UK Freelancers: A Complete Guide to VAT, Invoicing & Tax (2026)

If you're freelancing in the UK, you have a unique set of rules to follow — especially when it comes to VAT and invoicing. HMRC doesn't mess around with paperwork, but you also don't need an accounting degree to get it right.

Here's the plain-English guide.

When Do You Need to Register for VAT?

The short answer: when your VAT-taxable turnover hits the threshold.

For 2026:

• Registration threshold: £90,000 in any rolling 12-month period
• Deregistration threshold: £88,000
• Standard rate of VAT: 20%
• Reduced rate: 5% (e.g. home energy)
• Zero-rated: 0% (e.g. most food, books, children's clothes — still counts as taxable turnover, though!)

Voluntary registration can sometimes be a smart move even below the threshold — especially if you sell to other VAT-registered businesses (they can reclaim the VAT you charge, so it doesn't cost them anything, and you can reclaim VAT on your expenses).

What Must Go on a UK VAT Invoice?

HMRC requires specific information on VAT invoices. If you're registered for VAT, every invoice you issue must include:

1. A unique invoice number (sequential)
2. Your business name, address, and VAT registration number
3. Your client's name and address
4. Issue date and tax point (if different)
5. Due date for payment
6. Description of goods/services for each line item
7. Total amount excluding VAT
8. Total amount of VAT (in GBP)
9. Rate of VAT charged per item (20%, 5%, 0%, or exempt)
10. The total amount including VAT

If you're not VAT-registered, you cannot charge VAT or show a VAT number on your invoices.

Non-VAT Invoices (Simplified)

If you're below the threshold, your invoices just need:

• Your name/business name
• Client name
• Unique invoice number
• Issue date
• Clear description of services
• Total amount due
• Payment terms and instructions

That's it. No VAT number, no breakdown.

What is Making Tax Digital for Income Tax (MTD for ITSA)?

From April 2026, all self-employed people and landlords earning over £50,000 must use MTD-compatible software to submit quarterly updates to HMRC. Those earning £30,000–£50,000 follow in April 2027.

What this means in practice:

• You'll need digital records of all income and expenses
• Quarterly summaries submitted via MTD-compatible software
• A final declaration (replacing the Self Assessment return)

Freelio helps you keep clean digital records of all your invoices — essential for MTD compliance.

Payment Terms: What's Standard in the UK?

There's no legal requirement in the UK for specific payment terms, but these are conventional:

• Immediate payment / due on receipt: Common for deposits
• 7 days: Aggressive but fine for new clients
• 14 days: Common for ongoing client relationships
• 30 days: Standard for larger companies and public sector

Under the Late Payment of Commercial Debts (Interest) Act 1998, you're entitled to charge statutory interest of 8% above the Bank of England base rate on late payments plus a fixed compensation fee (£40-£100 depending on invoice size). You don't have to enforce it, but having it in your contract is a good deterrent.

IR35: Do You Need to Worry?

IR35 (off-payroll working) only applies if you're working through an intermediary (usually a limited company) and the engagement is effectively employment. For sole traders operating as themselves, IR35 doesn't directly apply — but you should still ensure your contracts reflect genuine self-employment:

• Right of substitution (can you send someone else to do the work?)
• Control over how, when, and where you work
• Financial risk (do you bear costs if something goes wrong?)
• Mutuality of obligation (is there an expectation of ongoing work?)

Using a clear, professional contract is your best defense. Our freelance contract generator includes independent contractor language by default.

Governing Law: Which UK Jurisdiction?

English law is the default, but you should specify one of:

• England and Wales (most common)
• Scotland (different legal system)
• Northern Ireland

Pick the one where you're based and do most of your work.

Quick Checklist

✅ Register for VAT when you hit £90k in 12 months
✅ Use sequential invoice numbers
✅ Include your VAT number on all invoices if registered
✅ Keep digital records for MTD
✅ Specify payment terms and include late-fee language
✅ Use proper contracts that reflect self-employment
✅ Issue invoices promptly and follow up on late payments

Want to generate a UK VAT-compliant invoice in 60 seconds? Try Freelio's invoice generator — pre-configured for GBP and 20% VAT, downloadable as PDF.