VAT Threshold for the Self-Employed: Who Must Register?

If you're self-employed and your turnover is climbing, there's one number that decides whether you're legally obliged to register for VAT: the registration threshold. Cross it without registering and you'll end up paying VAT out of your own pocket on sales you've already made.

The threshold is £90,000 of VAT-taxable turnover in any rolling 12-month period. This guide is about who must register and why. It explains exactly which sole traders and freelancers are caught by the £90,000 trigger, how the rolling 12-month test works, what counts towards your turnover, and what happens if you leave it too late.

It's written for sole traders, freelancers and small businesses across England, Wales and Northern Ireland. If you trade in Scotland, the VAT rules are the same (VAT is UK-wide), though Scottish Income Tax differs and isn't covered here. If you sell mainly online, our companion guide on the VAT threshold for ecommerce sellers digs into exactly what counts towards your turnover across marketplaces.

What is the VAT threshold for the self-employed? {#what-is-the-vat-threshold}

The VAT registration threshold is the level of VAT-taxable turnover at which you're legally required to register for VAT with HMRC. It's exactly the same for the self-employed as for anyone else: there is no special sole-trader or freelancer figure.

The threshold is £90,000. If your VAT-taxable turnover over any rolling 12-month period goes above £90,000, you must register, whether you trade as a sole trader, a freelancer, a partnership or a limited company.

There's also a separate deregistration threshold of £88,000. If your taxable turnover drops below that and you expect it to stay there, you can apply to deregister.

These thresholds have applied since 1 April 2024. The threshold is set by the government and can change at a future Budget, so always check the current figure on gov.uk before acting on a borderline case.

Which self-employed people have to register? {#who-must-register}

The duty to register attaches to the business, not to the person's job title. So the same £90,000 trigger applies whether you describe yourself as a sole trader, a freelancer, a self-employed contractor or a consultant. A few points decide whether you're caught:

• You make taxable supplies. If everything you sell is genuinely VAT-exempt, you can't register at all. Almost all self-employed trades, from a plumber to a copywriter to a personal trainer, make taxable supplies, so the threshold applies to them.
• Your VAT-taxable turnover, not your profit, crosses £90,000. A freelancer billing £92,000 with £30,000 of profit is over the threshold; profit is irrelevant to the test.
• It's measured per legal person. If you genuinely run two separate businesses as the same sole trader, HMRC adds the turnover together because the registration sits with you as an individual, not with each trade. You can't split one business in two to stay under £90,000 (HMRC calls this "disaggregation" and challenges it).
• You're established in the UK. Self-employed people based overseas who make taxable supplies in the UK face a nil threshold and may have to register from their first UK sale.

In short, if you're a UK-based sole trader or freelancer making mostly taxable sales and your rolling 12-month turnover passes £90,000, registration is compulsory. The rest of this guide is about how to spot that moment and what to do next.

What counts as VAT-taxable turnover? {#vat-taxable-turnover}

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This is where a lot of people trip up. The threshold isn't based on your profit, and it isn't only your standard-rated sales. It's your total VAT-taxable turnover, which is the value of everything you sell that isn't exempt from VAT.

There are three VAT rates in the UK for 2025/26:

Here's the key point: zero-rated sales still count towards the threshold. Zero-rated isn't the same as exempt. A zero-rated sale is taxable, just taxed at 0%, so it counts.

What you include and exclude:

• Include: standard-rated (20%), reduced-rated (5%) and zero-rated (0%) sales.
• Exclude: genuinely VAT-exempt supplies (insurance, most finance, education, many health services) and sales outside the scope of UK VAT.

If every single thing you sell is exempt, you can't register for VAT at all. If you make a mix of taxable and exempt supplies, only the taxable part counts towards the £90,000.

Illustrative example. Sam runs an online shop selling children's clothing (zero-rated) and a smaller range of adult clothing (standard-rated). Over the last 12 months the children's range brought in £85,000 and the adult range £10,000. Even though most of the turnover is zero-rated, the total VAT-taxable turnover is £95,000, which is over £90,000. Sam must register.

When do I have to register for VAT? {#when-to-register}

There are two separate tests. You must register if either applies.

1. The backward-looking test. At the end of any month, your VAT-taxable turnover for the previous 12 months has gone over £90,000. You then have 30 days from the end of that month to tell HMRC, and your registration takes effect from the first day of the second month after you went over.

2. The forward-looking test. You expect your VAT-taxable turnover to go over £90,000 in the next 30 days alone, for example because you've just won a large contract. Here you must register before the 30-day period ends, and registration takes effect from the date you became aware.

The forward-looking test stops businesses from sidestepping VAT by timing one big sale.

Illustrative example. Aisha is a freelance consultant turning over about £60,000 a year. In February she signs a single project worth £95,000 that she'll invoice and deliver within the next month. Even though her past 12 months are well under the threshold, she expects to exceed £90,000 in the next 30 days alone, so she has to register straight away under the forward-looking test.

Because the backward-looking test uses a rolling 12 months and not your accounting year or the tax year, you need to be checking it month by month. We'll come to a simple way to do that below.

What happens if I register late? {#late-registration}

If you should have registered but didn't, HMRC will treat you as having been registered from the date you crossed the threshold. That has real consequences:

• You owe VAT on the sales you made from that date, even though you didn't charge it.
• You usually can't go back to customers to collect it, so it comes out of your own margin.
• A failure-to-notify penalty and interest can be added on top.

The penalty depends on how late you were and whether HMRC sees the failure as careless or deliberate. The practical lesson is simple: catching the threshold a month early is free, catching it six months late is expensive. Monitor your rolling total.

Should I register for VAT voluntarily? {#voluntary-registration}

You can register voluntarily even if your turnover is below £90,000, as long as you make some taxable supplies. Whether it's worth it depends almost entirely on who your customers are and how much VAT you incur on costs.

Voluntary registration tends to help when:

• Most of your customers are themselves VAT-registered businesses. They reclaim the VAT you charge, so adding VAT doesn't really raise your price to them.
• You incur significant VAT on costs (stock, equipment, software, subcontractors) that you could reclaim.
• You're making large one-off purchases and want to recover the VAT.
• Your turnover is close to the threshold and registering now avoids a messy mid-year switch later.

It tends to hurt when:

• Most of your customers are consumers or non-registered businesses. They can't reclaim VAT, so adding 20% effectively makes you 20% more expensive.
• Your costs are low, so there's little input VAT to recover.
• You want to keep admin to a minimum.

Illustrative example. Tom is a B2B web developer turning over £70,000, almost entirely to VAT-registered agencies. He spends roughly £8,000 a year plus VAT on software and equipment. Charging VAT barely changes his price to clients (they reclaim it), and he gets to recover the VAT on his costs. For Tom, voluntary registration is likely worth it.

Contrast that with a wedding photographer selling £45,000 a year to private couples with low running costs. Adding 20% VAT raises the price for customers who can't reclaim a penny, with little input VAT to offset. Voluntary registration would probably do more harm than good there.

If you're on the fence, it's worth running the numbers properly. Our tax advisory team can model both scenarios for your actual figures before you commit.

How do I register for VAT with HMRC? {#how-to-register}

Most people register online through gov.uk. Before you start, have these to hand:

• Your business details (name, trading name, address, business type).
• Your Government Gateway user ID and password.
• Your Unique Taxpayer Reference (UTR) and, if you're a sole trader, your National Insurance number.
• A business bank account for refunds.
• Your turnover figures and the date you crossed (or expect to cross) the threshold.

The steps:

1. Go to the register for VAT page on gov.uk and sign in with your Government Gateway account.
2. Complete the online form: contact and business details, what you do, your turnover, whether you're registering compulsorily or voluntarily, and your chosen VAT scheme.
3. Choose your effective date of registration carefully, as this is the date from which you must charge VAT.
4. Submit, then wait for your VAT registration certificate. It confirms your VAT number, your effective date and your first return due date.
5. Once you have your VAT number, start charging VAT on taxable sales, issue VAT invoices and keep your records digitally.

If juggling registration on top of running the business feels like a lot, that's exactly the kind of thing sole-trader accounting support from Zmartly is built for.

Which VAT scheme should I use? {#vat-schemes}

HMRC offers several schemes. The right one depends on your costs, your customers and how much admin you want.

A few notes on the Flat Rate Scheme. You still charge your customers 20% in the usual way, but you pay HMRC a flat percentage of your VAT-inclusive turnover and generally can't reclaim VAT on purchases (capital assets over £2,000 are an exception). The flat percentage depends on your trade, and there's a 1% discount in your first year of VAT registration. It can simplify life and occasionally save money for very low-cost businesses, but if you buy a lot of standard-rated goods and services, standard accounting usually works out better. Always check the gov.uk flat-rate percentage for your trade and compare the two before joining.

What is Making Tax Digital for VAT? {#mtd-for-vat}

Making Tax Digital (MTD) is HMRC's programme to move tax record-keeping and filing online.

MTD for VAT is mandatory for all VAT-registered businesses, including voluntary registrations, and has been since 1 April 2022. There's no small-business or voluntary-registration exemption from MTD, though HMRC can exempt individuals on limited grounds such as disability or genuine inability to use computers.

In practice it means three things:

• You keep your VAT records digitally.
• You file your VAT returns through MTD-compatible software rather than typing figures into the old HMRC portal.
• You keep your VAT records for at least six years.

You don't have to use any particular brand of software, only software that's MTD-compatible. There are plenty of options at different price points, and HMRC publishes a list of compatible products. If you'd rather not pick and manage software yourself, Zmartly's bookkeeping service handles digital record-keeping and MTD filing for you.

What are my obligations once registered? {#obligations}

Once you're VAT-registered, the ongoing job looks like this:

Charge the right VAT. Add VAT to your taxable sales at the correct rate (20%, 5% or 0%). On a £1,000 standard-rated service you'd charge £1,200, of which £200 is output VAT you owe HMRC.

Issue valid VAT invoices. A full VAT invoice shows your VAT number, the invoice date and number, the customer's details, a description, the net amount, the VAT rate and amount, and the gross total. Simplified invoices are allowed for smaller retail sales.

Keep digital records. Sales and purchase records, your VAT account, and supporting documents, kept digitally for six years under MTD.

File and pay on time. Most businesses file quarterly. The return and any payment are generally due one calendar month and seven days after the end of the VAT period. So for a quarter ending 31 March, the return and payment are due by 7 May.

Reclaim or pay the difference. If the VAT you've charged (output VAT) is more than the VAT on your purchases (input VAT), you pay HMRC the difference. If it's the other way round, HMRC refunds you.

Late returns and late payments attract penalties and interest under HMRC's points-based regime, so it pays to put the deadlines in your calendar or let software prompt you.

How do I track turnover against the threshold? {#tracking-turnover}

The single most common VAT mistake we see with growing sole traders is missing the threshold because they only look at turnover once a year. The test is a rolling 12 months, so you need to check it monthly.

A simple method:

1. Record your VAT-taxable turnover for each month.
2. At the end of every month, add up the last 12 months.
3. Compare that rolling total to £90,000.

Illustrative example. Here's a trader whose monthly sales are creeping up. The rolling total is what matters, not any single month.

Set yourself an early-warning level, say £80,000, so you've got a couple of months to prepare rather than scrambling. Most accounting software can track this and alert you automatically, which is far safer than a once-a-year check.

If you'd like one less thing to watch, Zmartly can monitor your rolling turnover, register you at the right moment and handle every return after that.

Want help deciding whether and when to register for VAT? Book a free 20-minute call with a Zmartly accountant and we'll review your numbers and tell you exactly where you stand. Get in touch.

Frequently asked questions {#faqs}

What is the VAT threshold for 2025/26?

For 2025/26 the VAT registration threshold is £90,000 of VAT-taxable turnover over any rolling 12-month period. If your taxable turnover goes above £90,000, you must register with HMRC. The separate deregistration threshold is £88,000.

Do I have to register for VAT as soon as I hit £90,000?

You must register if your VAT-taxable turnover over the previous 12 months goes above £90,000 (then you have 30 days from the end of that month to notify HMRC), or if you expect to exceed £90,000 in the next 30 days alone. The threshold is based on a rolling 12-month period, not your accounting year.

Does zero-rated turnover count towards the VAT threshold?

Yes. Zero-rated sales are taxable supplies taxed at 0%, so they count towards the £90,000 threshold. Only genuinely VAT-exempt supplies and sales outside the scope of UK VAT are excluded.

Can I register for VAT voluntarily below the threshold?

Yes, as long as you make some taxable supplies. It often helps if most of your customers are VAT-registered businesses (who reclaim the VAT you charge) or if you incur a lot of reclaimable VAT on costs. It usually hurts if you sell mainly to consumers who can't reclaim VAT and your costs are low.

Is Making Tax Digital mandatory if I register voluntarily?

Yes. MTD for VAT has applied to all VAT-registered businesses since 1 April 2022, including voluntary registrations. You must keep digital records and file through MTD-compatible software unless HMRC has granted you an exemption.

What happens if I register for VAT late?

HMRC treats you as registered from the date you crossed the threshold. You'll owe VAT on the sales you made from that date even though you didn't charge it, you usually can't recover it from customers, and a failure-to-notify penalty plus interest may apply.