A tax bracket is a layer, not a label for your whole income. Moving into a higher bracket taxes only the dollars inside that layer. The marginal rate is the rate on the next dollar. The effective rate is the blend, and it is lower. Confusing the two is how a raise gets described as if it disappeared.
How ordinary income is stacked
Taxable income is what remains after pre-tax retirement contributions and after the larger of the standard deduction or your itemized deductions. The 2024 standard deduction used here is $14,600 for single filers, $29,200 for married filing jointly, and $21,900 for head of household. Itemizing helps only when your deductions beat that amount.
The table on the calculator shows how much income landed in each layer. Dollars in the 10 percent and 12 percent layers stay there even if your last dollar is taxed at 22 percent. A raise is taxed in the top bracket only for the part that crosses the threshold.
Paycheck taxes are not all income tax
Employees also pay Social Security tax on wages up to the annual wage base and Medicare tax on all wages, plus an extra Medicare tax above a high threshold. A traditional 401(k) contribution reduces income tax in this tool. It does not reduce FICA.
Take-home pay here is gross income minus federal income tax, FICA, and a flat state rate. It is not a paycheck stub. Benefits, health insurance, and a state with its own brackets will make the real paycheck different. The state line is a flat percent of taxable income, which is an estimate, not your state’s form.
What this estimate is for
Use it to see the shape of the bill: which bracket you are in, what a pre-tax contribution saves, and how much of the total is payroll tax rather than income tax. Credits, such as the child tax credit, are not applied. They can lower the bill after the bracket math.
The brackets, standard deduction, and Social Security wage base are the 2024 figures, matching the rest of these tools. Long-term capital gains and qualified dividends are taxed as ordinary income here, which overstates the bill if a large share of your income is in those categories. Check a current-year source before you file.
How to use the federal tax estimator calculator
Taxable income is income after the retirement contribution and after the larger of the standard deduction or your itemized deductions. Ordinary income is taxed in layers. The marginal rate is the rate on the last dollar. The effective rate is total tax divided by gross income, and it is lower than the marginal rate because earlier dollars are taxed in cheaper brackets. Take-home pay here is gross income minus federal income tax, FICA, and a flat state rate. It is not a paycheck stub.
- Choose a filing status. The brackets and the standard deduction change with it.
- Enter wages, other income, and pre-tax retirement contributions.
- Enter itemized deductions only if they are higher than the standard deduction. Otherwise leave them at zero.
- Read taxable income, the marginal bracket, and take-home pay after federal tax, FICA, and the state rate you entered.
How the math works
Brackets are layers
Moving into the 22% bracket does not tax your entire income at 22%. Only the dollars inside that bracket are taxed at 22%. Earlier dollars stay in the 10% and 12% layers. The table on the calculator shows how much income landed in each layer.
The standard deduction
The 2024 standard deduction used here is $14,600 for single filers, $29,200 for married filing jointly, and $21,900 for head of household. Itemizing helps only when your deductions exceed that amount.
FICA is separate
Employees pay 6.2% Social Security tax on wages up to the annual wage base and 1.45% Medicare tax on all wages, plus an extra 0.9% Medicare tax above a high threshold. Retirement contributions entered here reduce income tax. They do not reduce FICA.
Single filer, $95,000 of wages
The defaults add $4,000 of other income, a $6,000 pre-tax retirement contribution, no itemized deductions, and a 5% state rate.
Federal income tax is about $12,300. The marginal bracket is 22%. FICA is about $7,300. With the state estimate, total tax is about $23,500. Take-home pay is about $75,500, an effective rate near 24% of gross income.
Terms worth knowing
- Marginal rate
- The tax rate on your next dollar of ordinary income.
- Effective rate
- Total tax divided by gross income. It blends every bracket and payroll tax.
- Standard deduction
- A fixed amount subtracted from income if you do not itemize.
- FICA
- Social Security and Medicare taxes on wages.
What to do with the number
A pre-tax 401(k) contribution reduces taxable income. Use it to see the tax savings, not only the retirement balance.
Do not itemize in this tool unless your deductions beat the standard deduction. Otherwise you will overstate the deduction.
The state line is a flat percent of taxable income. It will not match a state with its own brackets.
Credits, such as the child tax credit, are not in the result. They can lower the bill after the bracket math.
Questions people ask
What this leaves out
Federal brackets, the standard deduction, and the Social Security wage base are the 2024 figures.
Income is ordinary income. Long-term capital gains and qualified dividends are not given their lower rates.
The state tax is a flat percent of federal taxable income.
Credits, the alternative minimum tax, and additional Medicare details beyond the extra 0.9% are not included.
These figures are estimates to help you understand the tradeoff. They are not tax, legal, insurance, or investment advice. A fiduciary can look at the same numbers in the context of the rest of your plan.