30-Year Gilt Yield Hits 5.82%: UK Borrowing Costs Soar to Highest Since 1998, Intensifying Budget Pressure

The yield on 30-year UK government bonds surged to 5.82%, the highest issuance rate in nearly 30 years, while the 10-year yield at 5.2% is the highest among G7 nations. The UK's annual debt interest bill has reached £110 billion, making it the "second-largest government department." Despite market pressure, the issuance still attracted over £85 billion in orders—amid high yields, some are suffering while others see opportunity.

The UK's long-term borrowing costs have climbed to their highest level in nearly three decades, as a global bond sell-off transmits pressure directly to the country's public finances.

On Tuesday, the UK Debt Management Office (DMO) completed a £40 billion 30-year gilt issuance at a yield of 5.82%, the highest issuance rate since the DMO was established in 1998. This figure not only marks a 30-year high for long-term borrowing costs but also imposes greater constraints on the upcoming budget.

Fund manager Gordon Shannon said the rise in UK gilt yields is directly linked to global market trends, but "the sharp jump in domestic borrowing costs will undoubtedly squeeze the government's policy space in next month's budget."

Meanwhile, the UK 10-year gilt yield has risen to 5.2%, the highest among the Group of Seven (G7) nations. In a speech on Monday, UK Chancellor Rachel Reeves acknowledged that the UK's annual debt interest payments have reached £110 billion, exceeding all major government spending areas except healthcare, and pledged to be "honest" about the need to control spending in the budget.

Issuance Well Received, High Yields Attract Investors

Despite the turbulent market environment, the gilt issuance still attracted strong investor demand. According to early information sent to investors, total orders for the syndicated deal exceeded £85 billion, with the subscription multiple far exceeding the issuance size.

Stephen Jones, Chief Investment Officer at Aegon Asset Management, said: "For some it's pain, for others it's opportunity. Investors believe the yields currently offered by UK gilts are attractive enough to warrant adding exposure."

DMO Chief Executive Jessica Pulay also stated that the transaction was completed smoothly in a volatile market environment, "further demonstrating the continued strength and depth of the UK gilt market, as well as the strong support from market participants for the financing programme."

The DMO plans to issue a total of £250 billion in gilts this year to support the government's spending plans.

Global Bond Sell-off Adds Fuel

The surge in UK borrowing costs is not an isolated event but a microcosm of sustained pressure on global bond markets.

The core driver of this global bond sell-off is the sharp rise in energy prices following the outbreak of the Middle East conflict—Brent crude oil prices have approached $100 per barrel again, significantly cooling market expectations for major central bank rate cuts and having a sustained impact on global economic growth and inflation prospects.

Long-term rates in other major European economies also hit new highs on Tuesday: France's 30-year government bond yield rose to 5.02%, the highest since September 2008; Germany's 30-year yield rose to 3.86%, the highest since 2011.

For the UK, market pricing shows traders expect the Bank of England (BoE) to cut rates by at least another 25 basis points this year. The cut is not expected to be delivered at this month's meeting, but investors widely expect the BoE to slow the pace of its gilt sales (quantitative tightening), as the operation has put additional upward pressure on long-term yields.

Debt Interest Pressure Forces Fiscal Consolidation

High borrowing costs are pushing UK public finances into a more severe situation. The UK's annual £110 billion debt interest bill has become the "second-largest department" in the government budget—Chancellor Rachel Reeves used this analogy in her Monday speech, pointing out that if debt interest were treated as a government department, its size would be second only to the Department of Health and Social Care, exceeding the combined total of the Ministry of Defence, Home Office, and Ministry of Justice.

Since the COVID-19 pandemic, UK long-term yields have undergone a sustained upward trend, further accelerated by the energy price shock triggered by the Middle East conflict and market concerns over excess global debt supply. The pricing of this 30-year gilt at 5.82% officially "locks in" this 30-year high into the coupon cost of newly issued bonds, meaning the fiscal burden will be heavier for decades to come.

Against this backdrop, the upcoming budget is expected to face more limited room for policy manoeuvre, leaving the government with a tougher trade-off between spending expansion and fiscal consolidation.