W-2 employees estimating a refund or balance due
Enter wage income, federal withholding, filing status, credits, and deductions to estimate whether you may receive a refund or owe additional federal tax.
Back to tax calculator
IRS-source-backed calculator guide
2025 and 2026 Federal Tax Calculator Guide
Use the federal income tax calculator to estimate ordinary income tax and compare it with annual payments for a possible refund or balance due. Open the focused tools below for 1099 income, self-employment tax, capital gains or quarterly payment planning.
Guide updated
October 14, 2026
Calculator scope
Federal estimate only
Primary use
Income tax and refund planning
What the calculators estimate
A good tax calculator should explain the calculation path, not only show a final number. IntegraFin's federal income tax estimator starts with selected-year ordinary-income rules, subtracts a basic standard or verified allowed deduction, applies marginal tax brackets, then compares estimated liability with annual payments.
- Tax year selection for 2025 filing or 2026 planning
- Filing status and a basic standard or verified allowed deduction
- Taxable W-2 wages and other income taxed at ordinary rates
- Verified credits, other federal taxes, withholding and estimated payments
- A separate 1099 tool for freelance receipts, expenses and federal tax
- Separate self-employment and capital gains calculators for those questions
2025 and 2026 standard deduction quick table
These basic amounts are used by the federal income tax calculator for eligible filers when the standard deduction option is selected. Additional age or blindness amounts are not calculated automatically.
| Filing status | 2025 | 2026 |
|---|---|---|
| Single | $15,750 | $16,100 |
| Married filing jointly | $31,500 | $32,200 |
| Married filing separately | $15,750 | $16,100 |
| Head of household | $23,625 | $24,150 |
Who should use this tax estimator?
1099 contractors and self-employed taxpayers
Use the separate 1099 calculator for supported freelance income, expenses, federal income tax and self-employment tax. Use the self-employment calculator when you need a focused Social Security and Medicare estimate.
Investors with short-term or long-term gains
Use the separate capital gains calculator to estimate added federal tax on supported net short-term and long-term investment gains.
Small business owners planning quarterly payments
Use the separate quarterly planner with a supported annual tax estimate or an existing projection, then review payment timing and eligibility against your records.
IRS and SSA sources used
Tax estimates need current source data. These references cover federal brackets, standard deductions, capital-gain treatment and the Social Security wage base used across the related calculators. Check each tool for its own source and scope notes.
Frequently asked questions
Is this federal tax calculator a replacement for filing a tax return?
No. It is an estimate for planning. It does not prepare, sign, or file a federal tax return, and final results depend on complete tax documents and IRS processing.
Does the calculator cover both 2025 and 2026?
Yes. The federal income tax estimator lets you choose 2025 filing or 2026 planning and uses the selected year's ordinary-income brackets and basic standard deduction. The separate self-employment and capital gains tools have their own year-specific assumptions and limits.
Does the calculator estimate state taxes?
No. The calculator currently focuses on federal estimates. State and local income taxes, sales taxes, franchise taxes, and local filing rules are outside the calculator scope.
Why can my final refund differ from the calculator result?
A filed federal return can differ because of missing income forms, credit eligibility, deduction limits, special worksheets, additional taxes, penalties or IRS adjustments. This tool is an ordinary-income rate-schedule estimate, not a full return.
Can self-employed taxpayers use the calculator?
Yes. Use the separate 1099 calculator for supported freelance income and expenses with federal income and self-employment tax. The focused self-employment calculator estimates Social Security and Medicare tax on net earnings and can account for entered W-2 wages.
Who should review the estimate with a tax professional?
A review is useful for taxpayers with self-employment income, capital gains, multiple jobs, estimated payments, dependents, IRS notices, business losses, or a large expected balance due.
Choose a focused tax calculator
Start with the calculator that matches the income or payment question you are planning for. For the IRS payment test, safe-harbor benchmarks, and 2026 deadlines, read our 2026 quarterly estimated tax payment guide.
Ready to run the numbers?
Start with the free estimator, then request a professional review when income, credits, self-employment, or capital gains make the final number less clear.