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 and bookkeeping costs, into a clear, plain-English answer in under a minute. No signup required.
Bookkeeping Cost Estimator
See the typical monthly fee for outsourced bookkeeping — plus what a catch-up cleanup would run.
Franchise Tax & Annual Report Lookup
Your state's annual fee, due date and late penalty — DE, WY, FL, CA, TX, NY and more.
S-Corp Election Deadline Checker
Form 2553's odd 2-months-15-days rule, checked against your formation date — with late-relief guidance.
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.
BOI Report Checker
See if your company must file a Beneficial Ownership (BOI) report and when it is due.
Sales Tax Rate Lookup
Look up the base state sales-tax rate for any US state and estimate tax on a sale.
1099 vs W-2 Cost
Compare the true cost of a contractor versus an employee, payroll taxes included.
Self-Employment Tax
Estimate the Social Security + Medicare tax you owe on freelance or business profit.
Late Penalty Estimator
Estimate IRS failure-to-file and failure-to-pay penalties plus interest on what you owe.
Burn Rate & Runway
Calculate your monthly burn and how many months of runway you have left.
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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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