See exactly what percent of your gross income you actually keep after federal tax, state tax, and FICA — and how to keep more of it.
Most people are surprised by how much they actually keep — and also by how their effective tax rate compares to their marginal rate. Your marginal rate is the rate on your last dollar of income. Your effective rate is what you actually pay as a percentage of all your income. These are very different numbers.
Pre-tax deductions like 401(k) contributions reduce your taxable income dollar-for-dollar — making them significantly more valuable than post-tax savings. Every dollar you put into a 401(k) reduces your federal and state income tax bill by your marginal rate.
The gap between your gross salary and your take-home pay surprises most people when they get their first paycheck. A $70,000 salary in California doesn't mean $5,833 per month in your bank account — it means closer to $4,200 to $4,500 after federal income tax, California state income tax, Social Security, and Medicare. Understanding each piece helps you budget accurately and make smarter decisions about compensation negotiations, retirement contributions, and withholding.
Federal income tax uses a progressive bracket system — you pay different rates on different portions of your income, not one flat rate on everything. In 2026, the first $11,925 of taxable income for single filers is taxed at 10%. The next chunk up to $48,475 is taxed at 12%. The rate climbs through 22%, 24%, 32%, 35%, and tops out at 37% above $626,350. Your standard deduction — $16,100 for single filers in 2026 — reduces your taxable income before brackets apply.
FICA taxes are flat percentages with no deductions or standard deduction to reduce them. Social Security is 6.2% on wages up to the 2026 wage base of $176,100. Once you hit that ceiling, Social Security withholding stops for the rest of the year. Medicare is 1.45% with no cap. High earners pay an additional 0.9% Medicare surcharge on wages above $200,000 (single) or $250,000 (married filing jointly). FICA totals 7.65% for most employees.
Pre-tax deductions — 401(k) contributions, health insurance premiums, HSA contributions, FSA contributions, and dependent care accounts — reduce your taxable income and therefore reduce your federal and state income tax. Contributing $500 per month to a 401(k) doesn't reduce your take-home pay by $500; it reduces it by $500 minus the tax savings. In the 22% federal bracket with 5% state tax, the real cost to your paycheck is about $365.
Nine states have no income tax on wages: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. At the other extreme, California's top rate is 13.3%. For a $100,000 salary, the state tax difference between living in Texas and California is roughly $6,000 to $8,000 per year — a significant factor when evaluating remote work opportunities or job offers in different locations.
The W-4 form tells your employer how much to withhold from each paycheck. The 2020 redesign replaced allowances with a more direct approach — you can now specify additional dollar amounts to withhold or claim dependents and deductions directly. If you consistently get a large refund, you're over-withholding and effectively giving the government an interest-free loan. If you owe significantly at filing, you may face underpayment penalties. The goal is accurate withholding, not a big refund.