How Take-Home Pay Is Calculated
Your take-home pay (net pay) is your gross pay minus all taxes and deductions. The order matters -- pre-tax deductions reduce your taxable income before taxes are calculated, making them more valuable than post-tax deductions.
Gross Pay
− Pre-tax deductions (401k, health insurance, HSA, FSA)
= Taxable Income
− Federal income tax (progressive brackets)
− FICA: Social Security (6.2%) + Medicare (1.45%)
− State income tax
− Local / city tax
− Post-tax deductions (Roth 401k, life insurance, garnishments)
= Net Pay (Take-Home)
Pre-Tax vs Post-Tax Deductions
Pre-tax deductions (traditional 401k, health insurance, HSA, FSA) reduce your taxable income dollar-for-dollar. If you're in the 22% federal bracket and a 5% state, a $500/month pre-tax 401k contribution saves you roughly $135 in taxes every month -- meaning it only "costs" you $365 in take-home pay to put $500 into retirement savings.
Post-tax deductions (Roth 401k, some life insurance, wage garnishments) come out after taxes are calculated, so they don't reduce your tax bill -- but Roth contributions grow tax-free and provide tax-free income in retirement.
The 401k pre-tax advantage: If you contribute 6% of a $75,000 salary ($4,500/yr) to a traditional 401k, your taxable income drops to $70,500. At a combined 27% marginal rate, that saves you $1,215 in taxes this year -- every year -- while building retirement wealth. The Roth version forgoes the immediate tax savings but provides tax-free growth.
Federal Income Tax Brackets (2026)
Federal income tax uses a progressive system -- only the income in each bracket is taxed at that bracket's rate. Your "marginal rate" is the rate on your last dollar of income; your "effective rate" is the average across all brackets.
| Tax Rate | Single Filers | Married Filing Jointly |
| 10% | $0 -- $12,050 | $0 -- $24,100 |
| 12% | $12,051 -- $49,050 | $24,101 -- $98,150 |
| 22% | $49,051 -- $104,800 | $98,151 -- $209,650 |
| 24% | $104,801 -- $200,000 | $209,651 -- $400,000 |
| 32% | $200,001 -- $254,100 | $400,001 -- $508,200 |
| 35% | $254,101 -- $635,300 | $508,201 -- $763,100 |
| 37% | Over $635,300 | Over $763,100 |
Standard deduction 2026: $15,700 (single), $31,400 (married filing jointly), $23,600 (head of household). Applied before bracket calculation.
Frequently Asked Questions
Why is my paycheck lower than I expected?
The most common surprises: (1) FICA taxes -- Social Security (6.2%) and Medicare (1.45%) are automatically withheld from every paycheck regardless of your filing status or credits; (2) State taxes -- if you moved states or forgot to update your W-4, your withholding may be off; (3) Pre-tax deductions like 401k and health insurance reduce take-home pay even though they benefit you; (4) W-4 elections -- if you claimed 0 allowances or added extra withholding, you'll get a smaller paycheck but a larger refund at tax time. Check your pay stub line by line to see exactly where each dollar goes.
What is FICA and can I opt out?
FICA (Federal Insurance Contributions Act) funds Social Security (6.2% up to the $180,000 wage base in 2026) and Medicare (1.45% with no cap, plus an additional 0.9% for income over $200,000 single/$250,000 married). Most employees cannot opt out of FICA. Self-employed individuals pay both the employee and employer portions -- the full 15.3% -- though they can deduct the employer half. Government workers hired before 1984 may be in separate pension systems exempt from Social Security.
How do I increase my take-home pay legally?
The most effective strategies: (1) Maximize pre-tax deductions -- every dollar in a traditional 401k, HSA, or FSA reduces your taxable income and your tax bill; (2) Update your W-4 -- if you're getting a large refund each year, you're over-withholding interest-free loans to the IRS. Adjust to withhold less and take home more each paycheck; (3) Contribute to an HSA -- triple tax advantage (pre-tax contributions, tax-free growth, tax-free withdrawals for medical); (4) Use your FSA -- healthcare FSA funds healthcare expenses with pre-tax dollars, effectively giving you a discount equal to your tax rate on those expenses.
What is the difference between marginal and effective tax rate?
Your marginal rate is the tax rate on your last dollar of income -- the highest bracket you reach. If you're in the 22% bracket, your marginal rate is 22%. Your effective rate is the average rate across all your income after deductions -- typically much lower. On a $75,000 salary (single), your effective federal tax rate is roughly 12%--14%, even though your marginal rate is 22%. This distinction matters when evaluating decisions: a $1,000 bonus is taxed at your marginal rate (22% in this example), not your effective rate.
Which states have no income tax?
Nine states have no general income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. New Hampshire taxes interest and dividends but not earned income (wages). Washington has no income tax but has a capital gains tax above $262,000. No-income-tax states often compensate through higher sales taxes and property taxes. If you live near a state border, also check whether your work state has a reciprocity agreement with your home state.
How does the W-4 affect my paycheck?
The W-4 (redesigned in 2020) tells your employer how much federal income tax to withhold from each paycheck. Key sections: Step 2 -- check this if you have multiple jobs or a working spouse; Step 3 -- claim child tax credits to reduce withholding; Step 4b -- enter additional deductions to reduce withholding further; Step 4c -- add extra withholding per paycheck if you want to avoid owing at tax time. Filing "Exempt" means no federal tax is withheld -- only valid if you had zero tax liability last year and expect the same this year.