For the 2026/27 tax year, the VAT threshold remains £90,000 of taxable turnover in any rolling 12-month period. Once you exceed this amount, you must notify HMRC within 30 days and your registration will generally take effect from the first day of the second month after the breach. The threshold has been frozen since 1 April 2024, when it rose from £85,000, and the government confirmed in the 2025 Budget that there will be no increase to the HMRC VAT registration threshold for 2026/27.
According to HMRC, hundreds of thousands of UK businesses sit just below the VAT at any given time and a significant proportion cross it without realising until weeks or months later. Most business owners don’t deliberately delay; they simply become engrossed in running the business and miss the moment they exceeded the limit.
This guide explains how the VAT threshold works, what counts towards it, when you need to register for VAT, and why voluntary VAT registration can sometimes be the smarter option even before you’re legally required to act.
Key Takeaways
- The mandatory VAT registration threshold for 2026/27 is £90,000 of turnover, calculated over a rolling 12-month period rather than your tax year, accounting year, or calendar year.
- The VAT threshold for deregistration is set at £88,000.
- You need to calculate the rolling turnover at the end of each month and not only once a year.
- In case of exceeding the VAT limit, you need to inform HMRC within 30 days; the actual VAT registration date will be considered as the first day of the second month after the breach.
- There is an additional “forward look” test: in case of a reasonable expectation of exceeding the VAT threshold within the next 30 days (because of a big contract, for instance), you need to register for VAT.
- Delay in VAT registration may result in the backdated VAT registration; in such a case, you have to pay VAT for the transactions where you didn’t charge it.
- Value Added Tax voluntary registration below the threshold can be advantageous from a commercial perspective.
What Counts Toward the VAT Threshold?
The VAT threshold is based on taxable turnover your gross sales income before expenses. Many business owners mistakenly assume the VAT relates to profit or to money in the bank. It does not.
Taxable turnover includes standard-rated, reduced-rated, and zero-rated supplies. It does not include VAT-exempt income. You can check which supplies are exempt on HMRC’s official VAT guidance page.
According to HMRC statistics, as of 2024 there were approximately 4.2 million VAT-registered businesses in the UK, yet an estimated 400,000+ businesses trade close to the VAT threshold without crossing it. Of those that do cross it, a significant share does so unknowingly, resulting in backdated liabilities.
The Current VAT Registration Threshold: How It Works
For the 2026/27 tax year, the compulsory VAT registration threshold remains:
£90,000 of taxable turnover in any rolling 12-month period.
This is where many business owners become confused.
The threshold is not:
- £90,000 in your accounting year
- £90,000 in a calendar year
- £90,000 in a tax year
Instead, it is measured continuously.
Every month, you must look backwards over the previous 12 months and calculate your total taxable turnover. If that figure exceeds £90,000, you are normally required to register for VAT.
These catches people out far more often than you might think.
Why Businesses Miss the VAT Threshold
Most late VAT registrations aren’t deliberate avoidance. They stem from predictable misunderstandings:
Mistake 1: Focusing on profit, not turnover, the threshold is based on gross taxable sales, not what’s left after costs. A business turning over £100,000 with slim margins still needs to register for VAT.
Mistake 2: Measuring the wrong period, your accounting year-end is irrelevant for HMRC VAT registration purposes. The rolling 12-month test applies regardless of when your financial year closes.
Mistake 3: Assuming sales will slow, waiting to see whether turnover drops before notifying HMRC can result in a missed registration deadline if the VAT has already been crossed.
Mistake 4: Waiting for annual accounts. By the time your accountant finalises the year-end figures, the threshold may have been exceeded months ago. Monthly monitoring is essential. CCM includes turnover tracking within its bookkeeping packages precisely to catch breaches early.
How and When to Register Once You’ve Exceeded the VAT Threshold
Once your rolling taxable turnover exceeds the VAT threshold, the process is as follows:
- At the end of each calendar month, assess your 12-month rolling turnover.
- If it exceeds £90,000, notify HMRC within 30 days of the end of that month.
- Your VAT registration becomes effective from the first day of the second month after the breach.
You can register for VAT directly via HMRC’s online VAT registration service. Most registrations are completed online within a few days, though HMRC advises allowing up to 30 working days in some cases.
Example:
- Rolling turnover for the 12 months ending 31 August exceeds the VAT registration threshold → notify HMRC by 30 September → VAT registration effective from 1 October.
What Happens If You Miss the Deadline?
If you miss the VAT registration deadline:
- HMRC can backdate your value-added tax registration to the date you should have registered.
- You may owe VAT on past sales, even if you never charged customers VAT at the time.
- Interest and penalties apply on top of the unpaid VAT see HMRC’s penalty regime for late VAT registration.
For example: a consultant exceeds the VAT threshold but continues trading for six months without registering, generating £30,000 in sales. HMRC may require VAT to be paid on those invoices. Since customers have already paid without VAT, the business absorbs the cost itself — often a painful and entirely avoidable outcome.
A Real-World Example: The High Street Retailer
Picture a local retailer in Rochdale whose sales climb steadily as new product lines and social media drive growth. Nobody is tracking the VAT threshold month by month. Six months later, the business discovers it crossed the £90,000 mark some time ago.
Because retail customers are typically consumers rather than VAT-registered businesses, prices can’t realistically be increased retroactively. The owner effectively absorbs the VAT bill personally funds that could otherwise have been reinvested in stock, staff, or growth.
Voluntary VAT Registration: When It Makes Sense
Voluntary value added tax registration is permitted before the VAT registration threshold is reached. It can be commercially beneficial in several scenarios:
B2B services: If your customers are VAT-registered businesses, they can reclaim the VAT you charge. Voluntary VAT registration ahead of the VAT threshold often has minimal competitive impact.
Significant input VAT: Businesses purchasing equipment, machinery, or technology can reclaim input VAT through HMRC VAT registration, rather than absorbing it as a cost.
Professional credibility: VAT registration signals an established, larger operation which can matter in competitive B2B markets.
Planning for growth: Registering before the VAT threshold is reached gives you time to set up systems, train staff, and adjust pricing before the pressure of a legal deadline.
You can check the current rules on voluntary VAT registration at HMRC’s guidance page.
Cash Flow and the VAT Threshold: A Critical Warning
Crossing the VAT threshold effectively turns your business into a tax collector for HMRC. You must charge VAT on sales, hold it on behalf of the government, and pay it over via your VAT returns, typically quarterly. One of the most dangerous mistakes businesses make after HMRC VAT registration is treating collected VAT as available cash.
Spending it on payroll, stock, or overheads and then facing a substantial VAT bill is a recognised pattern that leads to serious cash flow problems. CCM’s clients typically set up a dedicated VAT holding account from day one of VAT registration. This removes most of the risk by keeping tax funds clearly separated.
Pricing Implications After the VAT Threshold
Crossing the VAT threshold affects pricing strategy, particularly for consumer-facing businesses:
- Businesses selling mainly to consumers may need to absorb or pass on a 20% price increase, which can affect competitiveness.
- Businesses selling to VAT-registered clients are usually less affected, since those customers can reclaim VAT.
Before VAT registration takes effect, it is worth modelling the impact on margins, reviewing pricing, and deciding how to communicate any changes to customers. Early planning makes this manageable; last-minute adjustment makes it stressful.
Making Tax Digital and Record-Keeping Requirements
Most businesses that exceed the VAT registration threshold must also comply with Making Tax Digital (MTD) for VAT. This requires:
- Maintaining digital accounting records
- Using MTD-compatible software
- Submitting VAT returns electronically
HMRC’s own figures show that 97% of VAT returns are now submitted via MTD-compatible software, and businesses using digital tools report significantly fewer filing errors. Platforms such as Xero, FreeAgent, and QuickBooks have made compliance straightforward, automating much of the process. CCM is a certified partner for all three and can have your MTD-compliant setup running within days of VAT registration.
Does VAT Hurt Profitability?
Not necessarily. In most cases, value added tax is not a direct cost to your business it is collected from customers and passed to HMRC. However, the VAT threshold can affect the bottom line when:
- Customers cannot reclaim VAT (particularly end consumers)
- A price increase isn’t commercially viable due to competition
- Margins are already tight
Understanding the likely effect before VAT registration takes place rather than after gives you time to adapt.
Preparing for the VAT Threshold: A Practical Checklist
- Monitor turnover monthly: don’t wait until year-end to assess your position against the VAT registration threshold.
- Review your pricing strategy: understand how registration will affect customers and margins.
- Set up digital record-keeping: MTD compliance must be in place at VAT registration.
- Open a VAT holding account: never treat VAT receipts as operating cash.
- Seek early advice: VAT threshold issues are far easier to manage before the limit is reached than after.
If you’re unsure where you stand relative to, use HMRC’s VAT registration checker tool as a starting point.
The Bigger Picture: What Approaching the VAT Threshold Tells You
Reaching the VAT threshold often signals a wider transition for a growing business. It tends to prompt broader questions:
- Do we need better management accounts?
- Is our bookkeeping still adequate for our scale?
- Are we structured correctly sole trader, partnership, or limited company?
- Should we be employing staff?
- Do we need better financial systems?
Reaching the VAT threshold is often the first real sign a business has moved beyond the start-up phase less about survival, more about building something sustainable. VAT registration is not a punishment for success; it is a natural milestone. The real risk isn’t the tax itself it is drifting into registration accidentally, unprepared, and dealing with the consequences without a plan.
Final Thought
VAT registration is a natural step as a business grows, not a penalty for being successful. The real challenge is unintentionally crossing the threshold and managing the consequences afterwards without the preparation or awareness that turns a potential problem into a straightforward administrative step.
With proper monitoring and forward planning, value added tax obligations are manageable and predictable. At Carter Collins & Myer, we help businesses across Rochdale and beyond stay ahead of the VAT threshold, understand the commercial impact of registration, and avoid costly surprises through proactive tax planning and clear, jargon-free financial guidance.
If you’re approaching £90,000 in taxable turnover, get in touch with our team before HMRC’s deadline gets in touch with you.