The Main Difference

A standard invoice records what a customer owes. A VAT invoice does that too, but also shows VAT information required for tax records. If you are not VAT registered, your invoice should be a standard invoice and should not charge VAT.

What Goes on a Standard Invoice

• Your business name and address

• Client name and address

• Unique invoice number

• Invoice date

• Description of goods or services

• Amount due and payment terms

What Goes on a VAT Invoice

A VAT invoice includes all the standard invoice details plus VAT-specific information: your VAT registration number, the tax point where relevant, VAT rate, amount before VAT, VAT charged, and total including VAT.

When to Use Each One

Use a standard invoice when you are not VAT registered or when VAT does not apply. Use a VAT invoice when you are VAT registered and making a taxable supply that requires one. Some lower-value transactions may use simplified VAT invoices, but the core idea is the same: the VAT details must be clear.

Common Mistakes

• Adding VAT when you are not VAT registered.

• Forgetting your VAT registration number.

• Showing a total without separating VAT.

• Using inconsistent invoice numbers.

Practical Tip

Create two clean invoice setups: one standard and one VAT-ready. That way you are not editing old invoices by hand every time a client, rate, or job type changes.