Your own sale is still alive, not dead — your buyer hasn't pulled out, their chain has just slipped behind schedule, and the seller of the property you're buying has responded by setting a hard deadline. That's a genuinely different problem to a collapsed chain, and it has two possible answers: ask for more time, or bridge the gap with short-term finance while your sale catches up. Which one is right depends on how close your own sale actually is.
This is not the same problem as a dead sale
It's worth being precise about what's actually happened, because the right response depends on it. If your buyer had pulled out entirely, you'd be starting again from scratch, remarketing your property with no live buyer at all. That's not your situation. Your buyer is still there, still committed, and their purchase of your property is still moving, just more slowly than the seller of your next home is prepared to tolerate.
Sales slip for reasons that have nothing to do with whether the deal will ultimately complete. A buyer further up or down the chain is waiting on their own mortgage offer. A survey has thrown up a query that needs a follow-up valuation. Local authority searches are taking longer than the conveyancer quoted. None of these are signs the sale is failing — they're signs it's running on solicitor and lender timescales that don't care about the date your own seller has picked.
The seller of the property you're buying doesn't necessarily know or care about that distinction. From where they're sitting, a completion date has passed or is about to, and they want certainty. Your job is to give it to them, either by buying time or by removing your dependency on their patience altogether.
Ask for the extension first
Before you look at bridging loans, it's worth asking whether a straightforward extension gets you there more cheaply. If your own sale is genuinely close, exchanged and just waiting on a slightly delayed completion date, or under offer with a mortgage offer already issued to your buyer, a short extension is often the more sensible answer, and it costs you nothing beyond the seller's goodwill.
A credible extension request needs three things: a specific, realistic new date rather than a vague "soon", evidence your own sale genuinely supports that date (your solicitor confirming your buyer's mortgage offer is in place, or that exchange has already happened and you're waiting on completion), and an explanation of what's actually causing the delay so the seller understands it's not indefinite. Sellers who are themselves in a chain, buying onward, are often more sympathetic to this than a seller who has no onward purchase and simply wants their money.
An extension isn't guaranteed. Some sellers will say no regardless of how solid your evidence is, particularly if they're under their own pressure or have another interested buyer waiting in the wings. If that happens, or if your own sale — while alive — genuinely can't be pinned down to a date the seller will accept, that's the point where a bridging loan for a delayed sale becomes the more realistic option.
When bridging is the better answer
A bridging loan removes your dependency on the seller's patience entirely. Instead of asking them to wait for your sale to complete, you borrow against your existing property (or the one you're buying) to fund the purchase now, and repay the bridging loan once your sale actually completes, whenever that turns out to be.
This is usually the stronger option in three situations: the seller has refused an extension outright, your own sale's timeline is too uncertain to put a confident date on even though it's progressing, or the deal you're buying is valuable enough — a property you don't want to risk losing, or one where remarketing and starting again would cost more in time and stress than the bridging interest would cost in cash. Bridging isn't free, and it isn't the answer for every delayed sale, but where the numbers and the timeline point that way, it converts an uncertain, seller-dependent situation into one you control.
What happens if neither option lands in time
If you don't secure an extension and don't have a bridging loan in place by the seller's deadline, the consequences follow the same legal mechanism as any missed completion. The seller can serve a notice to complete, which typically gives a further ten working days. Interest usually starts accruing on the purchase price at a contractual rate from the original completion date, set out in the contract itself and typically well above a standard mortgage rate — ask your solicitor to confirm the exact figure at exchange, not after. If you still can't complete once that notice period expires, the seller can rescind the contract and keep your deposit, typically 10% of the purchase price under the Standard Conditions of Sale used in most residential transactions.
None of this is inevitable the moment a deadline passes. Many sellers, particularly ones without their own onward purchase riding on it, would rather agree a short further delay than go through the cost and disruption of rescinding and remarketing. But the legal mechanism is real, so treat the deadline as fixed and any flexibility from the seller as a bonus, not your plan.
Your options compared
| Option | Speed | Typical cost | Best suited to |
|---|---|---|---|
| Request an extension from the seller | Days, if agreed | Minimal, possibly none | Your own sale is exchanged or has a mortgage offer in place, and can genuinely complete soon |
| Bridging loan against your existing property | 10-14 working days once instructed | Arrangement fee plus monthly interest, both indicative until confirmed at enquiry | Extension refused, or your sale's timing is too uncertain to promise a date |
| Ask your onward mortgage lender for flexibility | 2-4 weeks typically | Standard mortgage rate | Rarely fast enough for a live deadline situation |
| Walk away from the purchase | N/A | Loss of deposit and fees already spent | The property isn't worth the cost or risk of holding onto it |
For most people in this position, with a live sale that's simply running behind and a firm deadline from the seller, the choice really is between these first two rows. Everything else on this list either moves too slowly to matter or means giving up a purchase you've already committed money and time to.
How a bridging loan works for this situation
Because you or an immediate family member will occupy the property you're buying, or the property used as security, this is almost always FCA-regulated bridging, which we arrange through our regulated bridging loan service. That means the lender must carry out proper affordability checks, you get access to the Financial Ombudsman Service if something goes wrong, and the lender has to communicate clearly on fees, rates and risk before you commit. It also generally means a slightly more thorough underwriting process than unregulated commercial bridging, so build in a realistic timeline rather than expecting same-day funding.
The realistic timeline once you're fully instructed: day 1-2 is application and instructing a valuer, day 3-6 is the valuation being carried out, day 5-10 is legal work running in parallel with your solicitor handling title checks and the facility documentation, and day 10-14 is completion and funds transfer. This holds broadly true whether you're buying in Glasgow or Bristol, though local valuer availability can shift things by a day or two either way.
Because your exit here is a sale that's already live rather than one you need to start from scratch, your evidence for the lender looks different to a dead-chain case. What matters most is proof your own sale is genuinely close: confirmation from your solicitor of where it's up to, evidence of your buyer's mortgage offer if one's been issued, and a realistic explanation of what's actually causing the hold-up. A lender assessing "my sale is progressing but slow" wants to see that progress documented, not just asserted.
What it actually costs
Bridging loans are priced monthly, and the gross-versus-net distinction catches out most first-time borrowers. Say you need £150,000 to complete your onward purchase, secured against your existing property, which is worth £320,000 with no mortgage outstanding.
| Cost item | Amount |
|---|---|
| Gross loan requested | £150,000 |
| Arrangement fee (around 2%, confirm at enquiry) | £3,000, deducted from the advance |
| Monthly interest (indicative, confirm at enquiry) | Typically in the region of 0.5%-1.5% per month depending on the lender, property and your circumstances |
| Interest retained for an expected 3-month term (rolled up) | Varies with the rate agreed — ask for this figure in cash terms before you commit, not just as a percentage |
| Valuation and legal fees | Several hundred pounds each, property and solicitor dependent |
| Net loan actually received | Less than the £150,000 gross figure once fees and retained interest are deducted |
The gross loan is the figure the lender quotes you. The net loan is what actually lands in your solicitor's account once the arrangement fee and, if interest is rolled up rather than paid monthly, the retained interest are deducted upfront. If you need £150,000 to complete, you'll likely need to apply for a gross facility somewhat higher than that once fees and retained interest are accounted for — ask your broker to work through the exact figure rather than assuming the number you need is the number to apply for.
There's a second sizing point specific to buying before your own sale completes: you'll own both properties, however briefly, until your sale actually closes. Depending on where the property is, that can trigger an additional property purchase tax or surcharge — the rules and rates differ across England, Scotland and Wales — payable within days of completion rather than reclaimable until your own sale proceeds come through. Ask your solicitor to confirm the figure early and make sure your broker knows about it when sizing the loan, so it's part of the plan rather than a surprise on completion day.
All figures here are indicative and will vary by lender, your credit profile, the property and current market conditions. Confirm exact terms at enquiry rather than treating this example as a quote. You can compare current bridging loan rates in the UK for context on where pricing typically sits, and it's worth checking the best bridging loan lenders in the UK for this kind of onward purchase bridge before you approach a broker.
Your exit strategy
Your exit here is the completion of your own, already-live sale — which is a stronger starting position than remarketing from nothing, but lenders will still want it evidenced properly rather than taken on trust.
The strength of your case depends heavily on exactly where your sale is. Exchanged and simply waiting on a delayed completion date is the strongest position — the sale is legally committed, and it's really just a timing question. Under offer with your buyer's mortgage offer already issued is next strongest. Under offer with your buyer still waiting on their own mortgage application is weaker, because there's genuine uncertainty about whether and when it completes, not just when.
Get your solicitor to write a short, factual summary of exactly where your sale stands and what's causing the delay — this single document does more to speed up underwriting than almost anything else you can provide, because it lets the lender assess the real risk rather than working from a verbal description. If your buyer's own chain is the cause of the delay, ask your estate agent or solicitor whether they can get any indication from further up the chain about realistic timing, even an informal one, and pass that on too.
The same principle holds wherever you're buying — whether that's an onward purchase in Leeds or Sheffield, a lender assessing a delayed-but-live sale wants the same solicitor-confirmed evidence, not a verbal reassurance that it's "nearly there". If you'd rather talk through your specific dates first, you can compare bridging loan options before committing to an application.
