Free tools
Free tools for founders and online sellers
29 calculators, checkers and helpers for forming a US company, getting paid, selling online and staying compliant. Every one is free, needs no account, and shows where its numbers come from.
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Starting a US company
Structure, name, cost and paperwork.
Articles of Organization Guide
Field-by-field guide to Articles of Organization. Learn what each section means, what to fill in, and see state-specific requirements.
Open toolBusiness License Lookup
Whether your state requires a general business license, where to find city, county and trade licenses, and where to register for sales tax.
Open toolLLC Cost Calculator
Work out the real multi-year cost of running a US LLC, and whether a la carte compliance or a managed plan is cheaper for how you actually operate.
Open toolLLC vs C Corp vs DBA
Answer five questions to see whether a DBA, LLC or C corporation fits your business, with the reasons and a side-by-side comparison.
Open toolOperating Agreement Generator
Create a free, state-customized LLC operating agreement as a PDF, for single-member or multi-member LLCs.
Open toolRegistered Agent Comparison
Compare registered agent services side-by-side. Pricing, features, and what is included with StartGlobal, Northwest, Bizee, ZenBusiness, and LegalZoom.
Open toolStore and Brand Name Generator
Store and brand name ideas from your keywords, each linked to domain, trademark and state name checks.
Open toolTax and compliance
Forms, treaties, deadlines and sales tax.
Compliance Deadline Tracker
Track all your LLC compliance deadlines: annual reports, tax returns, estimated payments, and franchise taxes. Personalized by state and LLC type.
Open toolForm 5472 Deadline and Penalty
The Form 5472 and pro forma 1120 due date for a foreign-owned LLC, the extended date, and the penalty if a year was missed.
Open toolLLC Tax Estimator
Calculate federal, state, and franchise taxes for your US LLC. Get FDAP/ECI classification, treaty rates, and required tax forms.
Open toolS Corp Tax Savings Calculator
How much an S corp election saves your LLC in 2026: self-employment tax on profit compared with payroll tax on a reasonable salary.
Open toolSales Tax Nexus Checker
Which states you must collect sales tax in, from your sales and orders against each economic nexus threshold.
Open toolUS Tax Treaty Rates
Look up the US treaty withholding rate on dividends, interest and royalties for every treaty country, and calculate what a US payer will withhold.
Open toolW-8BEN Form Helper
Find out whether a US payer needs a W-8BEN, W-8BEN-E or W-9 from you, who signs it, what goes on every line, and the treaty withholding rate for your country.
Open toolGetting paid
Payment processors, transfers and US bank accounts.
Bank Account Checker
Check your eligibility for a US business bank account. Find the best bank based on your country, documents, and business needs.
Open toolPayoneer Fee Calculator
Payoneer receiving, card, withdrawal and annual fees on your monthly income, from client payment to your bank.
Open toolPayPal Fee Calculator
Work out what PayPal really costs on international payments, including the cross-border surcharge and conversion spread, and compare it against US card processing.
Open toolStripe Fee Calculator
Work out Stripe's fee on any payment, including the international card and currency conversion surcharges, ACH debits, and what to charge to receive a round number.
Open toolWise Fee Calculator
Wise fees on receiving US dollars and converting them to 30 currencies, from Wise's own pricing, compared against PayPal.
Open toolSelling online
Marketplace fees, advertising and importing.
Amazon ACoS and TACoS Calculator
ACoS, TACoS and ROAS from your Amazon ad spend and sales, with break-even ACoS.
Open toolAmazon FBA Calculator
Amazon referral fee, FBA fulfilment fee and selling plan on any product, with profit per unit and per month.
Open tooleBay Fee Calculator
Work out eBay's final value fee, per-order fee and international fee on any sale, and your profit after costs.
Open toolEtsy Fee Calculator
Etsy's listing, transaction, payment processing and Offsite Ads fees on your sale, with profit and margin.
Open toolShopify Fee Calculator
Shopify plan, card rate and third-party transaction fees on your orders, with profit per order and per month.
Open toolUS Import Duty Calculator
US import duty, additional tariffs, CBP processing and harbor fees, and landed cost per unit.
Open toolPricing and profit
Margin, markup, break-even and ad returns.
Break-Even Calculator
Units and revenue needed to cover your fixed costs, from price and variable cost per unit.
Open toolMarkup Calculator
Selling price from cost and markup, or the markup you are charging, with the matching margin.
Open toolProfit Margin Calculator
Profit margin from cost and price, or the price for a target margin, with markup alongside.
Open toolROAS Calculator
Return on ad spend, break-even ROAS from your margin, and profit after ad spend.
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Guides that go with the tools
Delaware vs Wyoming LLC
Side-by-side comparison with a decision quiz.
Best states for foreign founders
Choosing a state as a non-US resident.
ITIN application guide
How to get an ITIN as a non-US resident.
Non-resident banking guide
Opening a US bank account without an SSN.
LLC name checker
Check a name against a state's naming rules.
Form your US LLC for $399
All state fees included, with a registered agent. Then open a US business account and get paid in dollars.