How to Register for VAT in the UK

VAT registration catches many small business owners off guard — either they miss the deadline and face penalties, or they register too early and create unnecessary admin. This guide explains exactly when you must register for VAT in the UK, how to do it, what VAT scheme to choose, and what your obligations are once you’re registered. It’s aimed at sole traders, limited company directors, freelancers, and anyone approaching the VAT threshold for the first time.

If you would rather not deal with the Government Gateway forms yourself, NDCA can register your business for VAT for you as part of our fixed monthly fee — see how it works below, or book a free 15-minute call.

• What is VAT and who needs to register?
• The VAT registration threshold
• Voluntary VAT registration
• How to register for VAT online
• Choosing the right VAT scheme
• What happens after you register
• Making Tax Digital for VAT
• Common VAT registration mistakes to avoid
• Frequently asked questions

What is VAT and who needs to register?

VAT — Value Added Tax — is a consumption tax charged on most goods and services sold in the UK. As a VAT-registered business, you add VAT to your sales invoices, collect it from customers, and then pay it over to HMRC. You can also reclaim VAT you’ve paid on business purchases, which is one of the main benefits of being registered.

Most businesses selling taxable goods or services need to register once they hit the VAT threshold. Some businesses register voluntarily before reaching it. A small number of businesses are exempt from VAT altogether — typically those selling VAT-exempt goods and services such as most financial services, insurance, and private education.

The VAT registration threshold

In 2026/27, the VAT registration threshold is £90,000. If your taxable turnover exceeds £90,000 in any rolling 12-month period, you must register for VAT. This is not a calendar year — it’s a rolling 12-month window, so you need to check your turnover at the end of every month.

You must also register if you expect your taxable turnover to exceed £90,000 in the next 30 days alone — for example, if you win a large contract that will push you over the threshold. In that case, you must register immediately, not at the end of the 30-day period.

What counts as taxable turnover?

Taxable turnover includes sales of standard-rated goods and services (charged at 20%), reduced-rate supplies (5%), and zero-rated supplies (0%). It does not include VAT-exempt sales, out-of-scope supplies, or the sale of capital assets.

For example, if you’re a builder, most of your work is standard-rated. If you sell children’s clothing, it’s zero-rated — but it still counts towards your taxable turnover for registration purposes.

Penalties for late registration

If you miss the registration deadline, HMRC will backdate your VAT registration to the date you should have registered. You’ll owe VAT on all sales from that point, whether or not you charged it to your customers. HMRC can also issue a penalty of up to 15% of the VAT owed. It’s not a situation you want to find yourself in.

Voluntary VAT registration

You can register for VAT voluntarily even if your turnover is below £90,000. There are genuine reasons to do this, and it’s worth thinking through carefully.

When voluntary registration makes sense

• Your customers are VAT-registered businesses. They can reclaim the VAT you charge, so it doesn’t cost them anything extra. Being VAT-registered can make you look more established.
• You spend heavily on VAT-able purchases. If you buy a lot of stock, equipment, or services with VAT on them, you can reclaim that input VAT once registered.
• You’re growing quickly. Registering early means you won’t need to scramble to register once you hit the threshold.

When it doesn’t make sense

• If most of your customers are consumers (the public), adding 20% VAT to your prices could make you less competitive.
• If your purchases don’t carry much VAT, you have little to reclaim and the admin burden outweighs the benefit.

If you’re unsure, speak to an accountant before registering voluntarily. The decision depends heavily on your business model and customer base.

How to register for VAT online

Most businesses register for VAT online through HMRC’s Government Gateway. The process is straightforward if you have the right information to hand.

What you’ll need before you start

• Your Government Gateway user ID and password (create one if you don’t have one)
• Your business name and address
• Your National Insurance number (for sole traders) or Company Registration Number (for limited companies)
• Details of your business activity and the main goods or services you sell
• Your bank account details
• Your turnover for the last 12 months (or an estimate if you’re registering voluntarily)
• The date from which you want your registration to take effect

Step-by-step: registering online

In broad terms, registering online means creating a Government Gateway account, telling HMRC about your business and turnover, and choosing the VAT scheme you want to use. It looks simple on the HMRC form, but the details that trip people up — the effective date, the right scheme for your business, and what to do about invoices while you wait for your VAT number — are easy to get wrong and can be costly to unpick afterwards.

While you’re waiting for your VAT number, you should still charge VAT on your invoices from the effective date of registration. You can issue revised invoices once you receive your VAT number, or add a note to your invoices stating that a VAT number has been applied for.

Registering by post

If you can’t register online — for example, if you have a more complex business structure or are registering as a group — you can complete a VAT1 form and post it to HMRC. This takes considerably longer, so the online route is strongly preferred for most businesses.

Choosing the right VAT scheme

When you register, you’ll be asked which VAT scheme you want to use. The standard scheme is the default, but there are alternatives that can simplify your record-keeping or improve your cash flow.

Standard VAT accounting

You account for VAT based on the date of your invoices. You pay HMRC the VAT on sales and reclaim VAT on purchases, regardless of whether your customers have paid you yet. VAT returns are usually filed quarterly.

Cash accounting scheme

You only account for VAT when you actually receive payment from customers (and only reclaim VAT on purchases when you pay your suppliers). This is helpful if you have slow-paying customers and want to avoid paying VAT to HMRC before you’ve collected it. Available to businesses with taxable turnover up to £1.35 million — check the latest HMRC guidance for the current eligibility limit.

Flat Rate Scheme

Instead of accounting for VAT on every single transaction, you pay a fixed percentage of your gross turnover to HMRC. The percentage varies by trade sector. This simplifies your bookkeeping but may not always be financially beneficial. It tends to suit small service businesses with low costs. You cannot use the Flat Rate Scheme if your turnover exceeds £150,000 — check the latest HMRC guidance for full eligibility rules.

Annual accounting scheme

You file just one VAT return per year instead of four, and make advance payments throughout the year. Good for businesses that find quarterly returns a burden. Available if your taxable turnover is £1.35 million or less — check the latest HMRC guidance to confirm current limits.

Choosing the right scheme depends on your turnover, margins, customer payment terms, and how much admin you want to manage. Your accountant can help you model the difference before you commit.

What happens after you register

Once you’re VAT-registered, your obligations change immediately. Here’s what you need to do.

Charge VAT on your sales

From your effective date of registration, you must add VAT to all taxable supplies. Make sure your invoices show your VAT number, the rate of VAT applied, and the VAT amount separately.

Keep VAT records

You must keep a VAT account — a record of all the VAT you charge on sales (output tax) and all the VAT you reclaim on purchases (input tax). Good bookkeeping is essential here. HMRC can inspect your VAT records at any time, and poor records are a common reason for VAT penalties.

Submit VAT returns

Most businesses submit quarterly VAT returns to HMRC. Your return shows the total VAT you’ve charged and the total VAT you’re reclaiming. The difference is either paid to HMRC or refunded to you. Returns must be submitted and payment made within one month and seven days of the end of your VAT period.

Update your invoices and systems

Add your VAT registration number to all invoices, quotes, and receipts. Update your accounting software to handle VAT correctly. If you’re using Xero, for example, you can configure VAT codes for each type of supply and set up your VAT return periods. Xero training can help you get set up properly from the start and avoid errors in your returns.

Making Tax Digital for VAT

All VAT-registered businesses must now comply with Making Tax Digital (MTD) for VAT. This means you must keep digital VAT records and submit your VAT returns using MTD-compatible software — you cannot file using the old HMRC online portal.

If you’re not already using compatible software, you need to act now. HMRC will not accept manual spreadsheets unless they’re linked to MTD-bridging software. Most modern accounting packages — including Xero, QuickBooks, and Sage — are MTD-compatible.

MTD for Income Tax is also on the horizon. From April 2026, self-employed people and landlords with income over £50,000 must also comply with MTD for Income Tax. This is separate from MTD for VAT but reinforces why good digital record-keeping matters.

Common VAT registration mistakes to avoid

Even straightforward VAT registrations can go wrong. These are the mistakes we see most often.

Missing the registration deadline

As mentioned, late registration means backdated VAT liability and potential penalties. Monitor your rolling 12-month turnover every month. If you’re approaching £90,000, get your registration in early.

Choosing the wrong effective date

Your effective date of registration determines when you start charging VAT. Choosing a date too early means you owe VAT on sales before you’ve started charging customers for it. Getting this date right matters.

Failing to charge VAT from day one

Once registered, some business owners forget to update their invoices immediately. If you don’t charge VAT on a sale but are registered, you still owe HMRC the VAT — it comes out of your pocket.

Reclaiming VAT you’re not entitled to

You can only reclaim VAT on purchases that are wholly for business purposes. Reclaiming input VAT on personal expenses — or on purchases where you don’t hold a valid VAT invoice — is a common error that leads to problems during HMRC enquiries.

Not keeping proper records

VAT records must be kept for at least six years. HMRC can ask to inspect them at any time. Digital records maintained through MTD-compatible software make this straightforward.

VAT registration is one of those business milestones that introduces real administrative responsibility. Getting it right from the start — the right scheme, the right software, the right invoicing process — saves you time and money. If you’re approaching the threshold or considering voluntary registration, it’s worth speaking to an accountant before you make the application, not after.

Frequently asked questions

How long does VAT registration take?

Online applications typically take up to 30 working days, though many are processed faster. You’ll receive your VAT registration certificate by post. You should still charge VAT from your effective date of registration while you wait.

Can I reclaim VAT on purchases made before I registered?

Yes, in most cases. You can reclaim VAT on goods purchased in the four years before registration (if you still hold those goods) and on services purchased in the six months before registration, provided you have valid VAT invoices and the purchases relate to your business. Check the latest HMRC guidance for the specific conditions.

What is my VAT number and where do I display it?

Your VAT number is a nine-digit number issued by HMRC when you register. It must appear on all VAT invoices you issue. You should also display it on your website and any other business documentation where invoicing takes place.

Do I have to register for VAT if I only sell zero-rated goods?

Technically yes, if your taxable turnover (which includes zero-rated sales) exceeds £90,000. However, you can apply for a VAT exemption from registration if all or most of your supplies are zero-rated, since you’d always be in a repayment position. You’ll need to apply to HMRC for this exemption — it’s not automatic.

What happens if I deregister from VAT?

You can apply to deregister if your taxable turnover falls below £88,000 — check the latest HMRC guidance for the current deregistration threshold. Once deregistered, you stop charging VAT and can no longer reclaim input VAT. You must also account for VAT on any business assets you hold at the time of deregistration, if the total VAT on those assets exceeds a certain limit.

Do I need an accountant to register for VAT?

You can register yourself online through the Government Gateway, and plenty of business owners do. The parts that catch people out are choosing the right VAT scheme, setting the correct effective date, and making sure invoicing and software are set up properly from day one — get any of those wrong and it can be expensive to correct later. At NDCA, VAT registration is included as part of our fixed monthly fee, so clients get this handled correctly as part of onboarding rather than sorting it out themselves. Book a free call if you would like us to take care of it.