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Pillar · the decision

Voluntary or compulsory: when to register

You can register for VAT before you hit £90,000. Sometimes that pays; sometimes it is cost without offset. The answer turns on three things — here they are.

Policy state · verified

Voluntary VAT registration

VAT Notice 700/1 (who should register) · Last verified 13 Jun 2026

gov.uk/guidance/who-should-register-for-vat-notice-7001

Compulsory registration

You must register once your rolling 12-month taxable turnover crosses £90,000, or you expect to cross it in the next 30 days. There is no choice there — see the threshold explained.

Voluntary registration — three questions

1. Who are your customers? If they are mostly VAT-registered businesses, they can reclaim the VAT you charge, so adding 20% does not really cost them anything. If they are consumers, your VAT is a straight price rise they absorb.

2. Do you have recoverable input VAT? Registering lets you reclaim VAT on equipment, stock, vehicles and other VAT-bearing costs. The more you buy with VAT on it, the more registering early gives back.

3. How much admin can you take? Registration brings quarterly returns and Making Tax Digitalobligations. That is real, recurring work (or an accountant’s fee).

The usual shape of the answer

  • Mostly B2B + significant input VAT → voluntary registration often pays.
  • Mostly B2C + little input VAT → usually wait until you must register.
  • Mixed → genuinely borderline; model both, and check the Flat Rate Scheme too.
VAT Notice 700/1
1

Where is your rolling 12-month turnover now?