How it works
A paycheck has three big tax bites: federal income tax, state income tax, and FICA. Together, they typically eat 22-35% of gross pay before anything else is deducted.
Federal income tax uses a progressive bracket system, where only the income within each bracket is taxed at that rate. State tax varies wildly. Nine states have no income tax at all, and California's top rate hits 13.3%. FICA is a flat 7.65% on most wages, with extras at the top.
net = gross − federal_tax − state_tax − FICA − pre_tax_deductions
Frequently asked
Why is my actual paycheck different from this?
Several reasons: your W-4 might have extra withholding, local city/county taxes, post-tax 401(k) Roth contributions, disability insurance, union dues, garnishments. Your employer might also have rounded calculations. The IRS true-up happens at tax filing time.
Should I contribute to traditional or Roth 401(k)?
Traditional reduces today's tax. Roth doesn't reduce taxes now but grows tax-free. If you expect to be in a lower bracket in retirement, traditional wins. If you expect higher, Roth wins. Most younger workers default to Roth; most peak-career workers default to traditional.
What states have no income tax?
As of 2026: Alaska, Florida, Nevada, New Hampshire (no wage tax, but taxes interest/dividends), South Dakota, Tennessee, Texas, Washington (with a capital gains tax on high earners), and Wyoming. Living in these states keeps the state line at zero, but property tax and sales tax can offset some of the savings.