VAT Registration Guide for UK Businesses 2026

VAT registration is one of the bigger thresholds in UK business — cross it without registering and you face backdated VAT, penalties and interest. This guide explains exactly when you must register for VAT in the UK, when you might choose to register voluntarily, the schemes available, your obligations under Making Tax Digital, and the practical steps to register and stay compliant.

When you must register for VAT (compulsory registration)

You must register for VAT if either of these is true:

1. Your VAT-taxable turnover in any rolling 12-month period exceeds the registration threshold (£90,000 for 2026/27 — check GOV.UK for the latest).
2. You expect your VAT-taxable turnover to exceed £90,000 in the next 30 days alone.

“VAT-taxable turnover” is total sales of goods and services that are not VAT-exempt. It does not include income from VAT-exempt activities (e.g. some financial services, education and residential property letting).

Key points often missed:

• The £90,000 test is rolling 12 months — not your accounting year, not the tax year. You check at the end of every month whether your last-12-months turnover crossed the threshold.
• You must register within 30 days of crossing the threshold or expecting to.
• Your effective date of registration is the first of the second month after you exceeded the threshold (or the date you expected the breach for the 30-day test).

Example: when does VAT registration kick in?

Imagine you run a Reigate consultancy. In May 2026 you check the last 12 months of turnover and the total is £92,000 — you crossed the threshold in May. You must:

• Register by 30 June 2026 (within 30 days of month-end).
• Your effective date of registration is 1 July 2026.
• From 1 July, you must charge VAT on your invoices (at 20% on most services).
• You then submit your first VAT return covering the period from 1 July.

If you ignore this and only register in October, HMRC will backdate registration to 1 July and demand the VAT that should have been charged — you may have to pay it out of your own pocket if clients refuse retrospective invoices.

Voluntary VAT registration

Even if your turnover is below £90,000 you can choose to register. Common reasons to do so:

• Reclaim input VAT on business purchases (especially if you’re investing in equipment, premises or stock).
• Look more established to B2B customers — a VAT number can signal professionalism.
• B2B customers reclaim it anyway — if your clients are VAT-registered, the VAT you charge costs them nothing because they reclaim it.
• Prepare for growth — if you are heading towards the threshold anyway, registering early avoids a sudden cliff edge.

Reasons not to:

• If your clients are consumers (not VAT-registered), charging VAT effectively raises your price by 20%, making you less competitive.
• Compliance overhead: quarterly VAT returns, digital records under MTD, more bookkeeping.

Deregistration: when you can come off VAT

You can request deregistration if your VAT-taxable turnover in the next 12 months will be below the deregistration threshold (£88,000 for 2026/27, normally £2,000 below the registration threshold).

You must deregister if you stop making taxable supplies entirely (e.g. cease trading, sell the business, or move to fully VAT-exempt activities).

Standard rate vs other VAT rates

VAT rate	Examples
Standard (20%)	Most goods and services
Reduced (5%)	Domestic fuel, children’s car seats, some home energy-saving installations
Zero (0%)	Most food, children’s clothing, books, public transport, new builds
Exempt	Most financial services, insurance, residential letting, some education
Outside scope	Wages, dividends, statutory fees

The difference between zero-rated and exempt matters: zero-rated supplies are VAT-able (at 0%) and you can reclaim input VAT on related costs. Exempt supplies are not within VAT at all and you cannot reclaim input VAT on costs that relate to them.

VAT schemes for small businesses

The default is the standard accounting scheme: charge VAT on every sale, reclaim VAT on every purchase, submit quarterly. Several alternative schemes exist:

Flat Rate Scheme

For businesses with turnover up to £150,000. You charge VAT at 20% to customers but pay HMRC a flat percentage of gross turnover (the percentage varies by trade — e.g. 14.5% for management consultancy, 12% for accountancy). In exchange, you generally cannot reclaim input VAT except on large capital purchases over £2,000.

Watch out for the “limited cost trader” rule — if your spend on relevant goods is low relative to turnover, you may have to use a 16.5% flat rate, which usually makes the scheme unattractive.

Cash Accounting Scheme

For businesses with turnover up to £1.35 million. You account for VAT on the date you receive payment (sales) or make payment (purchases), rather than the invoice date. Helps with cash flow if you have slow-paying customers.

Annual Accounting Scheme

For businesses with turnover up to £1.35 million. One VAT return per year instead of four, with payments on account during the year. Simpler admin but no recovery of overpaid VAT until the year-end return.

Making Tax Digital for VAT — non-negotiable

All VAT-registered businesses are within Making Tax Digital (MTD) for VAT. You must:

• Keep digital VAT records (in MTD-compatible software or via bridging software for spreadsheets).
• Submit VAT returns through that software — the old HMRC online portal is closed for VAT.
• Maintain digital links — no manual retyping of figures between systems.

If you are about to register for VAT, you must register for MTD VAT at the same time. See our Making Tax Digital guide for software options and setup.

How to register for VAT (the steps)

1. Check turnover. Confirm you’re either above the threshold, expecting to be in 30 days, or want to register voluntarily.
2. Gather information. Business name, address, contact details, bank account, Companies House number (for limited companies), UTR, and a description of business activities.
3. Register online via your Government Gateway account at gov.uk/register-for-vat. Most registrations are processed within 30 working days.
4. Sign up for MTD for VAT as part of the registration process.
5. Set up MTD-compatible software and configure VAT settings before your first return is due.
6. Update invoices and pricing to include VAT from the effective date of registration.

You will receive a VAT registration number, an effective date of registration, and the dates of your first VAT return period.

After registration: ongoing obligations

• Charge VAT correctly at the right rate on every taxable sale.
• Issue compliant VAT invoices with your VAT number, the VAT rate and the VAT amount.
• Keep digital records of all sales and purchases.
• Submit VAT returns (usually quarterly) by the deadline — typically one month and seven days after the end of each VAT period.
• Pay VAT due by the same deadline, usually by Direct Debit.

Late submission penalties under the points-based system are real — four late quarterly returns trigger a £200 penalty, and points stay on your record for two years.

Common VAT mistakes

• Missing the threshold. Not monitoring rolling 12-month turnover and finding out months later you should have been VAT-registered. Backdating + interest hurts.
• Charging VAT before registration confirmed. You can charge VAT from your effective date of registration, but you cannot put your VAT number on invoices until issued. Many businesses raise invoices marked “VAT pending” and reissue after.
• Choosing the wrong scheme. The Flat Rate Scheme looks simple but can cost more than the standard scheme depending on your trade and costs.
• Treating zero-rated as exempt (or vice versa). The treatment of input VAT recovery is completely different.
• Forgetting to deregister when ceasing trade or moving below the threshold for long enough.

Frequently asked questions

What is the VAT registration threshold for 2026? The compulsory registration threshold is £90,000 of VAT-taxable turnover on a rolling 12-month basis. You must also register if you expect to exceed £90,000 in the next 30 days alone.

Can I register for VAT voluntarily below the threshold? Yes. Voluntary registration lets you reclaim input VAT and can look more established to B2B clients. It rarely makes sense if your customers are consumers, because charging 20% effectively raises your prices.

How long does VAT registration take? Most online applications are processed within about 30 working days, though it can take longer if HMRC needs to verify your details. You can charge VAT from your effective date of registration but should hold off putting a VAT number on invoices until it is issued.

Do I have to use software for VAT? Yes. All VAT-registered businesses are within Making Tax Digital for VAT and must keep digital records and file through compatible software — the old online portal is closed. See our Making Tax Digital guide.

What happens if I register late? HMRC backdates your registration to the date you should have registered and demands the VAT you should have charged, plus penalties and interest. If clients will not accept retrospective invoices, you may have to pay that VAT yourself.

Should I use the Flat Rate Scheme? It can simplify admin and occasionally save money, but the “limited cost trader” rule (a 16.5% rate) often makes it more expensive than the standard scheme. Model both before choosing.

Get help with VAT registration

We help businesses with VAT registration, scheme selection, MTD setup, and ongoing VAT return preparation. If you are approaching the threshold or have just crossed it, get advice now — the rules around timing and effective dates have catches that cost money if you get them wrong.

Read about our VAT return services and Making Tax Digital service, see our Making Tax Digital guide, or book a free consultation.

For the official rules, see GOV.UK: VAT registration.