How to Register for VAT as a UK Limited Company

Mandatory versus voluntary registration

You must register for VAT if your taxable turnover in any rolling twelve-month period exceeds the registration threshold (currently £90,000 — always confirm the current figure on HMRC's website, as it can change in a Budget). You must also register if you expect your turnover to exceed the threshold in the next 30 days alone. Failure to register on time results in a penalty and a retrospective VAT liability from the date you should have registered.

Voluntary registration is permitted at any turnover level. It makes sense if most of your customers are VAT-registered businesses (they can reclaim the VAT you charge, so it does not increase their net cost) and you have significant input VAT to reclaim — for example, on equipment, professional services, or commercial rent.

How to register online

Register using the VAT1 form through your Government Gateway account at HMRC's website. You will need your company registration number, the date you became, or expect to become, VAT-liable, your principal business activity (SIC code), an estimate of your expected taxable turnover in the next twelve months, and details of your business bank account for repayments.

HMRC aims to process VAT registration applications within 40 working days, though most are faster. You will receive a VAT registration certificate (VAT4) confirming your VAT number and your effective date of registration. You cannot charge VAT to customers before your effective date of registration.

VAT accounting schemes to consider

Most businesses use the standard VAT accounting method — paying the difference between output VAT charged on sales and input VAT reclaimed on purchases each quarter. Depending on your business model, alternative schemes may be more advantageous:

• Flat Rate Scheme: pay a fixed percentage of gross turnover rather than calculating net VAT — simplifies administration but may cost more or less than standard accounting depending on your input VAT levels (confirm with your accountant)
• Cash Accounting Scheme: account for VAT only when you receive or make payment rather than when you invoice — useful if you have slow-paying customers
• Annual Accounting Scheme: submit one VAT return per year with nine monthly interim payments — reduces administrative burden but can create a large end-of-year adjustment

Each scheme has turnover limits and conditions. Confirm eligibility and suitability with your accountant before electing a scheme.

Making Tax Digital for VAT obligations

All VAT-registered businesses are required to keep digital VAT records and file VAT returns through Making Tax Digital (MTD) compatible software. This means maintaining a digital audit trail from the point of transaction through to the VAT return — paper records and manual re-keying into the HMRC portal are no longer compliant. Your accounting software (Xero, QuickBooks, FreeAgent, Sage) will handle MTD filing if properly configured. Confirm your software is MTD-compatible before your first filing deadline.

VAT returns are typically due one month and seven days after the end of the VAT period. Payment is due at the same time. Missing a payment or filing deadline triggers an HMRC points-based penalty system introduced in 2023.