Question 1

How long does a mortgage offer last?

Accepted Answer

Most mortgage offers in the UK are valid for 6 months from the date of issue, though the exact period varies by lender. Some lenders issue offers valid for only 3 months; others issue offers valid for 6 months with the option to extend. For new-build properties, many lenders issue offers with a longer validity period — typically 6 months but sometimes 9 or 12 months — to allow for build completion timescales. The offer expiry date is stated in the mortgage offer document itself. Your solicitor or conveyancer will track this alongside the expected completion date and alert you if there is a risk the offer will expire before completion.

Question 2

Can I extend a mortgage offer that is about to expire?

Accepted Answer

Many lenders will grant an extension if requested before the offer expires, particularly where the delay is beyond the borrower's control (for example, a delayed new-build completion or a slow conveyancing chain). Extensions are not guaranteed — they are at the lender's discretion. If the extension is granted, the lender will typically recheck your credit file to confirm no material changes (new credit, missed payments) have occurred since the original offer. In some cases the lender may also require updated income evidence, particularly for self-employed borrowers whose most recent accounts may now be older than at the time of the original application. Contact your broker well in advance of expiry — at least 6–8 weeks before — to allow time for the extension request to be processed.

Question 3

What happens if my mortgage offer expires before completion?

Accepted Answer

If your mortgage offer expires before you complete on the property purchase, you will need to apply for a new mortgage. This is not simply an extension of the original offer — it is a full new application, subject to current underwriting criteria and current interest rates. Rates may have changed since your original offer was issued. Your financial circumstances will be reassessed: if your income has changed, your credit profile has changed, or new underwriting criteria have been introduced, the outcome may differ from your original offer. For self-employed borrowers, a lapsed offer that leads to a new application could mean the lender now requires one year's more recent accounts than those used for the original application.

Question 4

Why do new-build mortgages often have longer offer validity periods?

Accepted Answer

New-build completions are subject to construction delays — weather, supply chain, planning variations, and build programme changes can all push back the expected completion date. Lenders who are active in the new-build market have adapted their offer periods to accommodate this uncertainty. Many will offer a 6-month validity period as standard, with the ability to extend in 3-month increments if the build is delayed — subject to fresh checks at each extension. Some specialist new-build lenders offer up to 12-month offer validity. If you are buying a new-build property, confirm at application stage what the lender's policy is on offer extensions so you understand your position if the build completion date slips.

Question 5

Will I need to reapply for a mortgage if my circumstances have changed since the original offer?

Accepted Answer

If your mortgage offer has expired and you need a new application, the lender will conduct a full reassessment. If your circumstances have changed materially — for example, you have taken out additional credit, your income has fallen, you have changed jobs, or you have had a missed payment — these changes will affect the outcome. For self-employed or complex income borrowers, a new application may require more recent income evidence: if your previous offer was based on two years' accounts to a certain date, the new application may assess more recent accounts that reflect a different income level. Work with your broker to understand how any changes since the original offer might affect affordability and lender choice before reapplying.

Question 6

Does a mortgage offer expiry affect self-employed borrowers differently?

Accepted Answer

Self-employed borrowers face additional complexity when offers expire because income evidence dates matter significantly. For example, if your original mortgage offer was issued in July based on accounts to April (two tax years complete), and the offer expires in January, a new application in January may require accounts to the most recently completed tax year — which may show a higher or lower income than the previous year. Lenders who required two years of accounts for the original application will still require two years for the new application. Additionally, if business performance has been variable, the "averaging" approach used by some lenders may produce a different figure. Ask your broker to model the impact on affordability before the offer expires so there are no surprises if a fresh application is needed.

Mortgage Offer Expiry FAQ