VAT registration is compulsory once your taxable turnover passes £90,000, but you can register earlier by choice. Voluntary registration lets you reclaim VAT on business costs and can make you look more established to VAT-registered customers. The price is that you must charge VAT on your sales and file returns. It usually pays off when you sell mostly to other businesses or buy a lot of VAT-bearing equipment, and it rarely helps if your customers are mainly the public.
- The current VAT registration threshold is £90,000 over any rolling 12 months, and the deregistration threshold is £88,000.
- You can register voluntarily at any turnover, provided you make or intend to make taxable supplies.
- Registering lets you reclaim input VAT, including on some purchases made before you registered.
- Once registered, you must charge VAT, keep digital records and file returns, whether or not you wanted the extra admin.
- The Flat Rate Scheme can simplify returns, but the 16.5% limited cost rate removes the benefit for many service businesses.
- If you pass the threshold, you have 30 days to register, so a voluntary decision made early gives you control over timing.
What VAT Registration Means for a Small Business
VAT registration is the process of telling HMRC that your business will charge, collect and account for Value Added Tax. After approval, you receive a VAT registration number, you add the standard rate of 20% to most sales, and you send HMRC a return, usually every quarter, showing what you collected and what you paid on purchases.
For most small business owners, the question is not how VAT works but when it starts. That date is set by the VAT threshold.
The current VAT threshold
You must register when your taxable turnover goes over £90,000 in any rolling 12-month period, or when you expect it to pass that figure in the next 30 days alone. The figure has stood at £90,000 since April 2024 and is unchanged for 2026/27. If your turnover later falls, you can ask to deregister once it is below £88,000.
Taxable turnover is the value of everything you sell that is subject to VAT, including zero-rated sales, but not exempt sales or sales outside the scope of VAT. Importantly, the test looks at the last 12 months at the end of every month. It is not a tax year or a calendar year.
Threshold | Amount (2026/27) |
Compulsory registration | £90,000 |
Deregistration | £88,000 |
Join the Flat Rate Scheme (expected turnover, excluding VAT) | £150,000 or less |
Must leave the Flat Rate Scheme (turnover including VAT) | £230,000 |
Because the threshold applies per business and not per product line, a sole trader with several income streams has to add the taxable ones together.
What Is Voluntary Registration, and Who Is It For?
Voluntary registration means applying to HMRC for VAT registration before your turnover forces you to. There is no minimum turnover. What HMRC looks for is that you make, or genuinely intend to make, taxable supplies. From the date you are registered, every rule that applies to a compulsory registrant applies to you as well.
Businesses that often benefit
- B2B suppliers. If most of your customers are VAT-registered, they can reclaim the VAT you charge, so the 20% costs them nothing in the end. Your prices stay competitive while you recover VAT on your own costs.
- Start-ups with large set-up costs. A new business buying equipment, fit-out, stock or software pays VAT on those purchases. Registering early lets you claim it back instead of absorbing it.
- Businesses selling zero-rated goods or services. Zero-rated sales are still taxable supplies. You charge 0% but can still reclaim input VAT, which can produce regular repayments.
- Growing businesses close to the threshold. If you know you will pass £90,000 within the year, registering on your own timetable lets you build VAT into your prices and systems gradually instead of in a rush.
- Firms wanting credibility. Some larger customers and suppliers prefer to deal with a VAT-registered business and ask for a VAT number on invoices.
Businesses that often do not
- Consumer-facing businesses. If you sell mainly to the public, who cannot reclaim VAT, you either raise prices by up to 20% or absorb the tax from your margin.
- Businesses with mainly exempt income. If your sales are exempt from VAT, such as certain education, health or financial services, you generally cannot register voluntarily because you make no taxable supplies, and you could not reclaim input VAT anyway.
- Very small operations with few purchases. When your reclaimable VAT is only a few hundred pounds a year, the admin may outweigh the saving.
Benefits and Drawbacks of Voluntary VAT Registration
The decision comes down to who pays the VAT you charge and how much VAT you pay on your own costs.
Factor | In favour of registering | Against registering |
Input VAT | You reclaim VAT on equipment, stock, software and services | Nothing to reclaim if your costs carry little VAT |
Pricing | B2B customers recover the VAT, so your prices are not affected | Consumers pay up to 20% more, or you cut your margin |
Admin | Digital records may improve your bookkeeping | Returns, deadlines and Making Tax Digital software are now required |
Cash flow | Regular repayments if you are a net reclaimer | You hold VAT owed to HMRC and must have the cash when it is due |
Credibility | A VAT number on invoices reassures larger clients | Registration is visible to customers, and you cannot easily undo the impression |
Risk | Controlled start date and a smoother path past the threshold | Penalties for late returns, late payment and errors apply from day one |
A simple illustration
Imagine a new design studio buys £15,000 of equipment plus £3,000 VAT. If it is not registered, the £3,000 is a cost it cannot recover. If it registers voluntarily and sells to VAT-registered clients, it reclaims the £3,000 on its first return and charges clients 20% VAT that they, in turn, reclaim. The studio’s net position improves by £3,000 with no real change in what clients pay.
Reverse the example for a hairdresser who sells to the public and buys very little. Registering means charging £20 VAT on every £100 of services, with almost nothing to set against it. The business either loses margin or loses customers.
Pre-registration VAT
Voluntary registration also opens the door to reclaiming some VAT on costs you incurred before you registered. In general, you can claim VAT on goods you still hold, for up to four years before your registration date, and on services for up to six months. The purchases must relate to your business and be backed by valid invoices, so gather them before you apply.
Voluntary vs Compulsory Registration: Deadlines and Start Dates
The practical difference is control. With voluntary registration you choose when to start. With compulsory registration, HMRC’s rules choose for you, and missing the VAT registration deadline is expensive.
|
Voluntary |
Compulsory (backward-looking test) |
Compulsory (30-day forward test) |
|
|
Trigger |
Your decision, at any turnover |
Taxable turnover over £90,000 in the last 12 months |
You expect to pass £90,000 in the next 30 days alone |
|
Deadline to apply |
None |
Within 30 days of the end of the month you went over |
By the end of 30 days from when you realised |
|
Start date |
Date you request, or one agreed with HMRC |
First day of the second month after you exceeded |
The date you realised, not the date you crossed |
A worked example of the deadline
Suppose your 12-month taxable turnover goes over £90,000 on 15 July. The month ends on 31 July, so you must apply by 30 August, and your registration takes effect from 1 September. From that date you must charge VAT, even if the application is still being processed.
What happens if you register late
If you register late, you owe the VAT you should have charged from your effective date, even on sales you have already invoiced without VAT. Many businesses cannot recover that from customers, so it comes out of profit. HMRC may also charge a penalty for failing to notify on time, calculated as a percentage of the VAT due, with the rate depending on how late you are and whether HMRC considers the failure careless or deliberate.
Why timing is a reason to act early
Because the turnover test is rolling, a business can cross the line without a single big sale. A few strong months can do it. Checking your 12-month total at the end of every month is the simplest safeguard. If you are consistently above £70,000 and growing, a deliberate voluntary registration on a date that suits your cash flow is usually safer than waiting.
How to Complete HMRC VAT Registration
Most businesses complete HMRC VAT registration online. The process is straightforward when your paperwork is ready.
- Create or find your Government Gateway account. Limited companies need a business account linked to the company, and you will need your company registration number.
- Gather your details. Typically that means your business name and address, your UTR or company number, bank details, a description of what you sell, and your estimated taxable turnover for the next 12 months.
- Choose your effective date. For voluntary registration you can usually pick the start date, which matters for pre-registration VAT claims.
- Choose your VAT scheme. Standard accounting is the default. You can ask to join the Flat Rate Scheme, cash accounting or annual accounting at the same time.
- Submit and wait. Processing commonly takes a few weeks, and online applications that stall may be saved and returned to later.
Your VAT registration number
Once HMRC approves the application, it issues a VAT registration number and a certificate showing your effective date. Quote the number on every VAT invoice. Keep the certificate, because suppliers, banks and online marketplaces may ask for it.
Standard rate VAT and how it works after registration
Most goods and services are subject to standard rate VAT of 20%. Some items are charged at 5% or 0%, and some are exempt. After registering you add the right rate to each sale, record every transaction digitally, and file returns through Making Tax Digital compatible software. The filing and payment deadline is normally one calendar month and seven days after the end of each period.
Should you use the Flat Rate Scheme?
The Flat Rate Scheme is an optional way to calculate your VAT bill. You still charge customers 20%, but you pay HMRC a fixed percentage of your VAT-inclusive turnover, set by your trade sector, and you generally cannot reclaim input VAT on purchases. Key points:
- You can join if you expect taxable turnover of £150,000 or less, excluding VAT, in the next 12 months.
- New VAT registrants get a 1% discount on their flat rate for the first year.
- If your spending on relevant goods is under 2% of your VAT-inclusive turnover, or under £1,000 a year, you are a limited cost business and must use 16.5%.
- You must leave the scheme if your turnover reaches £230,000.
The scheme suits businesses with few purchases and a low sector rate. It tends to work badly for firms with heavy equipment costs, which is often the very reason people register voluntarily. Compare both methods using real figures before choosing.
Conclusion
Voluntary VAT registration is a commercial decision, not a compliance chore. If your customers can reclaim VAT and you have meaningful costs to recover, registering early often improves your cash flow and credibility. If you sell mainly to individuals, the 20% added to your prices can outweigh any savings. Work through your own numbers: expected sales by customer type, VAT on your purchases, and the admin time returns will take. Then choose a start date and, if relevant, a scheme that fits. If you are unsure, a short conversation with an accountant before applying is cheaper than correcting a poor choice afterwards.
Frequently Asked Questions
Yes. Any business that makes or intends to make taxable supplies can register voluntarily, whatever its turnover. You must pay HMRC any VAT you owe from the date they register you.
It depends on your customers and costs. A sole trader selling to VAT-registered businesses or buying significant equipment often gains. One serving the public with few purchases usually loses money or margin.
Yes. You can apply to deregister if you expect your taxable turnover to stay below the £88,000 deregistration threshold. Review the effect on any assets you still hold, because VAT can be due on them.
Yes. You may only charge VAT once you are registered. Charging it earlier, or without a valid VAT number on your invoice, creates problems for you and your customer.
Online applications often take a few weeks, and busy periods can stretch that. Apply well before the date you want to start charging VAT.
