In the UK, a VAT invoice is an official document issued by a business when it sells goods or services subject to value-added tax (VAT). Mandated by regulation 13 of the VAT Regulations 1995, a VAT invoice records the transaction and breaks down the VAT charged. For businesses, a VAT invoice is proof of the VAT they’ve charged to customers. For buyers, it’s proof of the VAT they’ve paid, and it can be used to reclaim VAT from their local tax authority. Without it, both parties could face HMRC penalties or lose the ability to reclaim VAT.

Below, we’ll explain what information must be included on a VAT invoice in the United Kingdom, how to calculate and display VAT on invoices, and what happens if VAT invoices are incorrect.

What’s in this article?

• Who needs to issue a VAT invoice in the UK?
  
• What must be included on a VAT invoice in the UK?
  
• What are the types of VAT invoices?
  
• How do you calculate and display VAT on invoices?
  
• How to show VAT on the invoice
  
• What are the rules for invoicing VAT-exempt or zero-rated sales?
  
• What happens if VAT invoices are incorrect?
  
• How Stripe Invoicing can help
  

Who needs to issue a VAT invoice in the UK?

A VAT invoice is an official commercial document that records a sale, itemizes the applicable tax rate, and details the exact VAT charged. In the UK, you are legally required—and permitted—to issue a VAT invoice only if your business is VAT-registered with HMRC.

This includes businesses that have crossed the mandatory UK VAT threshold of £90,000 in rolling 12-month taxable turnover, as well as those operating under voluntary registration.

Your invoicing obligations depend primarily on who you are selling to:

• B2B Transactions (Business-to-Business): When selling taxable goods or services to another VAT-registered business, you must issue a valid VAT invoice within 30 days of the supply (or payment date) so your buyer can reclaim the input tax.
   
  
• B2C Transactions (Business-to-Consumer): When selling directly to end-consumers who cannot reclaim VAT, you are generally not required to provide a full VAT invoice unless the customer explicitly requests one.
  

Additionally, if you trade internationally or bill cross-border clients, UK law allows you to issue invoices in any currency (such as USD or EUR). However, if the supply takes place within the UK and is subject to UK VAT, the total VAT amount payable must still be clearly shown in GBP (£) on the invoice. You can convert the VAT amount using HMRC’s official monthly exchange rates, the live market rate at the time of supply, or a published ECB rate, provided the chosen method is used consistently.

What must be included on a VAT invoice in the UK?

To meet legal requirements, a VAT invoice in the UK must include specific details, such as:

• A unique invoice number

• The date of issue

• The tax point (the date the VAT becomes due, if different from the invoice date)

• The date of supply (if different from the issue date)

• The supplier’s business name, address, contact information, and VAT registration number 

• The customer’s name or trading name and address

• A description of the goods or services supplied

• The quantity of goods or the scope of services provided

• The subtotal, excluding VAT

• The VAT rate applied (e.g., 20%, 5%, 0%)

• The amount of VAT charged

• The total amount, including VAT

Simplified invoices (e.g., for amounts £250 or less) require fewer details, but you must still include the VAT rate and total amount due.

What are the types of VAT invoices?

Three main types of VAT invoices are used in the UK, each suited to different transaction types and total amounts. 

• Full VAT invoices: These are used for most transactions between VAT-registered businesses and must include all required details. 

• Simplified VAT invoices: These are used for transactions totaling £250 or less (including VAT), if the invoice does not include any exempt supplies. Simplified invoices can contain fewer details, typically the date of supply, a description of goods or services, the VAT rate, the VAT-inclusive price, and the supplier’s name, address, and VAT number.

• Modified VAT invoices: These are used for retail sales over £250 where the goods are subject to VAT, and they must include all required details.

How do you calculate and display VAT on invoices?

Assume that you’re selling a product for £100 and VAT is 20%. First, divide the VAT rate by 100. Then, multiply that number by the total amount due before VAT to get the amount of VAT due.

£100 x 0.2 = £20

Add the VAT to the subtotal to get the total price the customer owes.

£100 + £20 = £120

If you already know the VAT-inclusive price and need to work backward, divide the total by the VAT rate, plus one.

£120 ÷ 1.2 = £100
£120 - £100 = £20

If different items on the invoice have different VAT rates, follow these steps for each product or service individually, and add everything up at the end to get the final total.

How to show VAT on the invoice

Your invoice should include the following details in a clean, easy-to-read format:

• The subtotal for each item or service (what they cost before VAT)

• The VAT rate you’ve applied (e.g., 20%, 5%, or 0% if it’s exempt)

• The total VAT amount for the entire invoice

• The final total (what the customer owes, including VAT)

What are the rules for invoicing VAT-exempt or zero-rated sales?

A VAT invoice isn’t necessary if everything sold is zero-rated or exempt from VAT. Here’s what each of these terms means:

• Zero-rated sales: VAT is charged at 0%. The goods or services are taxable, but no VAT is added. Examples include basic food items, books, and children’s clothing.

• VAT-exempt sales: The goods or services are outside the scope of VAT. No VAT is charged or reclaimed. Examples include financial services, education, and medical treatments.

When you invoice VAT-exempt or zero-rated sales, the rules are slightly different from those for standard VAT sales. These invoices should still include the invoice date, unique invoice number, the customer’s details, and the business’s name, address, and VAT registration number. They should also include a subtotal and final price.

The invoice should state that the sale is zero-rated or exempt: “zero-rated supply” for zero-rated sales and “exempt supply” for VAT-exempt sales. In the VAT column for zero-rated sales, state “0% VAT.” Do not include a VAT column for exempt sales.

Even though these sales don’t involve VAT, proper invoicing is important for compliance during audits. It provides a record that differentiates between zero-rated and exempt sales, which have different implications for VAT returns. These invoices also provide a helpful record for customers.

What happens if VAT invoices are incorrect?

If your VAT invoice is incorrect, it can cause problems for you and your customer. On the business side, His Majesty’s Revenue and Customs (HMRC)—the UK tax authority—could see invoice errors as noncompliance and issue fines, conduct audits, or delay processing your VAT return. On the customer side, incorrect invoices mean customers might not be able to reclaim VAT on their purchases.

Here are some common mistakes to avoid on VAT invoices:

• Charging the wrong VAT rate

• Forgetting invoice details, such as your VAT registration number and the invoice date

• Mislabeling items as zero-rated or exempt

• Miscalculating the VAT amount or totals

• Not keeping VAT invoices on record for at least 6 years

• Not submitting the VAT invoice within 30 days of the date of supply

If you discover errors in your VAT invoices, don’t edit the original invoice (HMRC does not permit this). Instead, issue a credit note to cancel the incorrect invoice, identifying the canceled invoice by its invoice number. Then, create a new, correct invoice. Communicate with your customer about the error and explain what you’re doing to resolve it. If the error has already gone into your VAT return, you might need to amend your filing or adjust your next return.

For registered businesses, persistent errors or failure to take reasonable care when issuing invoices can trigger substantial financial penalties under HMRC’s compliance check framework (Schedule 24). Penalties are calculated as a percentage of the potential lost revenue: 

• Careless errors: 15% to 30% of the lost tax liability

• Deliberate inaccuracies: 20% to 70% of the lost tax liability

• Deliberately concealed inaccuracies: 30% to 100% of the lost tax liability, plus statutory interest and potential public naming under HMRC non-compliance rules

To avoid future errors, double-check all invoices for accuracy and completeness before they’re sent, and take the time to understand how different VAT rates apply to your business’s offerings. Additionally, consider investing in accounting software that can automate calculations to ensure mathematical accuracy. As of 2026, VAT-registered businesses must use Making Tax Digital-compliant accounting software, and e-invoicing will be mandatory for all VAT-registered businesses from April 2029.

How Stripe Invoicing can help

Stripe Invoicing simplifies your accounts receivable (AR) process—from invoice creation to payment collection. Whether you’re managing one-time or recurring billing, Stripe helps businesses get paid faster and streamline operations:

• Automate accounts receivable: Easily create, customize, and send professional invoices—no coding required. Stripe automatically tracks invoice status, sends payment reminders, and processes refunds, helping you stay on top of your cash flow.

• Accelerate cash flow: Reduce days sales outstanding (DSO) and get paid faster with integrated global payments, automatic reminders, and AI-powered dunning tools that help you recover more revenue.

• Enhance the customer experience: Deliver a modern payment experience with support for 25+ languages, 135+ currencies, and 100+ payment methods. Invoices are easy to access and pay through a self-serve customer portal.

• Reduce back-office workload: Generate invoices in minutes and reduce time spent on collections through automatic reminders and a Stripe-hosted invoice payment page.

• Integrate with your existing systems: Stripe Invoicing integrates with popular accounting and enterprise resource planning (ERP) software, helping you keep systems in sync and reduce manual data entry.

Learn more about how Stripe can simplify your accounts receivable process, or get started today.