Comparison · Property · 2026
Modern Method of Auction vs Traditional Auction UK Property 2026
The Modern Method of Auction (conditional, longer timescale, reservation fee) has grown alongside the Traditional Auction (unconditional, exchange on the day, 10% deposit). The two work very differently for buyers, especially anyone relying on a mortgage. Here is how they compare for 2026.
TL;DR - 30-Second Summary
- - Modern Method of Auction: conditional, ~56 days to complete, non-refundable reservation fee (~2-2.5%+VAT) on top of the price
- - Traditional Auction: unconditional, exchange on the day, 10% deposit, usually 28 days to complete
- - Mortgage buyers: the Modern Method gives far more time to arrange finance than a Traditional Auction
Side by Side: MMoA vs Traditional Auction
| Feature | Modern Method of Auction | Traditional Auction |
|---|---|---|
| Contract status when bid wins | Conditional — reservation only | Unconditional — exchanged immediately |
| Total time to complete | Typically 56 days (28 + 28) | Typically 28 days total |
| Extra buyer fee | Non-refundable reservation fee, ~2-2.5%+VAT | None beyond standard buyer's premium (if any) |
| Deposit | Paid at exchange, within the conditional period | 10% paid immediately, at risk |
| Suited to | Mortgage-dependent buyers | Cash buyers and bridging finance |
Who Should Choose What?
The Modern Method of Auction suits...
- - Buyers needing a mortgage who can budget for the reservation fee
- - Sellers wanting to widen the buyer pool beyond cash buyers
- - Anyone comfortable with the extra non-refundable fee for more time
A Traditional Auction suits...
- - Cash buyers or those with bridging finance already arranged
- - Buyers who want speed and certainty over a longer conditional period
- - Sellers wanting an unconditional, legally binding sale on the day
Frequently Asked Questions
What is the Modern Method of Auction (MMoA)?
The Modern Method of Auction, also called a conditional auction, lets a winning bidder pay a non-refundable reservation fee (commonly around 2-2.5% of the price, plus VAT) to secure the property, then typically has 28 days to exchange contracts and a further 28 days to complete — 56 days in total, much longer than a traditional auction.
What is a Traditional Auction?
A Traditional Auction is unconditional: the winning bidder exchanges contracts the moment the hammer falls (or the online timer ends), pays a 10% deposit immediately, and must complete — usually within 28 days — with no further conditions to satisfy.
Why does MMoA have a reservation fee on top of the price?
The reservation fee compensates the auctioneer/agent for reserving the property to you during the longer conditional period, since — unlike a traditional auction — the sale is not immediately binding and the buyer needs time to arrange a mortgage. This fee is on top of the purchase price and is usually non-refundable even if the sale later falls through.
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Which method suits mortgage-dependent buyers better?
The Modern Method of Auction, because its 56-day timescale gives enough time to arrange a standard mortgage. A Traditional Auction's 28-day unconditional completion window is usually too tight for most mainstream mortgage lenders, which is why cash buyers and bridging finance dominate traditional auctions.
Is the MMoA reservation fee refundable if I do not complete?
Usually not. Reservation fees are typically described as non-refundable regardless of whether the sale proceeds, which has drawn criticism and regulatory scrutiny — always read the specific auction house terms carefully before bidding.
Is a Traditional Auction deposit refundable if I withdraw?
No. Once you have won the bid and exchanged contracts (immediately, on the day), your 10% deposit is at risk exactly as in any unconditional exchange — if you fail to complete within the set period, you can lose the deposit and be liable for the seller's losses.
Does either method affect Stamp Duty Land Tax?
No — SDLT is calculated on the purchase price in the same way regardless of which auction method is used. However, the MMoA reservation fee is a separate charge to the auctioneer, not part of the purchase price, and is not itself subject to SDLT.
Which method do sellers tend to prefer?
Traditional auctions give sellers immediate certainty (unconditional exchange on the day), while the Modern Method of Auction widens the buyer pool to include mortgage-dependent buyers, which can increase competition and final price, at the cost of a longer and less certain path to completion.
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Disclaimer: This is educational information, not legal advice. Reservation fees, timescales and terms vary between auction houses — always read the specific auction pack and legal terms, and check gov.uk/buy-sell-your-home before bidding.
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