Salary Paycheck Calculator 2026 — Federal Tax Estimator

Enter your salary and see exactly how much federal tax comes out of each paycheck in 2026. This free US salary tax estimator uses the official 2026 IRS brackets and the $16,100 standard deduction for single filers to work out your federal income tax, your effective rate and your monthly take-home pay.

How to Use the Salary Tax Estimator

1. Enter your annual gross salary — your total pay before any deductions, the number on your offer letter or W-2 box 1 plus pre-tax items.
2. Enter your pre-tax 401(k) contributions for the year. Only traditional (not Roth) contributions count, because only they reduce taxable income. If you are unsure, check your most recent pay stub and multiply one paycheck's contribution by your number of pay periods.
3. Press Calculate My Tax.

The calculator subtracts your 401(k) contributions and the 2026 standard deduction for single filers ($16,100) from your salary to get taxable income, then runs that income through the seven official 2026 IRS brackets. You get four numbers back: estimated federal tax, taxable income, your marginal and effective rates, and an estimated monthly take-home figure.

Note what is left out: state and local taxes, Social Security/Medicare (FICA), and any credits or itemized deductions — so your real take-home will be lower than the figure shown. See Limitations below.

How the 2026 Federal Tax Calculation Works

The US taxes ordinary income in layers called marginal brackets. Each slice of your taxable income is taxed at its own rate — only the dollars inside a bracket pay that bracket's rate. For tax year 2026, the IRS (Revenue Procedure 2025-32) set these single-filer brackets:

Your tax is the sum of each layer: 10% of the first $12,400, 12% of the next chunk up to $50,400, and so on. Two rates summarize the result. The marginal rate is the rate on your last dollar — the bracket your top slice lands in. The effective rate is total tax divided by total salary, and it is always lower than the marginal rate. The calculator shows both, because confusing the two is the most common tax mistake Americans make.

Worked Example: $80,000 Salary in 2026

Take a single filer earning $80,000 with no 401(k) contributions. Step by step:

This person hears "22% bracket" and assumes they lose nearly a quarter of their pay to the IRS. In reality they keep about 89% of every gross dollar against federal income tax. The $8,770 is real, but the 22% applies only to the top $13,500 of taxable income.

Marginal vs. Effective Tax Rate: What Most Calculators Don't Explain

Here is the insight competitors bury: your tax bracket is not your tax rate. Being "in the 22% bracket" means your last dollars are taxed at 22% — your first $12,400 are still taxed at 10% and the next $38,000 at 12%. That is why the $80,000 earner above pays an effective rate of just 10.96%, less than half their marginal rate.

This misunderstanding costs people real money. Some turn down overtime or a raise fearing it will "bump them into a higher bracket" — impossible, since only the dollars above the line face the higher rate. Others over-withhold dramatically or avoid pre-tax savings because they overestimate what the IRS takes. The effective rate is the number that matters for budgeting: total tax divided by total income. It is also why two people in the same bracket can have very different effective rates — deductions, 401(k) contributions, and where income falls inside the bracket all change it. Whenever you see a headline about someone's tax bracket, ask for their effective rate instead. That is the truth about their tax burden.

Limitations

This simplified estimate covers only single filers taking the 2026 standard deduction; married, head-of-household, and itemizing filers will differ. It ignores tax credits, capital gains rates, the alternative minimum tax, self-employment tax, and all state and local taxes. It also excludes FICA — Social Security (6.2%) and Medicare (1.45%, plus 0.9% over $200,000) — which can exceed the federal income tax itself for middle earners. Figures come from IRS Revenue Procedure 2025-32; Congress can change tax law. This is a planning estimate, not tax advice.

Sources & References

The 2026 brackets, standard deduction and rates used above come straight from the IRS. For the official figures — or to check your real withholding against them — start here:

• IRS — Federal income tax rates and brackets: the official 2026 federal brackets and standard deduction amounts.
• IRS — Tax Withholding Estimator: the IRS’s own tool for checking whether the withholding on your W-4 matches your expected tax bill.

Once you know what a salary really nets, two follow-ups pay for themselves: trim the weekly shop with the guide to comparing unit prices, and make sure the retirement slice is maxed correctly using the 2026 401(k) contribution limits, including the employer-match rules that decide whether you are leaving money on the table.

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