VAT trips up a lot of new business owners, mostly because it sounds more complicated than it actually is. This guide covers the fundamentals every UK small business should understand.

This guide is a general introduction, not tax advice. VAT rules have real exceptions and edge cases - always confirm your specific situation with an accountant or HMRC directly, especially around registration thresholds and industry-specific rules.

What Is VAT?

VAT (Value Added Tax) is a tax added to the price of most goods and services sold in the UK. Businesses registered for VAT charge it on their sales, and can generally reclaim the VAT they've paid on their own business purchases.

If you're VAT registered and sell something for 100 pounds plus VAT at 20 percent, your customer pays 120 pounds. You keep the 100 pounds and pass the 20 pounds on to HMRC (minus any VAT you've paid on your own business expenses).

Current UK VAT Rates

  • Standard rate (20%) - applies to most goods and services
  • Reduced rate (5%) - applies to specific items like domestic energy
  • Zero rate (0%) - applies to specific items like most food and children's clothing

Rates can change, so always confirm the current figures with HMRC rather than relying on older sources.

Do You Need to Register for VAT?

In the UK, you must register for VAT once your taxable turnover goes over the current registration threshold within a 12-month period. You can also choose to register voluntarily before reaching that threshold, which some small businesses do for specific advantages - such as reclaiming VAT on business purchases.

The registration threshold changes periodically. Check the current figure on HMRC's website rather than relying on a number you saw somewhere else, since using an outdated threshold could mean registering late or unnecessarily.

Should You Register Voluntarily?

Reasons some small businesses register before they're required to:

  • You can reclaim VAT on business expenses and equipment
  • It can make your business appear more established to some clients, particularly other VAT-registered businesses

Reasons some businesses wait:

  • You have to add VAT to your prices, which can make you more expensive than non-registered competitors if selling to the general public
  • It adds administrative work - VAT returns, record keeping, and more detailed invoicing requirements

How to Calculate VAT

Adding VAT to a price: multiply the net (before-VAT) price by the VAT rate, then add it to the net price.

Removing VAT from a price: this is where people most often go wrong. If you have a VAT-inclusive price and want to find the original net amount, don't just subtract the percentage - divide the gross price by (1 + VAT rate) instead.

For a gross price of 120 pounds at 20% VAT, the net price is 120 divided by 1.20, which equals 100 pounds - not 120 minus 20%, which would incorrectly give you 96 pounds.

VAT on Invoices

If you're VAT registered, your invoices generally need to show your VAT registration number, the VAT rate applied, and the VAT amount separately from the net price - not just a single combined total.

Frequently Asked Questions

What happens if I don't register when I should?

Late registration can result in penalties from HMRC, and you may owe VAT backdated to when you should have registered. It's worth monitoring your turnover regularly rather than only checking once a year.

Can I deregister from VAT later?

Yes, generally if your turnover drops below the deregistration threshold, though there are specific rules and timing considerations - check with HMRC or an accountant.

Do I charge VAT on sales to customers outside the UK?

This depends on the type of goods or services and the customer's location - international VAT rules have specific exceptions. This is an area where getting advice from an accountant is particularly worthwhile.

Ready to put this into practice?

Use our free Invoice Generator — no signup required.

Open Invoice Generator →

Ready to put this into practice?

Use our free VAT Calculator — no signup required.

Open VAT Calculator →

Ready to put this into practice?

Use our free Profit Margin Calculator — no signup required.

Open Profit Margin Calculator →