Free, browser-only calculators

Tax Year 2026 Calculators

Free calculators built on published IRS figures for tax year 2026 (returns filed in 2027).

Every calculator runs entirely in your browser. Nothing is uploaded, there is no account, no database and no server-side processing. Each tool uses only figures published by the IRS, the Social Security Administration or another federal release for tax year 2026, the return filed in 2027. Where an official release states a threshold but does not publish a rate, the tool stops at the threshold instead of guessing.

All twenty-three calculators, grouped by topic

Income tax basics

• 2026 Federal Income Tax Calculator

  Estimate 2026 federal income tax using the official IRS Rev. Proc. 2025-32 brackets and standard deduction. See a full per-bracket breakdown.

• 2026 Tax Bracket Finder

  Enter taxable income to find your 2026 federal marginal bracket, see the exact thresholds, and measure how much room remains before the next rate.

• 2026 Standard Deduction Calculator

  Look up the official 2026 standard deduction for single, joint, head of household and separate filers, with the 2025 comparison and dollar increase.

• Marginal vs Effective Tax Rate Calculator

  See the difference between your 2026 top marginal bracket and your true effective rate, with a dollar-by-dollar bracket slice table.

• 2026 Marriage Penalty or Bonus Calculator

  Compare the federal tax on two single returns against one joint return using official 2026 brackets, and measure the penalty or bonus in dollars.

• 2026 Standard Deduction Increase: What It Saves

  The 2026 standard deduction rose by $350, $700 or $525. Convert that inflation adjustment into an estimated federal tax saving at your marginal rate.

Payroll and self-employment

• 2026 Payroll Tax Calculator

  See how much Social Security and Medicare tax comes out of a 2026 paycheck, where the wage base cap applies, and when the extra 0.9% starts.

• 2026 Self-Employment Tax Calculator

  Calculate 2026 self-employment tax from net profit: the 92.35% base, the 12.4% Social Security cap, the 2.9% Medicare layer and the deductible half.

• 2026 Standard Mileage Deduction Calculator

  Calculate a 2026 mileage deduction using both rates: 72.5 cents before July 1 and 76 cents after, plus the fixed 14 cent charitable rate.

• 2026 Estimated Tax Calculator

  Work out the annual payment that avoids the underpayment penalty in 2026, using both safe harbors, then divide it into four installments.

Retirement and health accounts

• 2026 Roth IRA Contribution Limit Calculator

  Find the 2026 Roth IRA limit of $7,500 or $8,600, then see exactly how the income phaseout reduces it dollar by dollar across the range.

• 2026 Traditional IRA Deduction Calculator

  Check how much of a 2026 traditional IRA contribution is deductible, using workplace plan coverage and the four published income phaseout ranges.

• 2026 Retirement Contribution Limits

  Every 2026 retirement limit in one place: 401(k), IRA and SIMPLE amounts for under 50, ages 50 to 59, and the higher ages 60 to 63 catch-up.

• 2026 HSA Contribution Limit Calculator

  Work out your 2026 HSA limit from coverage tier, age and months of eligibility, including the $1,000 catch-up and the monthly proration rule.

• 2026 Saver's Credit Eligibility Checker

  Check whether your 2026 income falls under the Saver's Credit ceiling for your filing status, with the 2025 figures alongside for comparison.

Investment and estate

• 2026 AMT Exemption Threshold Checker

  Check the 2026 alternative minimum tax exemption amounts and the income levels where the exemption begins to phase out under IRS Rev. Proc. 2025-32.

• 2026 Estate Tax Exclusion Calculator

  Compare the $15,000,000 federal estate tax exclusion for 2026 with the 2025 amount and see the portion of an estate above the exclusion.

• 2026 Gift Tax Annual Exclusion Calculator

  See how much you can give in 2026 without touching the lifetime exemption: $19,000 per recipient, doubled by gift splitting, plus the spousal exception.

• 2026 Capital Gains Tax Calculator

  Work out federal tax on a long-term gain by stacking it on your other income, then add the 3.8% net investment income tax where it applies.

Filing, credits and special situations

• 2026 Senior Deduction Eligibility Checker

  Check eligibility for the temporary $6,000 senior deduction under the 2025 tax law, including age, filing status and MAGI phaseout thresholds.

• 2026 Adoption Credit Calculator

  Estimate the 2026 federal adoption credit using the $17,670 maximum and the $5,120 refundable limit published by the IRS.

• 2026 Foreign Earned Income Exclusion Calculator

  Apply the 2026 foreign earned income exclusion of $132,900 to wages earned abroad, and see how much foreign income remains in the US tax base.

• Do You Have to Pay to File Your 2026 Return?

  Check whether you qualify for IRS Free File or a free volunteer program for your 2026 return, and see what pushes a filer into paid software.

Reference

• What Changed for 2026 Taxes

  Every federal tax figure that changed for tax year 2026, with the 2025 number beside it and a link to the calculator that applies it.

• 2027 Tax Brackets and Standard Deduction

  The 2027 federal brackets, standard deduction and credit amounts from IRS Rev. Proc. 2026-35, with the 2026 figures beside them for comparison.

• 2027 Benefit and Payroll Limits

  The 2027 health savings account limits, high-deductible plan thresholds, FSA cap and Social Security wage base, with the 2026 figures alongside.

Why these numbers are traceable

14 federal releases are cited across this site, and each page lists only the ones that actually state its figures. Every page carries the date the values were checked. Head of household and married filing separately deduction amounts are shown as reference data, but the release used here publishes rate thresholds only for single and joint filers, so no bracket-based tax is computed for the other two statuses.