UK VAT registration: thresholds, timing and choosing a scheme

The two registration tests

The backward-looking test applies when your taxable turnover over any rolling twelve months exceeds the registration threshold. You must notify HMRC within thirty days of the end of that month, and registration takes effect from the first day of the second month after you crossed it.

The forward-looking test applies when you expect taxable turnover to exceed the threshold in the next thirty days alone — for example, on winning a single large contract. Here registration takes effect immediately, from the date the expectation arose.

Choosing a scheme

The standard scheme reclaims input tax on purchases and accounts for output tax on invoices raised. It suits businesses with meaningful VAT-bearing costs.

The flat rate scheme applies a single percentage to gross turnover and generally blocks input tax recovery. It reduces admin, but the limited cost trader rules make it unattractive for many service businesses.

Cash accounting shifts the VAT point to when money moves, which protects cash flow if customers pay slowly and removes exposure to bad debts. Annual accounting reduces filings to one return with interim payments on account.

• High VAT-bearing costs — standard scheme is usually best
• Slow-paying customers — consider cash accounting
• Low costs, simple admin needs — model the flat rate scheme carefully

Voluntary registration

If you sell mainly to VAT-registered businesses, registering voluntarily lets you recover input tax without making your prices effectively higher to your customers. If you sell to consumers, registration is a real price increase or a real margin reduction.

Model both scenarios on your actual sales mix before deciding — the answer is rarely obvious from turnover alone.