Basics
What Is an Invoice? A Plain English Explanation
What an invoice is, what it is used for, the types you will actually meet, and the country rules that decide what goes on it.
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Basics
Invoice vs Receipt — Key Differences Explained
When to send each, why you need both, and the legal rules that decide what goes on them in the US, UK, Canada, and Australia.
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Basics
How to Write an Invoice (Step by Step)
What to include, what order to put it in, and the tax rules for the US, UK, Canada, and Australia — so you get paid on time.
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Basics
How to Invoice a Client — Complete Guide for Freelancers
What to gather before you bill, payment terms that actually work, international invoicing, and how to chase unpaid invoices.
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Basics
Invoice Payment Terms Explained — Net 30, Net 15, and More
Net 30 vs net 15 vs due on receipt, what is normal in your industry and country, and how to actually get paid on time.
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Tax
UK VAT Invoice Requirements 2026 — What Must Be Included
What must be on every UK VAT invoice, who must issue one, when simplified invoices work, and the mistakes that get HMRC letters.
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