Mortgage Agreement in Principle Expiry: What Happens Next in 2026/27
How long a UK mortgage agreement in principle lasts in 2026/27, what happens when it expires, and how to renew or reissue one during a property search.
Why AIPs have an expiry date at all
An agreement in principle is a lender's indicative assessment based on a snapshot of your circumstances and their lending criteria at a specific point in time. Because income, debts, credit profiles, interest rates, and lending criteria can all change, lenders build in an expiry period β commonly 60-90 days β after which the assessment is considered too stale to be relied upon without a fresh check.
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Open Mortgage calculatorWhat actually happens when it expires
Nothing dramatic β the AIP simply stops being valid for the purpose it was issued (supporting an offer, or being presented to an estate agent). There's no penalty, negative credit mark, or restriction created by letting one lapse. If you still need one, you request a new AIP, which the lender assesses against your current circumstances and their current criteria.
Worked example: a longer-than-expected house search
Situation: A buyer gets a soft-search AIP in January, valid for 90 days (expiring early April), showing a maximum borrowing capacity of Β£245,000. Their house search takes longer than expected, and they haven't found a property by early April when the AIP lapses.
What they do: They request a renewal from the same lender in April. Because their income and credit profile are unchanged, the renewal is straightforward and quick β but the lender's rates have moved slightly since January, and their updated stress-testing criteria now supports a marginally different maximum amount, Β£242,000, reflecting the small rate change rather than any change in the buyer's own finances.
Outcome: The buyer proceeds with the updated Β£242,000 figure when they do make an offer a few weeks later, avoiding the risk of relying on an outdated figure that no longer reflected current lending conditions.
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Open Mortgage Affordability calculatorPractical approach to managing AIP timing
- Get an AIP once you're seriously starting your search β most estate agents expect to see one before accepting an offer, particularly for competitively priced or popular properties
- Track the expiry date given when the AIP is issued, and diarise a reminder a couple of weeks before it lapses if your search is ongoing
- Renew proactively rather than waiting until you've found a property and need it urgently β a renewal usually takes only a day or two if your circumstances are unchanged, but building in a small buffer avoids delay at a critical moment
- Flag any changed circumstances (new job, new debt, a missed payment) to your broker or lender before renewing, since these could affect the updated figure
Does it matter which lender you renew with?
Not necessarily the same one β if your circumstances have shifted, or if a different lender now offers better rates or criteria, there's no obligation to renew with the original AIP provider. Many buyers shop around again at renewal time, particularly if enough time has passed that market rates have moved meaningfully.
The bottom line
An expired agreement in principle is a routine, low-stakes event, not a setback β it simply means the lender's assessment needs refreshing to reflect current circumstances and market conditions. Keeping track of the expiry date and renewing before you need to rely on it again keeps your house search moving smoothly without any awkward moment of an estate agent rejecting an outdated figure.
Frequently asked questions
How long does a mortgage agreement in principle typically last?
Most agreements in principle (AIPs) are valid for 60-90 days, though this varies by lender, with some offering shorter or slightly longer validity periods. After this point, the AIP expires and can no longer be relied on for making an offer.
What happens if my AIP expires before I find a property?
You simply need to request a new one, either by reapplying with the same lender or getting a fresh AIP elsewhere. If your circumstances (income, credit profile, existing debts) haven't changed significantly, this is usually a quick, straightforward process.
Does renewing an expired AIP involve another credit search?
It depends on whether the lender uses a soft or hard search for their AIP process, and whether their system treats a renewal as a fresh application. If the original was a soft search, a renewal is also likely to be a soft search with no credit score impact, but always check with the specific lender.
Can I still use an expired AIP to make an offer on a property?
No β estate agents and sellers typically ask for a current, valid AIP as part of your offer, and a lapsed one won't be accepted as evidence of your borrowing capacity, since it no longer reflects the lender's current willingness to lend based on up-to-date criteria and rates.
Will my AIP amount change if I renew it after it expires?
Potentially yes β if your income, existing debts, or credit profile have changed since the original AIP, or if the lender has updated their lending criteria or interest rates, a renewed AIP could show a different (higher or lower) maximum borrowing amount than before.
Should I get a new AIP every time I make an offer on a different property?
Not necessarily every single offer, but if some time has passed since your last AIP, or if your circumstances have changed, refreshing it before a serious offer ensures the figure you're relying on is current and won't cause problems if challenged by the seller's agent.
Does an expired AIP affect my ability to get a full mortgage offer later?
No β an expired AIP is simply an indicative assessment that's no longer current; it doesn't create any negative mark or restriction on your ability to apply for a fresh AIP or proceed straight to a full mortgage application when you're ready.
Is it better to wait until I've found a property before getting an AIP?
Not necessarily β many buyers get an AIP early in their house search since estate agents often require one before accepting viewings or offers on more sought-after properties, and a soft-search AIP costs nothing in credit terms, so getting one early and renewing if needed is a common, low-risk approach.
Can different lenders give different AIP validity periods?
Yes β validity periods vary by lender, commonly ranging from 30 to 90 days, so it's worth checking the specific expiry date given when you receive your AIP, rather than assuming a standard period applies across all lenders.
Does a mortgage rate change affect my expired AIP if I renew it?
Yes β a renewed AIP will reflect current rates and criteria at the time of renewal, not the rates that applied when your original AIP was issued, which is particularly relevant if rates have moved meaningfully in the intervening period.
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