Free US tax calculators — 2026
51 jurisdictions. One paycheck.
97 calculators for federal income tax, state-by-state comparisons, retirement limits, credits, and more — built on source-dated 2026 rules.
- Calculators
- 97
- State guides
- 51
- Tax year
- 2026
Next deadline: Q3 estimated tax payment — 2026-09-15
State income tax burden
$100,000.00 · Single · 2026
Interactive map of estimated state income tax. Use the State dropdown above to choose a state; the map is a visual companion for pointer users.
California
$5,738.64 state tax · 5.7% effective
You keep in California
$73,441.36
$5,738.64 state · 5.7% · after fed + FICA
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Federal & paycheck
Federal Income Tax Calculatorfederal income tax calculator
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Federal & paycheck
Paycheck Calculatorpaycheck calculator 2026
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Federal & paycheck
Tax Refund Estimatortax refund estimator
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Deductions & credits
Child Tax Credit Calculatorchild tax credit calculator
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Retirement & health
401(k) Calculator2026 401k contribution calculator
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Investment & equity
Capital Gains Taxcapital gains tax calculator
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Business & self-employed
Self-Employment Taxself employment tax calculator
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State & relocation
State Income Taxstate income tax calculator
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Retirement & health
2026 Contribution Limits Maximizer2026 contribution limits calculator
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Deductions & credits
EV Tax Credit Deadline CheckerEV tax credit calculator 2026
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International
US Import Tariff & Landed Cost Calculator2026 tariff calculator
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Deductions & credits
SNAP Eligibility & Benefit EstimatorSNAP benefit calculator 2026
Tax by state
51 jurisdictions — 9 with no wage income tax, 15 flat, 27 progressive.
2026 Tax & Trade hub
All tools →High-intent 2026 planners — paycheck, ACA subsidy, 401(k)/HSA limits, SNAP baseline, import tariff landed cost, and EV credit deadline checks.
- Paycheck & tax 2026 Take-home with optional state
- ACA premium subsidy PTC vs advance reconciliation
- 401(k) contributions Catch-up + employer match
- HSA limits Months & last-month rule
- SNAP benefits Federal baseline estimator
- Import tariff Landed cost duty stack
- EV tax credit Sept 30, 2025 cutoff gate
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Directory →Tax insights
All articles →- 2026 Federal Tax Brackets Explained
How the seven ordinary income brackets work for tax year 2026, what inflation adjustments changed from 2025, and how marginal rates differ from your effective rate.
- Standard Deduction 2026: Amounts and When to Itemize
IRS standard deduction amounts for 2026 by filing status, extra amounts for age or blindness, and a practical way to decide whether Schedule A still wins.
- Paycheck Withholding vs Annual Tax Liability
Why take-home pay and your Form 1040 balance due are not the same math, and how to use W-4 settings and estimates so April is not a surprise.
- Social Security Wage Base 2026
The 2026 OASDI wage base is $184,500. Here is what that means for high earners, self-employed filers, and paycheck planning once Medicare continues without a cap.