How this is calculated
Taxable income = gross − $15,000 standard deduction. Federal tax is charged in slices: 10% on the first $11,925 of taxable income, 12% to $48,475, 22% to $103,350, 24% to $197,300, 32% to $250,525, 35% to $626,350, and 37% above that. FICA runs on gross, not taxable income: Social Security at 6.2% up to the $176,100 wage base, Medicare at 1.45% with no ceiling, plus 0.9% on wages over $200,000.
Worked example on $85,000: taxable income is $70,000. That is $1,192.50 at 10%, $4,386.00 at 12%, and $4,735.50 at 22% — federal income tax of about $10,314. FICA adds $5,270 in Social Security and $1,232.50 in Medicare. Total deductions around $16,817, so net is roughly $68,183, or $5,682 a month.
The effective rate there is about 19.8%, while the top bracket touched is 22%. That gap is the whole point of a progressive system, and it is why quoting your bracket as your tax rate always overstates what you pay.
Why the Social Security cap matters more than the brackets
Social Security stops at the wage base — $176,100 — and does not resume. Above that line your marginal FICA drops from 7.65% to 1.45%, so the first dollar over the cap is taxed noticeably more lightly than the dollar before it.
This is the one genuinely regressive step in the federal system, and it partly offsets the jump into the 32% income tax bracket that happens nearby. Someone going from $170,000 to $190,000 sees a smaller increase in total deductions than the bracket table alone suggests.
What this estimate leaves out
State and local income tax, which is the largest omission. Nine states levy none; California, Hawaii, New York and New Jersey top 10%. New York City and a handful of other municipalities add a local income tax on top of the state one.
Also excluded: 401(k) and HSA contributions, which reduce taxable income and are usually the biggest lever an employee actually controls; employer-sponsored health insurance premiums, which are typically pre-tax; itemised deductions where they beat the standard deduction; and the filing statuses other than single, which move every bracket threshold.
How to use the united states salary calculator
- Enter your annual gross salary. Use the headline figure from your contract or offer letter, in $, before any deductions.
- Read the net and monthly rows. Net salary is what remains for the year; take-home per month is that divided by twelve.
- Check the effective rate. Income tax and Social Security + Medicare as a share of gross. This is the number to compare across countries — not the top bracket rate, which almost nobody actually pays on their whole income.