Modern Method of Auction Explained
The modern method of auction is a flexible way to sell property, but it comes with risks. Learn how it works, costs involved, and whether it’s right for you.
The modern method of auction (MMA) has become an increasingly popular way to sell property in the UK. Often marketed as a flexible alternative to traditional auctions, it promises speed, broader appeal to buyers, and reduced upfront risk.
However, while the process may seem straightforward, the modern auction method differs significantly from traditional property auctions, and it’s important to understand the pros, cons, and potential pitfalls before choosing this route.
In this guide, we explain exactly how the modern method of auction works in 2026, including timelines, costs, and whether it’s the right option for your situation.
What is the modern method of auction?
The modern method of auction is a hybrid selling method that combines elements of traditional auctions and estate agent sales.
Unlike traditional auctions, where contracts are exchanged immediately when the hammer falls, the modern method gives buyers more time to complete the purchase.
Key features:
- Buyers place bids online or through an agent
- The winning bidder pays a non-refundable reservation fee
- They are given 28 days to exchange contracts
- Completion typically happens within 56 days
This longer timeline makes the process more accessible to buyers who need to arrange financing, such as mortgages.
How does the modern method of auction work?
Selling via modern auction follows several stages.
1. Property valuation and listing
Your property is valued and listed with an auctioneer or estate agent offering MMA services. A guide price is set to attract interest.
2. Marketing period
Your property is marketed online, often across major property portals. Viewings are arranged just like a traditional sale.
This stage typically lasts 2–4 weeks, although it can vary.
3. Bidding process
Interested buyers register and place bids, usually online. The bidding period is often extended if new bids are made close to the deadline.
4. Reservation fee payment
Once bidding ends, the highest bidder wins and pays a reservation fee, which is usually:
- Between 2%–5% of the purchase price, or
- A fixed fee (often £5,000+)
This fee is non-refundable and secures the property.
5. Exchange and completion
The buyer has:
- 28 days to exchange contracts
- A further 28 days to complete
This gives them time to arrange a mortgage or carry out additional checks.
Why is the modern method of auction popular?
The modern method of auction has gained traction because it appeals to both buyers and sellers.
Benefits for sellers:
1. Wider buyer pool
Unlike traditional auctions, MMA allows buyers who need mortgages to participate, increasing demand.
2. Reduced upfront costs
In many cases, the buyer pays the reservation fee, which can offset seller costs.
3. Structured timeline
Although longer than traditional auctions, the process still offers more certainty than open market sales.
4. No immediate exchange pressure
Buyers are not required to exchange contracts instantly, making it less intimidating.
What are the disadvantages of the modern method of auction?
Despite its benefits, the modern method of auction is not without risks.
1. Higher fall-through risk
Because contracts are not exchanged immediately, buyers can still withdraw during the process.
2. Longer completion times
Sales can take up to 56 days or more, which is slower than traditional auctions.
3. Buyer fees can deter interest
The reservation fee can put off some buyers, reducing competition.
4. Potential for lower offers
Some buyers factor the reservation fee into their bid, which can reduce the final price.
Costs of the modern method of auction
Understanding the costs involved in the modern method of auction is essential.
Seller costs:
- Auctioneer or agent fees (varies)
- Legal fees (£500–£1,500+)
- Possible marketing costs
Buyer costs:
- Reservation fee (non-refundable)
- Standard purchase costs (stamp duty, solicitor fees, etc.
Modern method vs traditional property auctions
It is important to understand how the modern method of auction compares to traditional auction
| Feature | Modern Method of Auction | Traditional Auction |
|---|---|---|
| Exchange of contracts | Within 28 days | Immediate |
| Completion | Up to 56 days | Around 28 days |
| Buyer commitment | Lower initially | Legally binding immediately |
| Buyer pool | Wider | More limited |
| Risk of fall-through | Higher | Very low |
Is the modern method of auction right for you?
The modern method of auction may be suitable if:
- You want a structured but flexible sale
- Your property appeals to mortgage buyers
- You are not in an urgent rush to complete
However, it may not be ideal if:
- You need a guaranteed fast sale
- You want maximum price certainty
- You want to avoid any risk of fall-through
Alternatives to the modern method of auction
Before choosing the modern method of auction, it is worth considering other options.
Estate agents
Offer potential for higher prices but slower timelines.
Traditional auctions
Provide faster, legally binding sales but with a smaller buyer pool.
Cash buyers and property buying companies
Offer the fastest and most secure route, often completing in days.
Sell your house fast without auction delays
While the modern method of auction offers flexibility, it still carries uncertainty and can take several weeks to complete.
At We Buy Any House, we offer a faster alternative:
- No fees to pay
- No risk of fall-through
- Completion in as little as 7 days
- Up to 85–90% of market value
If you want speed and certainty without the risks of auctions, this could be the right solution.