The first VAT question is factual: does the business have to register under the applicable turnover tests? The second is commercial: if it does not have to register, does voluntary registration fit its actual customers, supplies, costs and administration? Do not let the second question distract from the first.
Mandatory tests come first
GOV.UK sets out a rolling-12-month taxable-turnover test and a next-30-days expectation test. At the 2 November 2026 review date the stated threshold is £90,000. Use current guidance and a complete taxable-turnover record; the VAT Registration Threshold Tracker is an internal visibility aid, not a legal determination or filing.
Voluntary registration is a choice with consequences
HMRC says a business that is below the registration threshold can apply voluntarily if it is in business. That may change the VAT the business must account for, the VAT it may recover subject to the rules, invoice treatment, return obligations and customer conversation. It is not automatically a saving or a disadvantage.
Before choosing, create a short fact pack:
- taxable supplies and expected pipeline;
- customer mix and whether customers can generally recover VAT;
- material/equipment/external supplier input profile and evidence;
- proposed effective date and what it changes;
- accounting-system, invoice and cash-flow readiness;
- questions for the accountant/VAT adviser.
HMRC's VAT Notice 700/1 warns that the selected voluntary registration date matters and may not simply be changed later. That is a reason to consider it carefully with advice, not to delay a mandatory registration deadline.
Related FoxSums resources
- VAT Registration Threshold Tracker
- When Should a Small Business Register for VAT?
- VAT on Construction Work: Rate Decision Guide
Next step
If the position is close or a voluntary registration is being considered, compare the current rules with your actual business facts.
Important
General information only. Check the facts and current official guidance for the business’s circumstances.
Sources and review
- Evidence check date: 2 November 2026.
- GOV.UK - when to register for VAT
- GOV.UK - VAT thresholds
- VAT Notice 700/1 supplement