Federal Tax Calculator
Estimate your federal income tax for 2024–2026. Pick filing status, enter gross income, choose standard or itemized deduction.
Source: IRS Rev. Proc. 2024-40 (2025) and 2025-xx (2026 projected)
Tax Tools & Reference
PlainTaxData is built around a small set of tightly scoped tools — each one anchored to an official IRS source, each one updated annually. Use this page to jump straight to the right tool; the longer guides explain the underlying concepts.
How to pick the right tool
If you want a number — your estimated 2026 tax bill, your effective rate, or how a salary bump moves you across brackets — start with the calculator. If you want a reference table you can screenshot and send to a CPA, jump to Brackets by Year or Deductions & Limits. If you want to understand why two filers with the same income owe different tax, read Marginal vs. Effective Tax Rate. Tools and guides cover tax years 2026, 2025, 2024, 2023, 2022, 2021, 2020.
| Tool | Input | Output | Based on |
|---|---|---|---|
| Federal Tax Calculator Interactive | Income, filing status, deduction | Tax owed, marginal rate, effective rate | IRS Rev. Proc. 2024-40 (2025) and 2025-xx (2026 projected) |
| Tax Brackets by Year Lookup | Tax year | Bracket thresholds + rates per filing status | IRS annual Revenue Procedures |
| Standard Deduction & Contribution Limits Lookup | Implicit (current year) | Deduction + contribution + credit table | IRS Pub. 501, 550, 596; annual IR notices |
| IRS Filing Deadlines Reference | — | Date + category timeline | IRS calendar + Rev. Procs. |
| State Tax Comparison Comparison | State (browse) | State income tax rate vs federal | State revenue departments + IRS bracket tables |
| EITC Eligibility Checker Interactive | Income, filing status, children, age, investment income | Eligibility verdict, estimated credit | IRS Rev. Proc. 2024-40 (2026 limits) |
| Marginal Rate Lookup Interactive | Taxable income, filing status, tax year | Marginal rate, effective rate, total tax | IRS Rev. Procs. 2019-44 through 2024-40 |
| Tax Bracket Comparison Interactive | Two tax years, filing status, income | Side-by-side tax owed, bracket table, difference | IRS Revenue Procedures 2020–2026 |
Tax Brackets by Year
Lookup table for marginal income tax brackets across all four filing statuses, every year from 2020–2026.
Source: IRS annual Revenue Procedures
Standard Deduction & Contribution Limits
Standard deduction, capital gains thresholds, IRA / 401(k) / HSA contribution limits, EITC, Child Tax Credit values for the current and prior year.
Source: IRS Pub. 501, 550, 596; annual IR notices
IRS Filing Deadlines
Calendar of tax-season dates, estimated quarterly deadlines, extension cutoffs, refund-window references for the 2026 filing year.
Source: IRS calendar + Rev. Procs.
State Tax Comparison
Combined federal + state effective rate snapshot — useful when a relocation or remote-work move changes the state side of the bill.
Source: State revenue departments + IRS bracket tables
EITC Eligibility Checker
Enter your income, filing status, and number of children to see whether you qualify for the Earned Income Tax Credit and estimate the credit amount.
Source: IRS Rev. Proc. 2024-40 (2026 limits)
Marginal Rate Lookup
Enter your taxable income and filing status to instantly find your federal marginal tax rate — the rate on your next dollar of income — for any year 2020–2026.
Source: IRS Rev. Procs. 2019-44 through 2024-40
Tax Bracket Comparison
Compare federal tax brackets between any two years (2020–2026) for the same income and filing status. Shows how bracket thresholds shifted.
Source: IRS Revenue Procedures 2020–2026
Pair tools with explainers
Related tools across Kiznis Studio
- WageDex
Federal occupational pay benchmarks — pair with the calculator when negotiating salary.
- PlainCost
County-level cost-of-living context for after-tax income comparisons.
- CreatorsCalc
Self-employment / 1099 income calculators — pairs with the quarterly-taxes guide.
- SmallBizCalc
S-corp, payroll, and small-business tax planning calculators.