When Should a New Limited Company Register for VAT? (2026/27 Timing Guide)
New limited companies don't have to wait until they hit the £90,000 threshold — registering early can be a smart move for some, a costly mistake for others. Here's how to think about the timing.
The threshold isn't the only decision point
Every new limited company must register for VAT once taxable turnover exceeds £90,000 in a rolling 12-month period (not a fixed tax year), or if turnover is expected to exceed that in the next 30 days alone. But the more useful question for many new companies isn't "when am I forced to register," it's "should I register voluntarily before I'm forced to."
VAT Calculator
Add or remove VAT from any amount. Supports 20%, 5% and 0% UK VAT rates.
Open VAT calculatorThe B2B case for early registration
If your customers are predominantly VAT-registered businesses, registering early is usually a clear win:
| Effect | Impact |
|---|---|
| You charge 20% VAT on sales | Your business customers simply reclaim it — no real cost to them |
| You reclaim VAT on your purchases | Genuine cash saving on equipment, software, professional fees, stock |
| You look more established | VAT number on invoices can support business credibility with larger clients |
Because your VAT-registered customers can reclaim the VAT you charge them, adding 20% to your invoice doesn't make you less competitive — it's cost-neutral to them, while you gain the ability to reclaim VAT on your own costs.
Worked example: consultancy with mostly B2B clients
| Item | Before registration | After voluntary registration |
|---|---|---|
| Invoice to client | £1,000 | £1,200 (£1,000 + 20% VAT) |
| Client's net cost (VAT reclaimed) | £1,000 | £1,000 |
| VAT you reclaim on laptop, software, office costs (say £3,000 spend) | £0 | £600 |
The client is indifferent (they reclaim the VAT either way), but you gain £600 of reclaimable input VAT that you'd otherwise have simply absorbed as an unregistered business.
The B2C case against early registration
If your customers are consumers or VAT-exempt businesses who cannot reclaim VAT, the calculus flips entirely:
| Effect | Impact |
|---|---|
| You charge 20% VAT on sales | Customer either pays 20% more, or you absorb it and cut your margin |
| You reclaim VAT on your purchases | Genuine saving, but often smaller than the extra VAT charged on sales |
| Unregistered competitors below the threshold | Can price 20% lower without registering |
Backdating VAT reclaims
One reason to consider registering slightly ahead of when you strictly need to is the ability to reclaim VAT on pre-registration costs, within limits:
| Cost type | How far back you can reclaim |
|---|---|
| Goods (still held or used by the business at registration) | Up to 4 years before registration date |
| Services | Up to 6 months before registration date |
This matters most for companies with significant upfront capital spend — equipment, stock, fit-out costs — where a meaningful chunk of VAT can be recovered even if you register some months after those costs were incurred, provided you retain valid VAT invoices.
Approaching the threshold: the 30-day forward test
The £90,000 threshold isn't purely backward-looking. You must also register if you expect your turnover in the next 30 days alone to exceed £90,000 — relevant for companies that win a single large contract or experience a sudden surge, even if their trailing 12-month turnover is still comfortably below the threshold.
| Test | Trigger |
|---|---|
| Backward-looking (rolling 12 months) | Taxable turnover exceeds £90,000 in any trailing 12-month window |
| Forward-looking (30-day test) | You expect to exceed £90,000 in the next 30 days alone |
Missing either trigger and registering late can result in HMRC penalties and a requirement to account for VAT retrospectively from when you should have registered — a cost you generally cannot recover from customers after the fact.
A simple decision framework
- Mostly B2B clients, especially larger or VAT-registered ones: consider registering early, potentially from incorporation.
- Mostly consumers or VAT-exempt clients (e.g. financial services, some education/health): stay unregistered until forced to by the threshold, unless there's a specific offsetting benefit (e.g. large reclaimable setup costs).
- Mixed customer base: model both scenarios against your actual revenue split before deciding, rather than defaulting to either extreme.
- Approaching £90,000 either way: register in good time — the administrative cost of being unexpectedly late is higher than registering slightly early.
Use our VAT calculator to model the impact of adding VAT to your specific pricing, and our corporation tax calculator to see the combined effect on your company's overall tax position.
Frequently asked questions
What is the VAT registration threshold for 2026/27?
The compulsory VAT registration threshold is £90,000 of taxable turnover in any rolling 12-month period, or if you expect to exceed £90,000 in the next 30 days alone.
Should a new limited company register for VAT immediately?
It depends on your customers. If you sell mainly to VAT-registered businesses that can reclaim the VAT you charge, early registration is usually beneficial because you can reclaim VAT on your own costs. If you sell mainly to the public or VAT-exempt businesses, early registration adds a real cost, since you can't pass the VAT charge through as easily.
Can I backdate my VAT registration to reclaim VAT on setup costs?
Yes, within limits. You can generally reclaim VAT on goods bought up to 4 years before registration (if still held/used by the business) and services received up to 6 months before registration, provided you have valid VAT invoices.
Does voluntary VAT registration make my company look bigger or more credible?
Many B2B clients and larger companies expect suppliers to be VAT registered as a marker of a properly established business, and a VAT number on invoices can support this perception, though it should not be the sole reason to register.
What happens if I register for VAT too early and my customers are all consumers?
You must add 20% VAT to your prices (or absorb it, cutting your margin), while an unregistered competitor doesn't have to. For consumer-facing businesses below the threshold, early registration can be a genuine competitive disadvantage.
Try the calculators
Related reading
Close Company Rules: What 'Participator' Means and Why It Matters (2026)
Most small UK limited companies are 'close companies' under HMRC's definition, which triggers specific tax rules on loans, benefits and distributions to shareholders. Here's what the label actually means.
Director's Loan Account S455 Charge: A Full Worked Example (2026/27)
If you owe your company money at year end and don't repay it within 9 months, your company pays a 33.75% S455 tax charge. Here's a complete worked example of how the numbers actually work.
Selling Your Company to an Employee Ownership Trust: The 0% CGT Relief (2026)
Selling a controlling stake in your company to an Employee Ownership Trust can be entirely free of capital gains tax for the seller. Here's how the relief works and what conditions must be met.