More than 255,000 UK households are due to come off five-year fixed mortgage deals between April and June 2026, according to analysis citing UK Finance data, with June expected to be the busiest month of the quarter.

The figures, released by specialist lender Together, show that 75,700 five-year fixes worth £16.5bn are due to mature in April, followed by 74,820 loans worth a further £16.5bn in May and 104,570 worth £24.9bn in June.

That takes the total for the three-month period to 255,090 mortgages, with a combined value of £57.9bn.

Together said June is set to be the most concentrated month of the year for five-year fixed mortgage maturities, accounting for 10.5% of annual loan volumes and 11.2% of lending value.

Ryan Etchells, chief commercial officer at Together, said: “As these deals roll off, June is where expectations really change, when a further 67,000 loans worth £25bn mature.

“June alone accounts for 10.5% of loan volumes and 11.2% of lending value, making it the single most concentrated month of the year.”

He said: “That level of activity will intensify competition between lenders and put pressure on operational capacity, particularly as more borrowers actively refinance to avoid reversion rates.

“We should expect a higher proportion of borrowers shopping around rather than defaulting to reversion rates, especially given how aware consumers now are of repayment shocks.”

The lender also pointed to a larger refinancing wave next year, linked to borrowers who took out shorter-term deals ahead of the stamp duty deadline.

Etchells said: “Looking further ahead, next March is expected to be on a different scale altogether.

“The unusually high number of loans taken out ahead of the stamp duty means that when the two-year fixed period comes to an end, there will be double the volume of roll-offs from the previous March.”