Best and Final Offers & Sealed Bids: 2026 UK Seller Guide

By Lisa Hayes · 13 September 2026

If two or more buyers want your house, your agent will probably suggest "best and final offers" — sometimes called sealed bids. Every interested buyer submits one written offer by a set deadline, nobody sees anyone else's number, and you pick a winner. In England, Wales and Northern Ireland none of it is legally binding: the winning bidder can still walk away, renegotiate or disappear right up until exchange of contracts.

That last sentence is the whole reason this guide exists. Best and finals are sold to sellers as the moment they win. Handled badly, they are the moment a sale starts to rot — because the process rewards the buyer who is willing to write the biggest number, and the buyer willing to write the biggest number is very often the one least able to pay it.

Run well, best and finals can genuinely lift your price and end weeks of dithering in an afternoon. Run badly, they hand the property to whoever was least disciplined about the number, clear away every other buyer you had, and leave you with no fallback when that buyer's survey comes in short. The difference is rarely luck. It is almost entirely down to what the seller asked for alongside the price.

What are best and final offers?

When a property attracts competing buyers, an agent has two options. They can keep going back and forth — telling buyer A that buyer B has bid more, and around it goes — or they can stop the merry-go-round and set a deadline. Everyone submits their strongest offer in writing by, say, noon on Thursday. One shot each. No visibility of rival bids.

"Sealed bids" is the older, more formal version of the same thing, and it is still the standard phrase at the upper end of the market and in parts of London. Traditionally bids arrived in actual sealed envelopes and were opened together in front of the seller. These days it is nearly always email.

The practical difference between the two terms is close to nil. The important distinction is not sealed versus best-and-final. It is England and Wales versus Scotland, and it is enormous.

Is a sealed bid legally binding in the UK?

In England, Wales and Northern Ireland: no. Not remotely.

Property offers here are "subject to contract" by default. A buyer who wins a sealed bid at £412,000 has made a promise with no legal weight whatsoever. They can reduce it after the survey. They can drop out because their own buyer dropped out. They can simply change their mind on a Tuesday. Until contracts are exchanged, you have an intention, not a sale.

Sellers routinely misunderstand this, and some agents do nothing to correct it — because "we've achieved £412,000 for you" sounds better than "we've obtained a non-binding indication of £412,000 which may not survive contact with a surveyor."

How is it different in Scotland?

Scotland runs the same idea properly. A seller's solicitor gathers notes of interest and, when there is enough, sets a closing date. Offers must be submitted by a solicitor, in formal written terms, by that time. The seller accepts one, the solicitors exchange qualified acceptances, and once missives are concluded the deal is legally binding on both parties.

That is why Scottish buyers get a survey done before bidding, and why a Scottish closing date produces a number you can more or less bank. The bidder has already seen the Home Report. They have already committed professional fees. Walking away costs them something real.

South of the border, walking away costs a buyer precisely nothing. Same mechanism, completely different consequences.

If you are selling north of the border, our guide to selling a house in Scotland covers closing dates, Home Reports and missives in detail.

Why did Parliament try to ban sealed bids?

This is the part almost nobody writes about, and it tells you a great deal about how the process is regarded outside the estate agency industry.

On 11 October 2022, Sir Bill Wiggin, MP for North Herefordshire, introduced the Sale of Property (Sealed Bids) Bill in the House of Commons under the Ten Minute Rule. Its stated purpose was to prohibit the sale of property by sealed bids — to improve transparency, reduce costs and opaque behaviour, and ensure buyer and seller are both treated fairly by the estate agent.

It did not become law. Ten Minute Rule Bills almost never do; they are primarily a device for putting an argument on the record. The Bill was formally withdrawn on 7 March 2023.

So sealed bids remain entirely lawful, and you should not read that Bill as a warning that you are doing something dodgy by using them. Read it instead as evidence of the real problem: a process with no statutory rules, no required disclosure, no verification of bids, and no mechanism to stop anyone gaming it. When a sitting MP thinks a practice needs abolishing by Act of Parliament, treat it with your eyes open.

• 1979Estate Agents Act — the framework your agent works under
• 1991Order requiring agents to pass on all offers promptly, in writing
• 2022Bill introduced to ban property sealed bids (withdrawn 2023)
• £0What it costs a losing or winning bidder to walk away in England & Wales

What are your agent's legal duties during a best and final?

Thinner than you would hope, but not nothing.

Under the Estate Agents (Undesirable Practices) (No. 2) Order 1991, made under the Estate Agents Act 1979, it is a declared undesirable practice for an agent to fail to pass on to you, promptly and in writing, accurate details of any offer received from a prospective purchaser. "Promptly" is defined in the Order as within as short a period as is reasonably practicable in the circumstances.

Read that carefully, because it settles several arguments sellers have with agents every week:

• Every offer must reach you. An agent cannot filter out an offer they consider too low, too awkward, or from a buyer who declined their in-house mortgage broker.
• In writing. A verbal summary on the phone is not compliance.
• Accurate details. Not just the number — the buyer's position matters and should be conveyed accurately.
• Late bids count too. If a bid lands an hour after your deadline, the agent must still tell you about it. Whether you accept it is entirely your call.

What the law does not do is regulate the sealed-bid process itself. There is no requirement to verify that a rival bid exists, no standard form, no independent adjudication, no obligation on anyone to prove a bidder has the money. That gap is exactly what the 2022 Bill was aimed at.

If your agent is steering you towards a particular buyer for reasons that feel more about their commission than your outcome, that is a conversation to have bluntly and early. Our guide on how to handle offers on your house goes deeper into qualifying buyers and managing an agent who is pushing you.

When should you actually call for best and final offers?

Here is my honest position, and it is more restrictive than what most agents will tell you.

Call for best and finals when you have three or more genuinely qualified buyers who have all viewed and all offered at or near asking price. That is the scenario the process was designed for. Real competition, real scarcity, and enough bidders that losing one or two does not leave you exposed.

With exactly two interested buyers, best and finals are usually a mistake. You have turned a negotiation you control into a lottery you do not, and if the winner later chips the price you have already burned the underbidder — who is now cross, possibly buying elsewhere, and certainly not going to come back at their old number.

Do not call for best and finals simply because interest feels lively. Three viewings and a maybe is not a bidding war. Sellers who force the process on thin interest end up with one bid at asking price and an awkward phone call.

How to run a best and final properly: an eight-step process

Most sealed bids fail because the seller asked one question — how much? — when they should have asked six. Insist your agent runs it like this.

• 1. Confirm you have real competition first. Three or more qualified bidders. Ask your agent to name them and describe each position. If they cannot, you do not have a bidding war.
• 2. Set a tight, specific deadline. A date and a time — "12 noon on Thursday 24th", not "end of the week". Two to three working days is plenty. Long deadlines let buyers cool off and arrange alternative viewings.
• 3. Demand a structured bid, not a number. This is the single biggest upgrade you can make. Require every bidder to state: offer price; source of funds; mortgage agreement in principle and lender; deposit percentage; whether they have a property to sell and its status; their chain length; their proposed timescale; and their solicitor's details.
• 4. Ask for proof, not claims. "Cash buyer" is the most abused phrase in British property. Require documentary evidence — bank statements, an AIP document, a memorandum of sale for their own property. Our guide to checking whether a cash buyer is genuine explains exactly what to ask for and what the usual excuses mean.
• 5. Say clearly that the highest bid may not win. Put it in the instruction letter. It is true, it is legal, and it changes bidder behaviour for the better — strong buyers start selling you on their position rather than just their price.
• 6. Do not disclose bids to other bidders. Ever. Not "someone's offered £405 — can you beat it?" That is how the process loses credibility and how sellers end up accused of running a fake auction.
• 7. Take 24 hours before deciding. There is no prize for answering within ten minutes. Get the bids in a spreadsheet, score them, and sleep on it.
• 8. Move fast once you have chosen. Memorandum of sale out the same day, solicitors instructed within 48 hours, and ask the buyer to book their survey immediately. Momentum is the best protection you have against a wobble.

How should you score the bids?

Score them. Actually score them, on paper. The number at the top of the page is one factor among several, and the others routinely matter more.

A bid of £398,000 from a chain-free buyer with a 30% deposit and a solicitor already instructed is worth more than £412,000 from someone whose flat goes on the market next month. Not slightly more. Meaningfully more, once you price in the risk of three months lost and starting again.

What if the winning bid is far above the asking price?

Be pleased, then be careful. The lender's surveyor has not read your sealed bid instructions and does not care that four people wanted the house.

Mortgage lenders value on comparable evidence. If your buyer needs a mortgage and the winning bid is well above what similar properties nearby have actually sold for, there is a real chance of a down valuation — the lender agreeing to lend against a lower figure and the buyer having to find the shortfall in cash or ask you to reduce.

This is the single most common way a triumphant sealed bid turns into a renegotiation eight weeks later. It is also why deposit size matters so much: a buyer with 25% down can usually absorb a down valuation, while a buyer with 5% down has no room at all. Our guide on what to do about a down valuation sets out your options if it happens.

If the top bid looks detached from reality, it is entirely reasonable to ask that bidder, through your agent, how they intend to cover a shortfall if the valuation comes in under. A serious buyer will have an answer ready. An unserious one will get defensive.

Can a buyer reduce their offer after winning a sealed bid?

Yes. In England and Wales they can reduce it the next morning if they want to, and some do exactly that — it is a known tactic. Win the bidding by overpaying, remove the competition, then chip the price once the underbidders have moved on and the seller is emotionally committed.

That is gazundering, and a sealed bid process makes a seller unusually vulnerable to it, because you have deliberately cleared the field of everyone else.

Three defences, in order of usefulness:

• Keep the underbidders warm. Do not tell losing bidders they have lost and that is that. Tell them the truth: another offer has been accepted, you will keep their details, and you will come straight back to them if anything changes. Ask your agent to check in with them every fortnight. A live underbidder is the most powerful anti-gazundering tool there is.
• Get to exchange quickly. Every week between acceptance and exchange is a week in which something can change. Have your paperwork ready before you even call for bids.
• Prefer the buyer who cannot easily chip. A chain-free buyer with a big deposit has fewer levers to pull than a highly leveraged buyer with a wobbly chain behind them.

The reverse risk exists too: if you accept a bid and then a higher one arrives before exchange, you are legally free to accept it. That is gazumping, and while it is lawful, doing it after running a formal sealed bid is a fast route to a complaint, a collapsed sale and a very bad week. My advice is simple: if you ran the process, honour the result.

Do you have to accept the highest offer?

No. You have no obligation to accept the highest bid, and no obligation to accept any bid at all. You can take the second-highest because they are chain-free. You can take the third because they can complete by Christmas. You can reject the lot and go back to open marketing.

Two practical caveats. If you are selling as an executor or a trustee, your duty is to the estate or the beneficiaries, and you should be able to justify accepting anything other than the best net outcome — so record your reasoning in writing at the time. And if a bidder has a legitimate complaint about how the process was run, the agent is the one who answers for it, which is another reason to insist on clean, identical instructions to everyone.

Common mistakes sellers make

• Calling for best and finals on two buyers. Negotiate instead. You will usually do better and you keep both in play.
• Accepting the top number reflexively. Score the bids. Every time.
• Letting the agent set a vague deadline. "By the end of the week" invites late bids, confusion and accusations of unfairness.
• Telling bidders what others have offered. It destroys trust and it is the behaviour that gets the whole practice criticised.
• Dismissing the underbidders. They are your insurance policy. Keep them close.
• Not having the legal paperwork ready. Property information forms, title documents, guarantees, building regulation certificates — get them to your solicitor before the deadline, not after.
• Running the process purely to squeeze the price. If you need speed and certainty rather than the last £5,000, a sealed bid is the wrong tool entirely.

When are best and final offers the wrong approach?

If your priority is certainty and a date rather than the highest achievable figure, a bidding process actively works against you. It selects for the buyer most willing to stretch — which is to say, the buyer most likely to have trouble.

That applies particularly if you are selling under pressure: a divorce settlement, a probate sale with beneficiaries waiting, a chain that has already collapsed once, an empty property costing you money every month, or a purchase you cannot afford to lose. In those situations the seller's real enemy is time, not price.

Sellers in that position are often better served by a genuine chain-free buyer at an agreed, realistic figure — or by comparing what regulated quick-sale firms will actually pay against what an open-market sale would net after months of fees, bills and risk. Our guides on selling your house fast and cash house buyers explain how those offers are calculated and where the genuine operators differ from the rest.

And if you are at the other end — plenty of time, strong demand, a property people are fighting over — then read up on setting the right asking price, because a well-pitched asking price is what creates the competition that makes a sealed bid worth running in the first place.

A short word on fairness

Sealed bids get a bad name partly because some agents run them badly and partly because losing buyers have no way of knowing whether the process was honest. You cannot fix the whole industry. You can run yours cleanly: identical written instructions to every bidder, a firm deadline, no disclosure of rival numbers, a clear statement that the highest bid may not win, and a prompt, courteous answer to everyone afterwards.

That costs you nothing. It protects you if anyone complains. And it makes underbidders far more willing to come back if your first choice falls over — which, given that nothing is binding until exchange, is a possibility worth planning for from the start.

What to do next

If you have competing buyers, slow down for an afternoon. Write out what each one actually brings: funding, chain, deposit, timescale, solicitor. Decide whether you have three real bidders or one real bidder and two spectators. Then run the process properly, or do not run it at all.

If you are weighing a strong open-market bid against the certainty of a chain-free sale, it is worth seeing both numbers side by side before you commit. You can compare offers here — no obligation, and it costs nothing to know what the alternative looks like.