Why are UK borrowing costs rising and what does it mean for me?

The UK government's borrowing costs are on the rise, with yields on 10-year and 30-year bonds reaching their highest levels since 1998. This increase is due to concerns about inflation among global investors. Governments borrow money by selling bonds to investors, who receive regular interest payments in return for lending the money.

UK government bonds, called gilts, are considered relatively safe investments with little risk of repayment. However, the rising yields mean it costs the government more to borrow money over the long term.

This situation poses challenges for the new UK Prime Minister Andy Burnham and Chancellor John Healey as they prepare for the upcoming budget on October 28th. The government's fiscal rules limit its ability to spend more money to cover higher borrowing costs, which could lead to less support for households facing the cost of living crisis or higher taxes to pay for any assistance.

Higher gilt yields could also impact the mortgage market, potentially leading to increased rates for new fixed deals. However, this is different from the rapid rise in mortgage rates following Liz Truss's mini-budget in September 2022. Analysts expect any increase in mortgage rates to be more gradual and give lenders time to adjust their funding costs.

The rising yields are not limited to the UK, as similar trends have been observed in the US, Japan, and Europe. This global concern stems from worries about high oil prices and persistent inflation, which can erode the purchasing power of fixed payments. Investors are demanding higher yields to compensate for these risks, leading to a sell-off of bonds. Additionally, there is growing demand for loans from big tech companies investing in AI, further driving up competition and interest rates.