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U.S. tax planning tools

US Tax Calculator

Estimate federal, state, payroll, investment, retirement, and small-business tax outcomes from the amounts and assumptions you enter.

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Browse by tax topic

Choose a subject to see the calculators available for that part of your tax picture.

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10 toolsBusiness & Employer TaxExplore 12 toolsCredits & DeductionsExplore 10 toolsFederal Income & FilingExplore 12 toolsInvestments & Capital GainsExplore 8 toolsPaycheck & WithholdingExplore 10 toolsReal Estate & Rental PropertyExplore 12 toolsRetirement, Pension & HealthExplore 10 toolsSelf-Employed & Gig IncomeExplore 6 toolsSpecialty & International TaxExplore 10 toolsState, Local & Transactional TaxExplore

Common starting points

Popular calculators

Start with a common U.S. tax question, then review the inputs, assumptions, formulas, and limits shown by the tool.

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Financial quick reference

Tax dates and payment calendar

Use the official IRS pages below for current filing, payment, extension, and refund guidance. The dates and rules are maintained by the IRS rather than hardcoded here.

When to fileConfirm the current federal filing deadline and the situations that change when a return is due.Open IRS resourcePublication 509 tax calendarsUse the IRS tax calendars for filing, payment, and other recurring federal tax dates.Open IRS resourceEstimated taxesReview who may need estimated payments and how the IRS explains the planning process.Open IRS resourceForm 1040-ESOpen the current form and instructions used to plan individual estimated tax payments.Open IRS resourceTax extension and payment guidanceCheck how an extension affects filing time and where to confirm payment guidance from the IRS.Open IRS resourceRefund timingReview the IRS refund guidance before using an estimate to plan around a potential payment.Open IRS resource

Public reference

Common IRS resources

Use these official resources to confirm forms, withholding guidance, refund status, and other filing details before relying on an estimate.

Tax Withholding EstimatorReview federal withholding and W-4 planning guidance from the IRS.Open IRS resourceForms and instructionsFind current forms, instructions, publications, and prior-year materials.Open IRS resourceWhere's My Refund?Check the status of a filed federal income tax refund using the official IRS service.Open IRS resourceIRS tools and calculatorsBrowse official IRS tools for payments, credits, deductions, and taxpayer assistance.Open IRS resource

Reference library

Popular guides

Published guides explain the assumptions, inputs, and result interpretation behind common tax questions.

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Lookup resources

Reference tables

Check the tax year, jurisdiction, units, and source edition before using a reference table with a calculator.

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Search-led help

Frequently asked questions

Use the question that matches your situation, then open the calculator or guide that fits the facts you need to check.

Which calculator should I start with?

Start with the tax question you need to estimate. Use the calculator directory to compare the available federal, payroll, investment, retirement, property, business, state, and local tools. Browse all calculators

How do paycheck and W-4 questions differ?

A paycheck estimate focuses on take-home pay and payroll deductions; a W-4 estimate focuses on withholding across the year. Use the tool whose inputs match the decision you are checking. Paycheck take-home calculator W-4 withholding estimator

What should I check before estimating capital gains?

Confirm proceeds, adjusted basis, selling costs, holding period, and any loss or rate assumptions before relying on the estimate. Capital gains tax calculator Cost basis and gain/loss calculator

When do I need a state or local tax calculator?

Use a state or local tool when residency, work location, local rules, or a transaction jurisdiction changes the tax question. Federal results should not be treated as a state or city result. State income tax calculator Local income tax calculator

Are these results tax filing advice?

No. Results are planning estimates based on the values and assumptions entered. Verify the tax year, jurisdiction, filing facts, source records, and current IRS or state guidance before filing or relying on an estimate. Read how estimates work Read the disclosure

Where do guides and reference tables fit?

Guides explain inputs, assumptions, and result interpretation. Reference tables help you prepare a tax-year or jurisdiction-specific lookup before using a calculator. Browse published guides