If you are running a business, regardless of whether you operate as a sole trader, in partnership or the business is run as a limited company, you will need to register for VAT if your total taxable turnover in the previous 12 months exceeds the VAT registration threshold of £90,000 or if you expect your taxable turnover to be more than £90,000 in the next 30 days.

If both you and your business are based outside the UK and you supply goods or services to the UK (or expect to do so in the next 30 days), you must register for VAT regardless of your taxable turnover.

Taxable turnover

The trigger for registration for a UK-based business is its taxable turnover. For VAT purposes, this is everything that is not exempt from VAT or outside the scope of VAT. It includes zero-rated goods; reduced rate goods and goods charged at the standard rate. In working out your taxable turnover, you must also take into account:

· goods hired or loaned to customers;

· business goods used for personal reasons;

· goods received in barter or part-exchange or as gifts;

· services from other countries that are subject to the reverse charge;

· goods and services subject to the domestic reverse charge; and

· building work over £100,000 that the business did itself.

Registration deadline

Where taxable turnover in the previous 12 months exceeded £90,000, the business must register for VAT within 30 days of the end of the month in which the threshold was exceeded. The registration is effective from the first day of the second month after which the threshold is exceeded.

Example

Bella is a sole trader. On 7 July 2025 her VAT taxable turnover in the previous 12 months exceeded £90,000 for the first time. Bella must register for VAT by 30 August 2025. Her registration is effective from 1 September 2025.

Where taxable turnover will exceed the VAT registration threshold in the next 30 days, the business must register for VAT by the end of that 30-day period. The registration is effective from the date that the business realised that the threshold would be exceeded.

Example

Cameron signs a contract to deliver goods worth £102,000 on 17 July 2025. He must register for VAT by 16 August 2025. His registration is effective from 17 July. He must therefore charge VAT on those goods.

Where a business registers late, it must pay VAT on taxable goods and services supplied after the date by which it should have registered. A late registration penalty may also be charged.

Businesses which exceed the threshold temporarily can apply for a registration exception.

Registration process A business can register for VAT online (see www.gov.uk/register-for-vat/how-register-for-vat). The information required will depend on whether the business is run by an individual or as a partnership, or by a company.

To register as an individual or partnership, you will need your National Insurance Number, an identity document (such as a passport), bank account details, your unique taxpayer reference (UTR), details of your annual turnover and an estimate of your taxable turnover for the next 12 months. For a company registration, the company registration number, bank account details, UTR, annual turnover and estimated turnover for the next 12 months will be required.

In certain circumstances it is not possible to register online and registration must be done by post, such as if you are applying to join the agricultural flat rate scheme.

Voluntary registration

A business whose taxable turnover is below the VAT registration threshold can register for VAT voluntarily. If you do this, you will need to charge VAT on taxable supplies that you make, but you can claim back VAT on things that you buy for your business. Voluntary registration is worthwhile if you make zero-rated supplies but incur VAT on items that you buy.