Most workers lose somewhere between 15 and 30 percent of their gross pay to taxes before the money ever hits their bank account. Three things drive the total: federal income tax, FICA payroll taxes (Social Security and Medicare, a flat 7.65 percent), and your state income tax, which can be zero, a flat rate, or a steep progressive scale depending on where you live.
Here is exactly what comes out, how each piece is calculated, and how much your state choice changes your take-home pay. To see your own numbers, use a free state paycheck calculator for Illinois, Texas, or California.
What gets taken out of your paycheck
Deductions come off in a specific order. Pre-tax items are removed first, then taxes are calculated on what remains.
- Pre-tax deductions: traditional 401(k), HSA, and pre-tax health premiums. These lower the income your taxes are based on.
- Federal income tax: a progressive rate set by your income and filing status.
- Social Security: 6.2 percent of wages, up to an annual wage base.
- Medicare: 1.45 percent of all wages, plus an extra 0.9 percent on wages above $200,000.
- State income tax: none, a flat rate, or progressive brackets, depending on your state. Some states add a payroll tax such as California SDI.
FICA: Social Security and Medicare
FICA is the most predictable part of your withholding because the rates are flat. Together they take 7.65 percent of your wages up to the Social Security wage base, then 1.45 percent on anything above it (with the extra Medicare surtax kicking in for high earners). Note that a traditional 401(k) reduces your income tax but does not reduce FICA, so Social Security and Medicare still apply to those contributions.
Federal income tax
Federal income tax is progressive, which means only the dollars inside each bracket are taxed at that bracket's rate. Before any tax is applied, you subtract the standard deduction (for 2025, that is $15,000 for a single filer and $30,000 for married filing jointly). On a $65,000 salary, a single filer's federal income tax works out to roughly $5,200 after the standard deduction, which is far less than the top bracket rate suggests.
Where your paycheck goes
Here is how a $65,000 salary splits for a single filer in Illinois. Take-home is by far the largest slice, with federal tax, FICA, and the flat state tax making up the rest.
State income tax: it depends where you live
State tax is where take-home pay really diverges. Texas has no state income tax at all. Illinois charges a flat 4.95 percent. California uses progressive brackets from 1 percent to 12.3 percent and adds a State Disability Insurance (SDI) payroll tax. The table below shows the same $65,000 single-filer salary across all three.
| State | Federal | FICA | State tax | SDI | Take-home | % kept |
|---|---|---|---|---|---|---|
| Texas | $5,246 | $4,973 | $0 | $0 | $54,782 | 84.3% |
| Illinois | $5,246 | $4,973 | $3,080 | $0 | $51,702 | 79.5% |
| California | $5,246 | $4,973 | $2,298 | $715 | $51,769 | 79.6% |
A Texan keeps about $3,000 more than an Illinoisan on the same salary. Interestingly, at $65,000 California lands close to Illinois, because its lowest brackets are gentle. That changes fast at higher incomes, where California's top rates make it one of the most heavily taxed states in the country.
$65,000 salary, single filer
$54,782 in Texas
vs $51,702 in Illinois. See your own state.
Pre-tax deductions can boost your take-home
Contributions to a traditional 401(k), an HSA, or a pre-tax health plan come out before income tax is calculated, so they lower your taxable income and the tax you owe. You still do not get that money in cash today (it goes into those accounts), but it means more of your gross pay is working for you rather than going to taxes. HSA contributions are especially efficient because they also avoid FICA.
Biweekly vs monthly: does it change your taxes?
No. Your annual tax depends on your total yearly income, not how often you are paid. Getting paid every two weeks (26 checks) versus monthly (12 checks) only changes the size of each paycheck, not the yearly total. A calculator can show you the per-paycheck figure for either schedule so you can budget accurately.