Auction purchases

VAT When Buying Commercial Property at Auction

PropertyVAT Team · Updated 20 October 2026 · 3 min read

Auctions compress every risk in a property transaction into a few seconds. The VAT position is the one most often left unchecked, and it is the one that can turn a good buy into a lost deposit.

Why auction is different

In a private treaty sale you exchange when you are ready. At auction, the contract forms when the hammer falls. There is no due diligence period afterwards, no renegotiation, and no route out that does not cost you the deposit.

Which means every VAT question has to be answered before you raise your hand:

• Has the seller opted to tax?
• Is the building new enough to be standard-rated regardless?
• Is TOGC treatment intended, and do you qualify?
• Are you VAT registered, today?

The completion squeeze

Auction contracts commonly require completion within a short fixed window — often around 28 days, though this varies and the auction conditions govern. Where VAT applies, that window has to absorb:

The deposit is at risk throughout. Failing to complete on time can mean forfeiting it, and the auction conditions may expose you to further liability beyond that.

Reading the legal pack for VAT

The legal pack is the authority. Not the catalogue entry, not the auctioneer's commentary, not the agent.

What to look for and ask:

1. The special conditions of sale. This is where VAT treatment is normally stated.
2. Evidence of any option to tax, including HMRC's acknowledgement — not just an assertion that one exists.
3. Whether the price is quoted inclusive or exclusive of VAT. An apparently cheap lot can be 20% more expensive than it looks.
4. Any TOGC provisions, and what the contract says if TOGC treatment fails.
5. Mixed-use allocation, where part of the property is residential and part commercial — the VAT treatment may differ across the parts.
6. Addenda issued late. Packs are updated, sometimes on the morning of the sale.

Have a solicitor review it. The cost of a legal pack review is trivial against the cost of a forfeited deposit.

Budgeting properly before you bid

Work out your true maximum bid on the VAT-inclusive basis:

• Hammer price
• Plus VAT at 20%, if it applies
• Plus SDLT calculated on the VAT-inclusive figure
• Plus buyer's premium, legal fees and searches

The stamp duty line is the one people forget. Because SDLT is charged on the VAT-inclusive consideration, VAT does not just create a temporary funding need — it permanently increases the tax you pay on the purchase.

Getting VAT registered before you bid

You cannot reclaim VAT you were not registered for at the point of purchase, and registration is not instant.

If you are buying through a newly formed SPV — which most auction buyers are — start the registration before the auction, not after you have won. The same applies to an option to tax where your TOGC depends on it. These are the two steps that most often turn a 28-day completion into a missed one.

Funding the VAT inside the window

Where the VAT is confirmed and your registration is in place, a VAT bridge can be arranged quickly — specialist lenders fund in as little as 48 hours — and is repaid from your HMRC reclaim.

The practical sequence that works:

1. Review the legal pack and confirm the VAT position before the auction.
2. Get VAT registration under way before you bid.
3. Have the VAT funding agreed in principle before the hammer falls.
4. Bid knowing your true all-in cost.

Arranged in that order, VAT is an administrative detail. Arranged in the reverse order, it is a reason deposits get lost.

This guide is general information, not tax or legal advice. Auction contracts and VAT treatment are specific to each lot — take advice on the legal pack before bidding.