Check the linked official guidance for current rules and your own circumstances.
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Start with the two tests, not your year-end accounts
For a typical UK-established business, compulsory registration can arise when taxable turnover goes over £90,000 in the last 12 months, or when you expect taxable turnover in the next 30 days alone to exceed £90,000. The first test uses a rolling period, not your accounting year. It is turnover rather than profit; zero-rated sales can count too.
That means a large order can matter before your next accounts are prepared. Keep the two tests separate: a forecast for the whole coming year is not the same as the next-30-days test. Check HMRC’s registration rules for special circumstances and the sales included.
A rolling-turnover example you can use
Imagine a business has £86,000 of taxable turnover across the 12 months ending in May. In June it makes £9,000 of taxable sales, while £3,000 from the oldest month drops out of the rolling period. Its new total is £92,000. Adding June without removing the oldest month would give £95,000; counting only the current financial year could miss the threshold altogether.
| Step | Amount |
|---|---|
| Previous rolling 12-month total | £86,000 |
| Add June taxable sales | +£9,000 |
| Remove the oldest month | -£3,000 |
| New rolling 12-month total | £92,000 |
This is an illustration, assuming all the amounts shown are taxable turnover and no special rule applies. Build your own month-by-month schedule from sales records, not just bank deposits. If payments are received after fees or in instalments, reconcile them to the underlying transactions before relying on a total.
The application deadline and registration date are different
For the rolling-12-month test, you must notify HMRC within 30 days after the end of the month in which the threshold is exceeded. The usual effective registration date is the first day of the second month after that month. In the example above, crossing in June means an application deadline of 30 July and an effective date of 1 August.
For the next-30-days test, the effective date is generally the date the expectation arises, with notification within that 30-day period. These rules can produce different dates, so do not treat the application day as your automatic VAT start date. VAT Notice 700/1, sections 4.2 and 4.3 explains the timing.
Prepare a registration pack rather than a pile of screenshots
Keep a short summary of the business activity beside your turnover schedule. Note which transactions you believe are taxable, exempt or outside scope, and flag the ones you are unsure about. Include signed or confirmed orders that could affect the next-30-days test. This gives a reviewer something to check, rather than a single unexplained number.
For a limited company, HMRC lists company registration details, the business bank account, UTR and turnover information among the information needed. Other business types have different requirements. Prepare the documents securely and agree how to share them; do not send identity documents in an ordinary initial enquiry. See HMRC’s application checklist.
- Business activity and legal structure
- Month-by-month sales records and a rolling total
- Details of any large upcoming order
- Relevant registration and tax references
- Questions about unclear sales or transaction types
Check the effect on prices before changing invoices
Registration affects more than a form. Consider how you quote prices, whether customers are businesses or consumers, and what your existing contracts say. As a simple arithmetic example, a £100 net price with 20% VAT becomes £120 gross. If you hold a VAT-inclusive price at £100, the net amount is £83.33 and VAT is £16.67. This example assumes the standard rate applies; it does not decide the VAT treatment of your product.
Before changing prices, list the questions to resolve: the applicable rate, the effective date, treatment of existing orders and what customers have already been promised. Waiting for a registration number does not remove the need to plan for the effective date. Use the HMRC guidance on waiting for your number before changing invoice wording.
Plan the first return while you prepare the application
Once registration is in progress, agree who will keep the records, which software will be used and who will answer questions before a return. Avoid creating one process for sales invoices and a completely disconnected one for purchase documents.
VAT-registered businesses generally need digital VAT records and compatible software unless exempt from Making Tax Digital for VAT. Keep supporting invoices and a clear explanation of adjustments. HMRC’s VAT record guidance covers the requirements.
Ask for VAT registration help with your turnover schedule and questions ready. MB Accounting can discuss the registration work separately from bookkeeping and ongoing VAT-return preparation, so the scope is clear before you begin.
Questions answered
Does the £90,000 threshold use profit?
No. The registration tests use taxable turnover rather than business profit. Check which transactions count before calculating your total.
Can I wait until my financial year ends?
The retrospective test looks at the last 12 months on a rolling basis. A financial-year total is not a substitute for that check.
Does a bookkeeping or VAT-return package automatically include registration?
No. Registration and ongoing return preparation are different tasks. Agree the registration scope before assuming it is included in a package.