Register for VAT
You must register within 30 days of the end of the month in which your taxable turnover in any rolling twelve months went over £90,000, or as soon as you expect it to in the next 30 days alone.
Is this you?
Any business approaching £90,000 of taxable sales in a twelve-month window. The window rolls, so this is not a tax-year test.
The detail
Registration takes effect from the first day of the second month after you went over, and VAT is due on sales from that date whether or not you charged it. Businesses can also register voluntarily below the threshold, which is often worth it when most customers are VAT-registered.
What it costs
A penalty based on the VAT that should have been charged between the date you should have registered and the date you did, plus the VAT itself. Source: gov.uk and Companies House guidance, checked September 2026.
Now
Watch the rolling twelve-month figure every month once sales pass about £75,000. The VAT calculator shows where you stand.
In the same area
- Depends on your datesVAT return and paymentVATDetails
