Most mortgage offers in the UK are valid for 3 to 6 months from the date of issue. The exact duration can vary depending on your mortgage lender, whether you are buying or remortgaging, and whether the property is a new build.
Key takeaways
- Most UK mortgage offers last 3 to 6 months. Most high street lenders give 6 months on a standard purchase.
- New-build mortgage offers can last 9 to 12 months with some lenders, with extensions available.
- Remortgage offers are often shorter, around 90 days.
- Specialist lenders (adverse credit, complex income) typically give 2 to 4 months.
- If your offer is nearing expiry, contact your lender at least 4 weeks before the expiry date to request an extension.
- If your offer expires, you will usually need to reapply, which may involve a new valuation (£150- £400) and a fresh credit check.
When you get a mortgage offer from a high street lender on a standard residential purchase, it is typically valid for 6 months. Remortgage offers tend to be shorter, often around 3 months. New-build mortgage offers are usually the longest, with some lenders offering 9 months or more to accommodate construction delays.
The validity of your mortgage offer can start from different points depending on the lender’s policy. Some count from the application date, others from the date the offer is issued. You will find your specific mortgage offer deadline on your formal offer letter, so always check which applies to you.
If your offer is close to expiring, give us a call on 033 0088 4407. We help clients in this exact situation every week.
How long do major UK mortgage lenders keep offers open?
Offer validity varies significantly between lenders. Below is a comparison of major UK mortgage lenders based on industry data from the Legal & General Mortgage Club, which we work with as a whole-of-market broker.
| Lender | Standard Purchase | Remortgage | New Build |
|---|---|---|---|
| Accord | 6 months | 6 months | 6 months + 6 month extension |
| Aldermore | 3 months | 3 months | 6 months |
| Barclays | 6 months from application | 6 months from application | 6 months + 6 month extension (new build only) |
| Bank of Ireland | 6 months | 6 months | 9 months + 6 month extension |
| Clydesdale | 180 days | 180 days | 180 days |
| Coventry Building Society | 6 months | 6 months | 6 months |
| Generation Home | 180 days | 180 days | 180 days |
| HSBC | 180 days | 180 days | 180 days |
| Metro Bank | 5 months | 5 months | 9 months |
| Nationwide | 6 months + 15 day grace period | 6 months + 15 day grace period | 6 months + 45 day extension available |
| Platform | 6 months from application | 6 months from application | 6 months from application |
| Santander | 6 months or until product deadline | 6 months or until product deadline | 6 months or until product deadline |
| Skipton | 6 months | 6 months | 9 months + 3 month extension |
| The Mortgage Works | 6 months + 15 day grace period | 6 months + 15 day grace period | 6 months + 45 day extension available |
| TSB | 180 days | 180 days | 180 days + 180 day extension |
| Virgin Money | 6 months | 6 months | 7 months |
Source: Legal & General Mortgage Club. Always confirm the current policy with your lender or broker, as criteria can change.
What about specialist mortgage offers?
Specialist mortgage lenders, such as those who deal with adverse credit, complex income, or non-standard properties, often have shorter offer validity periods than mainstream lenders. Many specialist mortgage offers are valid for only 2 to 4 months from the date of issue. This is because specialist lenders price for risk under tighter market conditions, so they want to limit their exposure to market changes.
If you are using a specialist lender, the shorter window makes choosing the right conveyancer and keeping the application process moving even more important. We can advise on which specialist lenders have the most workable validity periods for your situation.
What is the 6 month rule for mortgages?
The “6 month rule” refers to the standard 6 month validity period most UK lenders apply to mortgage offers. Once your offer is issued, you typically have 6 months to exchange contracts and complete the purchase. If you do not complete within that window, the offer expires, and you will usually need to reapply.
The rule is not a legal requirement. It is each lender’s internal policy, designed to limit their exposure to changes in your circumstances, the market, or the property value.
Does a mortgage offer mean the mortgage is accepted?
Yes. A formal mortgage offer is the official confirmation from your lender that they will lend you the agreed amount, subject to the conditions in the offer letter. It is the lender’s binding commitment, not a “maybe”.
This is different from a mortgage in principle (sometimes called a decision in principle or agreement in principle), which is just an early indication based on a soft credit check. The full mortgage offer comes later in the application process, after the lender has carried out a property valuation, completed underwriting, and verified your income, bank statements and outgoings.
Why might a mortgage offer expire before completion?
You would think 6 months is plenty of time to complete a property purchase. In our experience as mortgage brokers, that is not always the case. The most common reasons offers run close to expiry are:
Conveyancing delays
Slow solicitors, missing searches, miscommunication between parties, or solicitors being on holiday are the single biggest cause of completion delays we see. If your conveyancer is unresponsive or the seller’s solicitor is dragging their feet, weeks can disappear quickly. The legal work involved in a property purchase is often more complex than buyers expect, particularly for a first time buyer going through it for the first time.
Property chain problems
If your purchase is part of a chain, you are at the mercy of every other buyer and seller in it. One person pulling out, one slow solicitor, one survey issue further up or down the chain, and the whole timeline shifts.
New build construction delays
Material shortages, adverse weather conditions, labour issues and developer scheduling problems can push completion dates back by months. This is why most lenders give longer offer periods on new builds, but even those can run out.
Property valuation problems and delays
If the lender’s valuer downvalues the property, finds something concerning during the inspection, or does not arrange the valuation in a timely manner, the application may need to be reworked or restarted. Either eats into your offer window. A drop in property value can also lead the lender to alter or withdraw the offer entirely.
Changes in your circumstances
If your financial situation changes during the offer period, for example, your income drops, you take on more debt, or you change jobs, the lender may need to reassess. Significant changes can lead to the offer being withdrawn before it expires.
Economic and market changes
Rising interest rates or wider market shifts can prompt lenders to review offers. While this is rare for offers already issued, it does happen during periods of significant rate movement.
Errors in the original application
Even a typo, missing personal details, or an incorrect figure on the original mortgage application can cause the lender to pause and review, sometimes weeks after the offer was issued.
If any of these are happening to you right now, the earlier we know about it, the more options we have. Get in touch and we will work out the best route forward.
How to extend your mortgage offer
Yes, most lenders will consider extending your mortgage offer, but it is not automatic. Proactive communication with your lender is key. We recommend contacting them at least 4 weeks before the expiration date.
When you request an extension, the lender will typically run a re-underwriting check on your current financial situation. They will want to see:
- Updated proof of earnings (recent payslips, or accounts if you are self-employed)
- Recent bank statements
- Confirmation that your financial circumstances have not significantly changed
- An up-to-date credit report or credit check
- A reason for the delay, ideally backed up in writing by your solicitor
Most lenders waive admin fees for a simple mortgage offer extension, but if a new valuation is required, this can cost between £150 and £400, depending on the property value and lender.
A typical extension is around an additional month, but some lenders allow extensions of 3 months or more under certain circumstances. Nationwide and The Mortgage Works offer a 15-day automatic grace period plus a separate 45-day extension on new builds. Bank of Ireland will extend new build offers by up to 6 months. TSB allows a full 180-day extension on new builds.
Can a mortgage offer be renewed more than once?
Some lenders will renew or extend a mortgage offer multiple times, others will not. Lenders like Newcastle Building Society, Pepper Money and Precise allow rolling extensions, where you can request additional one-month extensions repeatedly, provided your circumstances remain stable.
Most mainstream lenders will only consider a single extension. If you need more time after that, you are usually looking at a fresh application.
What if your mortgage offer extension is refused?
If the mortgage lender refuses your extension request, it is usually for one of these reasons:
- You applied too late. Most lenders need notice well before the expiration date. Leaving it to the final week often means the answer is no.
- Your financial circumstances have changed. A new debt, a drop in income, or a change of job can all trigger a refusal.
- The lender’s policy has tightened. If interest rates have moved significantly or the lender has changed criteria, they may not extend.
- The offer has already expired. Once it lapses, most lenders will not reinstate it.
If your extension has been refused, you have two main options:
- Reapply with the same lender. If your circumstances are unchanged, this is often the path of least resistance, although you may need to pay valuation and legal fees again.
- Apply with a different lender. If rates have moved or your situation has changed, a different lender might offer a better mortgage deal anyway.
This is where a whole-of-market mortgage broker earns their keep. We can search across 90+ lenders and find the one most likely to approve you quickly.
One of our clients had their extension refused last year because they had taken on a new car finance agreement during the offer period, which pushed their debt-to-income ratio above the original lender’s threshold. We found a lender with more flexible affordability criteria and got them a new offer within 3 weeks. They completed on time.
What to do if your mortgage offer has expired
If your offer has expired and no extension has been granted, do not panic. Losing your dream home is not a foregone conclusion. Take these four steps in order:
1. Contact your lender immediately
The first call should be to your lender. In some cases they will allow a late extension if delays were beyond your control. Even if the answer is no, knowing where you stand quickly is essential.
2. Inform your solicitor and estate agents
Your solicitor and the estate agents need to know the situation has changed. They can help manage communication with the seller and prevent the chain from collapsing while you arrange a new mortgage offer.
3. Speak to a mortgage broker
A broker can quickly identify which lenders are most likely to approve you and at what rate. If you originally applied through us, we already hold your details and can move fast.
4. Prepare for the reapplication process
Reapplying means a fresh credit check, a new valuation, updated documents, and potentially extra costs including new application fees, a new valuation fee (usually £150-£400), and additional solicitor’s fees for any work that needs redoing. Different interest rates may also apply if the market has moved.
One of our clients had their offer expire in late 2025 due to a chain delay. By the time we resubmitted with a different lender, rates had improved, and they ended up on a better mortgage deal than the one they originally had. It does not always work out that way, but it is more common than people think.
What if your mortgage offer expires between exchange and completion?
This is one of the most stressful situations in the home-buying process. You have exchanged contracts, you are legally committed to buying, and your mortgage offer is about to expire before completion day.
The good news: this is rare because the time between when you exchange contracts and completion day is usually a short window (often just a couple of weeks). The bad news: if it does happen, you are exposed.
If your offer expires in this window, contact your lender immediately. Most will work with you to extend or reissue the offer, especially if the exchange of contracts has already happened. They do not want a deal to fall through any more than you do. Your broker should drive this conversation, escalate quickly, and if needed, line up a backup lender at the same time.
We had a case last year where a client’s lender’s systems were down for maintenance the week their offer was due to expire, just two days before completion. We escalated to the lender’s broker support team directly, got a verbal extension confirmed within hours, and the written extension followed the next morning. Completion happened on schedule.
Can your mortgage offer be withdrawn before it expires?
Yes. A lender can withdraw an offer at any point before completion if something material changes that affects your ability to keep up the monthly repayments. The most common triggers are:
- You lose your job, or your income drops significantly
- You take on new debts (a car loan, a credit card, an overdraft)
- The lender’s checks at completion stage flag something they had not seen before
- Fraud or inaccuracy is identified in the original application
- The new property valuation comes back lower than the agreed purchase price
- Your credit file or credit report changes, for example, a missed payment or a new default
Our advice during the offer-to-completion window is simple: do not change anything financially. No new credit cards, no big purchases on finance, no job changes if you can help it. Wait until you have the keys and your buildings insurance is in place.
What if your offer was accepted but the mortgage was declined?
You have had your offer on a property accepted, you are emotionally invested, and then the mortgage is declined. It happens for a number of reasons:
- The lender’s underwriter found something the initial decision did not flag
- The new property valuation came back significantly lower than the agreed purchase price
- Your circumstances changed during the application
- The property itself does not meet lender criteria (non-standard construction, short lease, etc.)
If this has happened to you, the first thing to do is find out exactly why. The reason matters because it determines what happens next. A property issue means we look at lenders with different criteria. A circumstances issue means we look at lenders with more flexible underwriting. A credit issue may mean we need a specialist lender.
How to reduce the risk of your mortgage offer expiring
Below are 5 ways to reduce the risk of your mortgage offer expiring:
1: Use a proactive solicitor
Not all conveyancers are equal. Cheap online services can be slow and hard to chase. A good local solicitor who answers the phone is worth their weight in gold on a tight timeline.
2: Stay on top of paperwork
If your solicitor or lender asks for something, send it the same day. Small delays compound into big ones.
3: Pick the right lender from the start
If you are buying a new build, choose a lender with a longer new-build validity period. If you are remortgaging on a tight deadline, pick one with a fast offer-to-completion track record. We factor this into our recommendations.
4: Communicate early when delays appear
The moment you suspect you might miss your deadline, tell your broker and your lender. Lenders are far more sympathetic to early warnings than late panic.
5: Keep your finances stable
Avoid taking on more debt, changing jobs, or making large discretionary purchases during the offer period. Anything that changes your file is a risk.
Mortgage offer timelines for specific situations
Offer timelines vary depending on the type of mortgage. Here’s what to expect.
Buy-to-let mortgage offers
Buy-to-let offers typically last 3 to 6 months, similar to residential. Some specialist BTL lenders only give 90 days. If the property has tenants in situ, or if rental valuations are needed, expect tighter timelines.
Remortgage offers
Remortgage offers tend to be shorter, often 90 days, although mainstream lenders like Halifax, HSBC and Santander typically give 6 months. Apply 3 to 6 months before your current deal ends to give yourself breathing room.
New build mortgage offers
New build offers are usually the longest. Lenders like Bank of Ireland (9 months + 6 month extension), Skipton (9 months + 3 month extension) and TSB (180 days + 180 day extension) are particularly generous. If you are buying a new build, this is worth factoring into your lender choice.
What documents will you need to reapply?
If you need to reapply for a mortgage loan, the documents are similar to the first time around, but the lender will want them updated:
- Proof of ID: passport or driving licence
- Proof of address: recent utility bill or council tax statement
- Proof of income: last 3 months’ payslips and most recent P60. If self-employed, 2-3 years of tax returns or accounts
- Bank statements: usually the last 3 months
- Proof of deposit: savings statements, gifted deposit letter if applicable
- Records of debts and outgoings: credit cards, loans, regular commitments
If you originally applied through us, we already hold most of this on file and can resubmit quickly with updated figures.
Frequently asked questions
How long is a mortgage offer valid for?
Most mortgage offers in the UK are valid for 3 to 6 months. New build offers can last up to 9 months with some lenders, and remortgage offers are often 90 days. Specialist mortgage offers can be as short as 2 to 4 months.
How long after a mortgage offer is issued to completion?
Most buyers complete within 2 to 3 months of the offer being issued, but it can be quicker or slower depending on the chain, the conveyancing process, and any issues that arise.
How quickly can you get a mortgage offer?
Once your full mortgage application, including all required documents, has been submitted, most mainstream lenders issue a formal offer within 2 to 4 weeks. Specialist lenders or complex cases can take longer.
Can you get an extension on your mortgage offer?
Yes, most lenders will consider an extension if requested in good time. Extensions are typically 30 to 90 days, but this varies depending on the lender, and your circumstances must remain unchanged.
How many times can you renew a mortgage offer?
Most mainstream lenders allow only one extension. Some lenders, including Newcastle Building Society, Pepper Money and Precise, allow rolling one-month extensions repeatedly.
What happens if a mortgage offer expires?
You will need to reapply, either with the same lender or a different one. New paperwork, a fresh valuation, a new credit check, and potentially extra costs will all apply. If rates have moved, your monthly repayments may change.
Will my credit score be affected if my mortgage offer expires?
The original mortgage application will already be on your credit report. Reapplying will add another search, but a single additional search is unlikely to cause significant damage.
Can a mortgage offer be withdrawn before completion?
Yes, if your circumstances change significantly, if the lender finds an issue during pre-completion checks, or if the property valuation is challenged.
Do I have to pay all the fees again if I reapply?
You may need to pay some fees again, particularly the valuation fee (usually £150-£400) and any product fees. Solicitors’ fees already paid usually do not need to be paid again, but additional legal work may incur other costs.
How YesCanDo Money can help if your mortgage offer is at risk
If your mortgage offer is close to expiring, has been refused an extension, or has already expired, we can help. As a fee-free mortgage broker who are whole-of-market we work with over 99 mortgage lenders and can:
- Approach your existing lender on your behalf to extend your mortgage offer
- Find an alternative lender quickly if an extension is refused
- Liaise with your solicitor and estate agents to push completion forward
- Handle the paperwork and resubmission so you do not have to start from scratch
- Find you a better mortgage deal than the one you originally had, where possible
We never charge a fee for our advice or our work.
Call us on 033 0088 4407 or request a callback and we will be in touch quickly.
