UK government faces rising borrowing costs as 10-year gilt yields hit highest level since 2008

The UK government is now paying more than 5.2% to borrow money for a decade. That’s the highest yield on 10-year gilts since the financial crisis in 2008, and it’s putting enormous pressure on a new administration that hasn’t even delivered its first Budget yet. On September 1, the benchmark 10-year gilt yield climbed to 5.21%, while 30-year yields hit approximately 5.89%, a level not seen since 1998. How did we get here The spike didn’t come out of nowhere. UK yields have been on a steady climb throughout 2026, rising from lows near 4.23% earlier in the year to peaks above 5.20% back in May. The trajectory briefly softened before resuming its upward march into September. Several forces are pushing yields higher simultaneously. Rising oil prices, persistent inflation concerns amplified by tensions in the Middle East, and a broader global bond sell-off have all contributed. Year-to-date, British gilt yields have risen more sharply than equivalent benchmarks in the US or Germany, suggesting that domestic factors are doing heavy lifting here. Those domestic factors include a political transition, growing fiscal strains, and borrowing data from February and May that came in above forec...