# VAT registration threshold: when does a UK business have to register? > The UK VAT registration threshold is £90,000, but it is tested on a rolling 12-month basis and there is also a forward-looking 30-day test. Canonical: https://yestax.co.uk/tax-help/vat-registration-threshold-when-to-register Last updated: 2026-09-03 Published: 2026-09-03 Author: YesTax Editorial Team A UK business normally needs to register for VAT when its **VAT-taxable turnover goes over £90,000**, but the threshold is not tested only at your year end. The main historic test looks at the previous **12 months on a rolling basis**. There is also a separate forward-looking test where you expect taxable turnover to exceed £90,000 in the next 30 days alone. ## The rolling 12-month test For the backward-looking test, monitor taxable turnover at the end of each month. You are not asking: > Did my last set of accounts show more than £90,000 turnover? You are asking: > What was my VAT-taxable turnover in the 12 months ending now? A fast-growing business can therefore cross the registration threshold in the middle of an accounting period. ## What counts toward the threshold? The threshold is based on **taxable turnover**, not simply every pound that enters the bank account. Broadly, taxable turnover includes supplies that would be subject to VAT at the standard, reduced or zero rate if the business were VAT registered. Some receipts may be outside the scope or exempt and need different treatment. This distinction is particularly important for businesses with mixed activities, property income, finance, education, health or international supplies. ## The 30-day forward-looking test HMRC also requires registration if you expect your taxable turnover to go over £90,000 in the **next 30 days alone**. This catches cases where a business wins a large contract or has another event that will push expected taxable supplies above the threshold immediately, even though the previous 12 months were below £90,000. The registration timing rules differ between the historic and future tests, so identify which test was triggered rather than treating them as interchangeable. ## Example: steady growth Suppose a business has monthly taxable sales of around £7,000 for most of the year, then sales rise to £10,000 per month. Its annual accounts may still show turnover below £90,000 for the last completed financial year, while the rolling 12-month total later crosses £90,000. That is why annual accounts alone are a poor monitoring system for VAT registration. ## Overseas businesses can have different rules HMRC states that certain businesses based outside the UK that make taxable supplies in the UK may need to register **regardless of the £90,000 threshold**. Whether a supply is actually made in the UK can depend on place-of-supply rules, so do not assume an overseas company is either automatically outside UK VAT or automatically required to register merely because it has UK customers. ## Voluntary VAT registration A business can choose to register below the compulsory threshold. That can sometimes be attractive where: - most customers are VAT-registered businesses able to recover VAT; - the business has significant input VAT on costs or investment; - registration supports commercial credibility in a particular market. It can be unattractive where customers are consumers or VAT-exempt organisations who cannot recover the VAT added to prices. The decision is therefore commercial as well as administrative. ## What if you crossed the threshold months ago? Do not simply register from today's date without checking when the obligation actually arose. You may need to establish: 1. the month in which the rolling taxable turnover first exceeded the threshold; 2. the correct effective date of registration; 3. VAT due on supplies from that date; 4. whether VAT can still be recovered on qualifying pre-registration costs; 5. whether any late-registration penalty exposure exists. Historical sales data by month is more useful than a single annual turnover figure. ## What to gather before asking for help Prepare: - monthly sales for at least the last 12 to 18 months; - a breakdown of the types of goods or services sold; - large contracts or invoices expected in the next 30 days; - customer locations; - whether customers are businesses or consumers; - any exempt or zero-rated activities; - major business costs carrying VAT; - the date you think the threshold may have been crossed. The most useful first question is not “My turnover is £95,000, do I register?” It is **what part of that turnover is VAT-taxable, and on what date did the rolling or forward-looking test first trigger?** ## Common questions ### What is the current UK VAT registration threshold? HMRC currently states that compulsory registration generally applies when taxable turnover goes over £90,000 in a rolling 12-month period or is expected to exceed £90,000 in the next 30 days alone. ### Is the VAT threshold based on a calendar year or accounting year? No. The historic test looks at taxable turnover over the previous 12 months on a rolling basis, so it needs to be monitored continuously. ### Can a business register voluntarily below £90,000? Yes. HMRC allows voluntary VAT registration where taxable turnover is below the compulsory threshold, subject to the normal registration rules. ## Primary sources - [GOV.UK: Register for VAT — when to register](https://www.gov.uk/register-for-vat) --- This page is general information, not individual tax, legal or financial advice.