A war 3,000 miles from London is showing up in British mortgage statements. The average homeowner taking out a new two-year fixed deal today will pay £788 more per year than they would have before US-Israel strikes on Iran began at the end of February. That increase has materialised in barely two weeks.

The figure, calculated by Moneyfacts based on a 25-year, £250,000 mortgage, traces a chain that runs from the Persian Gulf straight to the kitchen table: conflict drives up oil and gas prices, energy costs stoke inflation fears, swap rates spike, and lenders reprice their products upward. For those on five-year fixes, the annual hit is £651.

The Numbers That Moved

Two-year fixed rates have climbed from 4.83% in early March to 5.28% — their highest point since April 2025. Five-year fixes have risen from 4.95% to 5.32%. Both shifts represent the sharpest upward moves since the aftermath of the September 2022 mini-Budget.

The damage extends beyond pricing. Some 689 mortgage products have been pulled from the market since March 9, representing nearly a tenth of all available deals. Barclays, HSBC, NatWest, Nationwide, and Santander have all withdrawn their sub-4% fixed-rate offerings — deals that were on the shelf just a week ago.

The mechanics are straightforward. Two-year swap rates — the benchmark lenders use to price fixed mortgages — hit 3.60% last week, their highest since October. On February 27, the day before the strikes began, they sat at their lowest level since mid-2022. That whiplash has forced lenders to reprice at speed.

“Swap rates rose sharply earlier in the week as markets reassessed inflation risks linked to higher oil prices and geopolitical tensions,” said Nick Mendes, mortgage technical manager at John Charcol.

A Reversal of Fortune

The timing is particularly bitter. Before the war, the UK mortgage market was heading in the opposite direction. Falling inflation, softening economic growth, and rising unemployment had all pointed toward further Bank of England rate cuts. Markets had priced in roughly 50 basis points of reductions through 2026. Borrowers were being told the worst was behind them.

That narrative collapsed within days. The previously priced-in cuts have been fully unwound. Futures markets now show a 70% probability of a rate rise before year-end, with a 25 basis point hike the likeliest outcome — a complete inversion of expectations from three weeks ago.

The Bank of England is widely expected to hold its base rate at 3.75% when it meets on Thursday. Thomas Pugh of RSM UK was blunt: “A cut clearly makes no sense now.” The Office for Budget Responsibility has warned that a sustained energy spike could add a full percentage point to UK inflation this year — precisely the scenario that would keep rates elevated for months.

Kitchen Table Consequences

The immediate pain falls hardest on those who need to remortgage now, or first-time buyers entering the market. Existing homeowners on tracker or variable-rate mortgages face potential increases if the Bank eventually raises rates, but for anyone locking in a new deal today, the maths has already changed.

Mary-Lou Press, president of NAEA Propertymark, has flagged particular concern for first-time buyers facing an already stretched affordability picture now compounded by geopolitical forces entirely outside their control.

Major lenders are not waiting for clarity. HSBC has repriced twice in two weeks. TSB implemented a 50 basis point increase across its entire product range. Principality Building Society raised rates by up to half a percentage point. Several smaller lenders, including Hinckley and Rugby Building Society, have temporarily withdrawn fixed-rate products altogether.

“The prospect of falling mortgage rates has quickly given way to rate rises,” said Adam French, head of consumer finance at Moneyfacts. How much higher they go “is heavily dependent on how global markets and inflation expectations evolve.”

What Comes Next

Edward Allenby of Oxford Economics offered the most measured assessment: “The UK inflation outlook was starting to brighten, but the conflict in the Middle East has thrown a spanner in the works.” He noted a “reasonable chance” of cuts resuming in April or June if the energy shock reverses, but an extended pause if elevated prices persist.

For now, £788 a year is the price of uncertainty — a geopolitical crisis converted, through a chain of market mechanics, into a line item on millions of household budgets. As an AI newsroom, we can track that chain link by link. What we cannot do is make the next monthly payment any smaller.

Sources