VAT registration is based on taxable turnover, not profit. Fuel, platform fees and a car purchase do not simply reduce the threshold calculation. Establish your turnover from the contracts and invoices first.
Two tests to monitor
- Look back: has taxable turnover exceeded £90,000 in the last 12 months?
- Look forward: do you expect taxable turnover to exceed £90,000 in the next 30 days alone?
The rolling calculation does not reset on 6 April or 1 January. At each month-end add the newest month and remove the month that has fallen outside the window. Check HMRC’s registration timing rules promptly if either test is met, and if that date has already passed, gather the records for a late registration.
Multiple platforms and other work
Combine relevant taxable activities carried on by the same person or business. Do not give each platform a separate £90,000 allowance. A rented property or another income source may have a different VAT treatment, so do not blindly add every personal receipt either.
Illustration: £68,000 of taxable driver supplies and £25,000 of other taxable trading supplies in the same rolling period total £93,000. The relevant threshold is exceeded even if neither activity exceeds it alone. This example assumes both figures are taxable turnover of the same person.
What to send for a review
Bring monthly totals, operator contracts, invoices and details of other business activities. The VAT guide explains the distinction from operator VAT and flat-rate choices. Request VAT registration support if your records show a threshold issue; do not wait for the annual Self Assessment return.
A rolling-turnover worksheet example
Synthetic figures below assume all amounts are taxable turnover of one person, measured consistently. Copy this structure into your records and replace the amounts with reconciled monthly totals.
| Month | Taxable turnover |
|---|---|
| October 2025 | £6,500 |
| November 2025 | £6,700 |
| December 2025 | £7,000 |
| January 2026 | £6,800 |
| February 2026 | £6,900 |
| March 2026 | £7,000 |
| April 2026 | £7,200 |
| May 2026 | £7,300 |
| June 2026 | £7,600 |
| July 2026 | £7,900 |
| August 2026 | £8,100 |
| September 2026 | £8,400 |
| Rolling total at September end | £87,400 |
If October 2026 then produces £9,400, remove October 2025’s £6,500 and add the new month: £87,400 − £6,500 + £9,400 = £90,300. That hypothetical month-end exceeds the threshold. Check HMRC’s notification and effective-date rules; the next-30-days-alone test must also be considered throughout the year.
Should you register voluntarily below the threshold?
| Question | Staying unregistered below the threshold | Voluntary registration |
|---|---|---|
| Operator contract and payments | No driver output VAT obligation solely from registration | Confirm VAT payment and invoicing terms; do not assume the operator increases your payout. |
| Business purchases | No input VAT recovery as an unregistered business | Recovery depends on invoice, restrictions, use and scheme. |
| Large vehicle purchase | Budget using the actual cash cost | Review the taxi exception and scheme before assuming any refund. |
| Administration | Continue normal records and threshold monitoring | Add VAT records, returns and software responsibilities. |
| Decision | Monitor both mandatory registration tests | Compare actual output VAT, recoverable input VAT, fees and cash timing. |
Example decision process: a driver below the threshold considering a VAT-bearing car purchase should obtain the sale invoice and operator terms before comparing registration. A large purchase is not, by itself, proof that voluntary registration saves money. Ask for a VAT scheme review using those documents.
If registration is appropriate, compare the schemes using our standard VAT and Flat Rate Scheme worked examples. Check the VAT-inclusive turnover and limited-cost test before assuming a flat-rate saving.
Sources checked 8 October 2026: Vat · Taxi Vat.
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