UK 30‑year borrowing costs rise to 6 % amid global bond sell‑off

UK borrowing costs climb to 6% amid global bond sell‑off

London, 1 October 2026 – The Bank of England’s 30‑year government bond yield rose to 6.01 %, the steepest level recorded since 1998, according to the latest data from the Bank of England’s market‑watching system.

Across the Atlantic, the United States has seen its 10‑year Treasury yield climb to 4.52 %, the highest level since early 2002, as investors trim holdings of long‑dated debt in a wave that has also widened the spread between French and German bonds to 127.51 basis points – the widest gap since 2012.

Borrowers will feel the pinch as mortgage rates climb, while businesses face higher borrowing costs.

The surge in yields follows a sharp sell‑off in government bonds that has been driven by worries over rising inflation and widening fiscal deficits in the eurozone, coupled with a cautious stance from central banks worldwide. The Bank of England has signalled that it will keep monetary policy tight until inflation falls below its 2 % target.

Higher yields translate directly into higher mortgage rates for consumers, with the average 30‑year fixed‑rate mortgage now hovering around 5.9 %. The housing market, already dampened by the pandemic, is expected to cool further as affordability erodes.

Businesses, particularly those that rely on long‑term financing, are likely to face steeper borrowing costs. The cost of issuing new bonds has increased by several hundred basis points, squeezing corporate profit margins and potentially curbing investment in expansion and innovation.

In response, the UK Treasury has reiterated its commitment to maintaining a stable macro‑environment, noting that the current spike is part of a broader global trend. “We are closely monitoring the developments and remain prepared to take appropriate measures should the situation deteriorate further,” a Treasury spokesperson said.

The rise in UK yields is also a warning sign for the broader financial system. Higher borrowing costs can dampen consumer spending, reduce business investment, and place additional strain on banks’ balance sheets as they adjust to a more expensive funding environment.

Analysts point to a tightening of global liquidity as a key factor, with investors seeking safer assets amid geopolitical uncertainties. The widening French‑German spread reflects heightened risk perceptions about the eurozone’s fiscal health, further feeding into the broader sell‑off.

Looking ahead, market participants will watch closely how the Bank of England balances its inflation‑fighting mandate against the need to support growth. If yields continue to climb, a shift in policy stance could become inevitable, potentially altering the trajectory of the UK economy in the coming months.

The next Bank of England policy review, scheduled for early November, will be a crucial barometer for the direction of interest rates and borrowing costs. Investors and consumers alike will be keeping a close eye on the outcomes.