How Paycheck Taxes Work in the US
Your paycheck gets taxed in layers before it reaches you: federal income tax, then FICA (Social Security and Medicare at a flat 7.65%), then state tax if your state collects one. On a $75,000 salary, those layers take roughly $13,400 in a no-income-tax state and about $17,206 in California, even before pre-tax deductions like a 401(k). Our paycheck calculator runs the full breakdown for your state and salary. This guide explains what each layer is, why your take-home is smaller than you expected, and how to legally keep more of it. All figures are 2026 estimates; verify the current numbers on our methodology page. Companion guides: what is taken from your gross pay and how to read your pay stub.
The short answer
Three layers of tax come out of each paycheck: federal income tax (graduated brackets), FICA at a flat 7.65% (Social Security plus Medicare), and state tax (zero to 13.3%, depending on where you live). Pre-tax deductions like 401(k) contributions shrink the first and third layers but not the second. What your employer withholds each payday is an estimate; the real bill settles when you file your tax return.
That last point matters. Withholding is not your tax. It's a series of installment payments toward your tax. If too much was withheld, you get a refund. If too little, you owe. A fat refund means you gave the government an interest-free loan for a year, which we'll come back to.
Your pay stub proves all of this if you read it top to bottom. It starts with gross pay, subtracts pre-tax deductions like a 401(k) and insurance premiums, then shows the three tax layers, then any post-tax items, and lands on net pay. Every take-home mystery on that stub has a line explaining it. The order matters: pre-tax deductions happen before the taxes are computed, which is why they change what you owe. Taxes don't care about your post-tax deductions at all.
Federal income tax
Federal income tax is the biggest bite for most people, and it's also the most misunderstood. The US taxes income in marginal brackets: dollars land in different buckets taxed at different rates. The mistake almost everyone makes is thinking a raise into a higher bracket means all your income gets taxed at that higher rate. It doesn't. Only the dollars above each threshold are taxed at the higher rate.
Here's a real example. You're single, earn $75,000, and take the standard deduction, which is $16,100 in our 2026 estimates. Your federally taxable income is $75,000 − $16,100 = $58,900. That $58,900 fills the brackets from the bottom up:
- 10% × $12,400 = $1,240
- 12% × $38,000 = $4,560
- 22% × $8,500 = $1,870
Total federal income tax: $7,670. Your marginal rate, the tax on your next dollar, is 22%. But your effective rate, what you actually paid across all the dollars, is $7,670 ÷ $75,000, about 10.2%. When people say "I'm in the 22% bracket," that second number is the one their wallet actually feels.
Filing status shifts all of this. The example above is a single filer. Married couples filing jointly get a bigger standard deduction and wider brackets, so the same $75,000 household income can produce a meaningfully lower federal bill. Head-of-household sits between the two. The calculator applies your status before it does anything else, because everything downstream depends on it.
Your employer estimates this bill from your W-4, the form where you report your filing status and any extra withholding you want. The standard deduction exists so you never pay federal tax on the first $16,100. Everyone filing single gets it, no itemizing required.
Two more federal notes. First, the brackets and the standard deduction get adjusted for inflation most years, which is why the figures in this article are 2026 estimates and why next year's paycheck won't be identical. The IRS publishes the new numbers each fall, and calculators like ours rebuild on them. Second, most people take the standard deduction because it's usually larger than their itemized deductions (mortgage interest, charitable gifts, and the rest) combined. If your itemized total is bigger, itemizing lowers your taxable income further.
FICA: Social Security and Medicare
FICA is simpler and more relentless than income tax. It takes a flat 7.65% of your wages, starting with the very first dollar, no brackets, no standard deduction. Two pieces make it up: 6.2% for Social Security and 1.45% for Medicare. On $75,000, that's $75,000 × 7.65% = $5,738 a year.
Three details worth knowing. First, Social Security's 6.2% stops at a wage cap that rises most years, so very high earners pay it on only part of their income. Medicare's 1.45% has no cap, and there's an extra 0.9% on wages above $200,000 for single filers. Second, your employer pays a matching 7.65% on your behalf, so the government collects 15.3% on your labor whether you see it or not. Self-employed people pay both halves themselves, which is why freelancer tax bills sting.
Third, and this surprises people: 401(k) contributions do not reduce FICA. Your 7.65% is calculated on your full gross wages before any retirement deduction. One of the few things that does skip FICA is an HSA contribution made through your employer's payroll. We'll get to that.
An easy mental model: income tax is progressive and negotiated once a year at filing time, while FICA is flat and final. Nobody files a FICA return or gets a FICA refund for regular employment. You paid it, it funded Social Security and Medicare, done. That's also why swapping jobs mid-year can mess up your federal withholding while your FICA doesn't blink: the income-tax estimate restarts with each employer's W-4, but the 7.65% just keeps going.
What does YOUR paycheck actually look like?
Enter your salary, state, and pay frequency. See the federal, FICA, and state layers line by line.
Calculate my paycheck →State taxes
State income tax is where your ZIP code starts to matter. Nine states tax wages at 0%: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. At the other end, California's top marginal rate reaches 13.3%, the highest in the country. Roughly half the states use graduated brackets like the federal government; the rest use a single flat rate.
Flat doesn't always mean low, by the way. Illinois charges a flat 4.95% on every dollar of taxable income, and Pennsylvania's flat rate is 3.07%. A graduated state can tax a middle-income earner less than a flat state does, or far more, depending on where their brackets sit. Read your own state's rules instead of assuming. Also note that most states let you take their own standard deduction, separate from the federal one, and some offer credits that cut the final bill in ways a simple rate can't show.
States also pile on extras most people don't notice until they read a pay stub. California, for example, takes a disability insurance payroll tax (SDI) on top of income tax, which comes to about $975 a year on a $75,000 salary in our estimates. A few cities add their own income tax on top of the state's. Two paychecks with the same salary can differ by hundreds of dollars a month purely because of where the job sits. We dig into the biggest head-to-head in our guide on why a California paycheck is smaller than a Texas one.
Pre-tax deductions: 401(k), HSA
Pre-tax deductions come off your pay before federal and state income tax are calculated, which shrinks both layers. A 401(k) is the classic example. Contribute $5,000 a year and your federally taxable wages effectively drop by $5,000, saving $1,100 in federal tax if you're in the 22% bracket. You've paid yourself, kept the money, and paid less tax to do it. Remember the exception from above: FICA still applies to the full amount. The IRS wants its 7.65% regardless.
An HSA, available if you have a high-deductible health plan, is the one deduction that dodges all three layers. Contributions made through payroll skip federal income tax, state income tax, and FICA. The money grows tax-free, and qualified medical withdrawals come out tax-free too. That's the triple tax advantage financial planners keep raving about, and they're right this time.
Other pre-tax items that quietly reduce your taxable wages: health insurance premiums you pay, health FSA contributions (use them or lose them within the plan year), and commuter benefits in some states and cities. None of these change your salary. All of them change what the tax layers are calculated on.
Roth contributions are the mirror image. A Roth 401(k) or Roth IRA contribution comes out of your pay after taxes, so it doesn't reduce this year's taxes at all. The payoff arrives decades later, when withdrawals in retirement are tax-free. Which side is better depends on whether your tax rate is higher now or in retirement. For paycheck purposes, just know Roth money doesn't shrink your current withholding.
Timing matters with all of these deductions. If you start a 401(k) mid-year instead of January, you've lost half a year of pre-tax sheltering you can't get back, since contribution limits run on the calendar year. Same story with HSA and FSA elections: you generally set them during open enrollment and live with the choice for the year. One week of attention each fall is worth thousands of dollars in tax treatment the following year.
Worked example: $75,000 in California vs Texas
Same person, same salary, two states. Single filer, $75,000 salary, no 401(k), standard deduction. Federal and FICA are identical in both states. State tax is where they split.
| California | Texas | |
|---|---|---|
| Gross pay | $75,000 | $75,000 |
| Federal income tax | −$7,670 | −$7,670 |
| FICA (7.65%) | −$5,738 | −$5,738 |
| State income tax | −$2,823 | $0 |
| State disability (SDI) | −$975 | $0 |
| Take-home pay | ≈ $57,794 | ≈ $61,593 |
The California salary keeps about $57,794; the Texas salary keeps about $61,593. That's a gap of roughly $3,798 a year, or about $317 a month, for doing the exact same job. On a biweekly schedule, it's about $2,223 per check versus $2,369 per check. None of this says which state you'd rather live in, costs and salaries differ too, but now you can see the tax part of the trade with the curtain pulled back.
One more way to frame it: the California earner's total tax layers add up to about 22.9% of their gross pay, while the Texas earner pays about 17.9%. That 5-point swing is entirely the state layer, same federal system, same salary, same person. When recruiters pitch a job in another state, that difference belongs in the negotiation conversation alongside rent and commute.
Again: these are 2026 estimates built from the assumptions we've published. Check the full details on our methodology page before you budget around any of these numbers.
Compare your state against any other
Run the same salary through a different state and watch what changes. The results surprise almost everyone.
Run my numbers →How to keep more of your paycheck
Start by fixing your W-4. If you get a big refund every spring, you've over-withheld all year. Adjusting the form lets you take the money monthly instead of lending it to the IRS at 0%. You're not reducing your tax, just collecting your own money sooner.
Then use the deductions above. A 401(k) at least up to your employer's match, an HSA if you're eligible, and premiums and FSA money you were going to spend anyway. Each dollar routed pre-tax skips the income-tax layers entirely, or most of them. Finally, read your pay stub once a quarter. Payroll errors happen: wrong state, wrong tax code, a deduction that never stopped. The stub is the source of truth, and five minutes a quarter catches most of them.
Don't overlook the paycheck itself as a record. Your W-2 each January summarizes a year of this arithmetic, and mistakes on it are rarer but nastier than pay-stub errors. Compare its wage figure with your last stub of the year, check that your 401(k) and HSA totals landed in the right boxes, and confirm your Social Security wages didn't exceed the cap unless your salary genuinely did. Catching one wrong box in January beats discovering it mid-April.
What you can't do is dodge FICA. Every legal strategy in the book still leaves the 7.65% mostly untouched. Accept it, optimize the layers you control, and move on.
Make the audit a habit. Once a year, take one pay stub and walk it line by line against your salary. Gross pay times your pay frequency should equal your annual salary. The federal withholding should roughly match what the published brackets produce for your pay. The state line should match your state's rate structure. If a line is off, payroll departments fix mistakes when you show them the numbers, and showing them the numbers is much easier when you've done this math once.
The bottom line
Paycheck taxes aren't one tax. They're a stack: graduated federal brackets, a flat 7.65% FICA, and a state layer that ranges from zero to the steepest in the country. On $75,000, that stack leaves you roughly $57,794 in California and $61,593 in Texas by our 2026 estimates. If you want your own number, state by state and deduction by deduction, run your figures through the California paycheck calculator or the Texas paycheck calculator. Your pay stub will make a lot more sense afterward.