What are seller fees at auction?
The term "seller fees" is misleading — these are fees that appear in the legal pack and are passed through to, or imposed directly on, the buyer. They take several forms:
- Buyer's premium / administration fee — a fee charged by the auction house payable by the winning bidder on top of the purchase price
- Seller's legal costs — a Special Condition requiring the buyer to pay the seller's conveyancing solicitor's fees on completion
- Seller's search fees — a requirement that the buyer reimburse the seller for the cost of the Local Authority Search, drainage search, and environmental search
- Reservation fee — used primarily in modern method auctions; a non-refundable fee paid to the auctioneer on agreeing to buy
The key point is that none of these appear in the advertised guide price or the lot description. They are in the legal pack — usually on page 1–5 of the Special Conditions — and they become legally binding the moment the hammer falls.
The two main auction models
Ballroom format (Allsop, Savills, Barnard Marcus, SDL, Bond Wolfe). Hammer falls = exchange of contracts. Buyer pays 10% deposit on the day. Completion typically 20–28 working days. Buyer's fee: usually £750–£2,000+VAT as an admin charge. Seller's legal costs: sometimes charged to buyer, sometimes not. Check the specific lot's special conditions.
Online format (iamsold, Bamboo Auctions, some SDL lots). Buyer pays a non-refundable reservation fee (£3,000–£8,000+VAT) on winning. Then has 28 days to exchange and 28 further days to complete. Buyer can withdraw (losing the reservation fee). This fee is the auction house's primary revenue source — it is always disclosed in special conditions but often missed.
Where to find seller fees in a legal pack
Seller fees and buyer charges are found in the Special Conditions of Sale — the most important document in any legal pack. Look specifically for:
- Clause 1 or Clause 2 — the first substantive clauses in most auction special conditions; often where buyer-pays-fees obligations are placed
- Any clause containing the words "administration fee", "buyer's premium", "buyer's fee", "reservation fee", or "auction house fee"
- Any clause containing the words "the buyer shall pay the seller's legal costs" — often stated as a fixed sum (e.g. £1,500+VAT) due on completion
- Addendum sheets — sometimes the fee schedule is on a separate page added to the special conditions by the auctioneer rather than the seller's solicitor
In addition to the special conditions, the auction house's general terms and conditions (often a separate document at the front of the legal pack) typically contain the administration fee applicable to all lots in that auction. Always read both.
A buyer at a regional auction wins a flat at £165,000. The guide price was £155,000–£165,000. The lot description made no mention of any buyer's fee. Special Condition 3 required the buyer to pay an administration fee of £4,200+VAT = £5,040 to the auction house on exchange. The buyer's total outlay on auction day: £16,500 (10% deposit) + £5,040 (administration fee) = £21,540. None of this was visible from the lot description.
Financial impact on buyers
The financial impact of buyer fees depends on the fee structure and the purchase price. On a £200,000 property:
- Buyer's premium at £4,200+VAT = £5,040 — added to the purchase price on the day
- Seller's legal costs at £1,500+VAT = £1,800 — payable on completion
- Search fees reimbursal: typically £200–£500
- Combined additional buyer cost: £7,000–£8,000 above the hammer price
For investors calculating yield or return, buyer fees must be included in the total acquisition cost — not treated as a separate or optional expense. On a £150,000 property yielding 7%, a £6,000 buyer fee reduces the effective yield from 7% to approximately 6.75% — a meaningful difference at scale.
For the LegalPack AI pricing comparison: at £9.99 per analysis (£429+VAT average for a solicitor review), knowing about a £5,040 buyer's premium before bidding — rather than after — saves not just the solicitor fee but a £5,040 bill you might otherwise have budgeted incorrectly around.
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Analyse your legal pack — first analysis freeFrequently asked questions
What is a buyer's premium at auction?
A buyer's premium is a fee charged to the winning bidder by the auction house, on top of the hammer price. It is disclosed in the Special Conditions of Sale. At traditional auctions it is typically £750–£2,000+VAT; at modern method auctions, £3,000–£8,000+VAT. It is not optional once you have won the lot.
Are auction fees negotiable?
No. Once the hammer falls, the contract is fixed on the terms in the legal pack. Special Conditions are contractually binding from that moment and cannot be renegotiated. Factor all fees into your maximum bid before you raise your paddle — not after.
Do all auction houses charge buyer's fees?
Not uniformly. Traditional ballroom auctioneers vary in their fee structures; some lots carry a buyer's administration fee, others don't. Modern method auctioneers almost always charge a reservation fee as their primary revenue model. The only way to know what applies to a specific lot is to read that lot's Special Conditions of Sale.
What is the modern method of auction?
The modern method (conditional auction) involves the buyer paying a non-refundable reservation fee (£3,000–£8,000+VAT) on winning, then having 28 days to exchange and 28 further days to complete. Unlike traditional unconditional auction, the buyer can withdraw (losing the reservation fee). It is common in residential estate agency-led auctions through platforms such as iamsold.
How do I find seller fees in an auction legal pack?
Check the Special Conditions of Sale — usually within the first 2–5 pages. Look for any clause requiring the buyer to pay an administration fee, buyer's premium, reservation fee, or the seller's legal costs. Also check any addendum sheets and the auctioneer's general terms. LegalPack AI extracts and highlights all buyer costs from the special conditions automatically.
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