Long-term borrowing costs in the UK have reached levels not seen since the late 1990s. Lenders are raising the rates on fixed-rate deals, and the Chancellor has less time before the October 28 Budget.
Why are mortgage rates going up again in the UK in October 2026?
Costs are going up much faster for British homes who are leaving fixed-rate deals this fall than many people thought they would just a few months ago. The reason is the gilt market, where the government borrows money and prices have risen to their highest levels in more than 20 years. LSEG data shows that on October 1, the 30-year gilt yield quickly hit 6.029%, which was the highest level since early 1998. At the same time, the benchmark 10-year yield rose to about 5.5%, which was the highest level since July 2007.
Mortgage rates are not just based on the Bank of England base rate. Fixed-rate loans are priced by banks based on swap rates, which change a lot with the yields on two-year and five-year gilts. When it comes to fixed rates, most British borrowers choose two-year and five-year bonds. Right now, five-year gilt yields are at their highest level since 2008.
On the high street, you can already see the result. Pound Sterling Live says that HSBC, Halifax, and BM Mortgages have all raised the prices of some of their residential and buy-to-let ranges this week. This is because lenders are passing on higher wholesale funding costs to customers.
How much more do borrowers have to pay?
Two-year fixed mortgage rates are about 95 basis points higher now than they were before the energy conflict in the Middle East. This was said by the Bank of England. A rise of almost one percentage point can add a lot to the monthly payments of a typical repayment mortgage. This is especially true for first-time buyers in the South East who have big loans compared to their income.
Rates are also going up because of uncertainty. As a safety measure, lenders often add an extra margin when they don’t know what their own funding costs will be in a week. Brokers have been telling borrowers whose deals are coming to an end in the next six months to get an offer early because many lenders let customers switch to a cheaper product before the deal ends if rates drop later.
Why Are Gilt Items Going Down in Price?
Many forces are at work at the same time. The first one is power. Because of problems in the Strait of Hormuz for months, oil prices have been high. As a result, inflation risk has gone up sharply, and markets expect central banks to keep policy tight. Kathleen Brooks, research head at XTB, said that sovereign yields, especially those on US Treasuries and gilts, have been going up and down with the price of oil.
The second one is money policy. The Monetary Policy Committee of the Bank of England recently decided to keep Bank Rate at 3.75%. They did say that inflation could peak at around 4%, which has made investors wary of taking rates down even more.
The third is quantity and the state of the economy. For 2026–27, the Debt Management Office is responsible for financing a net amount of £257.1 billion, which is mostly paid for by selling gilts. They are being asked to take on a lot of debt at the same time that they are doubting the direction of the government’s funds.
The fourth one is worldwide. Recently, yields on 10-year US Treasury notes hit their highest level since 2007. This is part of a larger sell-off in long-term government bonds that has spread across developed markets. But the UK has been hit the hardest. Throughout 2026, gilt yields rose more strongly than those in the US or Germany.
Why is the budget on October 28 so important?
The market is having one of the worst times in a generation while Chancellor John Healey is putting together the Budget. Every basis point that gilt yields go up, the government has to pay more to service its debt, which makes it harder to cut taxes or keep its spending promises. According to earlier research, the government could have to pay an extra £6 billion a year in debt interest by 2029–30 if yields stayed high.
Goldman Sachs has raised its prediction for the 10-year bond yield to 5% by the end of 2026 from 4.4%. They see the Budget as the next big test. Its experts said that relying on a big rise in gilt issuance in 2027 would probably make the gilt risk premium go up even more. To put it simply, the markets want proof that debt will be lowered, and if the Budget doesn’t deliver that, it could make mortgage rates go up even more.
Could this be a repeat of the mini-budget crisis in 2022?
It’s impossible not to make comparisons with September 2022, but the facts are different. The event in 2022 began with a single unfunded budget statement and got worse when pension funds used liability-driven investment strategies to force people to sell their investments. Right now, things are moving more slowly. This is because of a global reset in the prices of government debt, the risk of energy-driven inflation, and a lot of new debt being issued in many countries.
Viewpoint is also important. A 30-year yield of 6% is high for the time after the financial crisis, but it’s not the highest ever. In September 1981, UK long-term yields were around 16%. Things have changed because people, companies, and the government have been getting used to very low interest rates on loans for more than ten years. This makes the adjustment painful even at rates that were once thought to be normal.
What do borrowers need to do now?
For homeowners whose fixed deals are coming to an end in the next six months, brokers say they should look into their options now instead of waiting for the Budget. Getting an offer on a mortgage now sets a price cap, and if prices go down before the new deal starts, borrowers can often switch to a better product.
If your rate is tracker or variable, your payments will be based on Bank Rate instead of swap rates, so the math is different for you. Their risk depends on whether the Bank of England tightens policy again. If they do, it will depend on how energy prices and inflation change over the winter.
There is more good news for savers. When gilt yields go up, rates on fixed-term savings products tend to go up too. When long-term yields go up, pension rates for retirees also tend to go up.
Takeaway for Investors
The most important price in the UK economy is now the bond market. It now determines how much mortgages cost, how much money the government has to spend, and how much stocks that are sensitive to interest rates, like homebuilders and real estate investment trusts, are worth. There will likely be a lot of volatility in gilts and, by extension, mortgage rates until we have more information about the Middle East’s energy supply, UK inflation, and the fiscal plans in the October 28th Budget.
Questions People Ask Often
What is the current yield on a 30-year gilt?
The 30-year gilt yield quickly hit 6.029% on October 1, 2026, which was the highest level since early 1998. It has stayed close to that level ever since.
What’s the deal with gilt yields and mortgage rates?
Fixed-rate mortgages are priced based on swap rates, which are very close to the yields on two-year and five-year gilts. The cost of funding fixed-rate loans goes up when those yields go up, so lenders change the prices of their products.
When does the UK Budget come out?
The Budget will be given by Chancellor John Healey on October 28, 2026. The markets will pay close attention to new predictions for borrowing money and any changes to plans to issue gilts.
