Limited Company

VAT Registration in 2026: When, Why, and How

10 March 2026

6 min read

By Suyesh Sharma

Written by Suyesh Sharma, FCCA, Founder and Managing Director, Metta Accountants.

Published 10 March 2026

The VAT registration threshold has been frozen at £90,000 since April 2024, and there is no indication it will increase before 2030. With inflation having pushed revenues across many sectors, significantly more small businesses are crossing this line - often without realising their obligations until they are already non-compliant and facing a backdated VAT liability.

The registration trigger - it is not just your invoice value

You must register for VAT when your "taxable turnover" in any rolling 12-month period exceeds £90,000. Critically, this is not your calendar year revenue - it is any 12-month window ending in the current month. HMRC looks backward 12 months each month; if at any point the cumulative figure crosses £90,000, you must notify HMRC within 30 days of the end of the month in which you exceeded the threshold.

Late registration is treated as if you were registered from the date you should have been - meaning HMRC can raise a backdated VAT liability (output tax you should have been charging) less any input tax you would have recovered. For businesses that have not been charging VAT to customers, this creates a real cash cost: either the business absorbs the VAT liability from its margins, or it attempts to recover it from customers retrospectively.

Mandatory vs voluntary registration

Mandatory (£90,000+)

Must register within 30 days of month-end in which threshold was exceeded. Penalty regime applies for late registration - up to 15% of the tax that should have been charged, with no minimum period before penalties start.

Voluntary (Below £90,000)

Beneficial if your customers are primarily VAT-registered businesses (who can reclaim the VAT you charge) and you have significant VAT-bearing costs. Allows full input VAT recovery on expenses from the date of registration.

Choosing the right VAT scheme

Flat Rate Scheme (FRS)

You pay a fixed percentage of gross (VAT-inclusive) turnover to HMRC, regardless of how much VAT you actually charged or incurred. The rate varies by trade sector (typically 9–14%). You keep the difference between the VAT you charge customers and the flat rate you pay. In the first year, a 1% discount applies. Generally advantageous for service businesses with low input VAT (no significant stock or equipment purchases). You must leave if turnover exceeds £230,000.

Cash Accounting Scheme

You account for VAT based on when you receive (or make) payment, rather than when you issue or receive invoices. This aligns your VAT liability with your cash flow - you never pay VAT to HMRC on an invoice that has not yet been settled. Particularly valuable for businesses with slow-paying clients or significant debtor balances.

Annual Accounting Scheme

Submit one VAT return per year rather than quarterly, with advance payments throughout the year based on prior year liability. Reduces the administrative burden of quarterly filings. Suitable for businesses with predictable, stable turnover. Not available if turnover exceeds £1.35m.

Standard Rate Scheme

Quarterly returns based on actual invoices issued and received. Most flexible for input VAT recovery and required once you exit the FRS or other special schemes. Recommended for businesses with significant input VAT or mixed supplies.

The reverse charge - construction and digital services

The domestic reverse charge applies to construction and building services supplied between VAT-registered contractors. Under this mechanism, the customer (not the supplier) accounts for the VAT, eliminating the fraud risk that previously existed when subcontractors charged VAT but failed to remit it to HMRC. If you work in construction, you must determine for every supply whether the reverse charge applies - getting it wrong generates incorrect VAT returns for both parties.

A similar principle applies to digital services supplied cross-border. If you sell digital products (software, subscriptions, downloads) to consumers in EU countries, you may need to register for VAT in those territories or use the OSS (One Stop Shop) scheme to report and pay overseas VAT through a single HMRC registration.

The new late payment penalty regime

HMRC replaced the old default surcharge regime from January 2023 with a points-based system for VAT. Each late return or payment earns a penalty point. At four points, a £200 penalty applies - and a further £200 for each subsequent default. Interest applies separately on overdue VAT at the Bank of England base rate plus 2.5%. The regime resets after a period of full compliance but can escalate rapidly for businesses that are consistently late.