If your business is growing, the VAT registration threshold is one number you need to keep a close eye on. Get it wrong — by registering late or misunderstanding when the clock starts — and you could face backdated VAT bills, penalties and interest charges from HMRC. Get it right, and you can plan ahead, protect your cash flow, and make informed decisions about whether voluntary registration might actually benefit your business even before you hit the threshold.
In this guide, we explain the current UK VAT registration threshold for 2026, how the rolling 12-month rule works, what happens when you cross the threshold, and when voluntary registration might be the smarter move.

What Is the UK VAT Registration Threshold in 2026?

The current VAT registration threshold is **£90,000** — and this figure remains unchanged for the 2025/26 tax year. This means that if your taxable turnover exceeds £90,000 in any rolling 12-month period, you are legally required to register for VAT with HMRC.
The deregistration threshold — the level at which you can apply to cancel your VAT registration — is **£88,000**.
These figures have been confirmed by HMRC and the government has indicated no plans to change the threshold in the near future.

How Does the Rolling 12-Month Rule Work?

This is where many business owners get caught out. The VAT threshold doesn’t apply to your accounting year or tax year — it applies to any rolling 12-month period. This means HMRC looks at your last 12 months of taxable turnover at the end of every single month.
**Example:** If at the end of August 2026, your taxable turnover for the 12 months to 31 August exceeds £90,000, you must notify HMRC by 30 September. Your effective registration date would then be 1 October 2026 — the date from which you must start charging VAT on your sales.
This rolling assessment means you could cross the threshold at any point during the year — not just at your financial year-end. Businesses that only check their annual accounts once a year are most at risk of missing the deadline.

The Forward-Look Test — A Rule Many Businesses Miss

In addition to the rolling 12-month rule, there is a second, less well-known VAT registration trigger: the forward-look test.

This rule states that you must also register for VAT immediately if you have reasonable grounds to believe your taxable turnover will exceed £90,000 in the next 30 days alone — even if your historic turnover is well below the threshold.

This most commonly catches businesses that land a large contract. If you sign a deal that would push your taxable supplies over £90,000 within a single month, you must notify HMRC straight away — and your registration takes effect from the start of that 30-day period.

If you’re in discussions about a large contract that could push you over the threshold in a single month, take VAT advice before signing.

What Counts as Taxable Turnover?

A common misconception is that all business income counts toward the VAT threshold. In fact, only **taxable turnover** counts — and there’s an important distinction:
  • Standard-rated sales (20%)** — count toward the threshold
  • Reduced-rate sales (5%)** — count toward the threshold
  • Zero-rated sales (0%)** — count toward the threshold
  • VAT-exempt sales** — do NOT count toward the threshold
  • Out-of-scope income** — does NOT count toward the threshold
This means if your business provides a mix of taxable and exempt services, your actual VAT registration threshold may be higher than you think — because only the taxable portion of your income counts. Getting this right is important for planning and compliance.

What Happens When You Cross the Threshold?

Once you’ve identified that your taxable turnover has exceeded £90,000 in the previous 12 months:
  • You have 30 days** from the end of that month to notify HMRC and register for VAT
  • Your effective registration date** is the first day of the following month
  • From that date**, you must charge VAT on all taxable sales, issue VAT invoices, and submit quarterly VAT returns to HMRC under Making Tax Digital (MTD)
Late registration penalties** are applied as a percentage of the net VAT owed from the date you should have registered — 5% if up to 9 months late, 10% for 9 to 18 months, and 15% for over 18 months, with a minimum charge of £50. HMRC will also backdate your registration and require you to account for VAT on all sales from your original registration date, even if you didn’t charge customers VAT at the time — which can mean a significant unexpected bill.

What If My Turnover Only Temporarily Exceeds the Threshold?

If your taxable turnover crosses £90,000 due to a one-off project or unusually busy period, and you believe it won’t remain above the threshold going forward, you may be able to apply for an **exception from registration
To apply, you need to contact HMRC and provide evidence that your taxable turnover in the 12 months following the breach is expected to remain below the £88,000 deregistration threshold. If HMRC grants the exception, you won’t need to register. If they don’t, they’ll register you regardless.
This is a useful option but requires careful planning — and professional advice is recommended before assuming you qualify.

Should You Register for VAT Voluntarily?

Even if your turnover is below £90,000, you can choose to register for VAT voluntarily. For many businesses, this is actually the smarter move — particularly if:
  • Your customers are VAT-registered businesses (they can reclaim the VAT you charge, so it doesn't affect your pricing competitiveness)
  • You have significant VATable business costs (you can reclaim the VAT you pay on purchases)
  • You want to appear more established and credible to corporate clients
  • You're approaching the threshold and want to plan ahead rather than scramble to register at the last minute
However, voluntary registration isn’t always the right choice — particularly if your customers are mainly individuals or small businesses that can’t reclaim VAT, since adding 20% to your prices could make you less competitive. The right decision depends on your specific business model, customer mix and cost structure.

VAT Schemes Available to Small Businesses

Once registered, small businesses have the option to use simplified VAT schemes designed to reduce the administrative burden:
  • Flat Rate Scheme** — pay a fixed percentage of gross turnover to HMRC instead of calculating input and output VAT individually (available to businesses with taxable turnover up to £150,000)
  • Cash Accounting Scheme** — only account for VAT when you receive payment from customers, rather than when you issue invoices (helpful for cash flow, available up to £1.35 million turnover)
  • Annual Accounting Scheme** — submit just one VAT return per year instead of four quarterly returns, with interim payments throughout the year
Each scheme has its own eligibility criteria and trade-offs. The right scheme for your business depends on your turnover, margin, and the type of customers you serve.

Get Expert VAT Registration Support in Manchester

Understanding the VAT registration threshold, monitoring your rolling 12-month turnover, and choosing the right VAT scheme can all feel complex — especially when you’re focused on running and growing your business.
At Esperta, our VAT specialists in Manchester help businesses across the UK navigate VAT registration from start to finish. Whether you’re approaching the threshold for the first time, considering voluntary registration, or need help choosing the most appropriate VAT scheme, we’ll guide you through the process and make sure everything is set up correctly from day one.
Learn more about our VAT Registration Services →

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