Mortgage Rates Rise as Hundreds of Cheapest Deals Vanish in a Month

Fighting in the Middle East reached inside the homes of British borrowers with unusual speed. Since the conflict involving Iran began on February 28, 2026, banks and building societies withdrew more than 1,500 residential mortgage products from the UK market, according to Moneyfacts data. The average two-year fixed rate surged by more than 100 basis points to 5.84%, while five-year fixed deals climbed 79 basis points to 5.75%, the sharpest repricing since the autumn 2022 mini-budget. A brief window of relief, the sub-4% mortgages that had returned to UK shelves for the first time in years, essentially ceased to exist.

The mechanism running from the Strait of Hormuz to a household's monthly payment is direct and well-worn. Iran's disruption of oil shipments pushed Brent crude above $110 a barrel, reigniting inflation fears across global bond markets. Two-year gilt yields rose more than 40 basis points in a single week. Because lenders price fixed-rate mortgages against swap rates, which closely track gilts, they had little choice but to reprice. In one 48-hour stretch alone, nearly 500 residential products were withdrawn. Every major high-street bank, including Barclays, HSBC, Lloyds, NatWest, and Santander, raised rates since the start of March, in some cases more than once.

Adam French, head of consumer finance at Moneyfacts, described the conditions as "some of the most turbulent in the UK mortgage market since the aftermath of the September 2022 mini-budget," adding that lenders were "reacting to rapidly rising swap rates." By late March, a striking anomaly appeared: the average two-year fixed rate climbed above the average five-year fixed rate, an inversion that almost never occurs. Rachel Springall, finance expert at Moneyfactscompare.co.uk, explained that "the unrest in the Middle East is causing concerns over the path of interest rate setting, with inflation expected to spike in the months ahead."

The scale of the pullback does not match 2022. After Liz Truss's mini-budget, 935 mortgage deals vanished from the UK market in a single day. Nicholas Mendes, mortgage technical manager at John Charcol, noted that while "the pattern of rapid withdrawals and repricing feels familiar," the cause this time is fundamentally different: "In 2022, the shock was driven by domestic fiscal credibility. This time, the pressure is coming from a sharp shift in rate expectations, higher swap pricing, and concern that policy may need to stay tighter for longer." The Bank of England, which held its base rate at 3.75% in a 5-4 vote and revised its inflation forecast upward to roughly 3% for the second quarter of 2026, now appears unlikely to deliver the cuts markets had expected at the start of the year.

The same geopolitical pressure is reshaping the US market. The 30-year fixed mortgage rate climbed to 6.46%, its highest level since early September, as the 10-year Treasury yield touched 4.44%, the benchmark from which American lenders price most home loans. On a $450,000 home with 20% down, a buyer who locked in a rate in February now pays roughly $1,346 less per year than one securing the same loan this week, a gap worth $40,000 over the life of the loan. Mortgage application data from the Mortgage Bankers Association showed purchase applications fell 3% in a week while refinance applications dropped 17%, concrete evidence that the rate moves are suppressing activity during what should be the peak spring buying season.

For buyers and homeowners weighing their next move, the UK experience offers a clear signal: when oil shocks merge with inflation revisions, lender spreads widen fast and the cheapest products go first. The variables to watch are the 10-year Treasury yield, crude oil prices, and the gap between what swap markets expect of central banks and what those banks actually deliver.