Do I Need to Register for VAT? A Quick Guide for UK Businesses

The Short Answer

You must register for VAT if your VAT-taxable turnover exceeds £90,000 in any rolling 12-month period, or if you expect it to exceed £90,000 in the next 30 days alone. This is the compulsory registration threshold for 2025/26. You can register voluntarily at any time, even if your turnover is well below the threshold. Whether voluntary registration is a good idea depends on who your customers are and the nature of your business.

What Counts as VAT-Taxable Turnover?

Your VAT-taxable turnover includes the total value of everything you sell that is not VAT-exempt. This means standard-rated sales (20%), reduced-rate sales (5%), and zero-rated sales (0%) all count towards the threshold. Only VAT-exempt supplies (such as insurance, financial services, and certain health and education services) are excluded. Importantly, it is your gross income that counts, not your profit. A freelancer earning £95,000 but spending £40,000 on expenses still has a VAT-taxable turnover of £95,000 and must register.

The 12-month test is rolling — it is not based on your tax year or accounting year. At the end of every month, you should check whether your total taxable turnover in the preceding 12 months has exceeded £90,000. Use our VAT calculator to check the VAT implications on your pricing.

What Happens If I Go Over the Threshold?

If your taxable turnover exceeds £90,000 in any rolling 12-month period, you must notify HMRC within 30 days of the end of the month in which you crossed the threshold. Your VAT registration will then be effective from the first day of the second month after you exceeded the threshold. For example, if your rolling 12-month turnover crosses £90,000 at the end of July 2026, you must notify HMRC by 30 August 2026, and your registration will be effective from 1 September 2026.

Late registration is a common and costly mistake. HMRC will backdate your registration to when it should have taken effect, and you will owe VAT on all taxable sales made since that date — even if you did not charge VAT to your customers. This can mean a significant unexpected tax bill. For a detailed explanation of the registration process and its implications, read our comprehensive guide on when your business should register for VAT.

Should I Register Voluntarily?

Voluntary registration can be beneficial in several situations:

• Your customers are VAT-registered businesses: They can reclaim the VAT you charge, so it does not increase their costs. Meanwhile, you can reclaim VAT on your own purchases, reducing your costs.
• You have significant VAT-able expenses: If you buy equipment, stock, or services that include VAT, registering allows you to reclaim that VAT. This is particularly valuable in the early stages of a business when you are investing heavily.
• It enhances your professional image: Some businesses and clients perceive VAT-registered companies as more established and credible.

However, voluntary registration is not a good idea if your customers are mainly consumers (who cannot reclaim VAT) because it effectively increases your prices by 20%. It also adds an administrative burden — you must file quarterly VAT returns and maintain proper VAT records.

What About the Flat Rate Scheme?

The Flat Rate Scheme (FRS) is a simplified VAT scheme for small businesses with a taxable turnover of £150,000 or less (excluding VAT). Instead of calculating the actual VAT on each sale and purchase, you pay a fixed percentage of your gross turnover to HMRC. The percentage varies by industry — for example, management consultants pay 14%, while computer repair services pay 10.5%. The FRS can be simpler to administer and may save you money if your business has low VAT-able costs. However, under the FRS you cannot reclaim VAT on most purchases (with a few exceptions for capital goods over £2,000), so it is not suitable for every business.

Can I Deregister for VAT?

Yes. If your taxable turnover falls below £88,000 (the deregistration threshold for 2025/26), you can apply to deregister. This can be beneficial if your turnover has dropped and VAT registration is no longer advantageous. However, think carefully before deregistering — if your turnover is close to the threshold, you may find yourself needing to re-register soon, and the process of changing your pricing and invoicing twice is disruptive.

Common Questions

Q: Do I need to register if I only sell zero-rated goods?
A: Yes, zero-rated sales still count towards the £90,000 threshold. However, if all your sales are zero-rated, you will typically receive VAT refunds (since you charge 0% output VAT but can reclaim input VAT on your purchases), so registration is usually beneficial.

Q: I sell on eBay/Etsy/Amazon — do I need to register?
A: If your total taxable sales across all platforms and channels exceed £90,000 in a rolling 12-month period, yes. Online marketplace sales are no different from any other sales for VAT purposes.

Q: What if I have multiple businesses?
A: If you are a sole trader running multiple businesses, your combined turnover from all businesses counts towards the threshold. If each business is a separate limited company, each company is assessed independently.

Next Steps

If you are approaching the VAT threshold or considering voluntary registration, getting professional advice early can save you time, money, and stress. Timing your registration correctly, choosing the right VAT scheme, and setting up your accounting software properly from the start will make ongoing compliance much smoother. Our VAT services team handles everything from initial registration to quarterly returns and scheme selection. Contact us for a free consultation to discuss your specific situation.