Income Tax Calculator 2026 - Federal and State Tax Estimator

Income tax is a tax imposed by the federal government on the earnings of individuals and businesses. It is the largest source of revenue for the US government, funding everything from national defense to infrastructure, social programs, and public education. Every US citizen and resident alien is subject to federal income tax on their worldwide income, subject to certain thresholds and exclusions.

The federal income tax system is progressive, meaning higher levels of income are taxed at higher rates. This does not mean that all of your income is taxed at your highest bracket. Instead, income is divided into segments, and each segment is taxed at its corresponding rate. For example, if you are single and earn $60,000 in taxable income, the first portion is taxed at 10%, the next portion at 12%, and the remainder at 22%. This graduated structure means your effective tax rate is always lower than your marginal rate.

For 2026, the IRS has updated bracket thresholds for inflation. The seven federal tax brackets remain 10%, 12%, 22%, 24%, 32%, 35%, and 37%, but the income ranges at which each bracket applies have shifted upward. Understanding these brackets is essential for tax planning, whether you are estimating your annual liability, planning estimated payments, or evaluating the tax impact of a raise or investment gain.

Enter your filing status, gross income, pre-tax deductions, and any applicable credits. The calculator estimates your federal tax liability and effective tax rate for the 2026 tax year.

Filing Status

Select your filing status: Single, Married Filing Jointly, Married Filing Separately, or Head of Household. Your filing status determines your standard deduction amount and the bracket thresholds that apply to your income. Head of Household status is available to unmarried taxpayers who pay more than half the cost of keeping up a home for a qualifying dependent.

Income and Deductions

Enter your total gross income, which includes wages, interest, dividends, and other taxable income sources. Then enter any pre-tax deductions such as 401(k) contributions, health savings account contributions, or other adjustments. These reduce your adjusted gross income (AGI) and ultimately your taxable income.

Standard vs Itemized Deductions

The calculator applies the standard deduction by default. If your itemized deductions (mortgage interest, state and local taxes up to $10,000, charitable contributions, medical expenses above a threshold) exceed the standard deduction, enter the itemized amount for a more accurate result.

The basic formula for calculating federal income tax is: Taxable Income = Gross Income − Adjustments − Standard Deduction (or Itemized Deductions).

Once you have taxable income, apply the progressive brackets: Federal Tax = Σ(Income in Bracket × Bracket Rate). Each bracket rate applies only to the income falling within that bracket range. The sum across all brackets gives your total federal income tax before credits.

After calculating tax from brackets, subtract applicable tax credits such as the Child Tax Credit ($2,000 per qualifying child for 2026) and other credits. The result is your net federal tax liability. Your effective tax rate is then: Effective Rate = Total Tax ÷ Taxable Income × 100.

Example 1: Single Filer, $75,000 Income

A single filer earning $75,000 with a $15,700 standard deduction has $59,300 in taxable income. The first $11,925 is taxed at 10% ($1,192.50), the next $36,549 (12% bracket) at 12% ($4,385.88), and the remaining $10,826 (22% bracket) at 22% ($2,381.72). Total federal tax before credits is approximately $7,960, giving an effective rate of about 10.6%.

Example 2: Married Filing Jointly, $150,000 Combined Income

A married couple filing jointly with $150,000 combined income and a $31,400 standard deduction has $118,600 in taxable income. The first $23,850 is taxed at 10% ($2,385), the next $73,099 at 12% ($8,771.88), and the remaining $21,651 at 22% ($4,763.22). Total federal tax before credits is approximately $15,920, an effective rate of about 10.6%.

Example 3: Head of Household, $100,000 Income with Two Children

A head of household earning $100,000 with $23,500 standard deduction has $76,500 in taxable income. After bracket calculations totaling approximately $11,500 in tax, the $4,000 Child Tax Credit (two children at $2,000 each) reduces the liability to about $7,500. The effective rate after credits is roughly 9.8%.

Maximize Pre-Tax Contributions

Contributions to traditional 401(k) plans, traditional IRAs, HSAs, and other pre-tax accounts reduce your adjusted gross income. Every dollar contributed pre-tax lowers your taxable income, potentially pushing you into a lower bracket. For 2026, you can contribute up to $23,500 to a 401(k) and $7,000 to an IRA (plus catch-up contributions if you are 50 or older).

Understand Your Marginal Rate

Your marginal tax rate is the rate on your next dollar of income. Knowing this helps you evaluate whether a deduction or income shift is worthwhile. If your marginal rate is 24%, a $1,000 deduction saves you $240 in tax. If your marginal rate is 12%, the same deduction saves you only $120. This is why tax planning is especially valuable for middle- and upper-income earners.

Don't Forget State Taxes

This calculator estimates federal tax only. Most states also impose an income tax ranging from 0% to over 13%. Your total tax burden depends on both federal and state rates. If you live in a state with no income tax (such as Texas, Florida, or Washington), your federal estimate is closer to your total income tax. Residents of high-tax states like California or New York should factor in state tax separately.

Use Estimated Payments if Self-Employed

If you earn income that is not subject to withholding, such as freelance or business income, you may need to make quarterly estimated tax payments to avoid penalties. Use this calculator to estimate your annual liability, then divide by four to determine your quarterly payment. Missing estimated payments can result in IRS penalties even if you pay your full tax liability by the April deadline.

All content on this page is educational and does not constitute tax advice. Please consult a qualified tax professional for your specific situation.