ReckonBoxWhat your federal income tax actually comes to
Federal income tax is the tax the IRS charges on your taxable income, calculated in slices where each slice of income pays its own bracket rate. The single number at the top of a tax estimator hides that structure. This one shows it.
Take a single filer earning $80,000 in 2026. Subtract the $16,100 standard deduction and $63,900 is taxable. The tax on that is $8,770, and you can trace every dollar of it: the first $12,400 is taxed at 10% ($1,240), the next $38,000 at 12% ($4,560), and the last $13,500 at 22% ($2,970). Add those three and you have the whole bill.
Marginal rate versus effective rate
Your marginal rate is the rate on your next dollar of income; your effective rate is your total tax divided by all your income. They are rarely the same, and confusing them is the most common tax misunderstanding.
That $80,000 single filer sits in the 22% bracket, so 22% is the marginal rate. It applies only to income above $50,400, not to the whole salary. Spread the $8,770 across the full $80,000 and the effective rate is 11.0%, half the marginal figure. When someone worries that a raise will "bump them into a higher bracket" and cost them money overall, this is the gap they are missing: only the dollars inside the new bracket pay the higher rate.
| $80,000 single, 2026 | Amount |
|---|---|
| Taxable income | $63,900 |
| Federal income tax | $8,770 |
| Marginal rate | 22% |
| Effective rate | 11.0% |
The 2026 brackets and why they changed
The 2026 brackets and standard deductions reflect the IRS inflation adjustments in Revenue Procedure 2025-32, issued after the One Big Beautiful Bill Act became law in July 2025. For a single filer, the brackets run 10% up to $12,400 of taxable income, then 12%, 22%, 24%, 32%, and 35%, reaching 37% above $640,600. The married-filing-jointly brackets are exactly double the single ones through the 32% bracket, and the standard deduction is $16,100 single, $32,200 joint, and $24,150 for head of household.
The tool applies your filing status brackets to your income after the deduction you choose, then reports the tax, both rates, and the per-bracket breakdown.
Standard or itemized
You take the standard deduction or you itemize, whichever is larger, never both. For most people the 2026 standard deduction of $16,100 single or $32,200 joint is the bigger number, so they take it without a second thought. Itemizing wins when deductible costs like mortgage interest, state and local taxes, and charitable gifts add up to more than the standard amount. Enter an itemized total here and the calculator uses it in place of the standard deduction.
What this does not cover
This figures federal income tax on the income you enter, using the standard or itemized deduction. It does not model tax credits like the child tax credit or the earned income credit, which reduce tax dollar for dollar after the brackets, nor capital gains taxed at their own rates, the alternative minimum tax, or self-employment tax. It also leaves out Social Security and Medicare and any state income tax, which the salary calculator handles for a paycheck view.
None of this is tax advice for your situation. It shows how the federal brackets turn an income into a tax. For a filing decision or anything involving credits and multiple income types, a CPA or enrolled agent is the right call.
Frequently asked questions
How much federal income tax will I pay for 2026? A single filer with $80,000 of gross income and the $16,100 standard deduction has $63,900 of taxable income and owes $8,770 in federal income tax for 2026. That is a 22% top bracket but an 11.0% effective rate on the full income. Your own figure depends on your filing status, income, and deductions.
What is the difference between the marginal and effective tax rate? The marginal rate is the rate on your last dollar of taxable income, the top bracket you reach. The effective rate is your total tax divided by your income, which is lower because the first dollars are taxed in the cheaper brackets. On $80,000 single, the marginal rate is 22% but the effective rate is about 11%.
How do federal tax brackets work? The US uses a progressive system, so income is split into slices and each slice is taxed at its own rate. For a single filer in 2026, the first $12,400 of taxable income is taxed at 10%, the next slice to $50,400 at 12%, and so on up to 37%. Reaching a higher bracket taxes only the income inside it, not all your income.
What are the 2026 federal income tax brackets? For 2026, single brackets run 10% to $12,400, 12% to $50,400, 22% to $105,700, 24% to $201,775, 32% to $256,225, 35% to $640,600, and 37% above, per the IRS inflation adjustments after the One Big Beautiful Bill Act. Joint brackets are double the single ones through the 32% bracket.
Does this calculator include Social Security, Medicare, or state tax? No, it computes federal income tax on taxable income only, so it isolates how the brackets work. Payroll taxes like Social Security and Medicare, plus any state income tax, are separate. The salary calculator adds those to show your full take-home pay from a paycheck.
Should I take the standard or itemized deduction? You take whichever is larger, since you cannot use both. For 2026 the standard deduction is $16,100 single and $32,200 joint, so itemizing only helps when deductions like mortgage interest, state taxes, and charitable gifts add up to more. This tool lets you enter an itemized total to compare.