Federal Income Tax Estimator: Walking Through 2026 Brackets
Estimating your 2026 federal tax liability is mostly mechanical: gross income → adjustments → standard or itemized deduction → taxable income → bracket math → credits. The calculator does the arithmetic, but you'll get a more accurate number if you understand which line each input affects.
Step 1 — Gross income and adjustments
Enter wages from your W-2 box 1, plus interest (1099-INT), dividends (1099-DIV), capital gains (1099-B), and any side income (1099-NEC). Subtract above-the-line adjustments: 401(k) employee contributions (already excluded from W-2 box 1), HSA contributions, traditional IRA contributions if eligible, student loan interest (up to $2,500), and self-employed health insurance.
Result: your Adjusted Gross Income (AGI). Many tax credits and deduction phase-outs use AGI as the trigger, so accuracy here matters.
Step 2 — Apply the standard deduction or itemize
For 2026, the IRS standard deduction is $15,000 single / $30,000 married filing jointly / $22,500 head of household (per most recent inflation-adjusted Rev. Proc.). Most filers (about 90%) take the standard.
Itemize if SALT (capped at $10,000) + mortgage interest + charitable giving + medical above 7.5% AGI exceeds your standard deduction. Subtract the larger of the two from AGI to get taxable income.
Step 3 — Run the brackets and apply credits
2026 federal brackets for single filers (per the latest IRS Rev. Proc. inflation adjustment): 10% on first $11,925, 12% to $48,475, 22% to $103,350, 24% to $197,300, 32% to $250,525, 35% to $626,350, and 37% above. Married filing jointly brackets are roughly double the single thresholds.
Taxable income $80,000 single → $11,925 × 10% + $36,550 × 12% + $31,525 × 22% = $13,529 before credits. Apply Child Tax Credit ($2,000/child under 17, phase-out at $200K single / $400K MFJ), Saver's Credit, and education credits to get the final number.
Frequently asked questions
Are 2026 brackets confirmed?
The IRS publishes inflation-adjusted brackets each fall via Rev. Proc. for the following tax year. Always verify on irs.gov before filing — Congress also occasionally passes legislation that changes brackets mid-year.
What's the difference between marginal and effective tax rate?
Marginal is the rate on your last dollar (the bracket you're in). Effective is total tax divided by taxable income — almost always lower than marginal. The $80,000 single example above has a 22% marginal rate but a 16.9% effective rate.
Does this account for state tax?
No — the calculator handles federal only. State income tax is a separate calculation: 9 states have no income tax, 10 have flat rates, and the rest use brackets similar to federal. Your CPA or tax software handles both.
Try the related calculator
Turn the idea into a number by entering your own values and comparing a few scenarios.
Browse finance calculatorsLast reviewed on 2026-04-26 by the Mega Calculators editorial team in line with our editorial standards.