Tax Calculator

US tax calculator estimates your 2026 federal and state income tax, effective tax rate, and after-tax income. On $85,000 filing single with the standard deduction, expect roughly $10,300 federal tax and an effective rate near 12.1%.

Enter Values

Result

Enter values above and click Calculate to see your result.

AI Assistant

Ask about this calculator

I can help you understand the tax calculator formula, interpret your results, and answer follow-up questions.

Try asking

Formula

#
Core Formula
Taxable Income = Gross - Deduction - Pre-tax contributionsFederal Tax = sum of progressive bracket amountsPayroll = 6.2% SS (capped) + 1.45% MedicareState Tax = Taxable Income x State RateAfter-Tax = Gross - Federal - State - Payroll

How it works: The tool applies simplified bracket logic and payroll taxes for planning estimates.

Worked Example

Gross income $85,000, filing single, standard deduction ($14,600 for 2024).
1Step 1: Taxable income = $85,000 - $14,600 = $70,400.
2Step 2: Federal tax using 2024 brackets: 10% on first $11,600 = $1,160, 12% on $11,601 to $47,150 = $4,266, 22% on $47,151 to $70,400 = $5,115. Total federal tax = $10,541.
3Step 3: Effective rate = $10,541 / $85,000 = 12.4%.
4Step 4: After-tax income before state tax = $74,459.

How US Income Tax Is Calculated

Federal income tax uses progressive brackets where different portions of your income are taxed at increasing rates. Your effective rate is always lower than your marginal bracket.

  • Taxable income = gross income minus deductions (standard or itemized) and pre-tax contributions (401k, health insurance)
  • Progressive brackets mean only income above each threshold is taxed at the higher rate, not your entire income
  • Filing status (single, married, head of household) determines bracket widths and standard deduction amounts
  • State taxes vary from 0% (Texas, Florida, Nevada) to over 13% (California), significantly affecting take-home pay

This is a planning estimate, not tax advice. Consult a tax professional or use IRS tools for filing accuracy.

You can also calculate changes using our Salary Calculator, Commission Calculator or Mortgage Calculator.

Frequently Asked Questions

How much federal tax do I owe on $85,000 filing single?

On $85,000 filing single with the standard deduction ($14,600), your taxable income is $70,400. Federal tax is approximately $10,541: 10% on the first $11,600, 12% on $11,601 to $47,150, and 22% on $47,151 to $70,400. Your effective federal rate is about 12.4%.

What is the difference between marginal and effective tax rate?

Your marginal rate is the bracket on your last dollar of income. At $85,000 single, that is 22%. Your effective rate is total tax divided by total income, roughly 12.4%, because earlier dollars are taxed at 10% and 12%. You never pay your top bracket rate on all income.

How much does a 401k contribution reduce my taxes?

Every dollar contributed to a traditional 401(k) reduces your taxable income dollar-for-dollar. If you are in the 22% bracket and contribute $10,000, you save approximately $2,200 in federal tax. The 2024 contribution limit is $23,000 ($30,500 if age 50 or older).

Which states have no income tax?

Nine states have no state income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. Residents of these states keep more take-home pay but may face higher property or sales taxes.

Should I itemize or take the standard deduction?

Itemize only if your total deductions (mortgage interest, state and local taxes up to the $10,000 SALT cap, charitable donations, medical expenses above 7.5% of AGI) exceed the standard deduction. For 2024, the standard deduction is $14,600 (single) or $29,200 (married filing jointly). About 87% of filers take the standard deduction.

How much is self-employment tax?

Self-employment tax is 15.3% of net self-employment income: 12.4% for Social Security (up to the wage base of $168,600 in 2024) and 2.9% for Medicare (uncapped). You can deduct half of the self-employment tax when calculating your adjusted gross income.

Can I use this Tax Calculator on my own web page?

You can. Look for the "Embed" button near the top of this calculator. It lets you pick a size, border style, and color palette, then gives you an iframe tag to paste into any webpage. The widget is responsive, loads fast, and costs nothing. More details at calculory.com/services/embed-calculators.

Secure and Private

All calculations run locally. Your business data never leaves your browser.

Verified Precision

Precise Business Calculations Powered by Calculory AI