When does your business need to register for VAT?
VAT is one of those things many business owners don’t think much about in the early days. You’re focused on winning work, serving customers and growing the business. Then, at some point, someone asks, “Are you VAT registered?” and you start wondering whether it’s something you need to do.
The problem is that many business owners aren’t completely sure when VAT registration becomes a requirement. Some think they’ll hear from HMRC when it’s time to register. Others keep putting it off because they’re worried about the extra paperwork or making them less competitive as their prices will have to increase.
Getting it wrong can be expensive. If you register later than you should, you could end up owing VAT on sales you’ve already made. On the other hand, registering before you need to may not always be the best option for your business.
What is VAT registration?
VAT (Value Added Tax) is a tax charged on many goods and services sold in the UK. The standard rate is currently 20%, although some goods and services qualify for reduced or zero rates. Most VAT-registered businesses charge VAT on their sales and pay it to HMRC, but they can also usually reclaim VAT paid on eligible business purchases and expenses. This can be a valuable benefit, particularly for businesses with significant running costs.
Once your business is VAT registered, you’ll generally need to:
- Charge VAT on applicable sales
- Submit VAT returns to HMRC
- Keep VAT records
- Pay any VAT due to HMRC
- Follow Making Tax Digital (MTD) requirements for VAT
Not every business needs to register straight away. Whether registration is required depends mainly on your taxable turnover.
VAT registration also includes Making Tax Digital compliance
Registering for VAT isn’t just about charging VAT on your sales. Most VAT-registered businesses must also follow Making Tax Digital (MTD) for VAT, which means keeping digital records and submitting VAT returns quarterly using compatible software.
If you’re registering for VAT for the first time, it’s worth checking that your bookkeeping system meets MTD requirements. An accountant can help you choose the right software and ensure everything is set up correctly from the start.
What is the current VAT registration threshold?
As of 2026, you must register for VAT if your VAT taxable turnover exceeds £90,000.
This threshold was increased from £85,000 to £90,000 by the Government and remains the current registration threshold.
It’s important to remember that the threshold applies to your VAT taxable turnover, not your profit.
Many business owners mistakenly look at how much profit they make, but HMRC is concerned with the value of your taxable sales.
What counts towards VAT taxable turnover?
Your VAT-taxable turnover is the total value of the goods and services you sell that are subject to VAT before VAT is added. This includes:
- Standard-rated sales – items charged at the standard VAT rate of 20%.
- Reduced-rate sales – items charged at a reduced VAT rate, such as 5% where applicable.
- Zero-rated sales – items that are subject to VAT but charged at 0%, such as most food and children’s clothing.
Even though no VAT is charged on zero-rated sales, they still count towards your VAT taxable turnover when determining whether you need to register for VAT. Some income, such as VAT-exempt sales, does not usually count towards the VAT registration threshold.
When do you need to register?
There are two situations where VAT registration becomes compulsory.
You've already exceeded the threshold
You must register if your VAT-taxable turnover exceeds £90,000 over the previous rolling 12-month period.
This is one of the areas that often causes confusion.
HMRC doesn’t look at your turnover by tax year, calendar year or accounting year.
Instead, you need to look back at the previous 12 months at the end of every month.
For example, if your total taxable turnover for the 12 months ending 31 August exceeds £90,000, you must register for VAT. In most cases, you need to register within 30 days of the end of the month in which you crossed the threshold, and VAT will normally be due from your effective date of registration. Keeping accurate records is essential so you can identify when the threshold has been exceeded and avoid registering late.
You expect to exceed the threshold soon
You must register if you know your taxable turnover will exceed £90,000 in the next 30 days alone.
This often happens when a business wins a large contract or secures a significant order.
In these situations, you cannot wait until the turnover actually arrives. You must register based on your expectation of future sales, and your VAT registration will usually take effect from the date you realised you would exceed the threshold.
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What happens if you register late?
Late VAT registration can become expensive. If HMRC determines that you should have registered earlier, you may still be liable for VAT on sales made after your effective registration date, even if you didn’t charge your customers VAT at the time.
This means some businesses end up paying the VAT themselves, reducing profits and creating an unexpected tax bill. Depending on the circumstances, HMRC may also charge penalties and interest. This is why monitoring your turnover regularly is so important.
Can you register voluntarily?
Yes. Even if your turnover is below the registration threshold, you can choose to register voluntarily.
For some businesses, this can make sense.
Voluntary registration may be worth considering if:
- Most of your customers are VAT-registered businesses
- You have significant VAT on business expenses
- You want to create the impression of a larger, established business
- You’re expecting growth in the near future
However, voluntary registration isn’t right for everyone.
Once you’re VAT registered, you’ll usually need to add VAT to your prices. Depending on your customers and the market you operate in, this could affect how competitive your pricing appears, whether you’re selling to consumers or other businesses.
The decision should be based on your business model, customer base and future plans.
Signs your business should review its VAT position
Even if you’re not close to the registration threshold today, it’s a good idea to keep an eye on your turnover. You may want to review your VAT position if:
- Sales are increasing rapidly
- You’ve recently won a large contract
- You’re launching new products or services
- You’re expanding into new markets
- Your turnover is approaching the £90,000 threshold
Leaving it until the last minute can create unnecessary pressure and increase the risk of mistakes.
How an accountant can help
VAT registration isn’t just about filling in a form.
The timing of registration, the structure of your business and the type of customers you serve can all affect the best course of action.
An accountant can help by:
Monitoring your turnover
Regular reviews can help identify when you’re approaching the threshold and avoid last-minute surprises.
Confirming whether registration is required
Not all income is treated the same way for VAT purposes. An accountant can help determine what should be included in your taxable turnover calculations.
Advising on voluntary registration
If your turnover is below the threshold, an accountant can help you weigh up the advantages and disadvantages of registering voluntarily.
Managing the registration process
The registration process itself is relatively straightforward, but getting the dates and information correct is important.
Supporting ongoing VAT compliance
Once registered, you’ll need to comply with VAT reporting requirements, maintain digital records and submit VAT returns under Making Tax Digital rules.
Having support in place can make the process much smoother. If you’re unsure whether your business needs to register for VAT, or you’d like help planning ahead, our team can help.
Author
Mukund is a founding member of the Affinity Associates Group and has been with the practice for nearly 40 years. After completing his degree in Accounting and Finance, he went on to qualify with both ACCA and ICAEW in 1991. Over the years, he’s built deep expertise in consultancy, tax, business development, and corporate group structures. Mukund is known for helping clients make sense of complex financial challenges and turning them into opportunities for sustainable growth.
