Understanding the UK VAT Registration Threshold

Understanding the UK VAT Registration Threshold

The UK VAT registration threshold is £90,000. If your taxable turnover goes over that figure in any rolling 12-month period, you normally need to register for VAT.

The important word is rolling. HMRC is not looking at your accounting year or the tax year. It looks at your taxable turnover across any consecutive 12 months, so the figure needs regular attention as your business grows. VAT registration affects pricing, margins and cash flow, so knowing you are getting close gives you time to decide what to do before the deadline decides it for you.

The threshold rose from £85,000 to £90,000 on 1 April 2024 and remains £90,000 as of September 2026. The deregistration threshold is £88,000.

Key Takeaways

• The VAT registration threshold is £90,000 of taxable turnover in any rolling 12-month period.
• You must also register if you expect your taxable turnover to exceed £90,000 in the next 30 days alone. Registration takes effect from the date you formed that expectation.
• After a backward-look breach, you normally have 30 days from the end of that month to tell HMRC, with registration taking effect from the first day of the second month after the breach.
• The VAT deregistration threshold is £88,000.
• Zero-rated sales count towards the threshold. Exempt and out-of-scope income do not.

What Is the VAT Registration Threshold?

Once your taxable turnover exceeds £90,000 in any rolling 12 months, VAT registration normally becomes compulsory. HMRC does not wait until your year end. At each month-end, you look back over the previous 12 months and total your taxable turnover: the value of your VAT-taxable supplies, meaning standard-rated sales at 20%, reduced-rated at 5%, and zero-rated at 0%. Zero-rated income still counts even though you do not charge VAT on it; exempt and out-of-scope income does not.

Crossing £90,000 does not work like a personal allowance: you do not pay VAT only on the turnover above that figure. VAT applies to your taxable supplies from your effective date of registration, so if your rolling turnover exceeds £90,000 in May and your effective date is 1 July, sales before 1 July stay outside your VAT registration, and from 1 July your taxable sales are subject to VAT from the first pound.

For non-established taxable persons (NETPs), the £90,000 threshold does not apply. Registration is required from the first UK taxable supply.

When Do You Need to Register?

Two tests can trigger compulsory registration: one looking backwards at your rolling 12-month turnover, one looking forward at what you expect to supply in the next 30 days. A business can trigger the forward-looking rule even when its historic turnover is nowhere near the threshold.

Because the backward-look test is rolling, you can cross the threshold halfway through your accounting year, so waiting for year-end accounts can leave you several months behind. Gradual growth is particularly easy to miss. A business averaging £7,500 a month reaches £90,000 over 12 months, and a small monthly increase can be enough to tip the rolling total over the line. Growing businesses should check the figure every month rather than treating VAT as a once-a-year job.

The forward-look test applies as soon as you have reasonable grounds to expect your taxable supplies will exceed £90,000 in the next 30 days alone, based on what you expect to supply, not when the customer pays you. Agree a £120,000 taxable contract to be delivered within 30 days, and the registration requirement arises from the date you form that expectation, which is also your effective date of registration.

If a breach is genuinely temporary, you may be able to apply to HMRC for an exception from registration, showing your turnover over the following 12 months is expected to stay below £88,000. Keep monitoring your turnover while HMRC considers it. If refused, you may still need to register from the correct effective date.

Once the backward-look threshold is breached, you normally have 30 days from the end of that month to tell HMRC, with registration taking effect from the first day of the second month after the breach, so a May breach means notifying HMRC by 30 June, with an effective date of 1 July. From that date you are liable for VAT even before your number arrives; you should not issue a VAT invoice until it does, but most businesses adjust pricing in the gap and issue the correct invoice once the number lands.

How to Calculate if You Have Crossed the Threshold

At each month-end, total your taxable sales for that month and the previous 11 against £90,000, then next month drop the oldest and add the newest.

<table>

<thead>

<tr>

<th>Month checked</th>

<th style="text-align:right;">Rolling 12-month taxable turnover</th>

<th>Position</th>

</tr>

</thead>

<tbody>

<tr>

<td>March</td>

<td style="text-align:right;">£86,000</td>

<td>Below threshold</td>

</tr>

<tr>

<td>April</td>

<td style="text-align:right;">£89,000</td>

<td>Below threshold</td>

</tr>

<tr>

<td>May</td>

<td style="text-align:right;">£92,000</td>

<td>Threshold exceeded</td>

</tr>

<tr>

<td>June</td>

<td style="text-align:right;">Recalculate using the newest 12 months</td>

<td>Continue monitoring</td>

</tr>

</tbody>

</table>

Include standard-rated, reduced-rated and zero-rated sales; exclude exempt and out-of-scope income. A taxable one-off asset sale counts too. Sell a business van for £14,000 subject to VAT, and that £14,000 forms part of your taxable turnover.

HMRC's Check what registering for VAT may mean for your business tool is a useful sense check, and most modern accounting software can track rolling turnover automatically, the kind of real-time financial visibility our bookkeeping service is built around.

Is VAT Registration Worth It for Your Business?

Below £90,000, registration is a choice rather than an obligation. It works well for some businesses; for others, the extra administration and effect on pricing outweigh the benefit. The right answer depends on who buys from you, how much VAT you pay on your costs, and how much flexibility you have over pricing.

If registration becomes mandatory, you broadly have three pricing options: add VAT on top of your existing prices, absorb it into your existing margin, or pass on some and absorb the rest. The first is simplest for VAT-registered customers but makes you costlier to consumers, the second protects your headline price but eats margin. Registration also brings ongoing compliance: VAT returns, VAT records, and Making Tax Digital-compatible software unless HMRC gives you an exemption.

Voluntary registration is worth considering when most of your customers are VAT-registered businesses (who can reclaim what you charge, while you reclaim VAT on eligible costs), when you incur significant input VAT on stock, materials, equipment or software, when you make mainly zero-rated sales, or simply when you want to stop tracking whether each month's turnover is creeping towards the compulsory line. Our tax team deals with a lot of these reviews, because the threshold alone does not tell you whether registration is worth it. That depends on your customer mix, margins and recoverable VAT.

Avoiding Common Pitfalls

Check your rolling turnover every month. Waiting until year end can mean the registration date passed months earlier. Be careful about managing turnover around the threshold by delaying work or deferring invoices, since the forward-looking test looks at what you expect to supply, not the date on an invoice. Business splitting needs care too: separate entities do not automatically create separate VAT thresholds, and if HMRC believes a business was artificially divided to avoid registration, it can treat the businesses as one taxable person and backdate VAT liabilities.

If you are already registered and expect turnover to stay below £88,000, you can apply to deregister through your Government Gateway account. This can create a final VAT liability on stock and assets you keep where input VAT was originally reclaimed, though no charge arises if the VAT due would not exceed £1,000.

Other recurring mistakes: leaving zero-rated sales out of the calculation (they still count), assuming VAT is not due until your number arrives (liability starts from your effective date), and choosing the Flat Rate Scheme on headline percentage alone. Check the limited cost trader rules first, as low spend on goods can mean a 16.5% rate.

Late notification still means owing VAT from the correct effective date, plus a possible failure-to-notify penalty: 0% to 30% for a non-deliberate failure disclosed within 12 months, rising to 70% for later or deliberate failures, and up to 100% where it's deliberate and concealed. Unprompted disclosure, made before HMRC contacts you, can reduce the penalty, and interest runs on unpaid VAT from when it should have been paid.

Most of this comes down to catching the threshold before it catches you, which is exactly what our tax and compliance service is built to do.

Future Changes to the VAT Threshold

The threshold remains £90,000, with deregistration at £88,000, and no increase has been announced for 2026 or 2027. It last rose from £85,000 in April 2024, having been frozen since 2017. Long freezes matter, since inflation and growth pull more businesses into the VAT system even when the threshold stays still. There is ongoing debate about whether it should move, but nothing has been adopted as law.

If you are approaching £90,000, plan around the current figure. We can look at what VAT would do to your prices, margins and cash flow, and whether voluntary registration is worth doing first.

Brookwood has supported Oxfordshire businesses for more than 35 years. If you would like us to review your VAT position, contact our team and we'll talk you through where you stand.