VAT Registration: When Should Your Business Register?

What Is VAT and Why Does It Matter?

Value Added Tax (VAT) is a consumption tax charged on most goods and services sold in the UK. If your business is VAT-registered, you charge VAT on your sales (output tax) and can reclaim VAT on your business purchases (input tax). The difference between what you charge and what you reclaim is paid to — or refunded by — HMRC. For many businesses, VAT registration is not optional: once your taxable turnover exceeds the registration threshold, you are legally required to register. However, even businesses below the threshold can choose to register voluntarily, and doing so can offer real financial advantages.

The Compulsory Registration Threshold

As of April 2026, the VAT registration threshold is £90,000. This means you must register for VAT if your taxable turnover in the previous 12 months exceeds £90,000, or if you expect your taxable turnover to exceed £90,000 in the next 30 days alone. This is a rolling 12-month test — not based on your financial year — so you need to monitor your turnover on an ongoing basis.

It is important to note that the threshold applies to taxable turnover, which includes standard-rated, reduced-rated, and zero-rated sales. It does not include exempt supplies or income from outside the scope of VAT (such as salaries, dividends, or interest income). If you are unsure whether your income counts as taxable, it is worth seeking professional advice to avoid an unexpected registration requirement.

If you exceed the threshold and fail to register on time, HMRC can backdate your registration and charge you the VAT you should have been collecting. This means you may need to pay VAT out of your own pocket if you cannot recover it from your customers retrospectively. Late registration can also attract penalties.

The Deregistration Threshold

If you are already VAT-registered and your taxable turnover drops below the deregistration threshold — currently £88,000 — you can apply to deregister. This can simplify your administration and may benefit you if most of your customers are consumers rather than VAT-registered businesses. However, deregistration means you can no longer reclaim input VAT on your purchases, so it is important to weigh the pros and cons carefully.

Voluntary Registration: Why Register Early?

Many businesses assume they should wait until they hit the threshold before registering. In practice, voluntary registration can be a smart move for several reasons:

• Reclaim VAT on expenses: If your business incurs significant costs that include VAT — such as equipment, materials, software subscriptions, or professional services — registering allows you to reclaim that input VAT. For businesses with high start-up costs, this can provide a meaningful cash flow boost.
• Professional credibility: A VAT registration number signals to potential clients and suppliers that your business has reached a certain level of activity. This can be particularly important when tendering for contracts or working with larger businesses that expect their suppliers to be VAT-registered.
• Avoid a sudden price increase: If you wait until you cross the threshold, you will suddenly need to add 20% to your prices (or absorb the cost yourself). Registering early allows you to build VAT into your pricing from the start, avoiding an abrupt adjustment that could unsettle your customers.
• Pre-registration claims: When you register, you can reclaim VAT on goods purchased up to four years before registration (provided they are still in use) and services purchased up to six months before registration. This can result in a useful refund on your first VAT return.

When Voluntary Registration Might Not Be Suitable

Voluntary registration is not always the right choice. If most of your customers are consumers (not VAT-registered businesses), adding 20% VAT to your prices could make you less competitive, as your customers cannot reclaim the VAT. Similarly, if your business expenses are low and you have little input VAT to reclaim, the administrative burden of filing quarterly returns may outweigh the benefits. Businesses that deal primarily in VAT-exempt supplies — such as certain financial, educational, or healthcare services — may also find little advantage in registering.

VAT Schemes: Simplifying Your VAT

HMRC offers several VAT schemes designed to simplify administration or improve cash flow for smaller businesses:

• Flat Rate Scheme: Instead of calculating actual input and output VAT, you pay a fixed percentage of your gross turnover. The percentage depends on your industry. This scheme can save time and, in some cases, money — though since changes in 2017, it is less advantageous for "limited cost traders" (businesses with low material costs).
• Cash Accounting Scheme: You account for VAT based on when you receive and make payments, rather than when invoices are issued. This is helpful for businesses with long payment terms, as you do not have to pay VAT to HMRC before your customers have paid you.
• Annual Accounting Scheme: You submit one VAT return per year instead of four, making interim payments throughout the year based on your estimated liability. This reduces paperwork and makes budgeting easier.

Each scheme has eligibility criteria and limitations, so it is important to assess which one — if any — suits your business. Our VAT services team can help you determine the most suitable approach.

How to Register for VAT

VAT registration is done online through your HMRC Government Gateway account. You will need to provide your business details, an estimate of your expected turnover, your bank account details, and information about your business activities. The process typically takes a few weeks, after which HMRC will issue your VAT registration certificate with your VAT number and the date from which your registration is effective.

If you need to register because you have exceeded the threshold, you must do so within 30 days of the end of the month in which you exceeded it. Your registration will then be backdated to the first day of the second month after you crossed the threshold. For example, if your rolling 12-month turnover exceeded £90,000 at the end of March 2026, you must notify HMRC by 30 April 2026, and your registration will be effective from 1 May 2026.

Making Tax Digital for VAT

All VAT-registered businesses are now required to keep digital records and submit VAT returns through Making Tax Digital (MTD) compatible software. This applies regardless of your turnover. You cannot submit VAT returns through the old HMRC portal. Popular MTD-compatible software includes Xero, QuickBooks, FreeAgent, and Sage. If you are not yet using cloud accounting software, registering for VAT is a good time to make the switch — our cloud accounting services can help you get set up.

Key Takeaways

• You must register for VAT when your taxable turnover exceeds £90,000 in a rolling 12-month period.
• Voluntary registration can help you reclaim VAT on expenses, enhance credibility, and avoid sudden price jumps.
• Consider the nature of your customer base — B2B businesses benefit more from registration than B2C businesses.
• Explore VAT schemes like the Flat Rate Scheme or Cash Accounting to simplify compliance and improve cash flow.
• All VAT returns must be filed digitally under Making Tax Digital rules.
• Seek professional advice if you are unsure whether and when to register. Our VAT specialists are here to help.