Subject to Contract: What It Means for Sellers

If you are selling a property in England or Wales, you will see the words "subject to contract" on virtually every piece of correspondence between your estate agent, your solicitor, the buyer, and the buyer's solicitor. It appears on the memorandum of sale, on email headers, on draft contracts, and on letters between solicitors. It is one of the most important phrases in English property law, and yet many sellers do not fully understand what it means or the risks it carries.

This guide explains the legal meaning of "subject to contract," why the law in England and Wales works this way, what it means in practice for your sale, and what steps you can take to protect yourself during the period when your transaction is not yet legally binding.

What does "subject to contract" mean?

"Subject to contract" means that an agreement has been reached between a buyer and a seller — typically on the purchase price — but that agreement is not yet legally binding. No enforceable contract exists. Either party can withdraw at any time, for any reason, without legal liability.

The phrase serves as a legal marker. By including it on correspondence and documents, both parties (and their representatives) are making clear that everything discussed and agreed so far is provisional. Nothing becomes binding until the formal exchange of contracts, which is a specific legal event managed by the solicitors acting for each side.

This principle is rooted in Section 2 of the Law of Property (Miscellaneous Provisions) Act 1989, which requires that a contract for the sale of land must be:

• In writing
• Contain all the terms expressly agreed between the parties
• Signed by or on behalf of both parties

Until a written contract meeting these requirements has been exchanged, there is no legally enforceable agreement — regardless of how many emails have been exchanged, how many forms have been completed, or how much money the buyer has spent on surveys and searches. The accepted offer, the memorandum of sale from the estate agent, and even a fully agreed draft contract sitting unsigned on a solicitor's desk are all "subject to contract" and carry no binding force.

Why does the law work this way?

The subject to contract system exists because buying and selling property is one of the most significant financial decisions most people will make. The law provides a period during which both parties can carry out due diligence — surveys, searches, legal enquiries, and mortgage arrangements — before committing to a legally binding contract.

The rationale is protective. A buyer should not be locked into purchasing a property before they have had the opportunity to discover latent defects, planning restrictions, boundary disputes, or other issues that might affect the property's value or their willingness to proceed. Equally, a seller should not be bound to a buyer who may be unable to complete — for example, because their mortgage application is declined or their own sale falls through.

However, this protection comes at a cost. Because neither party is bound, either can withdraw at any stage before exchange. This creates a window of vulnerability for both sides. For sellers, the main risks during this period are the buyer pulling out (sometimes called "gazundering" if they try to reduce the price at the last minute) and the time and money spent on a transaction that may not complete. For buyers, the main risk is being "gazumped" — the seller accepting a higher offer from another party.

How England and Wales differs from Scotland

Scotland operates a fundamentally different system. In Scotland, property sales are conducted through a process called "conclusion of missives," in which the buyer's and seller's solicitors exchange formal letters (missives) that, once concluded, create a legally binding contract. This happens much earlier in the process than exchange of contracts in England and Wales, which means Scottish sales are less likely to fall through once an offer has been accepted.

There have been periodic calls to reform the English and Welsh system to reduce the period during which either party can withdraw. The government has explored options such as mandatory reservation agreements and upfront information packs, but as of 2026, the fundamental subject to contract principle remains unchanged.

The timeline: from offer acceptance to exchange

The subject to contract period runs from the moment you accept an offer to the moment contracts are exchanged. Understanding what happens during this window, and how long each stage typically takes, helps you identify where delays and risks arise.

Many of these stages run in parallel rather than sequentially. The buyer's survey might be happening at the same time as the solicitor is reviewing the draft contract pack and ordering searches. However, the total elapsed time from offer to exchange is typically 8 to 14 weeks for a straightforward transaction. In more complex cases — involving chains, leasehold issues, or planning complications — it can stretch to 16 to 20 weeks or longer. For a full breakdown, see our guide on how long conveyancing takes.

Throughout this entire period, the sale remains subject to contract. The longer it takes to reach exchange, the greater the risk that something goes wrong and the transaction collapses.

What can go wrong during the subject to contract period

The subject to contract period is when the vast majority of failed property transactions collapse. According to industry estimates, approximately one in three agreed sales in England and Wales falls through before exchange. Understanding the most common causes helps you take preventive action.

Buyer pulls out

The buyer can withdraw for any reason. Common triggers include an unsatisfactory survey, a mortgage application being declined, a change in personal circumstances (job loss, relationship breakdown), cold feet, or an issue uncovered during conveyancing enquiries. As a seller, you have no legal remedy. You cannot claim the buyer's costs, and you cannot force them to proceed. For more detail on this risk, see our guide on when a buyer can pull out.

Gazumping

Gazumping occurs when a seller accepts a higher offer from a different buyer after already accepting an offer from someone else. Because the original agreement is subject to contract, the seller is legally entitled to do this. Gazumping is legal in England and Wales but is widely considered unethical. It wastes the original buyer's time and money (on solicitor fees, survey costs, and search fees) and can damage the seller's reputation with local estate agents. See our guide on gazumping and the law for a detailed analysis.

Gazundering

Gazundering is the buyer's equivalent of gazumping. The buyer waits until shortly before exchange and then reduces their offer, knowing the seller has already invested significant time and money in the transaction. This is also legal during the subject to contract period. It often follows a survey that reveals issues with the property, but it can also be a purely tactical move.

Chain collapse

If your buyer is in a chain — meaning they need to sell their own property to fund the purchase of yours — a collapse anywhere in the chain can cause your sale to fall through. Every link in the chain is subject to contract until the entire chain exchanges simultaneously. A single withdrawal at any point brings down the whole chain. For strategies to manage this, see our guide on why house sales fall through.

Mortgage issues

The buyer's mortgage offer is typically one of the last pieces to fall into place before exchange. If the lender's valuation comes in below the agreed price (a "down valuation"), the lender may offer less than the buyer expected, potentially killing the deal unless the buyer can bridge the gap or the seller agrees to reduce the price. Mortgage applications can also be declined altogether if the buyer's circumstances change between the agreement in principle and the formal application.

Your rights as a seller during the subject to contract period

Because no binding contract exists, your legal rights during the subject to contract period are broad but also limited in certain respects:

• You can withdraw at any time. You are not legally obligated to proceed with the sale, even if the buyer has spent money on surveys, searches, and legal fees.
• You can accept a higher offer. Gazumping is legal, though your estate agent may have a duty under the Estate Agents Act 1979 to pass on any offers received to you and to inform the original buyer that another offer has been made.
• You can continue marketing the property. Unless you have signed a lock-out agreement granting the buyer exclusivity, you are free to continue showing the property and accepting viewings.
• You cannot claim the buyer's costs. If you withdraw, the buyer cannot claim their wasted costs from you, and equally, if the buyer withdraws, you cannot claim your wasted costs from them. Each party bears their own costs during the subject to contract period.
• You cannot force the buyer to exchange. There is no mechanism to compel a buyer to exchange contracts. You can set deadlines and apply pressure through your estate agent, but ultimately the decision rests with the buyer and their solicitor.

How to protect yourself during the subject to contract period

While you cannot eliminate the risk inherent in the subject to contract system, you can take practical steps to reduce the likelihood of your sale falling through and to shorten the window during which it is at risk.

1. Prepare your legal paperwork before listing

The single most effective step you can take is to have your legal documents ready before you accept an offer. This means completing the TA6 Property Information Form, the TA10 Fittings and Contents Form, and gathering your title documents, planning permissions, building regulations certificates, and any other supporting documentation. If your solicitor can send the draft contract pack to the buyer's solicitor within days of offer acceptance rather than weeks, you compress the entire conveyancing timeline and reduce the period during which the sale is at risk.

This is the core principle behind Pine's approach to sale preparation. By getting the legal groundwork done upfront, you remove the biggest cause of delays and give the buyer fewer reasons to reconsider during a long, drawn-out process.

2. Vet your buyer thoroughly

Before accepting an offer, carry out basic due diligence on the buyer. Ask for proof of funds — a mortgage agreement in principle or evidence of cash funds. Find out their chain position: are they a first-time buyer, a chain-free buyer, or do they need to sell their own property first? Check whether they have already instructed a solicitor. A buyer who has a mortgage agreement in principle, no chain, and a solicitor already in place is far more likely to complete than one who has none of these. For more on this, see our guide on how to vet a buyer.

3. Set expectations early

Work with your estate agent to set a clear, realistic timeline for exchange from the outset. Both parties should understand when the draft contract pack will be sent, when enquiries should be raised and answered, and when exchange is expected. While these are not legally binding deadlines (everything remains subject to contract), having a shared timeline creates momentum and makes it easier to identify when things are going off track. Our guide on how long to give a buyer to exchange covers this in more detail.

4. Maintain regular communication

Many sales fall through because of poor communication. Weeks of silence breed uncertainty, and uncertainty leads to cold feet. Stay in regular contact with your solicitor and estate agent. Ask for weekly updates on progress. If the buyer's solicitor is slow to raise enquiries, your solicitor should chase them. If the buyer's survey reveals issues, deal with them promptly rather than leaving them unresolved. For more practical strategies, see our guide on how to keep your buyer committed.

5. Consider a lock-out agreement

A lock-out agreement (also called an exclusivity agreement) is a separate legal contract in which you agree not to negotiate with or accept offers from other buyers for a specified period — typically two to four weeks. This gives the buyer confidence that they will not be gazumped, which can encourage them to invest in surveys and searches more quickly. The lock-out agreement does not make the sale itself binding — the property transaction remains subject to contract — but it restricts your ability to accept another offer during the exclusivity period.

To be legally enforceable, a lock-out agreement must be in writing, specify the exclusivity period, and be supported by consideration (something of value provided by the buyer, even if only a nominal sum). The landmark case on this point is Pitt v PHH Asset Management Ltd [1994] 1 WLR 327, in which the Court of Appeal held that a lock-out agreement is enforceable provided it meets these requirements.

6. Consider a reservation agreement

A reservation agreement goes a step further than a lock-out agreement. Both parties pay a deposit (typically £500 to £2,000 each) into a managed account. If either party withdraws without a valid reason defined in the agreement, they forfeit their deposit. This creates a financial incentive for both sides to proceed to exchange. Reservation agreements are not yet widespread in England and Wales, but they are gaining traction and have been endorsed by the government as part of its efforts to reduce the number of failed transactions.

Subject to contract vs. exchange of contracts

Understanding the distinction between the subject to contract phase and the post-exchange phase is critical. The two periods carry fundamentally different legal consequences.

For a detailed explanation of what happens once you reach exchange, see our guide on what happens between exchange and completion.

The exchange of contracts: when subject to contract ends

Exchange of contracts is the pivotal moment in any property transaction in England and Wales. It is the point at which the sale stops being subject to contract and becomes legally binding on both parties.

How exchange works in practice

Despite its importance, exchange of contracts is a relatively simple process. It is typically conducted by telephone between the two solicitors using one of the Law Society's standard formulae:

• Formula A: Each solicitor holds their client's signed part of the contract. They exchange by agreeing over the telephone and then posting the signed parts to each other.
• Formula B: The buyer's solicitor sends their client's signed part to the seller's solicitor in advance. The seller's solicitor holds both parts and exchanges over the telephone by confirming they will post the seller's signed part to the buyer's solicitor.
• Formula C: Used in chain transactions. Each solicitor in the chain agrees to exchange simultaneously, so all linked transactions become binding at the same time.

At the point of exchange, the buyer's solicitor transfers the deposit (usually 10 per cent of the purchase price, though 5 per cent is sometimes negotiated) to the seller's solicitor. A completion date is fixed, and both parties are legally committed to completing the transaction on that date.

What happens if a party tries to pull out after exchange?

Once contracts have been exchanged, pulling out has serious legal and financial consequences:

• If the buyer pulls out: The seller is entitled to keep the deposit (typically 10 per cent of the purchase price) and can pursue the buyer for any additional losses, including the costs of remarketing and any shortfall if the property is subsequently sold for less.
• If the seller pulls out: The buyer can seek an order for specific performance (a court order requiring the seller to complete the sale) or claim damages for breach of contract. The seller must return the deposit with interest and may be liable for the buyer's wasted costs.

These consequences explain why both solicitors will ensure that all outstanding issues — including the mortgage offer, search results, enquiry responses, and any chain dependencies — are resolved before they agree to exchange.

Simultaneous exchange and completion

In some transactions, the parties agree to exchange contracts and complete on the same day. This is known as simultaneous exchange and completion. It eliminates the subject to contract period entirely in the sense that the sale goes directly from "subject to contract" to "completed" with no gap in between.

Simultaneous exchange and completion is most common in chain-free transactions where both parties are ready to proceed quickly. It can be attractive because it reduces the overall risk period, but it also removes the safety net of having a gap between exchange and completion for arranging removals, redirecting post, and finalising practical details. It is not suitable for chain transactions, where multiple linked sales need to be coordinated.

Common misconceptions about subject to contract

Several misunderstandings about the subject to contract principle can cause sellers (and buyers) unnecessary stress or lead to poor decisions.

"We shook hands on it, so it's a deal"

A handshake, a verbal agreement, or an email confirming the agreed price does not create a binding contract for the sale of property in England and Wales. Section 2 of the Law of Property (Miscellaneous Provisions) Act 1989 is clear: the contract must be in writing, contain all the terms, and be signed by both parties. No amount of verbal reassurance changes this.

"The estate agent confirmed the sale, so we're committed"

The memorandum of sale issued by your estate agent is an administrative document, not a legal contract. It confirms the agreed price and the details of both parties, but it is expressly marked "subject to contract" and creates no legal obligations. The estate agent has a statutory duty under the Estate Agents Act 1979 to forward all offers to you until contracts are exchanged, which underlines the point that the sale is not binding until exchange.

"The buyer has spent money on a survey, so they can't pull out"

The amount of money the buyer has spent on surveys, searches, and legal fees is irrelevant to their right to withdraw. A buyer who has spent £2,000 on a full building survey, £300 on searches, and £1,000 on legal fees is just as free to withdraw as one who has spent nothing. These are sunk costs, and neither party can recover them from the other if the sale falls through before exchange.

"Subject to contract means the sale is almost certain"

It does not. Data from various industry sources suggests that roughly 25 to 33 per cent of agreed sales in England and Wales fall through before exchange. While accepting an offer is an important milestone, it is the beginning of the conveyancing process, not the end. Treating the sale as secure before exchange is a common mistake that can lead to poor decisions about onward purchases, removal arrangements, and financial planning.

The seller's position in a property chain

If you are selling one property and buying another, you are part of a property chain, and the subject to contract principle applies to every transaction in that chain. Your sale to your buyer and your purchase from your seller are both subject to contract until the entire chain exchanges simultaneously.

This creates compounding risk. If any transaction in the chain collapses — because a buyer pulls out, a mortgage is declined, or a survey reveals a serious problem — it can bring down every other transaction in the chain. The longer the chain, the greater the risk.

As a seller in a chain, your best strategies are:

• Prepare your sale documentation upfront so your side of the chain is ready to exchange as quickly as possible
• Choose a buyer with the simplest possible position — ideally chain-free or with a short chain
• Stay in regular contact with your estate agent and solicitor so you are aware of any delays or problems in the chain early
• Have a contingency plan in case the chain collapses, such as bridging finance or short-term rental accommodation

What your solicitor's role is during the subject to contract period

Your solicitor plays a central role in managing the subject to contract period. Their responsibilities include:

• Preparing the draft contract pack. This includes the contract itself, your title documents, the TA6, TA10, and any supporting documents. The faster this is sent to the buyer's solicitor, the faster the process moves.
• Responding to enquiries. The buyer's solicitor will raise conveyancing enquiries about the property, the title, and the information you have provided. Your solicitor will draft responses, often in consultation with you.
• Negotiating the contract. The standard form contract used in most residential sales is based on the Law Society's Standard Conditions of Sale (5th edition). Your solicitor will negotiate any special conditions with the buyer's solicitor.
• Managing exchange. Your solicitor coordinates the timing of exchange, ensuring that the deposit is in place, the contract is signed, and (in a chain) all linked transactions are ready to exchange simultaneously.
• Advising you on risks. If there are red flags — for example, the buyer's solicitor is unresponsive, the mortgage offer is delayed, or the chain is unstable — your solicitor should flag these and advise on your options.

For a full overview of what your solicitor does throughout the sale, see our guide on what your solicitor actually does.

Practical checklist: managing the subject to contract period

Use this checklist to stay on top of your sale during the subject to contract period and minimise the risk of it falling through:

1. Complete the TA6, TA10, and any other required forms before or immediately after accepting an offer
2. Ensure your solicitor has all supporting documents (title deeds, planning permissions, building regulations certificates, guarantees, warranties)
3. Confirm your buyer has a mortgage agreement in principle or proof of cash funds
4. Check your buyer's chain position and timescale
5. Agree an informal target date for exchange with the buyer through your estate agent
6. Ask your solicitor for weekly progress updates
7. Respond promptly to any enquiries or requests for additional information
8. Monitor the buyer's mortgage application progress through your estate agent
9. If the buyer is in a chain, ask your estate agent to keep you informed of progress throughout the chain
10. If exchange is delayed beyond the agreed target date, discuss your options with your solicitor and estate agent

Proposed reforms to the subject to contract system

The subject to contract system has been criticised for decades as a source of wasted costs, stress, and uncertainty. Various reforms have been proposed over the years:

• Mandatory reservation agreements. The government's 2017 call for evidence on "Improving the Home Buying and Selling Process" explored whether mandatory reservation deposits could reduce the number of failed transactions. The idea was that both parties would pay a non-refundable deposit at the point of offer acceptance, forfeitable if they withdrew without good reason. As of 2026, this has not been implemented.
• Upfront material information. National Trading Standards' material information requirements (Part A, B, and C) already require estate agents to provide key property information in the listing. The intention is to reduce the number of surprises during conveyancing that cause buyers to pull out.
• Digital property logbooks. The concept of a standardised digital record for each property that would make key information available to buyers from day one has been discussed but not widely adopted.
• Adopting the Scottish model. Some commentators have suggested moving to a system closer to Scotland's, where a binding contract is created earlier in the process. This would require fundamental legislative change and has not gained political traction.

While the underlying law has not changed, the practical trend is towards earlier preparation of sale materials. The more information that is available upfront, the shorter the subject to contract period needs to be, and the less likely the sale is to fall through. This is the approach Pine takes: helping sellers prepare their legal documents before they go to market, so the conveyancing process can start from a stronger position the moment an offer is accepted.

Sources

• Law of Property (Miscellaneous Provisions) Act 1989, Section 2 — legislation.gov.uk
• Estate Agents Act 1979 — legislation.gov.uk
• Law Society — Conveyancing Protocol, 5th edition — lawsociety.org.uk
• Law Society — Standard Conditions of Sale, 5th edition — lawsociety.org.uk
• Pitt v PHH Asset Management Ltd [1994] 1 WLR 327 — Court of Appeal
• Walford v Miles [1992] 2 AC 128 — House of Lords (lock-in agreements unenforceable, lock-out agreements enforceable)
• HM Land Registry — Practice Guide 12: official searches — gov.uk
• National Trading Standards — Material Information in Property Listings — nationaltradingstandards.uk
• Citizens Advice — "If your house sale or purchase falls through" — citizensadvice.org.uk
• Ministry of Housing, Communities & Local Government — "Improving the Home Buying and Selling Process," call for evidence, 2017 — gov.uk

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