Klamic invoicing guides

Practical UK invoicing help, without the accounting-software jargon.

Use these guides when you need a clear answer about creating, sending or keeping an invoice. They are written around the real decisions freelancers, sole traders and small service businesses run into, with official UK guidance linked where it matters.

Content is reviewed against current UK guidance. Latest library review: 17 August 2026.

Getting invoices right

3 guides

UK invoice checklistThe core information a normal UK business invoice should show before you send it.Invoice numberingA practical approach to unique, consistent invoice numbers without making the system complicated.Invoice payment termsHow due dates and clear payment instructions help customers understand exactly when and how to pay.

Business type & tax

2 guides

Sole trader invoicesHow to use a trading name while still showing the individual details a UK sole-trader invoice needs.VAT invoicesThe additional information VAT-registered businesses need to show on ordinary VAT invoices.

Records & admin

1 guides

Keeping invoice recordsWhy sales invoices matter as business records and how long self-employed records generally need to be retained.

Put it into practice

Create the invoice now — or let Klamic remember the repetitive parts.

The free UK invoice generator works without an account. If invoicing is a regular job, Klamic saves your business details, customers and common services and keeps your invoice history together.

Create a free invoice Get Klamic