Invoicing guides

Straight answers on UK invoicing rules, written for sole traders and small trade businesses.

• Self-Employed Invoicing Checklist UK (2026): What Every Invoice Must Include

  The complete sole trader checklist — what every invoice must legally include, VAT rules, payment terms, record-keeping and a worked example.

• What Must a UK Invoice Legally Include? (2026 Checklist)

  The full list of information HMRC expects on every invoice you send, plus the extra rules for sole traders, limited companies and VAT-registered businesses.

• Do I Need to Charge VAT as a UK Sole Trader? (2026 Rules)

  The £90,000 threshold, the two tests that trigger registration, and exact deadlines — explained with a worked example.

• Invoice Numbering Rules in the UK: Do They Have to Be Sequential? (2026)

  Do UK invoice numbers have to be sequential? The real HMRC rule for standard and VAT invoices, common numbering formats, and what to do about mistakes and gaps.