How it works
Each fall the IRS raises the tax brackets and the standard deduction to keep up with inflation. If your income stays the same, more of it falls into the lower brackets and less of it is taxed at all. This calculator runs your numbers through both years' rules and shows the difference.
- Pick your filing status and enter your income. Use your income after pre-tax retirement and health deductions, close to line 11 of Form 1040.
- We subtract your deductions: the standard deduction, the extra amount for being 65+ or blind, the new senior deduction, and up to $1,000 of charity if you don't itemize.
- We tax what's left with each year's brackets, the same way the IRS does: the Tax Table under $100,000, the rate schedule above it. Then we take off the Child Tax Credit.
- We compare 2027 with 2026 and explain each change in a sentence.
2026 numbers are official (IRS Rev. Proc. 2025-32). 2027 numbers are projected Projected until the IRS publishes them, from Thomson Reuters Checkpoint and Bloomberg Tax, which agree on every number they both published.
Words you'll see
Standard deduction
A flat amount you subtract from your income before tax is figured. Most people take it instead of listing deductions.
Taxable income
Your income minus your deductions. Tax brackets apply to this number, not your salary.
Tax bracket (marginal rate)
The rate on your last dollar of taxable income. Moving into a higher bracket only taxes the dollars above the line at the higher rate, never your whole income.
Effective rate
Your total federal income tax divided by your income. This is the share you actually pay.
Senior deduction
A new $6,000 deduction for each person 65 or older, for 2025 to 2028. It shrinks once income passes $75,000 ($150,000 for couples filing jointly).
Child Tax Credit
Up to $2,200 per child under 17 in 2026 (projected $2,300 in 2027), subtracted from your tax. Part of it can come back to you as a refund.
Projected vs official
Projected = calculated by tax publishers from inflation data. Official = published by the IRS.
Worked example: Maya, single, $68,000
Maya is 29, rents, and is paid every two weeks. Her income after 401(k) is $68,000 in both years.
- 2026: $68,000 minus the $16,100 standard deduction leaves $51,900 of taxable income. The Tax Table gives $6,136. Her last dollar is in the 22% bracket, but her effective rate is only 9.0%.
- 2027: the standard deduction rises to $16,600, so taxable income drops to $51,400: $5,915. The 12% bracket now runs to $52,025, so her last dollar falls back into 12%.
In 2027 you'd pay about $221 less federal income tax than in 2026. About $8.50 less per paycheck (26 paychecks a year).
What's not included
This is federal income tax on the standard-deduction path only. We don't include state or local tax, Social Security and Medicare (FICA) taxes, itemized deductions, the Earned Income Tax Credit, the $500 credit for other dependents, capital gains rates, self-employment tax, the alternative minimum tax, or filers who are someone else's dependent.
Three new deductions for 2025–2028 also aren't in the calculator yet:
- No tax on tips: up to $25,000, phasing out for MAGI over $150,000 ($300,000 joint).
- No tax on overtime: up to $12,500 ($25,000 joint), phasing out for MAGI over $150,000 ($300,000 joint).
- Car loan interest: up to $10,000, phasing out for MAGI over $100,000 ($200,000 joint).
If any of these apply to you, your real tax will be lower than shown, but the change from 2026 to 2027 is usually close.