Free tax tools & calculators.
Plan ahead with simple, free calculators built by our CPA & EA team, no signup, plain-English answers.
Plan ahead with free calculators built by our CPA & EA team. Each one turns a confusing US tax question, quarterly payments, S-corp savings, sales-tax nexus, formation costs, into a clear, plain-English answer in under a minute. No signup required.
Quarterly Tax Estimator
Estimate your federal quarterly (1040-ES) payments so you never get hit with an underpayment penalty.
S-Corp Savings Calculator
See how much self-employment tax an S-corp election could save you at your income level, before you file Form 2553.
Sales-Tax Nexus Checker
Find out which US states you've triggered sales-tax nexus in based on where you sell, ship and store inventory.
LLC Cost Estimator
Compare formation and annual costs across Delaware, Wyoming and other popular states for your US LLC.
Form 5472 Requirement Checker
Answer a few questions to learn whether your foreign-owned LLC must file Form 5472, and the penalty if you don't.
Tax Treaty Lookup
Check whether your country has a US tax treaty that reduces withholding on your US-source income.
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Every calculator here is a planning estimate. Your exact figures depend on your entity, state and income, which is precisely what a licensed CPA or EA reviews. Get a free quote and we'll run your real numbers and walk you through what they mean.
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