What is the penalty for late VAT registration?

If your taxable turnover passed the VAT registration threshold and you didn't register on time, HMRC treats this as a failure to notify.

It can then backdate your registration to the date you should have registered, charge VAT on sales from that date, and add a penalty on top calculated as a percentage of the VAT that went unpaid because you registered late.

How much you pay depends on why the registration was late, whether you told HMRC yourself or it was found in a check, and how quickly you cooperated once it came to light.

Schedule 1 VATA 1994 requires you to register within 30 days of the end of the month you exceed the rolling 12-month taxable turnover threshold. Check the current threshold on GOV.UK, as it can change.

Schedule 41 Finance Act 2008 sets the penalty regime for failing to notify HMRC of a liability to register. The penalty is a percentage of the potential lost revenue, the VAT that should have been paid over the period of the failure.

The percentage scales with behaviour: non-deliberate failures carry the lowest range, deliberate and concealed failures the highest. Unprompted disclosure, telling HMRC before it starts asking, reduces the penalty further than a prompted disclosure made after HMRC has already flagged the issue.

Once backdated, you're liable for VAT on sales made since the date you should have registered, even if you didn't charge customers VAT at the time. Recovering that from customers retrospectively is often impractical.

You may also be entitled to reclaim input tax on business costs from the same backdated period, which can offset some of the liability, provided you have the evidence.

Directors should monitor rolling 12-month turnover regularly, not just at year end, because the threshold is tested on a rolling basis and can be crossed mid-year without warning.

The core cost is the backdated VAT itself, plus the failure to notify penalty, plus interest on the late-paid tax calculated by reference to the Bank of England base rate.

Genuine reasonable excuse can remove the penalty entirely if you correct the position without unreasonable delay once the excuse ends, but HMRC applies this test narrowly.

Growth plan clients get free tax investigation insurance included, which can cover professional costs of dealing with a failure to notify check. See /fees for plan comparisons.

Don't wait for HMRC to write to you. Registering voluntarily as soon as you spot the problem attracts a lower unprompted penalty, or none at all with a reasonable excuse.

Don't assume the threshold only matters at your accounting year end; it's tested on a rolling basis across any 12 months.

Don't forget to claim input tax you're entitled to for the backdated period; many directors focus only on the liability and miss the offsetting relief.