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Most UK business owners know that VAT registration becomes important once turnover reaches £90,000, but the threshold is not simply an annual sales target. Moreover, you need to understand which sales count, how the rolling 12-month test works, and what happens if you expect to cross the limit soon. In this guide, we explain the VAT registration threshold in 2026, taxable turnover, registration deadlines, voluntary registration, deregistration, and the practical steps your business should take.
Key Takeaways
- The UK VAT registration threshold is £90,000 of taxable turnover. Businesses generally must register when taxable turnover exceeds this amount.
- Taxable turnover is not the same as profit. It generally includes taxable sales, including standard-rated, reduced-rated and zero-rated supplies.
- The £90,000 threshold uses a rolling 12-month test. Businesses should monitor turnover continuously rather than checking only at the end of their financial year.
- The next-30-days rule can trigger compulsory registration. A business must also register if it expects taxable turnover to exceed £90,000 in the next 30 days.
- Voluntary VAT registration is available below £90,000. Businesses should compare potential input VAT recovery and commercial benefits against additional administration.
- The VAT deregistration threshold is £88,000. A VAT-registered business whose taxable turnover falls below this level may generally request cancellation, subject to HMRC rules.
- Regular bookkeeping helps prevent late registration. Monitoring taxable turnover monthly gives you more time to act before a registration obligation is missed.
What Is the VAT Registration Threshold in the UK in 2026?
The VAT registration threshold is £90,000 of taxable turnover in the UK for 2026. A business generally has to register for VAT when its taxable turnover exceeds £90,000 over the previous 12 months or when it expects taxable turnover to exceed £90,000 in the next 30 days.
Moreover, the threshold applies to taxable turnover rather than profit. For example, a consultant with £95,000 of taxable sales and £40,000 of business expenses does not compare the £55,000 profit with the VAT threshold; the relevant figure is the taxable turnover.
The UK VAT registration threshold has remained at £90,000 since 1 April 2024. The deregistration threshold increased to £88,000 at the same time.
Furthermore, HMRC’s current guidance confirms that the £90,000 threshold applies for the 2026/27 period.
Why Is the VAT Registration Threshold Important for Small Businesses?
The VAT registration threshold matters because crossing it can create a legal obligation to register, charge VAT and maintain additional VAT records. For a growing small business, failing to monitor the threshold can therefore create unexpected tax and cash-flow issues.
First, registration can affect your pricing and invoices. For example, a business that previously charged a customer £1,000 may need to account for VAT after becoming registered, depending on the applicable VAT rate and commercial arrangement.
Second, registration affects bookkeeping and reporting. VAT-registered businesses generally need to keep appropriate records, submit VAT returns and account for VAT collected from customers and VAT paid on eligible business purchases.
Third, the threshold is particularly important for businesses experiencing rapid growth. A contractor invoicing £7,500 per month, for example, could approach £90,000 quickly and may need to monitor the threshold every month.
How Does the £90,000 VAT Registration Threshold Work?
The £90,000 VAT registration threshold is tested using a rolling 12-month period, not simply your business’s accounting year or tax year. This means you should continually review the taxable turnover generated during the most recent 12 months.
How Does the Rolling 12-Month VAT Test Work?
First, imagine a consultancy has the following taxable turnover over a 12-month period:
| Period | Taxable turnover |
|---|---|
| Previous 6 months | £41,000 |
| Most recent 6 months | £51,000 |
| Rolling 12-month total | £92,000 |
In this example, the business has exceeded the £90,000 threshold because its taxable turnover for the previous 12 months is £92,000.
Moreover, the business should not wait until its financial year ends before checking the figure. The rolling test moves forward continuously, meaning older sales eventually fall outside the 12-month period while newer sales enter it.
The VAT registration threshold is a rolling 12-month test, so businesses should continuously monitor taxable turnover rather than checking only their annual accounts.
Is the VAT Threshold Based on Profit?
The VAT threshold is based on taxable turnover, not profit. For example, if a tradesperson makes £95,000 of taxable sales but spends £30,000 on materials, the relevant VAT threshold figure is generally the taxable sales rather than the £65,000 profit.
Additionally, the cost of running your business does not normally reduce the turnover figure used to determine whether you have crossed the VAT registration threshold.
What Counts Towards the VAT Taxable Turnover Threshold?
VAT taxable turnover is the total value of taxable sales and supplies that count for VAT registration purposes, rather than simply every amount received by the business. HMRC’s guidance distinguishes taxable supplies from exempt supplies and other amounts that fall outside the relevant calculation.
Does VAT Turnover Include Zero-Rated Sales?
Zero-rated sales can count towards taxable turnover even though the VAT rate applied to those supplies is 0%. This distinction is important because zero-rated does not mean exempt for VAT registration purposes.
For example, a business making £70,000 of standard-rated supplies and £25,000 of zero-rated taxable supplies could have £95,000 of taxable turnover for threshold purposes.
Moreover, HMRC’s guidance confirms that taxable turnover can include standard-rated, reduced-rated and zero-rated supplies.
Are VAT-Exempt Sales Included in the VAT Registration Threshold?
VAT-exempt sales are treated differently from taxable supplies when calculating the VAT registration threshold. For example, a business may make supplies that are exempt from VAT, and those supplies should not simply be added to taxable turnover as though they were standard-rated sales.
At the same time, businesses with mixed activities need to take care when classifying their income because VAT treatment can depend on the nature of the supply.
For example, a consultancy providing taxable professional services should generally distinguish those fees from genuinely exempt income when calculating its taxable turnover.
When Must a Business Register for VAT?
A business must generally register for VAT when its taxable turnover exceeds £90,000 over the previous 12 months or when it expects taxable turnover to exceed £90,000 in the next 30 days.
What Happens If You Exceed £90,000 Over 12 Months?
First, if your taxable turnover exceeds £90,000 during the rolling 12-month test, you need to register under the compulsory registration rules.
For example, if your taxable turnover passes £90,000 on 15 July under the previous-12-month test, the registration deadline is calculated according to HMRC’s rules and your effective registration date will follow the applicable registration timetable.
Moreover, HMRC’s guidance states that you must pay any VAT due from the effective date of registration.
What Happens If You Expect to Exceed the VAT Threshold in the Next 30 Days?
A business must also register if it expects its taxable turnover to exceed £90,000 in the next 30 days. This rule is different from the rolling 12-month test because it focuses on expected taxable turnover during a specific upcoming 30-day period.
For example, suppose a contractor signs a £100,000 taxable contract that will create turnover within the next 30 days. The contractor may have a VAT registration obligation even if their previous 12 months of taxable turnover were only £50,000.
The next-30-days VAT rule can trigger registration before a business has actually reached £90,000 in historical turnover.
How Long Do You Have to Register for VAT After Exceeding the Threshold?
The VAT registration deadline depends on why you became liable to register and when the threshold condition was met. Businesses should therefore identify the precise date of the threshold event rather than assuming they can register whenever convenient.
First, HMRC provides a specific deadline for businesses that exceed the £90,000 threshold under the previous-12-month test. For example, HMRC’s guidance uses a case where the threshold is exceeded on 15 July and explains that registration is required by 30 August, with an effective registration date of 1 September.
Second, the rules differ where you realise that taxable turnover will exceed £90,000 in the next 30 days. In that situation, the effective registration date can be the date on which you realised the threshold would be exceeded.
As such, recording the exact date on which the VAT obligation arises is essential. Good bookkeeping can help you identify that date and retain evidence supporting your calculation.
Can You Register for VAT Voluntarily Below £90,000?
Businesses with taxable turnover below £90,000 can voluntarily register for VAT. Voluntary registration may be useful when the commercial and tax benefits outweigh the additional administration.
What Are the Benefits of Voluntary VAT Registration?
First, voluntary registration can allow a business to reclaim eligible input VAT on qualifying business purchases. For example, a VAT-registered consultancy purchasing eligible equipment and services may be able to recover VAT according to the applicable rules.
Second, VAT registration can sometimes make commercial sense when your customers are mainly VAT-registered businesses. Those customers may be able to recover VAT they are charged, which can reduce the pricing impact.
Third, registration can support a business that expects continued growth. However, registration should not be treated as automatically beneficial simply because the business is growing.
What Are the Disadvantages of Voluntary VAT Registration?
At the same time, voluntary registration creates additional compliance and administration. You may need to maintain VAT records, submit VAT returns, account for output and input VAT, and ensure invoices contain the required information.
For example, a small consumer-facing business may find that adding VAT to prices affects competitiveness if its customers cannot reclaim VAT.
What Happens If You Go Over the VAT Threshold?
If you become liable for VAT registration, you need to register with HMRC and account for VAT from the applicable effective registration date. You should not simply wait until the end of the financial year to deal with the obligation.
First, review your rolling taxable turnover and identify the exact date on which the registration obligation arose.
Second, review your invoices and customer pricing. If registration is required, you need to understand how VAT will affect the amounts you charge and the VAT you must account for.
Third, prepare your bookkeeping system. HMRC states that VAT-registered businesses generally need to keep digital VAT records and use compatible software to submit VAT returns, subject to applicable rules and exemptions.
Fourth, consider professional support if your VAT treatment is complicated. This can be particularly useful when you have mixed taxable and exempt supplies, international transactions, unusual contracts or uncertainty about the effective registration date.
What Should You Do If You Registered for VAT Late?
Late VAT registration can create a tax liability because VAT may be due from the effective date on which the business should have been registered. HMRC confirms that VAT owed is payable from the date of registration.
Moreover, late registration can create additional compliance and financial problems, particularly where invoices were issued without VAT and customers have already paid the agreed amounts.
As such, businesses that discover they have crossed the threshold should act promptly rather than continuing to trade as normal.
What Is the VAT Deregistration Threshold in the UK?
The UK VAT deregistration threshold is £88,000, meaning a VAT-registered business whose taxable turnover falls below that level may generally request cancellation of its VAT registration, subject to HMRC rules.
First, the £88,000 figure is deliberately lower than the £90,000 registration threshold. This gap helps reduce situations where businesses repeatedly register and deregister because turnover fluctuates slightly around one threshold.
Second, falling below £88,000 does not automatically cancel your VAT registration. HMRC explains that a business can ask for cancellation when taxable turnover falls below the cancellation threshold, subject to the relevant conditions.
The £90,000 figure is the registration threshold, while £88,000 is the standard deregistration threshold.
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How Can You Check Whether Your Business Is Approaching the VAT Threshold?
The simplest way to monitor the VAT threshold is to maintain a rolling 12-month taxable turnover calculation and review it regularly.
First, update your sales records every month. For example, a business with £78,000 of taxable turnover should not assume it has £12,000 of room without considering its rolling 12-month position and expected sales.
Second, review the next 30 days separately. A major contract, unusually large invoice or new customer agreement could create a registration obligation under the forward-looking test.
Third, classify your sales correctly. Separate taxable supplies from exempt and out-of-scope amounts so your threshold calculation is based on the right figures.
Fourth, use reliable bookkeeping records. Businesses that need additional support can consider outsourced bookkeeping services to maintain accurate sales records and monitor important tax thresholds.
Should a Small Business Register for VAT Before Reaching £90,000?
A small business should consider voluntary VAT registration before £90,000 when the expected commercial and tax benefits outweigh the additional VAT administration.
First, consider your customers. A business selling mainly to VAT-registered companies may face less pricing resistance because those customers may be able to recover VAT.
Second, consider your costs. A business with significant VAT-bearing expenses may benefit from recovering eligible input VAT.
Third, consider administration. VAT registration means taking responsibility for VAT records, returns and payments, so the potential benefit should justify the additional compliance work.
For example, a growing consultancy with business-to-business clients and substantial VAT-bearing expenses may have stronger reasons to consider voluntary registration than a small consumer-facing business with limited expenses.
What Should a Business Do Next If It Is Approaching the VAT Threshold?
A business approaching the VAT threshold should calculate its taxable turnover, check the next 30 days, review its VAT treatment and prepare for registration before the deadline becomes urgent.
Use this practical checklist:
- Calculate rolling taxable turnover for the previous 12 months.
- Review upcoming sales to determine whether the next-30-days rule could apply.
- Separate taxable and exempt supplies in your bookkeeping records.
- Check your effective registration date if you have already crossed the threshold.
- Review pricing and contracts to understand how VAT may affect customers.
- Prepare your HMRC registration information, including turnover details and expected taxable turnover.
- Set up appropriate bookkeeping procedures for VAT records and returns.
- Consider professional advice if your VAT position is uncertain or complex.
HMRC says businesses registering for VAT may need information such as their business details, annual turnover and estimated taxable turnover for the next 12 months. Limited companies may also need company registration, bank account, UTR, Corporation Tax and PAYE information.
What Tools Can Help You Monitor the VAT Registration Threshold?
Accurate bookkeeping software and regular financial reviews can make VAT threshold monitoring easier by keeping sales information organised and up to date.
First, use your accounting software to maintain a current sales ledger and identify taxable turnover. For businesses already using cloud accounting, this can reduce the risk of relying on manually maintained spreadsheets.
Second, HMRC provides online VAT guidance and tools that can help businesses understand registration and the potential implications of VAT. HMRC’s VAT registration estimator can also help businesses assess what registering may mean for their circumstances.
Third, free spreadsheets can still work for very small businesses if records are maintained consistently. However, as transaction volumes increase, professional bookkeeping software or accountant support can make threshold monitoring more reliable.
What Should You Do Next About the VAT Threshold?
The best next step is to check your taxable turnover now rather than waiting until your business is close to £90,000.
First, calculate your current rolling 12-month taxable turnover and record the figure. Next, check whether you expect taxable turnover to exceed £90,000 during the next 30 days.
Then, review how each type of income is treated for VAT purposes. If you have mixed supplies, international transactions or unusual arrangements, professional advice can help you avoid an incorrect threshold calculation.
Finally, make VAT monitoring part of your regular bookkeeping routine. A monthly review gives you much more visibility than checking your turnover only when preparing annual accounts.
Conclusion
The UK VAT registration threshold is £90,000 of taxable turnover, but understanding when you must register requires more than watching a single annual sales figure. The rolling 12-month test, the separate next-30-days rule, taxable turnover classifications and registration deadlines all matter.
Moreover, the £88,000 deregistration threshold, voluntary registration option and ongoing VAT compliance requirements should be considered when making VAT decisions.
Ultimately, regular bookkeeping is one of the simplest ways to stay ahead of the VAT threshold. If your business is approaching £90,000, review your figures now, check your expected sales and get professional advice if you are unsure about your registration position.
Written by ASK Accountants UK Ltd
Reviewed by ASK Accountants UK Ltd — Tax and Accounting Team
Disclaimer: This article was initially drafted using AI assistance. However, the content has undergone thorough revisions, editing, and fact-checking by human editors and subject matter experts to ensure accuracy.
