding Social Security from zero again. You'll get the overpayment back as a credit when you file your tax return, but it won't show up in your paycheck until then, a genuine cash-flow trap for job-hoppers earning above the wage base.
The Additional Medicare Tax: fixed, employee-only, never indexed
Unlike almost every other dollar threshold in the tax code, the $200,000 Additional Medicare Tax trigger for a single filer has never been adjusted for inflation since it was introduced in 2013. That means it quietly captures more people every year as wages rise, a form of bracket creep that's easy to miss because the standard deduction and the seven federal brackets do get inflation adjustments each year, but this threshold doesn't.
It's also worth knowing this tax has no employer match. Your employer pays the standard 1.45% Medicare rate on your behalf whether you earn $50,000 or $500,000, but the extra 0.9% above $200,000 comes entirely out of your paycheck with nothing mirrored on the employer side.
Run your own numbers, bracket by bracket
Enter your salary to see exactly how much goes to federal tax versus FICA, and where your take-home actually lands.
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Frequently asked questions
What's the actual difference between federal income tax and FICA?
They're two completely separate systems that happen to both come out of the same paycheck. Federal income tax funds general government spending and is calculated on your taxable income, gross salary minus the standard deduction ($16,100 for a single filer in 2026), run through seven progressive brackets from 10% to 37%. FICA (Federal Insurance Contributions Act) funds Social Security and Medicare specifically, and it's calculated straight off your gross wages with no deduction subtracted first: 6.2% Social Security up to a wage base, and 1.45% Medicare with no cap at all. Your pay stub lists them separately because they genuinely are separate, with different rates, different bases, and different purposes.
Why is my effective tax rate so much lower than my tax bracket?
Because your bracket is a marginal rate, the rate on your next dollar, not the rate on your whole salary. On $120,000, you land in the 22% federal bracket, but you don't pay 22% on all $120,000. You pay 10% on the first $12,400 of taxable income, 12% on the next chunk, and only the portion above $50,400 hits 22%. Combined with the $16,100 standard deduction reducing what's taxable in the first place, the effective federal rate on a $120,000 salary works out to about 14.6% (federal income tax alone), and about 22.3% once FICA is added on top.
Why does Social Security stop being deducted from some paychecks late in the year?
Because Social Security tax only applies up to the annual wage base, $184,500 for 2026. Once your year-to-date wages cross that line, your employer stops withholding the 6.2% Social Security tax for the rest of the calendar year, since you've already paid the maximum, $11,439. If you've ever noticed your paycheck jump up in November or December without a raise, this is almost always why. Medicare has no equivalent cap, so that 1.45% never stops.
What triggers the Additional Medicare Tax, and why doesn't my employer match it?
The Additional Medicare Tax is an extra 0.9% on wages above $200,000 for a single filer, a threshold fixed by statute since 2013 and never adjusted for inflation. It's employee-side only: your employer doesn't pay a matching 0.9% the way it does with the standard 1.45% Medicare rate, which is why it feels like a sudden jump rather than a gradual one. If you're at exactly $200,000, you owe none of it; the moment you cross that line, every dollar above it is taxed at the extra rate.
Does the standard deduction change how much FICA I owe?
No, and this trips people up constantly. The $16,100 standard deduction only reduces the income subject to federal income tax; it does not touch FICA at all. FICA is calculated on gross wages before any deduction, which is exactly why a $60,000 salary still owes $4,590 in FICA even though federal income tax on the same salary, after the deduction, is only $5,020. Treating the standard deduction as if it reduces your whole tax bill, rather than just the federal-income-tax portion, is one of the most common paycheck-math mistakes.
Why doesn't this article mention state income tax?
Because there's no single honest number to give. Federal tax and FICA are identical no matter which state you live in, they're the baseline every W-2 employee pays. State income tax on top of that ranges from $0 (Texas, Florida, Washington, Nevada, Tennessee, South Dakota, Wyoming, and Alaska) to well over 13% at the top end (California), so any nationwide 'total tax' figure would misrepresent most readers. See our dedicated comparison of no-state-tax states versus California and New York for that half of the picture.
Is any of this different if I'm self-employed instead of a W-2 employee?
Yes, meaningfully. Everything in this article assumes W-2 employment, where FICA is split 50/50 between you and your employer, you only see your half withheld. If you're a 1099 contractor or otherwise self-employed, you pay self-employment tax instead, both the employee and the notional employer half of Social Security and Medicare, on your net business profit. That's a real gap in take-home pay for the same nominal income; see our 1099 vs W-2 breakdown for the exact numbers.