UK VAT Registration: Threshold, Deadlines & How to Register in 2026
The UK VAT threshold trips up more small businesses than any other tax rule. Here's when you must register, when it pays to volunteer, and what to file.
7 min read · 15 January 2026
What is the current UK VAT threshold?
HMRC requires UK businesses to register for VAT once taxable turnover exceeds £90,000 in any rolling 12-month period. The threshold is not calendar-year based — it looks back at the previous twelve months on a rolling basis, which catches many owner-managed businesses off guard.
You must also register immediately if you expect to breach the threshold in the next 30 days alone, even if your rolling total is still below it.
How rolling 12-month turnover really works
At the end of each month, add up your taxable turnover for the previous twelve months. If it crosses £90,000, you must register within 30 days of the end of that month, and your effective VAT date is the first day of the second month after you breach.
Zero-rated sales still count toward the threshold. Exempt supplies (like most financial services or residential lettings) do not. Getting this classification wrong is one of the most common HMRC penalty triggers we see.
When voluntary VAT registration pays off
If most of your customers are VAT-registered businesses, voluntary registration lets you reclaim VAT on your costs without materially changing what your customers pay. For B2B service firms and SaaS companies, this often means several thousand pounds a year in reclaimed input VAT.
Voluntary registration also lends credibility to newer companies bidding for enterprise contracts, and it removes the risk of accidentally trading over the threshold without noticing.
Making Tax Digital and the VAT return cycle
Every VAT-registered UK business must file returns through Making Tax Digital-compliant software. Returns are usually quarterly, with payment due one month and seven days after each period ends.
NovaLedge sets up Xero or QuickBooks with MTD filing enabled, reconciles your inputs, and files on your behalf so you never miss a deadline.
Frequently asked questions
- Can I deregister if turnover drops?
- Yes — you can deregister once you expect taxable turnover to fall below £88,000 in the next 12 months.
- Does the threshold apply to non-UK companies?
- Non-UK sellers making taxable supplies in the UK must register from their first sale — no threshold applies to them.