You've accepted an offer. You've started looking at removal companies. Then, weeks later, the buyer pulls out and you're back to square one.
It's more common than most people realise. According to TwentyCi's Property & Homemover Report, 23.7% of agreed UK sales fell through in the first quarter of 2026. That's close to one in four sales that never make it to completion. The good news is that most of the reasons behind that number are predictable, and largely avoidable, if you know what to look out for and get the right support early.
And if you're buying, the same risks apply to you. A collapsed purchase can cost you survey fees, legal fees and the home you'd set your heart on, so we've included tips for buyers under each reason too.
This shows just how much timing matters. The earlier legal work starts, the sooner problems surface, and the more time everyone has to fix them before they turn into a collapsed sale.
Physical problems found during a buyer's survey, from damp to structural concerns, are one of the biggest causes of collapsed sales. Survey issues were behind 27% of failed sales in Q2 2026, second only to mortgage and lending problems (Quick Move Now via The Intermediary). A buyer gets nervous, tries to renegotiate the price, or walks away entirely.
How to reduce the risk: deal with known issues before you list, be upfront about anything a survey is likely to flag, and make sure your conveyancer can respond quickly to a buyer's solicitor once a survey raises questions, rather than letting silence do the damage.
If you're buying: book your survey as soon as your offer is accepted, and choose the right level for the property. An older or unusual home usually needs a more detailed survey. If problems come up, speak to your conveyancer before you decide anything. A fair, evidence-based renegotiation often saves a sale that walking away would lose.
Cold feet account for a large share of failed sales, often linked to wider market nerves rather than anything wrong with the property itself.
How to reduce the risk: you can't control a buyer's confidence, but you can reduce the time they have to waver. The longer a sale drags on, the more opportunity there is for doubt to creep in. Getting LegallyReady before you accept an offer can cut weeks off that window.
If you're buying: cold feet usually come from surprises. Research the area, visit at different times of day and get your finances in order before you make an offer, so there's less to unsettle you once the legal work begins.
When one link in a property chain fails, everyone connected to it feels the impact, even if their own sale was progressing perfectly well.
How to reduce the risk: ask your estate agent for visibility on how the rest of the chain is progressing, not just your own transaction, so problems elsewhere don't blindside you. With DezrezLegal, you won't need to chase this yourself. Your dedicated conveyancer keeps you updated proactively, and you can track your own transaction's progress any time through your online portal. For more on this, read our guide on how to stop your property chain collapsing.
If you're buying: ask the estate agent how long the chain is and whether your seller has found their next home. If you're a first-time buyer or chain-free, you're in a strong position, so make sure the seller knows it.
A buyer's mortgage offer can fall through for all sorts of reasons: a lender's valuation coming in lower than expected, a change in the buyer's circumstances, or an offer simply expiring because the process has taken too long.
How to reduce the risk: speed matters here more than almost anywhere else. Mortgage offers have a shelf life, typically around six months, so anything that pushes a sale past that window increases the odds of it collapsing. Knowing each stage of the conveyancing process helps you spot delays early.
If you're buying: get a mortgage agreement in principle before you make an offer, and apply for your full mortgage as soon as your offer is accepted. Avoid big purchases, new credit or a change of job until you've completed, and check when your mortgage offer expires so you and your conveyancer can plan around it.
Some buyers wait until just before exchange to demand a lower price, knowing the seller has little legal recourse until contracts are signed.
How to reduce the risk: get to exchange as quickly as possible. Gazundering relies on a long gap between agreeing a price and legally committing to it, so closing that gap removes much of the leverage.
If you're buying: the risk on your side is gazumping, where the seller accepts a higher offer from someone else before contracts are exchanged. In England and Wales it's legal until exchange, so the best protection is the same as the seller's: instruct a conveyancer early and keep the process moving.
Time.
The longer a sale takes to reach exchange, the more chances a survey issue, a wobble in confidence, a chain problem, a lending delay or a renegotiation attempt has to derail it.
This is exactly why we built LegallyReady. Rather than waiting for a buyer before starting the legal groundwork, we prepare your contract pack and gather the information a buyer's solicitor will need in advance, so it's ready to issue the moment you accept an offer. It won't stop every risk on this list, but it can remove weeks from the process where a sale would otherwise sit exposed. Alongside that, you'll have a dedicated conveyancer from day one, so nothing gets lost between handovers.
In England and Wales, a sale becomes legally binding at exchange of contracts. Until then, an accepted offer is an agreement in principle only, and either the buyer or the seller can walk away without legal penalty.
That's why the time between agreeing a sale and exchanging matters so much.
They can, but it's costly. After exchange, both sides are legally committed. A buyer who pulls out will usually lose their deposit, which is typically 5% to 10% of the purchase price. The seller may also be able to claim for any further losses. Buyers rarely withdraw at this stage for exactly that reason.
Yes, up until exchange. A seller can withdraw for any reason, including accepting a higher offer from someone else, which is known as gazumping. After exchange, a seller who refuses to complete is in breach of contract and can face serious legal and financial consequences.
Gazundering is when a buyer lowers their offer just before exchange, knowing the seller may feel under pressure to accept rather than start again. It's legal in England and Wales, but you don't have to accept it. Read our guide on what gazundering is and how sellers can respond.
It varies with the length of the chain, how quickly searches come back and how fast the mortgage is approved. In Q1 2026, the average time from agreeing a sale to exchange was 134 days, about four and a half months (Quick Move Now via Business Cheshire). Preparing your legal paperwork early with LegallyReady can cut up to three weeks off that time.
If you're selling, your property goes back on the market, and you can often move faster the second time because much of the legal groundwork is already done. If you're buying, you may lose money already spent on surveys, searches and legal work. Ask your conveyancer about no completion, no fee cover before you start.
Whether you're buying or selling, we manage the legal side of your move from start to finish, with a dedicated conveyancer and transparent fees. For sellers, our free LegallyReady preparation closes the gap where most sales are lost. For buyers, we get your searches and enquiries moving from day one, so your mortgage offer and your moving date stay on track. You'll always know exactly where your move stands, and exactly who to call if something changes.
Ready to see how much faster your move could be? Get an estimate and let's get your contract pack moving today.
Figures reflect the latest published industry data as of September 2026 and are intended as general guidance, not legal advice.