Exchange of Contracts (2026): What It Is, What Happens & the Point of No Return
Exchange of contracts is the moment a property sale becomes legally binding. Up to that point either side can walk away for free; after it, you’re committed — the deposit is paid, the completion date is fixed, and pulling out means serious financial consequences. Here’s exactly what happens, when, and what to have ready.
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Quick answer
Exchange of contracts is the point at which a property purchase becomes legally binding in England and Wales. It happens when the buyer’s and seller’s solicitors formally swap signed contracts — usually confirmed by phone using the Law Society’s set “formula” — typically 8–12 weeks after an offer is accepted. At exchange, three things happen: the buyer pays a deposit (traditionally 10% of the purchase price, though first-time buyers often pay 5%), the completion date is fixed and legally enforceable, and both parties become committed to the sale. Before exchange, either side can withdraw with no legal penalty; after it, a buyer who pulls out risks losing their entire deposit and facing a claim for damages. Exchange usually takes place during business hours — often aimed for around or before 1pm, especially when completion is the same day, because bank transfer cut-offs fall between roughly 3pm and 5pm. The gap between exchange and completion is typically 7–14 days, but it can be same-day or several weeks — whatever both sides write into the contract. Crucially, risk passes to the buyer at exchange, so buildings insurance must be in place from the exchange date, not completion. Exchange cannot happen until the mortgage offer, searches and enquiries are all complete. As of August 2026.
In this guide
What exchange of contracts actually is
Despite the name, nothing physical is exchanged. Exchange of contracts is a legal formality in which the two solicitors — one acting for the buyer, one for the seller — confirm to each other, usually by telephone, that both sides have signed identical contracts and are ready to proceed. They follow a structured script known as the Law Society Formula, which creates a binding contract between buyer and seller at the exact moment of exchange. Up to this point, everything has been “subject to contract”: an accepted offer signals intent but carries no legal weight, and either party can withdraw without penalty (this is the window where gazumping can happen). Exchange is the moment that ends — the sale becomes legally binding, and the transaction shifts from “hopefully” to “definitely.” It typically happens 8–12 weeks after your offer is accepted, once all the groundwork is done: the mortgage offer issued, searches returned, enquiries answered (following the valuation), and the contract signed. Exchange simply cannot take place until those are complete, which is why it sits near the end of the buying process, not the start.
What happens at exchange
At the moment of exchange, several things happen together, and they’re worth understanding as a set:
- The contract becomes legally binding. Both buyer and seller are now committed to completing on the agreed date. Neither can withdraw without serious financial consequences.
- The deposit is paid. The buyer’s deposit — traditionally 10% of the purchase price — must already be cleared in the buyer’s solicitor’s account, and is transferred to the seller’s solicitor, who holds it until completion.
- The completion date is fixed. The date you’ll actually move and become the owner is set at exchange and is now legally enforceable — it can’t be moved unless both sides agree.
- Risk passes to the buyer. From exchange, you’re responsible if anything happens to the property, which is why buildings insurance must be in place from the exchange date, not completion. (For a leasehold flat, the freeholder often arranges this — worth checking.)
Before agreeing to exchange, your solicitor confirms everything is in place: mortgage funds available, deposit cleared, completion date agreed, and all paperwork in order. Once both solicitors confirm readiness, they exchange simultaneously — and across a chain, every transaction exchanges together in a coordinated sequence.
What time of day exchange happens
This is one of the most-asked questions, and it has a practical answer. Exchanges happen strictly during solicitors’ working hours, because the process requires solicitors to speak directly by phone to confirm the exchange and verify the contract terms match. Early-morning exchanges before 10am are uncommon, because solicitors first need to verify mortgage funds have cleared, confirm the deposit transfer, and finish any final checks. When exchange and completion are happening on the same day, solicitors typically aim to exchange by around 1pm — this buffer ensures funds can reach the seller’s solicitor before the banks’ same-day transfer cut-offs, which fall between roughly 3pm and 5pm depending on the bank. This banking constraint is also why exchanges essentially never happen in the evening or at weekends. If exchange and completion are on separate days (the more common arrangement), there’s less time pressure on the exact hour, but it still takes place within business hours. So the short answer: usually late morning to early afternoon, aimed before 1pm for same-day completions.
Exchange can’t happen until your mortgage offer is issued.
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The exchange deposit (and the mortgage-deposit confusion)
Two different “deposits” — don’t mix them up
A common source of confusion: the deposit you pay at exchange is not the same as your mortgage deposit, though they’re related.
The exchange deposit is traditionally 10% of the purchase price (though 5% is common, especially for first-time buyers, and it’s negotiable), paid to the seller’s solicitor at exchange as your commitment. It must be in your solicitor’s account as cleared funds before exchange can happen.
Your mortgage deposit is the total cash you’re putting toward the property (say 10% or 15%), with the mortgage covering the rest. In practice the exchange deposit forms part of your overall deposit — the money you’ve saved goes toward the 10% at exchange, and the remaining balance is paid at completion along with the mortgage funds.
If your saved deposit is less than 10% (for example a 5% deposit buyer), your solicitor can usually arrange a reduced exchange deposit — this is routine. Understanding how much you’re borrowing versus putting down is worth doing well before exchange.
Why it’s the point of no return
Exchange is called the point of no return for good reason. Before exchange, the sale is not binding — either side can walk away for any reason, at no legal cost (however frustrating that is for the other party). After exchange, you are legally committed, and the consequences of pulling out are severe. If a buyer withdraws after exchange, they typically forfeit their entire deposit (potentially tens of thousands of pounds) and can face a claim for damages if the seller loses money reselling. If a seller withdraws, they can be sued for breach of contract and forced to compensate the buyer. If either party simply fails to complete on the agreed date, the other can serve a Notice to Complete, giving usually 10 working days to finalise, with penalty interest running daily — and if still unfulfilled, the contract can be rescinded and the deposit forfeited. This is exactly why so much has to be confirmed before exchange: once those contracts are exchanged, there’s no cheap way out. It’s also why the period between offer and exchange is where all the risk and uncertainty lives — and why getting there efficiently, with your mortgage and paperwork ready, matters so much.
After exchange: the run to completion
Once you’ve exchanged, the finish line is in sight. The gap between exchange and completion — the day you actually get the keys and become the legal owner — is typically 7–14 days, though it can be same-day (common for chain-free cash buyers) or several weeks, depending entirely on what both sides agreed and wrote into the contract. In that window, final preparations happen: your solicitor arranges to draw down the mortgage funds, prepares the completion statement, and coordinates the transfer — a key part of the overall cost of buying falls due here. Completion most often happens on a Friday, to give everyone the weekend to move, though a mid-week completion can sometimes be quicker on the day and cheaper for removals. On completion day itself, the money transfers, the seller’s solicitor confirms receipt, and the keys are released — usually between midday and mid-afternoon. That’s a distinct stage with its own details worth understanding separately, but from exchange, the hard part is done: you’re legally on your way to owning the property. For the full picture of the buying journey, see how long it takes to buy a house.
The bottom line
Exchange of contracts is the legal moment a property sale becomes binding: the deposit (usually 10%) is paid, the completion date is fixed, risk and insurance responsibility pass to the buyer, and neither side can pull out without serious cost. It usually happens 8–12 weeks after your offer, during business hours and often before 1pm, with completion following 7–14 days later. Everything before exchange is preparation to reach this point safely — which is why having your mortgage offer, deposit and paperwork all in order is what gets you here — whether you’re a first-time buyer or moving up the ladder. Once contracts are exchanged, the uncertainty is over and you’re legally on your way to the keys.
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Exchange of contracts: FAQs
What does exchange of contracts mean?
Exchange of contracts is the point at which a property sale becomes legally binding in England and Wales. It happens when the buyer’s and seller’s solicitors formally swap signed contracts, usually confirmed by phone using the Law Society Formula. At exchange, the buyer pays a deposit (traditionally 10% of the purchase price), the completion date is fixed, and both parties become legally committed to the sale. Before exchange, either side can withdraw without penalty; after exchange, pulling out means serious financial consequences including loss of the deposit. It typically happens 8 to 12 weeks after an offer is accepted, once the mortgage offer, searches and enquiries are all complete.
What time of day does exchange of contracts happen?
Exchange happens during solicitors’ working hours, because it requires the solicitors to speak by phone to confirm the exchange and verify the contract terms match. Early-morning exchanges before 10am are uncommon, as solicitors first need to verify mortgage funds and deposit transfers have cleared. When exchange and completion are on the same day, solicitors typically aim to exchange by around 1pm, to ensure funds reach the seller’s solicitor before the banks’ same-day transfer cut-offs of roughly 3pm to 5pm. This banking constraint is also why exchanges don’t happen in the evening or at weekends. In short, usually late morning to early afternoon.
Is exchange of contracts legally binding?
Yes. Exchange of contracts is the exact point a property sale becomes legally binding in England and Wales. Before exchange, either the buyer or seller can withdraw without any legal penalty. After exchange, both parties are legally committed to completing on the agreed date. A buyer who pulls out after exchange typically forfeits their entire deposit and can face a claim for damages; a seller who withdraws can be sued for breach of contract. If either party fails to complete on the agreed date, the other can serve a Notice to Complete, giving usually 10 working days to finalise with penalty interest. This binding nature is why it’s called the point of no return.
How much deposit do you pay at exchange of contracts?
The exchange deposit is traditionally 10% of the purchase price, though 5% is common in practice, particularly for first-time buyers, and the amount is negotiable. It must be in your solicitor’s account as cleared funds before exchange can take place, and is transferred to the seller’s solicitor who holds it until completion. This exchange deposit is different from, but part of, your overall mortgage deposit — the cash you’ve saved goes toward it, with the remaining balance paid at completion alongside the mortgage funds. If your saved deposit is below 10%, your solicitor can usually arrange a reduced exchange deposit, which is routine.
How long after exchange of contracts is completion?
The gap between exchange and completion is typically 7 to 14 days, with around 7 days being common, though there is no legal minimum or maximum. It can be same-day — an exchange and completion together, common with chain-free cash buyers — or several weeks if someone needs more time. The gap is simply whatever both parties agree and write into the contract at exchange. Completion most often takes place on a Friday, giving everyone the weekend to move, though mid-week completions can sometimes be quicker on the day and cheaper for removals. The completion date is fixed and legally binding once contracts are exchanged.
Do I need insurance from exchange or completion?
From exchange. This catches many buyers out: risk passes to you at exchange of contracts, not at completion, so you become legally responsible if anything happens to the property from the moment contracts are exchanged. That means buildings insurance must be in place from the exchange date, not the completion date. Your solicitor will typically confirm this is arranged before agreeing to exchange. The one common exception is a leasehold flat, where buildings insurance is often arranged by the freeholder as part of the service charge — but you should always check this rather than assume it, to avoid a dangerous gap in cover during the period between exchange and completion.
- HomeOwners Alliance — Exchange of contracts explained
- MoneyHelper — free, government-backed money guidance
Important information
nextmove is an introducer, not a solicitor, conveyancer, lender or adviser. This article is general information only and does not constitute legal or financial advice. The process and timings described apply to England and Wales (Scotland’s system, using missives, differs significantly) and are typical rather than guaranteed — every transaction varies by property, chain, lender and circumstances. Deposit percentages and timelines are conventions that can be negotiated. We introduce you to FCA-regulated, whole-of-market mortgage brokers who can help keep your mortgage on track to exchange, and we may receive a fee or commission for doing so.
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