Free Tax Refund Calculator (2026)
See your estimated federal refund in seconds. Every number expands to the formula and the IRS source behind it — same input, same output.
Every tax question, one honest answer
Each tool shows its constants, its formulas, and the IRS source they came from. No accounts, no upsells, no inflated estimates.
Tax Refund Calculator
Estimate your 2026 federal tax refund free, with no signup.
Open →Federal Income Tax Calculator
Calculate 2026 federal income tax: taxable income, marginal and effective rate, and a bracket-by-bracket breakdown.
Open →Tax Withholding Calculator
Fine-tune your 2026 W-4: per-paycheck withholding with Step 3/4a/4b/4c, two-jobs checkbox, and bonus 22% flat-rate mode.
Open →Capital Gains Tax Calculator
Estimate 2026 capital gains tax: short vs long term, the §121 home-sale exclusion, netting, and the $3,000 loss limit.
Open →Self-Employment Tax Calculator
Calculate 2026 self-employment tax (15.
Open →Tax Bracket Calculator
Find your 2026 federal tax bracket: marginal rate on the next dollar, effective rate, and how much of your income sits in each bracket.
Open →Estimated Tax Calculator
Work out 2026 quarterly estimated taxes: safe-harbor amounts (100% or 110% of last year's tax) and the four-payment schedule.
Open →State Tax Calculator
Estimate 2026 state income tax for the 10 most populous states, combined with the federal picture.
Open →Three steps to a number you can defend
Enter your numbers
Filing status, W-2 boxes, dependents, state, and OBBBA items like tips and overtime — the same fields the IRS asks for.
See the split
Your refund separates into the withholding you can still adjust this year and credits that only arrive at filing time.
Audit every line
Each step expands to its formula and the exact constant used, with source and verification status — no black box.
Understand the rules behind the numbers
Straight answers
Is the refund calculator really free?
Yes — every calculator is free, no signup, no email gate. Calculations run in your browser, and saved snapshots live in the URL, not on our servers.
Where do the 2026 tax constants come from?
Every constant is listed in a per-page constants module with its source and verification status — IRS-sourced, cross-checked across independent implementations, or pending first-hand verification. The full register is on our methodology page.
Why does my estimate differ from tax software?
Estimators disagree when they hide assumptions. We show every step and cite every constant, so you can see exactly where any two tools diverge — and judge which one is right.
Is this tax advice?
No. Everything here is an estimate for planning, not filing. For a position you need to defend, talk to a qualified tax professional.