MTD VAT Threshold Explained: Everything You Need to Know

The VAT registration threshold determines whether your business must register for VAT and, as a consequence, comply with Making Tax Digital for VAT. Understanding this threshold is critical because crossing it triggers both VAT registration obligations and MTD VAT compliance requirements simultaneously. Get the timing wrong and you face backdated VAT liability, penalties, and potential HMRC enquiry.

The current UK VAT registration threshold is £90,000 (from 1 April 2024). This guide explains exactly how the threshold works, what counts toward it, what does not, how the rolling 12-month test operates, when voluntary registration makes sense, and how deregistration works if your turnover drops. Written by ICAEW chartered accountants who advise UK businesses on VAT registration and MTD compliance every day.

Current UK VAT Thresholds (2024/25 and 2025/26)

The threshold increased by £5,000 in April 2024 after being frozen at £85,000 for 7 years. The UK still has one of the highest VAT registration thresholds in Europe. Businesses below £90,000 are not required to register for VAT and therefore do not need MTD VAT compliance.

How the Rolling 12-Month Test Works

The VAT registration threshold is tested on a rolling 12-month basis. This means you must check your VAT-taxable turnover at the end of every month. If total taxable turnover for the past 12 months exceeds £90,000, you must register for VAT within 30 days.

The Backward Look Test

At the end of each month, look back over the previous 12 months. If total VAT-taxable turnover exceeded £90,000 during that period, you must register within 30 days of the end of the month in which the threshold was exceeded.

Example: Backward Look

Your business had the following monthly sales:

At the end of October 2025, your rolling 12-month total exceeds £90,000. You must register for VAT by 30 November 2025 (within 30 days). Your VAT registration takes effect from 1 December 2025 or from the date the threshold was exceeded (1 November 2025) if earlier.

The Forward Look Test

Separately, if at any point you expect your VAT-taxable turnover to exceed £90,000 in the next 30 days alone, you must register immediately. This catches businesses receiving a single large contract or order that pushes them over the threshold in one go.

Example: Forward Look

You currently have £60,000 annual turnover. On 15 March 2026 you win a single contract worth £95,000 starting immediately. Even though your historical rolling 12-month total is below £90,000, the forward look test triggers immediate registration because you expect to exceed £90,000 in the next 30 days.

Late registration penalty: If you should have registered but did not, HMRC can backdate your registration to the date you should have registered. You then owe VAT on all taxable sales from that date, even though you did not charge VAT to your customers. This effectively comes out of your own pocket. The penalty for late registration can be up to 100% of the VAT owed during the late period.

What Counts Toward the £90,000 Threshold

Included in VAT-Taxable Turnover

•       Standard-rated sales (20% VAT) including goods, services, and digital products
•       Reduced-rate sales (5% VAT) including children’s car seats, certain energy supplies
•       Zero-rated sales (0% VAT) including most food, children’s clothing, books, newspapers
•       Sales of assets used in the business (if you sell a business vehicle, this counts)

NOT Included in VAT-Taxable Turnover

•       VAT-exempt supplies (insurance, financial services, education, health, burial, certain land transactions)
•       Sales made outside the UK (exports, services with overseas place of supply)
•       Income from employment (PAYE salary)
•       Investment income (dividends, bank interest)
•       Capital gains
•       Rental income from residential property (VAT-exempt)
•       Hobby income that does not constitute a business

Zero-rated goods trap: Many businesses assume zero-rated sales do not count. They DO count toward the £90,000 threshold even though no VAT is charged. A food wholesaler selling £95,000 of zero-rated food must register for VAT, even though all their sales are at 0%.

Multiple Businesses and the VAT Threshold

Sole Trader With Multiple Activities

If you run multiple businesses as a sole trader (e.g., a plumber who also does property development), ALL activities combine for the VAT threshold test. You cannot keep separate activities below the threshold individually and avoid registration.

Limited Company

Each limited company is a separate entity for VAT purposes. Two Ltd companies each turning over £70,000 do NOT combine. However, HMRC’s anti-avoidance rules can challenge artificial splitting of a single business into multiple companies purely to avoid VAT registration.

Partnerships

A partnership is a single entity for VAT. Total partnership turnover (not individual partner shares) is tested against the threshold.

Voluntary VAT Registration (Below the Threshold)

You can choose to register for VAT even if your turnover is below £90,000. This is called voluntary registration and it is a strategic decision worth careful consideration.

When Voluntary Registration Makes Sense

•       You sell primarily to other VAT-registered businesses (they reclaim the VAT, so your pricing is neutral)
•       You make substantial zero-rated sales (you charge 0% but reclaim input VAT on purchases)
•       You are in start-up phase with significant setup costs (reclaim VAT on equipment, fit-out, professional fees)
•       You expect to cross the threshold soon and want to prepare early
•       You want to appear more established (VAT registration can signal business credibility)

When Voluntary Registration Hurts

•       You sell primarily to non-VAT-registered consumers (they cannot reclaim your VAT, so you become 20% more expensive)
•       You are a service business with minimal input VAT to reclaim
•       The administrative burden of quarterly MTD VAT returns outweighs the financial benefit
•       You are a small retailer, café, or B2C service provider where customers absorb the VAT cost

Voluntary registration decision framework: If more than 75% of your customers are VAT-registered businesses, voluntary registration is usually beneficial. If more than 75% are consumers, it usually hurts. Between 25% and 75%, you need chartered accountant modelling based on your specific cost structure.

When VAT Registration Triggers MTD VAT

The moment you register for VAT (mandatory or voluntary), MTD VAT applies automatically. Since April 2022, there is no separate opt-in. All VAT-registered businesses must:

•       Keep digital records (in MTD-compatible software)
•       Submit VAT returns via MTD API (through software, not the old HMRC portal)
•       Maintain digital links throughout their record-keeping

This means crossing the £90,000 threshold triggers TWO simultaneous obligations: VAT registration AND MTD VAT compliance. You need MTD-compatible software ready when your registration takes effect, not after your first return is due.

Read our Easy MTD VAT Guide for step-by-step software setup and filing.

What to Do When You Are Approaching the Threshold

At £70,000 to £80,000 Turnover

•       Start monitoring your rolling 12-month total monthly
•       Research MTD-compatible software options
•       Consider whether your pricing can absorb or pass on VAT
•       Get chartered accountant advice on timing and scheme choice

At £80,000 to £90,000 Turnover

•       Track monthly totals closely (you are within one good month of triggering)
•       Set up MTD-compatible software account (free trials available)
•       Consider whether to register voluntarily now or wait for mandatory trigger
•       Prepare pricing strategy (will you add VAT on top or absorb it?)
•       Assess which VAT scheme suits your business (Standard, Flat Rate, Cash Accounting)

At £85,000 to £90,000 Turnover

•       Registration is imminent. Prepare now rather than reacting later
•       Get MTD software fully set up and bank feeds connected
•       Inform customers about upcoming VAT (if you plan to add it to prices)
•       Consider the timing of large invoices (can you control when you cross?)

Do NOT artificially suppress turnover: HMRC treats deliberate suppression of turnover to avoid VAT registration as tax fraud. This includes splitting a business into multiple entities, delaying invoices to stay under threshold, or failing to declare cash sales. Penalties can be severe.

VAT Deregistration (Going Back Below the Threshold)

If your turnover falls below the deregistration threshold (currently £88,000), you can apply to deregister from VAT. This also removes your MTD VAT obligations.

When to Deregister

•       Your VAT-taxable turnover has fallen below £88,000 and you expect it to stay there
•       You are closing or downsizing the business
•       The administrative burden of MTD VAT compliance outweighs the benefits
•       Your business has shifted to primarily VAT-exempt activities

How to Deregister

1.     Log into your Business Tax Account on gov.uk
2.     Navigate to VAT services
3.     Request deregistration
4.     Provide expected turnover for next 12 months (must be below £88,000)
5.     HMRC processes within 3 to 6 weeks
6.     You may need to account for VAT on assets held at deregistration date (if over £1,000 total VAT)

Staying Registered Voluntarily After Falling Below

Some businesses choose to stay VAT-registered even when below the deregistration threshold. This makes sense if you regularly reclaim more VAT than you charge, sell primarily to other VAT-registered businesses, or want to maintain the commercial credibility of being VAT-registered.

Case Study: Strategic VAT Registration for a Growing Consultancy

A marketing consultancy based in the Edinburgh area came to us in mid 2025 with turnover of approximately £78,000 and growing at roughly 15% per year. The founder was nervous about crossing the VAT threshold because approximately 60% of clients were small businesses not VAT-registered. She was worried about losing price competitiveness.

Her situation:

•       £78,000 turnover growing at 15% per year
•       Expected to cross £90,000 within 8 to 10 months
•       60% of clients not VAT-registered (B2C effectively)
•       40% of clients VAT-registered businesses
•       Annual business expenses approximately £18,000 (including £3,000 reclaimable VAT)
•       No MTD-compatible software set up

What we did:

7.     Modelled the financial impact: £3,000 per year in reclaimable input VAT vs approximately £6,200 in VAT cost absorbed on non-VAT-registered client work (if she absorbed rather than passing on)
8.     Assessed Flat Rate Scheme eligibility: her sector rate (advertising, 11%) would give effective 11% rate vs standard 20%, saving approximately £2,800 per year
9.     Recommended registering voluntarily NOW on Flat Rate Scheme rather than waiting for mandatory trigger
10. Set up FreeAgent with VAT configuration
11. Restructured pricing: small increase (5-8%) for non-VAT-registered clients, VAT-neutral for registered clients
12. Registered for MTD VAT via software connection

Outcome: Net financial benefit of approximately £1,400 per year from early voluntary registration on Flat Rate Scheme (Flat Rate rebate exceeding pricing adjustment cost). MTD VAT compliance established 8 months before she would have been forced to register, meaning she was fully comfortable with the software and process before mandatory deadlines hit. Zero client losses from the small price increase. Our fee: £95 per month all-inclusive.

MTD VAT Threshold: FAQs

What is the current UK VAT registration threshold?

£90,000 in VAT-taxable turnover over a rolling 12-month period, effective from 1 April 2024. The previous threshold was £85,000 (from April 2017 to March 2024).

How is the VAT threshold calculated?

Rolling 12-month test. At the end of each month, total your VAT-taxable turnover for the previous 12 months. If it exceeds £90,000, you must register within 30 days. Also a forward look test: if you expect to exceed £90,000 in the next 30 days alone, register immediately.

Do zero-rated sales count toward the threshold?

Yes. Zero-rated sales (0% VAT) count toward the £90,000 threshold. A food wholesaler selling £95,000 of zero-rated food must register. Many businesses incorrectly assume zero-rated sales do not count.

Does rental income count toward the VAT threshold?

Residential rental income is VAT-exempt, so it does NOT count. Commercial property rental CAN be opted to tax (in which case it counts). If you have opted to tax commercial property, that income is included in the threshold calculation.

What happens if I register late for VAT?

HMRC backdates your registration to the date you should have registered. You owe VAT on all taxable sales from that date. Since you did not charge customers VAT, this comes from your own pocket. Late registration penalties can reach 100% of the VAT owed during the late period.

Can I register for VAT voluntarily below the threshold?

Yes. Voluntary registration can be beneficial if you sell mainly to VAT-registered businesses, make substantial zero-rated sales, have high setup costs to reclaim, or want to appear more established. Once registered, MTD VAT compliance applies.

What is the VAT deregistration threshold?

£88,000. If your turnover falls below this and you expect it to stay there, you can apply to deregister. Deregistration removes MTD VAT obligations. Some businesses stay registered voluntarily for commercial or financial reasons.

Does the threshold combine multiple sole trader businesses?

Yes. A sole trader with multiple activities combines ALL for the threshold test. Two businesses each at £50,000 equals £100,000 combined, triggering registration. You cannot artificially split to avoid the threshold.

Do separate limited companies combine for the threshold?

Generally no. Each Ltd company is separate for VAT. However, HMRC anti-avoidance rules can challenge artificial splitting of a single business across multiple companies purely to avoid registration.

What is the Flat Rate Scheme and should I use it?

Flat Rate Scheme simplifies VAT by applying a sector-specific percentage to gross turnover instead of tracking individual input and output VAT. Often beneficial for businesses with minimal expenses. Available to businesses under £150,000 turnover. Sector rates range from 2% to 14.5%.

When does MTD VAT start after I register?

Immediately. Since April 2022, all newly VAT-registered businesses are automatically under MTD VAT. You need MTD-compatible software ready when your registration takes effect, not after your first return is due.

Should I worry about the threshold if I am at £70,000?

Start monitoring and preparing. At 15% growth you cross within 18 months. Set up MTD software, research VAT schemes, and get chartered accountant advice on timing. Preparation is dramatically easier than reactive registration under deadline pressure.

What VAT scheme options do I have when I register?

Standard Scheme (default), Flat Rate Scheme (simplified percentage), Cash Accounting Scheme (VAT on actual payments), and Annual Accounting Scheme (one annual return). Choice depends on business type, turnover, expense structure, and customer mix.

Does the threshold apply differently in Northern Ireland?

The threshold amount is the same (£90,000). However, Northern Ireland has different VAT rules for goods due to the Windsor Framework. Services follow UK-wide rules. Northern Ireland businesses selling goods may need additional compliance around EU Single Market access.

Can I control when I cross the threshold?

Legitimately: you can time invoicing to manage the month in which you cross. However, deliberately suppressing turnover (not declaring sales, splitting businesses artificially, delaying invoices beyond normal commercial terms) is tax fraud. The distinction is between legitimate timing and dishonest suppression.

Get VAT Threshold Advice – Free ICAEW Consultation

Whether you are approaching the £90,000 threshold, considering voluntary registration, or need to understand how MTD VAT applies once you register, getting chartered accountant advice BEFORE you cross the threshold saves time, money, and stress.

At MTD – Making Tax Digital (part of B1 Accountants), our ICAEW chartered accountants advise UK businesses on VAT registration and MTD compliance every day. We can:

•       Monitor your threshold position and advise on timing
•       Model whether voluntary registration benefits your specific business
•       Recommend the best VAT scheme (Standard, Flat Rate, Cash, Annual)
•       Set up MTD-compliant software before your registration takes effect
•       Handle VAT registration and MTD setup together
•       Provide ongoing MTD VAT compliance at fixed monthly fees from £40