For most workers, the government takes roughly 20% to 35% of each paycheck once federal income tax, Social Security, Medicare, and state and local taxes are added together. Where you land in that range depends on how much you earn, which state you live in, your filing status, and what pre-tax benefits you use through your employer. A single person earning $100,000 in a state with a 5% income tax typically loses close to 30% of gross pay to withholding before the money ever reaches their bank account.
The gap between gross pay and take-home pay is made up of several different deductions, each with its own rules. Understanding the pieces separately makes the total much easier to plan around.
Federal Income Tax
The federal government uses a progressive system with seven brackets ranging from 10% to 37% for 2026.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 For a single filer, the thresholds are:
- 10% on taxable income up to $12,400
- 12% on income from $12,401 to $50,400
- 22% on income from $50,401 to $105,700
- 24% on income from $105,701 to $201,775
- 32% on income from $201,776 to $256,225
- 35% on income from $256,226 to $640,600
- 37% on income above $640,600
Married couples filing jointly get wider brackets: the 10% band runs to $24,800, and the 37% rate starts above $768,700.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
The point most people miss is that only the income inside each bracket is taxed at that bracket’s rate. Your marginal rate (the rate on your last dollar) is almost always higher than your effective rate (the average across all your income). A single filer earning $100,000 sits in the 22% bracket, but after the standard deduction their effective federal income tax rate lands around 13% of gross pay.
Social Security and Medicare (FICA)
Separate from income tax, every paycheck is hit with FICA: 6.2% for Social Security and 1.45% for Medicare, taken from the employee side. Your employer pays a matching 6.2% and 1.45% that never shows up on your pay stub.2Office of the Law Revision Counsel. 26 USC Ch. 21 – Federal Insurance Contributions Act
Social Security has a wage cap. In 2026, the 6.2% only applies to your first $184,500 of earnings.3Social Security Administration. What Is the Current Maximum Amount of Taxable Earnings for Social Security Once your year-to-date wages cross that line, Social Security withholding stops and your paychecks get noticeably bigger. Medicare has no cap. If you earn above $200,000 as a single filer or $250,000 filing jointly, an Additional Medicare Tax of 0.9% applies to the excess, pushing the employee-side Medicare rate to 2.35% on the higher earnings.4Office of the Law Revision Counsel. 26 USC 3101 – Rate of Tax
Employers start withholding the extra 0.9% once wages from that employer pass $200,000, regardless of your filing status. If you’re married filing jointly and your household won’t reach $250,000, you can’t ask your employer to stop the withholding mid-year; you claim the overpayment back on your return.5Internal Revenue Service. Questions and Answers for the Additional Medicare Tax
State and Local Taxes
Where you live adds another layer, and the layer varies a lot. Most states impose their own income tax. Some use a flat rate, commonly 3% to 5%. Others use a progressive structure with top rates above 10%. A handful of states charge no income tax on wages at all, which can save thousands of dollars a year compared with a high-tax state.
Counties, cities, and school districts sometimes stack their own payroll taxes on top. These local levies tend to be smaller but still take a bite. If you live in one state and commute to work in another, you may owe taxes to both, though many neighboring states have reciprocity agreements that let you pay only your home state. You typically need to file a withholding exemption form with your employer to make that work. Without it, tax can end up withheld for the wrong state and you’ll sort it out at year-end.
What Shrinks the Government’s Share
Before any bracket math starts, the standard deduction shields a chunk of income from taxation. For 2026:
- Single or married filing separately: $16,100
- Married filing jointly: $32,200
- Head of household: $24,150
These figures were updated under the One, Big, Beautiful Bill Act.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 If your itemized deductions (mortgage interest, state taxes paid, charitable donations) exceed the standard deduction, you can itemize instead.
Tax credits cut your bill dollar-for-dollar rather than reducing taxable income. The Child Tax Credit for 2026 is worth up to $2,200 per qualifying child, with a refundable portion of up to $1,700 for lower-income families.6Internal Revenue Service. Child Tax Credit A parent with two qualifying children can knock $4,400 off their tax bill directly, which for many middle-income households drops the effective federal rate by several percentage points.
Some paycheck deductions work in your favor by lowering the income the government taxes. Traditional 401(k) or 403(b) contributions come out before federal and state income taxes are calculated. For 2026, employees can defer up to $24,500, or $31,000 if age 50 or older.7Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026 Someone in the 22% bracket contributing $10,000 pre-tax saves $2,200 in federal income tax plus whatever their state adds.
Health insurance premiums paid through an employer’s Section 125 cafeteria plan also come out pre-tax, and they reduce FICA withholding as well as income tax. Health Savings Account contributions (limit $4,400 for individual coverage or $8,750 for family coverage in 2026) and dependent care flexible spending accounts work similarly.8Internal Revenue Service. IRS Notice: 2026 HSA Contribution Limits Every one of these deductions shrinks the income figure withholding is calculated against.
A Full Paycheck Breakdown
Here is the math for a single filer earning $100,000 annually in a state with a 5% flat income tax, paid biweekly, contributing 6% to a 401(k) and $200 per paycheck to pre-tax health insurance:
- Gross pay per period: $3,846
- Pre-tax 401(k) (6%): −$231
- Pre-tax health insurance: −$200
- Taxable income for withholding: $3,415
- Federal income tax withholding: roughly −$370
- Social Security (6.2% of gross): −$238
- Medicare (1.45% of gross): −$56
- State income tax (5%): roughly −$171
- Approximate net pay: $2,580
About $1,266 comes off each biweekly check in this scenario, and the worker takes home roughly 67% of gross. Swap in a state with no income tax and the take-home rises above 70%. Add two children qualifying for the Child Tax Credit and the effective federal rate drops further. Two people earning identical salaries can have very different net pay for exactly these reasons.
If You’re Self-Employed
Freelancers, independent contractors, and gig workers face a bigger FICA burden because they pay both halves of the tax. The self-employment tax rate is 15.3%: 12.4% for Social Security (on earnings up to $184,500) and 2.9% for Medicare with no cap.9Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) That sits on top of federal and state income taxes.
You can deduct half of the self-employment tax from gross income when calculating income tax, which softens the double hit a bit. But the cash impact is real. A self-employed person earning $80,000 owes roughly $11,300 in self-employment tax alone before income taxes enter the picture. With no employer withholding for you, quarterly estimated payments are on you as well.
Other Things That Come Off Your Check
Not every deduction is a federal tax. About 18 states and territories require payroll contributions for state disability insurance or paid family leave. The employee share typically runs 0.2% to 1.3% of wages, often capped at a state-specific earnings ceiling. These fund state-run insurance pools that partially replace wages when you can’t work due to illness, injury, or family caregiving. An unfamiliar line item on your pay stub is often one of these programs.
Court-ordered wage garnishments for unpaid debts also come directly out of pay, and your employer has to comply. Federal law caps garnishment for ordinary consumer debt at 25% of disposable earnings per pay period.10eCFR. Maximum Garnishment Limitations Child support and federal student loan defaults follow separate rules, and some state laws set lower limits than the federal cap. A garnishment is taken after taxes are calculated but before you get paid.
Getting Your Withholding Right
Paycheck withholding is an estimate. When you file your annual return, the IRS compares what was withheld throughout the year (plus any estimated payments and refundable credits) against your actual liability. Overpay and you get a refund. Underpay and you owe the difference.
A big refund means you gave the government an interest-free loan for a year. A big balance due means you’ve been holding money that wasn’t really yours. The sweet spot is close enough that you don’t owe a penalty and don’t leave thousands sitting at the Treasury. Your Form W-4 controls how much federal income tax your employer withholds each period, and updating it when life changes (marriage, a new child, freelance income on the side) prevents April surprises.11Internal Revenue Service. About Form W-4, Employee’s Withholding Certificate The form includes a line for requesting additional withholding per paycheck if you have income from sources that aren’t taxed automatically.12Internal Revenue Service. FAQs on the 2020 Form W-4 The IRS offers a free Tax Withholding Estimator on its website to help you dial the number in.