Modern Method of Auction: The Truth and Facts

The Modern Method of Auction is a conditional online auction. The winning bidder pays a non-refundable reservation fee — typically 4.5% plus VAT, subject to a minimum of around £6,000 — then has roughly 56 days to exchange and complete. It is faster and more binding than a normal estate agency sale, and slower and less binding than a traditional auction. The critical fact for sellers: although the buyer hands over the fee, buyers bid with their total budget in mind, so the fee comes out of what you receive. The Property Ombudsman named it a growing source of complaints in 2026.

What it is, stripped of the marketing

A traditional auction is unconditional. The hammer falls, contracts exchange there and then, the buyer pays 10% and completes in 28 days. If they walk, they lose the deposit and can be sued for the balance. Brutal, but unambiguous.

The Modern Method is different in one structural way: nothing exchanges on the day. The winning bidder signs a reservation agreement and pays a reservation fee, usually within two hours of the auction closing. That fee buys them an exclusivity period — commonly 28 days to exchange and a further 28 to complete. Contracts exchange in the normal way, at the normal point, with the normal solicitors.

Which means the buyer is committed financially but not legally bound to buy. If they pull out, they lose the fee. You keep the property and start again.

The extended timeline is also the point. A traditional auction's 28 days effectively excludes anyone needing a mortgage, so bidding is limited to cash investors. Fifty-six days is enough for most residential mortgage offers, which opens the property to ordinary buyers. On the right property, that widening of the pool is worth real money.

The timeline, step by step

Stage	Typical timing	What happens
Valuation and reserve set	Week 0	You agree a guide price and a confidential reserve. The guide is marketing; the reserve is your floor.
Legal pack prepared	Week 0–2	Title, searches, leasehold documents. Buyers usually contribute around £300 including VAT towards the pack.
Marketing period	2–4 weeks	Listed on the portals with viewings, exactly like an agency sale.
Bidding window	Usually 3–30 days	Online, with an anti-sniping extension that pushes the end time out if a late bid lands.
Reservation	Within ~2 hours of close	Winner pays the reservation fee and signs the reservation agreement.
Exchange	~28 days	Buyer's mortgage, survey and enquiries completed.
Completion	~28 days after exchange	Total from reservation: about 56 days.

Front to back, allow 10 to 14 weeks from instruction to money in the bank. That is meaningfully quicker than the 16 to 24 weeks a private treaty sale typically takes, and Zoopla's July 2026 figures put listing-to-completion at 5 to 6 months nationally. It is considerably slower than the 7 to 28 days a funded cash house buyer works to.

The fee, and the sum nobody shows you

Here is where sellers get caught out. The standard pitch is "it costs you nothing — the buyer pays the fee". Technically true. Economically, no.

Buyers do not budget for a purchase price. They budget for a total. Someone with £215,000 available for a house, all in, works backwards from that figure. So consider a property that would fetch £215,000 on the open market, listed via MMoA with a 4.5% + VAT reservation fee.

	Private treaty sale	Modern Method of Auction
Buyer's total budget	£215,000	£215,000
Reservation fee (5.4% of price)	£0	£11,016
Price the buyer can bid	£215,000	£203,984
Agent commission (1.3% + VAT)	−£3,354	£0
Gross to you	£211,646	£203,984
Buyer's SDLT charged on	£215,000	£215,000 (price + fee)

The seller is £7,662 worse off, and the buyer is no better off. The fee did not come from nowhere — it came out of the price. That last row matters too: HMRC treats the reservation fee as part of the chargeable consideration, so a buyer paying £204,000 plus an £11,016 fee is assessed for stamp duty on £215,016. Plenty of buyers only discover this when their solicitor raises it, and it is one of the reasons late-stage MMoA sales collapse.

The minimum fee is where it gets genuinely unfair. A £6,000 floor is 2.8% on a £215,000 house. On a £90,000 ex-local-authority flat in County Durham it is 6.7%. The lower the value of the property, the harder the model bites — and low-value stock is precisely what gets steered into auction most often.

So who actually pays?

You do, in almost every case, in the form of a suppressed price. The fee is a transfer from the seller's proceeds to the auction provider, routed through the buyer's cheque book so that it never appears on your completion statement.

That is not automatically a scandal. An agent charges 1.3% plus VAT and nobody calls it a scam. The problem is presentation. A commission is disclosed, comparable and negotiable. A reservation fee is described as costing you nothing, is rarely negotiable, and is roughly four times the size.

Two things to check before you sign anything:

• Is there a seller fee as well? Some providers charge the buyer only. Others charge both, or charge the seller a lower commission plus a buyer fee. Get the total cost of sale, both sides, in writing.
• How is your commission calculated? If a seller-side fee is a percentage, ask whether it is applied to the price alone or to the price plus reservation fee. It should be the price alone.

What The Property Ombudsman found

This is the part of the story that changed in 2026. The Property Ombudsman reported that property auctions account for roughly 2% of home sales but generated more than four times their share of complaints — 5% of all complaints received, and 9% of all residential sales complaints, with over 300 auction cases resolved in the year. Buyers and prospective buyers made up 68% of them.

The Ombudsman singled out the Modern Method specifically, on the grounds that it can look like a normal agency sale while operating on entirely different fees, deadlines and commitment points. Reservation fees were flagged as a high-risk consumer issue in their own right, with recurring complaints from buyers who believed the fee would be deducted from the purchase price, or refunded if the sale fell through, or who said it had never been clearly explained. Propertymark has made similar noises about consumer education as auction volumes have grown.

For a seller, the practical read-across is this: if your buyer misunderstood the fee, your sale is at elevated risk of collapsing at the point they find out. Ask your provider directly how the fee is explained to bidders, and in what format, before the bidding opens.

How MMoA arrived, and why it is everywhere now

Conditional auction is not new, but its share of residential listings has grown sharply over the past decade, and the reason is commercial rather than consumer-led. High street agency margins have been squeezed by online competitors, and a buyer-funded fee of 4.5% plus VAT is a far richer piece of business than 1.3% seller commission. Many high street brands now offer MMoA through a white-labelled partnership with a national auction provider, which is why the house you are selling can be presented to you as "our auction service" when the auction is run by a company you have never heard of.

There is nothing improper about that arrangement, provided it is disclosed. Ask which company actually runs the auction, whether your agent receives a referral payment or a share of the reservation fee, and how much. You are entitled to know, and the answer tells you why the route was recommended.

The things that go wrong, in order of frequency

Sales fail in patterns. These are the ones we see most.

• The buyer discovers the SDLT treatment late. Their solicitor explains that stamp duty is charged on the price plus the fee. On a purchase near a threshold, that can tip them into a higher band and blow up the affordability calculation.
• The mortgage valuation comes in below the bid. Auction competition can push a price above what a surveyor will support. The lender reduces the advance, the buyer cannot bridge the gap, and the 28-day exchange window runs out.
• The legal pack contains a surprise. A restrictive covenant, an absent freeholder, a shared access with no maintenance agreement. Buyers who bid without reading the pack — and many do — pull out when their solicitor reports.
• Leasehold documentation stalls. A managing agent taking six weeks to produce a management pack will destroy a 56-day timetable on its own. If you are selling a flat, order the pack the day you instruct.
• The buyer simply cannot raise the fee. Some bidders do not appreciate that the fee is payable within about two hours of the auction closing, in addition to their deposit. The reservation fails and the property goes back to the underbidder, usually at a lower figure.

Four of those five are preventable by preparing the legal pack properly before marketing starts, and by insisting the provider confirms in writing how the fee and its tax treatment are disclosed to bidders. Do that work up front and the model performs far closer to how it is sold.

The honest balance sheet

How the four routes compare

	Traditional auction	Modern Method	Estate agent	Cash buyer
Binding at	Fall of the hammer	Reservation agreement	Exchange of contracts	Exchange of contracts
Time to completion	~28 days	~56 days	16–24 weeks	7–28 days
Mortgage buyers	Effectively excluded	Yes	Yes	N/A
Who pays the cost	Seller commission + buyer fees	Buyer fee, borne by the price	Seller commission	Nobody — buyer covers legals
Typical cost of sale	2–3% + VAT	4.5% + VAT (min ~£6,000)	1–1.8% + VAT	£0
Price achieved	Variable, often below market	Market, less the fee effect	Highest, if it completes	75–85% of market value
Fall-through risk	Very low	Low to moderate	Roughly 1 in 4	Low with a funded buyer

When the Modern Method is genuinely the right call

It has a real place, and dismissing it wholesale would be as dishonest as the "costs you nothing" pitch. Consider it seriously if:

• Nobody can confidently value your property. A converted chapel, a barn with a restrictive covenant, a house with land and no comparable sale for five miles. Competitive bidding discovers a price that no valuer can.
• You are an executor or trustee. An open, auditable bidding process is the easiest way to demonstrate to beneficiaries — or to a court — that you obtained best value. That evidential comfort is worth paying for.
• Multiple owners disagree. Divorce, dissolved partnerships, siblings who cannot agree a figure. A public process removes the argument.
• The property needs work but is still mortgageable. Traditional auction would push you to cash investors only. The 56-day window keeps ordinary buyers in the room, and they usually pay more than investors.
• Private treaty has already failed. If the house has sat for four months and had two sales collapse, a hard deadline and a committed bidder are worth more than another price reduction.

When it is the wrong call

• Your house is standard and the area is liquid. A three-bed semi with buyers queueing does not need price discovery. It needs an agent and a sensible asking price. Auctioning it just donates 5.4% to a fee.
• The property is worth under about £120,000. The minimum fee becomes an unacceptable share of the price.
• You need speed above all. Ten to 14 weeks is not fast. If you are facing a repossession hearing, a completion deadline on a purchase, or care fees running at over £1,000 a week, look at selling your house fast to a funded buyer instead.
• Your equity is thin. A suppressed price plus a redemption charge can leave you short of clearing the mortgage. Get your redemption figure before you list.
• You would not accept the reserve. Never set a reserve you are not genuinely willing to sell at. A provider pushing you towards a lower reserve "to attract bidders" is optimising for a transaction, not for your outcome.

Questions to ask before you sign

Get all of these answered by email, not on the phone. A straight operator will answer every one without hesitation.

1. What is the exact reservation fee, as a percentage and as a minimum in pounds, including VAT? Do not accept "around 4%".
2. Is there any fee payable by me, in any circumstance, including if the property does not sell? Withdrawal fees exist. Find yours.
3. How long is the tie-in, and how do I exit? Twelve to 26 weeks is common. Get the notice period in writing.
4. Who holds the reservation fee, and what happens to it if the buyer defaults? In most models the provider keeps it. You get nothing beyond your property back.
5. How and when is the fee explained to bidders? Given the Ombudsman's findings, this is your fall-through risk in a single question.
6. What proportion of your listings in my postcode sold in the last twelve months, and at what average percentage of guide price? Vague answers tell you what the record looks like.
7. Is the guide price linked to the reserve? Guide prices set well below reserve generate bids that can never win, and waste your marketing window.
8. What happens if the buyer's mortgage is declined at day 40? Whether the exclusivity period extends, and on whose terms.

Frequently asked questions

Is the Modern Method of Auction legal and regulated?

Entirely legal. Providers must be registered with a government-approved redress scheme — The Property Ombudsman or the Property Redress Scheme — and are covered by consumer protection regulations on material information. The criticism is about disclosure and fee structure, not legitimacy. Check the provider's scheme membership with the scheme itself rather than trusting a logo on their site.

Can the buyer still pull out after paying the reservation fee?

Yes. That is the defining weakness of the conditional model. They forfeit the fee, but you cannot force completion in the way you could after a traditional auction exchange. In practice the fee is a strong deterrent — losing £11,000 concentrates the mind — but it is not the same as being legally bound.

Does the reservation fee come off the purchase price?

No. It is paid to the auction provider on top of the price, and it is not refundable. This misunderstanding is the single most common auction complaint the Ombudsman sees, and it is worth confirming your provider states it plainly in the bidder terms.

Will I get market value?

You will get whatever the market bids, minus the effect of the fee on those bids. On a genuinely contested property with several determined bidders, the competition can outrun the fee drag and you do well. On a property with one interested party, you will not — you will get a below-market price and pay 5.4% for the privilege.

What is the difference between the guide price and the reserve?

The guide price is a marketing figure designed to attract interest. The reserve is the confidential minimum you have agreed to accept, and the property cannot be sold below it without your consent. Guide prices are frequently set 5–15% below reserve to generate viewings, which is legitimate but can leave you with bids that were never capable of winning.

Can I sell through MMoA and negotiate a private sale at the same time?

Usually not. Most agreements grant exclusivity for the marketing and bidding period. Read the tie-in clause carefully — this is where sellers who change their mind get stuck for months.

How does it compare with just selling to a cash buyer?

Different products entirely. A cash buyer pays 75–85% of market value and completes in 7 to 28 days with no fees. MMoA aims for something close to market value, takes about three times as long, and costs roughly 5.4% in fee drag. If certainty and speed matter most, the cash route wins. If price matters most and your property is unusual, the auction route can. Our comparison of the best house buying companies sets out what the cash side actually pays.

The bottom line

The Modern Method of Auction is a legitimate tool that is regularly sold on a misleading premise. "Free to the seller" is not true in any economically meaningful sense — a 4.5% plus VAT buyer fee comes out of your price, and HMRC agrees it is part of the consideration.

Use it when competitive bidding will genuinely discover a price nobody could otherwise set, or when you need a defensible open process for executors or co-owners. Avoid it for ordinary houses in ordinary markets, and avoid it entirely on low-value property where the minimum fee is punitive.

Ready Steady Sell was founded by Lisa Hayes to give sellers the comparison the industry would rather they didn't make. We are not an auction house and we take nothing from auction providers. Start with an honest figure from our valuation guide, check the terminology in the property jargon guide, and look at the wider market picture in our industry data before you commit to any method.

Then ask the only question that matters: what is this route actually costing me, and what am I getting for it?