UK Government Borrowing Rises to £18.3 Billion in August, Exceeding Forecasts

The UK government borrowed £18.3 billion in August, exceeding both the previous year’s figure and official forecasts, driven by rising inflation and debt interest payments. The figure represents a nearly 20% increase from the £15.6 billion borrowed in August 2023, and is £3.5 billion above the Office for Budget Responsibility’s (OBR) August forecast, bringing the total overspend for the financial year to £8.1 billion. Higher inflation, impacting public sector pay, benefits, and pensions, alongside exceptionally high debt interest costs, reaching £8.8 billion for August, a record since 1997, are key factors contributing to the increased borrowing.

The Institute for Fiscal Studies (IFS) warned that spending on debt interest is now a “worryingly large share” of overall government spending. Capital Economics deputy chief UK economist Ruth Gregory stated the figures present a “dismal picture” ahead of the autumn Budget on October 28th, potentially forcing Prime Minister Andy Burnham to scale back policy ambitions or raise taxes. The City had forecast borrowing of £15.6 billion for August. While tax receipts were £200 million higher than the OBR’s forecast, central government expenditure overshot the forecast by a larger margin.

Chief Secretary to the Treasury Emma Reynolds emphasized the importance of “fiscal discipline” and highlighted the UK’s “huge potential” for economic growth, stating that the government remains committed to its fiscal rules “with a buffer against uncertainty.” However, economists warn that a weakening economy suggests continued borrowing above expectations is likely.

Where they differ

• The Guardian emphasized the borrowing figure was £2.9 billion more than in August 2025, while the BBC focused on the nearly 20% increase year-on-year.
• The Guardian quoted emeritus professor Joe Nellis framing the situation as a “fiscal straightjacket,” a perspective not present in the BBC report.
• The BBC included a quote from Nick Ridpath of the IFS, highlighting the impact of higher borrowing costs and inflation, while the Guardian did not.

What is not yet known

• The specific details of Prime Minister Burnham’s policy ambitions and how they might be affected remain unclear.
• The extent to which the recent bond market turmoil will constrain the Chancellor’s options is not fully defined.

Background

• The US Federal Reserve raised interest rates in both September 2026 and earlier in September 2026, citing persistent inflation as a key driver [Fact Refinery, 2026-09-20; 2026-09-17].
• Treasury Secretary Scott Bessent’s bond strategy has recently drawn criticism from his former mentor, Stanley Druckenmiller, who advocates for deficit reduction instead of yield suppression [Fact Refinery, 2026-08-25].
• Since 1997, debt interest costs have not reached the level reported in August of the current year [background knowledge].

Our reading

Our reading is that the UK government’s increased borrowing in August, exceeding both last year’s figures and forecasts, signals a tightening fiscal situation. The combination of rising inflation impacting public spending and record-high debt interest payments appears to be creating significant budgetary pressure. While the government expresses confidence in its fiscal rules, the warnings from economists and the acknowledgement of economic weakness suggest further overspending is likely.

What to watch

• The UK Autumn Budget on October 28th, to see if Prime Minister Burnham scales back policy ambitions or proposes tax increases [article text].
• The next release of UK government borrowing figures, to determine if the trend of exceeding forecasts continues [article text].
• Developments in the bond market, to assess whether recent turmoil will further constrain the Chancellor’s options [article text].

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