UK long-term borrowing costs highest since 1998 ahead of October Budget

UK long-term borrowing costs highest since 1998 ahead of October Budget

Long-term borrowing costs for the UK government have reached their highest level in 28 years, escalating pressure on Prime Minister Andy Burnham just weeks before his inaugural Budget. The yield on a 30-year gilt, which represents government debt, climbed to 5.89%—a peak not seen since 1998. Globally, borrowing expenses for governments have also surged this morning, with market interest rates hitting new multi-decade highs.

This upward shift in borrowing costs is driven by several concerns: inflation linked to the ongoing conflict in Iran, competition for long-term borrowing from large technology companies, and worries about the levels of public debt. These factors collectively complicate the upcoming Budget process for Burnham and Chancellor John Healey. Burnham, speaking to MPs for the first time as prime minister, emphasized that his government’s foundation in addressing the cost-of-living crisis will be “fiscal responsibility.” He acknowledged that both the economy and cost of living remain “the biggest issues facing the country.”

Rising borrowing costs will limit how much the government can spend within the self-imposed fiscal rules designed to keep borrowing in check, thus restricting Healey’s ability to introduce measures aimed at easing pressures on consumers. Despite fiscal constraints, Burnham promised “more substantial change” to tackle living costs, admitting, “Britain is not where any of us would wish it to be.” The yield on the 10-year gilt also surged, reaching levels last seen during the 2008 global financial crisis, indicating a significant escalation in government borrowing expenses. It’s important to note that gilt yields rise as bond prices fall, a dynamic reflecting investor sentiment and risk.

This trend is not isolated to the UK; borrowing rates in the US, Japan, and Europe have also reached comparable heights recently. Chancellor Healey remains committed to fiscal rules set by his predecessor Rachel Reeves, which are intended to provide clarity to markets about the government’s borrowing trajectory. However, with rising forecasted spending on interest payments, the government may need to tighten spending elsewhere or increase taxes to comply with these rules. Recent interest rate increases could potentially erode up to half of the previously forecast fiscal flexibility. Additionally, higher government borrowing costs tend to raise borrowing expenses for businesses and households, posing further risks to economic growth. The challenge of balancing spending and taxation is already complicated by growing demands on defense and cost-of-living supports, and these latest developments intensify that difficulty.

The rise in interest rates follows hints from the US about potential central bank rate hikes, alongside pressures in Japan to consider similar moves. While the UK financial markets were closed for a bank holiday, global reactions reflected heightened uncertainty. Meanwhile, Chancellor Healey, attending a meeting of finance ministers and central bankers in the USA, highlighted the UK’s economic performance, stating the country had the fastest growth among G7 nations in 2026 so far, with improvements in productivity and the sharpest reduction in borrowing among major economies.

Opposition figures, such as Conservative leader Kemi Badenoch, criticized Burnham’s approach. Speaking in the House of Commons, she said, “His diagnosis is completely wrong,” and argued that the prime minister’s belief that “if Government spends more money, we will all get richer” is flawed, asserting, “That is not how this works.” From a market perspective, JP Morgan’s chief European strategist Karen Ward explained that governments globally are seeking to expand spending by borrowing more but face competition from major tech firms investing in the AI revolution, which drives up borrowing costs. She advised Burnham and Healey to clearly outline how they would fund new expenditures on defense and the cost of living, as well as how government debt would be managed.

Kathleen Brooks, research director at investment firm XTB, described the situation as “red lights flashing,” noting increased volatility in recent months. With government debt and tax revenues at historic levels, she remarked that these are particularly challenging times for the new government and chancellor. As bond yields rise, the cost of servicing debt also increases, putting additional strain on public finances

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