VAT registration for UK Airbnb hosts: the £90,000 threshold and what I track monthly to stay the right side of it

Nobody tells you about VAT when you're setting up your first Airbnb. You're thinking about duvets, photographs, whether your WiFi speed is going to generate a complaint. VAT feels like something that happens to proper businesses, not someone renting out two flats in Brighton and a cottage in the Lakes.

Then you have a good year. And another one. And suddenly you're doing the sums in February and realising you might need to have a slightly anxious conversation with your accountant.

Here's what I know now that I didn't know then.

The threshold: £90,000

The current UK VAT registration threshold is £90,000 in taxable turnover over any rolling 12-month period. Not a tax year — a rolling 12 months. That's the bit most people miss. You don't get to start the clock again in April.

If your total taxable turnover for the last 12 months exceeds £90,000, you must register for VAT within 30 days of the end of the month in which you crossed it. Your effective registration date is the first day of the second month after you crossed the threshold. If you expect to exceed £90,000 in the next 30 days alone, you have to register by the end of that 30-day window, with your effective date being the day you realised you'd cross it — not the day you actually did. That's the sharper rule, and it's the one that catches people who have a sudden run of bookings.

This was confirmed on GOV.UK: when total taxable turnover for the last 12 months goes over £90,000, or when you expect turnover to go over £90,000 in the next 30 days, registration is mandatory.

Does STR income count as taxable turnover?

Yes. Short-term let rental income is standard-rated for VAT purposes. This is different from long-term residential lettings, which are exempt from VAT. If you're letting a property for less than 28 days (broadly speaking), it's treated as a short-term letting and falls within the scope of VAT.

Cleaning fees, damage waiver fees, pet fees — all of it counts toward your taxable turnover. The cleaning fee you charge on Airbnb isn't a separate line that disappears from the calculation. If it goes through your account as income related to the letting, HMRC's view is that it's part of the supply.

There are some nuances around platform fees and what Airbnb actually remits to you versus what the guest pays. But the safest approach — and the one my accountant uses — is to count the gross nightly rate plus any fees as your turnover, not the net amount after Airbnb's host service fee. Talk to your accountant about this specifically. The exposure if you've been undercounting is not trivial.

What I actually track

I have a spreadsheet — yes, one of the last spreadsheets I maintain — with a running 12-month total updated after every payout. It's not complicated: date, property, gross payout from Airbnb, gross payout from Vrbo, any direct booking income. Sum at the bottom. I look at it once a month.

The reason I don't use Hoststock or any of my other tools for this specific number is that I want it completely separate and clearly attributable if I ever need to show my workings to HMRC. Nothing fancy. Just a clear, auditable running total.

When I hit £75,000 in any rolling 12 months, I flag it to my accountant. When I hit £80,000, we have a conversation. Not because I'm panicking — because at that point we start making decisions about whether to register voluntarily (useful if you have significant VAT-ratable expenses), or whether to restructure to keep individual properties below the threshold if I can do that legitimately.

The voluntary registration question

You can register for VAT voluntarily even if you're below the £90,000 threshold. There are situations where this makes sense — particularly if you're spending a lot on refurbishment, new furnishings, or equipment where you'd be charged VAT and could reclaim it. The input tax recovery can be significant on a property fit-out.

The downside is the admin burden and the fact that you'd have to charge VAT on your accommodation, which means either absorbing the cost or raising your rates. For most hosts in the sub-£90k range, voluntary registration isn't worth it. But if you're scaling up, it's worth a conversation with your accountant before you hit the mandatory threshold.

What happens if you miss it

This is where it gets uncomfortable. If HMRC determines that you should have been VAT registered and weren't, you become liable for the VAT that should have been charged on past sales — even if you didn't collect it from guests. That means the VAT comes out of your received income retroactively. On a portfolio doing £95k a year, the exposure for a year of non-registration is around £15,800 (at the 20% standard rate on the income above the threshold), plus interest and potentially penalties.

HMRC also charges a default surcharge or, under the newer penalty regime, daily penalties for late registration. It compounds. The window between crossing the threshold and realising you need to register is where people get hurt.

A few things I got wrong early on

I thought cleaning income didn't count. It does. I thought I could look at net income after platform fees. I can't, really — gross is safer. I thought the threshold reset annually in April. It doesn't — it's rolling 12 months, always.

The other thing I initially underestimated was how quickly a multi-property portfolio tips over £90k. When you're running one flat at £150 a night with 65% occupancy, that's around £35k a year. Add a second similar property: £70k. A third, slightly smaller: you're at £100k before you've noticed. Three properties can get you to mandatory VAT registration faster than you think, especially if you're in a premium market like Edinburgh Old Town or central Brighton.

The practical upshot

Track your rolling 12-month gross turnover. Not annually, not quarterly — monthly, after every payout run. Set your own alarm at £80k and make sure your accountant is in the loop before you hit £85k. Don't confuse STR income with long-term residential lettings in your maths — they're taxed differently and the VAT treatment is different.

If you're already over £90k and haven't registered: get advice today, not next week. The longer you leave it, the worse the exposure. HMRC's VAT registration helpline is 0300 200 3700. Your accountant will tell you to call them, and they're right.

I'm not an accountant. This isn't advice — it's what I've learned from managing five properties and having enough expensive conversations with my own accountant to know which questions to ask. Verify everything specific to your situation before acting on it.