Guides & Articles
No sign-up Plain-English explanations Written for freelancers
A collection of tax calculator guides for freelancers and small businesses billing across the UK, Australia, Canada, and the USA.
These tax calculator guides exist for one reason. Our calculators give you a fast number. These guides explain the “why” behind that number. Together, they cover the real situations freelancers and small business owners actually run into.
Each guide is short and practical. We avoid dense legal language wherever we can. Instead, we use plain examples with real amounts, so you can see exactly how a rule plays out on an actual invoice.
Some guides compare tax systems side by side, like VAT versus GST versus sales tax. Others walk through a single common mistake, like forgetting to charge VAT, and show you how to fix it. A few answer one specific question directly, like which US states skip sales tax entirely. For the official source behind any rule mentioned here, we link out to the relevant tax authority, such as the UK’s official tax guidance from gov.uk.
Browse our tax calculator guides
Guides are grouped below by type, so you can jump straight to comparisons, freelancer guides, common mistakes, or quick answers, depending on what you actually need right now.