2.3 Million Households Face Fixed-Rate Expiry in 2027. What Could the Next Mortgage Cost?

For households approaching the end of a fixed mortgage, the next interest-rate announcement matters. But the bigger question is how much of the family budget the replacement deal will absorb.

More than 2.3 million households are expected to leave fixed mortgage deals in 2027, according to UK Finance data reported by The Guardian.

The number describes the scale of next year’s renewal market. It does not mean every borrower faces the same increase. Someone leaving a low rate agreed several years ago starts from a different position from a household already paying a substantially higher rate.

Our recent article on rising remortgage approvals and deal-end dates examined the importance of preparing for renewal. The next step is to put figures around the decision: the new payment, the cost of changing lender and the consequences of stretching repayments over longer.

The payment change can be larger than the rate difference sounds

A move from 2% to 5% is a three-percentage-point increase. On a substantial mortgage balance, it can absorb several hundred pounds of monthly disposable income.

For illustration, take a £250,000 repayment mortgage with 25 years remaining. At 2%, the monthly payment would be approximately £1,059.64. At 5%, it would be £1,461.48, an increase of £401.84 a month.

That is around £4,822 more over a year, before any product or switching fees. The household does not need to be borrowing more, moving home or changing its lifestyle for that extra cost to arise.

The larger balance produces an annual increase of roughly £7,715. For higher-value borrowers, even a manageable mortgage can therefore become a significant budgeting decision when the fixed period ends.

These comparisons hold the outstanding balance and remaining term constant to isolate the effect of the rate. They do not assume every expiring mortgage carries a 2% rate, or that 5% will be available when a particular borrower renews.

Borrowers leaving different deals will feel different effects

Two neighbours with identical mortgage balances could have very different experiences in 2027. One may be leaving a cheap older fix; the other may already be paying something close to the replacement rate.

The first household faces a large adjustment even if it secures a competitive new deal. The second may see little change, or a reduction, depending on the products available at the time.

This is why a national renewal figure cannot tell an individual borrower what to expect. The useful starting point is the balance due at expiry, the rate being replaced and the years left to repay it.

Changes in household finances matter too. Higher earnings may help absorb the payment increase, while childcare, reduced working hours or other borrowing may leave less room than when the original mortgage was arranged.

A longer term lowers the bill by slowing repayment

When the new monthly payment looks uncomfortable, extending the mortgage term can appear an obvious answer. It can provide meaningful breathing space, but the saving needs to be understood alongside the debt that remains.

Using the same £250,000 balance and an assumed 5% rate, extending the repayment period from 25 to 30 years reduces the monthly payment from about £1,461 to £1,342. That is approximately £119 less each month.

Over the first two years, the longer term frees roughly £2,866 of cash flow. However, the balance after those two years would be about £242,434, compared with £239,427 on the shorter term: around £3,008 more still owed.

Those figures assume the rate remains 5% for the two-year comparison, with no fees or overpayments. The payment falls mainly because the borrower repays capital more slowly, not because the lender has reduced the rate.

That may be a worthwhile trade-off for a household facing a temporary squeeze. But it changes the repayment timetable, and keeping the longer term generally means paying more interest overall. Age, retirement plans and lender requirements also influence what is available.

A lower rate can still be the more expensive deal

Product fees create another complication. A lower headline rate can look attractive while saving too little interest to recover the fee charged to obtain it.

Consider two hypothetical two-year deals on a £100,000 repayment mortgage with 25 years remaining. One charges 5% with no product fee; the other charges 4.7% with a £1,999 fee paid upfront.

Over the two-year period, the fee-free deal would incur approximately £9,801 of interest. The lower-rate deal would incur about £9,205 of interest, but adding its fee takes the total to £11,204. It costs around £1,403 more despite the lower rate.

Increase the starting mortgage to £400,000 and the outcome reverses. On the same assumptions, the 4.7% deal saves approximately £386 after its fee over two years, because the interest reduction applies to a much larger balance.

This comparison counts interest plus the upfront fee, allowing for capital repaid rather than treating every monthly payment as a cost. It excludes other charges and cashback. In a real comparison, those details could change the result again.

The lesson for borrowers is practical: the best-looking rate on a search results page is not necessarily the least expensive option for their mortgage size.

The current lender belongs in the comparison

Renewing does not always require a move to another lender. An existing-lender product transfer may offer a suitable replacement deal, while a remortgage opens up alternatives elsewhere.

MoneyHelper’s remortgaging guidance recommends considering the available products alongside fees and affordability. Some product transfers can proceed without a new affordability assessment, whereas changing lender normally involves a fresh application.

That difference can matter to someone who has become self-employed, reduced their hours or experienced a change in household income. Their existing mortgage may have been comfortable for years, while a new lender assesses the application differently.

Staying is not automatically cheaper, and switching is not automatically better. A small rate advantage elsewhere can disappear once costs are included. Equally, a straightforward renewal should not prevent a borrower checking whether a suitable alternative offers a meaningful saving.

A rate decision cannot settle the whole mortgage decision

Trying to identify the perfect moment to fix can distract from questions the borrower can answer now. How much payment flexibility is needed? Is a move likely? Would an early repayment charge become a problem if plans change?

A household expecting to relocate in two years has a different decision from one intending to remain for a decade. Certainty over payments has value, but the length of a new deal should also fit what the borrower expects to do with the home.

Market expectations can change before and after a Bank of England announcement. A mortgage comparison therefore needs to use products actually available to the borrower, rather than treating a forecast as a guaranteed future saving.

Beginning that comparison before expiry creates time to examine the alternatives. It does not necessarily mean redeeming the existing loan early and paying a charge to leave it.

The useful review starts with the household’s numbers

For a borrower facing renewal, the most useful output is a clear comparison showing the new monthly payment, upfront costs, remaining balance and any restrictions on changing the arrangement later.

That can separate a payment problem from a pricing problem. One household may need a more suitable repayment timetable; another may simply be paying too much for a product whose fee structure does not suit its balance.

Willow can compare current-lender options with suitable remortgages and show how the choices affect both the household budget and the debt being repaid. For borrowers leaving older low rates, understanding that difference is more useful than another prediction about where interest rates go next.