Mortgage rate warning as cheap deals disappear within days

The latest Moneyfacts UK Mortgage Trends Treasury Report found the average mortgage product shelf-life fell to 13 days in September, down from 14 days in August.

Although that is above the record low of just eight days recorded in April, the figures highlight how quickly borrowers' options can change as lenders respond to fluctuations in funding costs.

So far in 2026, the average mortgage deal has remained on the market for just 15 days, according to Moneyfacts data covering January to September.

That compares with an annual average of 20 days in 2025, 22 days in 2022 and 43 days in 2019.

Key stats for mortgages this month

• 13 days: Average mortgage deal shelf-life in September.
• 15 days: Average shelf-life across January to September 2026.
• 5.93%: Average two-year fixed mortgage rate in October.
• 5.95%: Average five-year fixed mortgage rate in October.
• 5.83%: Average new mortgage rate in October, up from 5.55% in September.

The sustained volatility has been linked to movements in swap rates, which influence the cost to lenders of funding fixed-rate mortgages. Changes can prompt banks and building societies to reprice deals or withdraw them altogether.

Mortgage rates rise as deals become harder to secure

Moneyfacts' latest figures also show average mortgage rates increased in October.

The average two-year fixed-rate mortgage across all loan-to-value bands rose from 5.59% in September to 5.93% in October.

The average five-year fixed rate increased from 5.63% to 5.95% over the same period.

For borrowers with a 10% deposit, the average two-year fixed rate climbed from 5.80% to 6.15%, while the average five-year deal rose from 5.70% to 6.04%.

Those with a 40% deposit also faced higher average rates. Two-year fixes increased from 5.11% to 5.42%, while five-year fixes rose from 5.40% to 5.60%.

Moneyfacts' average new mortgage rate reached 5.83% in October, up from 5.55% in September.

‘The most challenging mortgage market in modern records’

Adam French, head of consumer finance at Moneyfacts, said borrowers and brokers were facing an exceptionally difficult market.

He said: "Brokers and borrowers are navigating the most challenging mortgage market in modern records. Not only have rates been jumping up and down but the deals available today may not be here tomorrow either.

"The average mortgage product is lasting just 15 days on the market so far this year. That leaves borrowers with a much tighter window in which to find, compare and secure a competitive deal compared to any other on record. Previous events, such as the mini-Budget and the COVID pandemic, caused considerable disruption, but the prolonged nature of the volatility we have seen so far this year stands alone."

Mr French said economic uncertainty linked to the war in the Middle East had affected swap rates and, in turn, the cost of funding fixed-rate mortgages.

He added: "A borrower who finds a competitive deal may find it has been withdrawn before they are ready to press ahead, while those who delay could face a different rate when they return to the market."

However, he cautioned borrowers against blaming themselves if rates changed after they made a decision.

"Global uncertainty is making it hard to act with confidence – for many borrowers it is more a case of luck than judgement," he said.

The markets expect four UK base rate rises within the next year. So interest rates are volatile and on the up. Millions have mortgage deals ending, if that’s you, this is a key timing tip to talk to a mortgage broker about. Courtesy of a @ThisMorning phone-in. https://t.co/eNvKhl1GtU

— Martin Lewis (@MartinSLewis) September 30, 2026

Ian Harris, President of NAEA Propertymark (National Association of Estate Agents), adds: “These latest findings highlight just how challenging the mortgage market has become. Continued volatility in swap rates is forcing lenders to reprice or withdraw products at short notice, creating added pressure for both borrowers and brokers.

“For borrowers, the key is to be prepared and seek advice early, particularly if their current fixed-rate deal is coming to an end. While it is difficult to predict where rates will go next, speaking to a mortgage broker can help borrowers understand their options and secure a suitable deal before it disappears.

"Crucially, decisions should be based on overall cost, affordability and individual circumstances, rather than simply chasing the lowest headline rate or trying to time the market.”

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What should borrowers do if their mortgage deal is ending?

Anyone approaching the end of a fixed-rate mortgage should consider their options early, Mr French said.

He advised borrowers to speak to a mortgage broker and check which deals are available to them.

"Many lenders allow borrowers to secure a new deal three to six months before their existing one ends, which can give some insurance against further rate rises," he said.

Borrowers should also compare the overall cost of a mortgage rather than focusing only on the headline interest rate, taking account of fees and any conditions attached to an offer.