Selling a House at Auction in the UK: What It Costs, How Fast It Is, and When the Tax Falls Due

Selling at auction gets you a binding sale on a fixed date. Completion usually follows 28 days later. On a £250,000 sale it costs you roughly £6,600 to £9,800 once the auction house, the entry fee and the legal pack are paid. That is more than a typical high street agent charges. What you buy with the difference is certainty. If your property is hard to mortgage, hard to value or hard to sell, that is a good trade. If it is a normal house in good order and you can wait for a buyer, it usually is not.

Auction is the one way of selling where the day you are taxed and the day you get paid reliably fall in different months. They can also fall in different tax years. Everything below follows from that.

Should you sell at auction? The short answer

Seven lines, and they decide whether the route is worth it. The fee figures come from the published seller guides named further down, all of them live in 2025 or 2026.

• Auctioneer's commission: around 2% to 3% plus VAT of the price you get, with a minimum fee from £1,500. You pay it only if the lot sells.
• Entry or catalogue fee: around £300 plus VAT or more. You pay this whether the lot sells or not, and it is often negotiable.
• Legal pack: £250 and above, paid to your solicitor up front. Add £200 or more if the property is leasehold.
• Deposit: 10% of the price, paid by the buyer on the day the hammer falls.
• Completion: usually within 28 days of the sale.
• Your one lever: the reserve. If bidding stops below it, the lot does not sell.
• Which tax year: fixed by the day the hammer falls, not by the day the money lands.

Auction suits a seller who needs a date more than a top price. That is a bigger group than it sounds. It covers probate sales with several people waiting, landlords getting out of a tenancy, owners of flats with short leases, houses no lender will touch, and anyone who has already had two buyers pull out.

It suits you badly if your house is an ordinary family home in decent order in a market with plenty of buyers. In that case the open market has more bidders than the room does, and you are paying a higher fee for a certainty you did not need.

How does selling at auction actually work?

The process is short and the order matters.

• You get a valuation and agree a guide price and a reserve with the auction house.
• You sign the auction agreement. The fees have to be in writing before you sign, so read them.
• Your solicitor builds the legal pack. This is the part that decides your price.
• The lot goes into the catalogue with its guide price and viewings run in blocks.
• On auction day the lot is knocked down to the highest bidder above your reserve.
• The buyer signs and pays a 10% deposit there and then.
• Completion follows, normally within 28 days, and the money reaches you through your solicitor.

One thing to be clear about before you go further. This page is about a traditional auction, where the contract is made in the room and completion runs 28 days. The modern method of auction is a different product with a longer timetable and a large buyer side fee, and it is covered in our guide to the modern method of auction. If an estate agent has offered you an auction, check which of the two you are being sold.

What does it cost you to sell at auction?

Three published seller guides give usable numbers. Auction Link, last updated on 17 August 2026, puts the auctioneer's commission at around 2% to 3% plus VAT with a minimum fee from £1,500, and the entry fee at around £300 plus VAT or more. The HomeOwners Alliance gives a second reading of around 2.5% of the price you get. Clive Emson Auctioneers, writing on 20 March 2025, puts legal pack preparation at £250 and above on its own guide, which also gives a wider market average of roughly £200 to £400, and more for leasehold.

Two points before the table. First, VAT is not a footnote for you. A private seller cannot reclaim it, so the figure that matters is always the one with VAT in it. A quote of 2% to 3% plus VAT is really 2.4% to 3.6% of your sale price. Second, the minimum fee bites on cheap lots. On a £60,000 terrace, 3% is £1,800, and on a £45,000 flat the percentage is beaten by the floor.

Cost item	Typical published cost on a £250,000 sale	Does it come off your gain?
Auctioneer's commission	£6,000 to £9,000 including VAT, from a range of 2% to 3% plus VAT with a minimum from £1,500 (Auction Link, 17 August 2026). A second published reading is around 2.5% (HomeOwners Alliance)	Yes. The auctioneer is named in the list of selling costs HMRC allows
Entry or catalogue fee	£360 including VAT, from around £300 plus VAT or more, and often negotiable (Auction Link, 17 August 2026)	Yes, as a cost of advertising the property to find a buyer
Legal pack, freehold	£250 and above on Clive Emson's own guide, which also gives a wider market average of roughly £200 to £400 (Clive Emson, 20 March 2025)	Yes, as a legal fee on the sale
Leasehold management pack	£200 or more on top (Auction Link, 17 August 2026)	Yes
Conveyancing on completion	Quoted by your solicitor. The auction guides used here publish no range for it	Yes
Energy performance certificate	Needed before marketing. No range published in the auction guides used here	Usually accepted as part of the cost of marketing the property, though HMRC's list does not name it
High street agent commission, for comparison	Not restated here. See what estate agents charge to sell a house	Yes
Total, auction fees only	£6,610 to £9,760 including VAT, before conveyancing	All of it

The van, the storage unit and the skip are not on that list, and neither is the early repayment charge on your mortgage. None of them touches the gain.

What you do not pay is as important. Clive Emson states that if the property does not sell you will not be expected to pay the commission. The entry fee and the legal work are already spent by then, so an unsold lot leaves you several hundred pounds down rather than several thousand.

How long does it take from instruction to money in the bank?

The two fixed points are the auction date and the 28 days after it. The HomeOwners Alliance describes a 10% deposit on the day, with the buyer having a month to hand over the other 90%. The auction firm iamsold puts it the same way, saying completion is generally expected within 28 days.

Everything before the catalogue deadline is the part you control. Get your solicitor started on the legal pack the day you decide, not the week the catalogue closes. For most sellers the whole route runs a couple of months from instruction to cleared funds, and almost none of that is spent waiting on a buyer to make up their mind.

Your buyer is often funding the 28 days with short term finance rather than a normal mortgage. That is worth knowing, because it is why the deadline is realistic at all. The buyer's side of the same room is covered in bridging finance for auction purchases.

Are you bound the moment the hammer falls?

Yes, and so is the buyer. A sale of land normally needs a signed written contract before anyone is committed. A sale made at a public auction is the exception the law carves out, so the contract is made in the room when the hammer comes down.

What that means in practice is the whole reason people choose this route. There is no exchange to wait for. There is no cooling off period. The buyer cannot come back a fortnight later and knock £10,000 off the price. If you have already been let down by a private buyer, that certainty is the product you are paying the higher fee for.

It cuts both ways. Once you have agreed the reserve and the lot is knocked down above it, you are selling. If a better private offer arrives while your lot is in the catalogue, pulling out costs you a withdrawal fee on top of the money already spent. Ask what that fee is before you sign, not after.

If the winning bidder fails to complete, their 10% deposit is at risk and the conditions of sale in your legal pack decide what happens next. Have your solicitor read those default terms early. There is a tax point buried there too: if you keep a forfeited deposit, that money is taxable in its own right rather than a free windfall.

Do houses really sell for less at auction?

You will find plenty of pages telling you the auction discount is 10%, or 20%, or some other round number. None of them shows where the figure came from, and we are not going to add another one.

The honest answer is that the discount depends on the lot, and that you control the floor. Your reserve is the price below which the sale does not happen. Set it at a level you can live with and the worst outcome is an unsold lot, not a giveaway. That is a very different risk from the one the folklore describes.

The auction houses publish the opposite claim, and it deserves an airing. Clive Emson, writing on 15 September 2025, says UK properties can achieve upwards of 110% of their market value at auction, and that roughly 80% of properties sell at their first auction at or above the reserve. Treat that as an auctioneer describing its own market, but it is published, dated and checkable, which is more than the discount folklore manages.

A discount is real when the room is thin. Expect less than an open market buyer would pay in six cases. A short lease. A structural problem. A tenant with a poor payment record. A title defect. A thin legal pack. Or a lot with only one plausible type of buyer. In each of those cases the high street was never going to pay full value either, because the buyer who would have paid it cannot get a mortgage on it.

Which properties do better at auction than with an agent?

The pattern is consistent. Auction wins where an ordinary buyer with an ordinary mortgage cannot play.

• Properties no mainstream lender will lend on: no kitchen or bathroom, serious damp, subsidence, non standard construction.
• Flats with short leases, where the cost of extending is the real subject of the negotiation.
• Tenanted houses and small blocks, where the buyer wants income from day one.
• Probate and empty properties that have not been touched for years.
• Anything with a development angle: plots, garages, part converted buildings, unusual commercial to residential lots.
• Any sale where several people have to agree and a fixed date is worth more than the last few thousand pounds.

Auction loses where the property is easy. A tidy three bedroom semi in a popular street will find more competing buyers over six weeks on the open market than in a room on one afternoon. It will also cost you less in fees to get there.

Why does a thin legal pack cost you more than any fee?

The legal pack is the bundle your solicitor prepares before the catalogue goes out: title documents, searches, the conditions of sale, the lease and management information if it is leasehold, and any tenancy paperwork.

Bidders read it, or their solicitors do, and they read it before the sale rather than after. Anything missing gets priced as risk. A gap in the building regulations paperwork does not cost you what the paperwork costs. It costs you what a cautious bidder deducts for not knowing, and that number is always bigger.

So the order of spending matters. Paying £250 to £400 for a complete pack, and a few hundred more to chase a missing certificate, is the highest return available to you anywhere in this process. Getting the pack out late, or with holes in it, is how sellers actually lose money at auction.

What must an auction house put in writing before you enter a lot?

More than most sellers realise, and the rules are on your side here.

The auction house has to tell you in writing what you will pay, when it becomes payable and what else you might be charged, and it has to do that before you sign. If it does not, the agreement is not enforceable against you without a court order. That is real leverage, so get the fee terms on paper and keep them.

An auction house selling your property is doing estate agency work, which surprises most sellers. So check it is in an approved redress scheme before you instruct, and our guide to the cheapest estate agent fees explains why that check matters most at the budget end.

Guide prices are covered too. The consumer rules were replaced in April 2025. The new list of banned practices includes advertising something at a price the auction house knows it cannot be sold at. It also bans manufactured urgency designed to make you decide on the spot. If a firm pushes a guide price it privately admits is unachievable, that is a Trading Standards matter, not a style of salesmanship.

Four things to ask for before you sign, in these words. Give me the commission as a percentage including VAT. Confirm the minimum fee in writing. Can the entry fee be deferred until completion, as some firms allow? And what exactly does it cost me to withdraw the lot?

Capital gains tax on an auction sale: what comes off, and which tax year

If the property has been your only home throughout, this section will not apply to you and the sale is normally free of the tax. It matters for the three sellers who actually turn up at auction with a taxable gain: the landlord, the second home owner, and the family selling an inherited house.

Start with the good news. Your auction costs come off the gain. Say the hammer falls at £250,000 on a flat you let out, you paid £190,000 for it, and your auction and legal costs are about £7,000. You are taxed on £53,000, not on £60,000. The fees do real work, so keep every invoice.

Now the date, which is where auction differs from every other route. Your sale happens for tax purposes on the day the hammer falls, not on the day the money arrives. Say the hammer falls on 30 March and you complete on 27 April. The gain belongs to the tax year that ended on 5 April, and it uses that year's allowance and that year's losses. The deadline for reporting and paying works the other way round: that clock runs from completion, so it starts on 27 April and gives you 60 days.

An auction in late March or early April therefore needs both dates in your diary the moment the lot sells. The mechanics of the bill itself, whoever you sell through, are in our complete guide to capital gains tax on property.

If you inherited the property, your starting value is normally what it was worth on the date of death rather than what the person who died paid for it. That often leaves a small gain or none at all. The process has its own traps, and they are covered in selling a probate property.

Before you instruct anyone, put your own numbers through the cost of selling calculator. It prices your auction fees and what you would keep, in under a minute. For the same numbers across every route, start with our guide to the cost of selling a property. Then ask two auction houses for their fee terms in writing, and compare them line by line before you sign either.

The fee figures on this page come from four published guides. Auction Link on auction fees for selling property, last updated 17 August 2026. Clive Emson Auctioneers on the cost of selling at auction, 20 March 2025, and Clive Emson on whether property sells for less at auction, 15 September 2025. The HomeOwners Alliance guide to selling a house at auction. And iamsold's property auction FAQs.