US Federal Income Tax Calculator 2026

This calculator estimates the federal income tax a US resident owes for tax year 2026 — the return you file in early 2027. It applies the 2026 brackets and standard deduction the IRS published after the One Big Beautiful Bill Act, the $2,200 child tax credit, the new $6,000 deduction for people 65 and older, and optionally Social Security and Medicare withholding, to estimate income remaining after federal taxes.

How to use this tool

1. Choose your filing status.
2. Enter yearly wages (and your spouse's if filing jointly) plus any other ordinary income.
3. Add pre-tax 401(k) contributions and, if you itemize, your itemized deductions.
4. Enter children under 17, other dependents and anyone aged 65 or older.
5. Read your tax, effective rate and the bracket breakdown.

Formula

Taxable income = wages + other income − 401(k) − max(standard, itemized) − senior deduction; Tax = Σ (income in each bracket × bracket rate) − credits

2026 standard deduction: $16,100 single or married filing separately, $32,200 joint, $24,150 head of household, plus $2,050 (unmarried) or $1,650 (married) for each person 65+. The senior deduction is $6,000 per person, reduced by 6% of income above $75,000 ($150,000 joint). The child credit falls by $50 for every $1,000 of income above $200,000 ($400,000 joint).

Example

A single filer earning $75,000 in wages takes the $16,100 standard deduction, leaving $58,900 of taxable income. The first $12,400 is taxed at 10% ($1,240), the next $38,000 at 12% ($4,560) and the last $8,500 at 22% ($1,870), for $7,670 of federal income tax — an effective rate of 10.23%. Social Security and Medicare add $5,737.50, leaving about $61,592.50 after federal taxes.