Bank of England raises benchmark rate to 4% after Iran conflict

The Bank of England raised its main interest rate to 4% on Thursday, ending a multi-year period of easing. The Monetary Policy Committee voted to increase the benchmark by 0.25 percentage points. This is the first rate hike in the United Kingdom since August 2023. The decision responds directly to inflationary pressures stemming from the ongoing war with Iran.

Consumer price inflation in the U.K. reached 3.5% in September. That figure represents an 11-month high and sits well above the central bank's 2% target. Prior to this month's decision, the policy rate stood at 3.75%. The bank had previously moved rates down from a 15-year peak of 5.25% before the geopolitical situation shifted.

Energy costs drive the current inflation spike. The conflict with Iran has created bottlenecks in the Strait of Hormuz, a key route for global energy transport. These disruptions have reduced oil and gas supplies, pushing prices higher across the economy. The Monetary Policy Committee determined that immediate action was necessary to stabilize prices.

Ellie Henderson, an economist at Investec, said the committee's patience with rising inflation had worn thin. She warned that if energy prices stay elevated, a temporary price shock could become permanent. This view aligns with the consensus that proactive measures are needed to prevent entrenched inflation.

The bank released quarterly economic projections alongside the rate decision. These forecasts carry more uncertainty than usual due to the volatile nature of the geopolitical situation. The economic outlook now depends heavily on developments in the Iran war and the impact on global energy markets. Higher rates aim to cool the economy by making borrowing more expensive, which reduces spending.

A recent sharp fall in energy prices offers a variable for future calculations. Oil and gas prices dropped following heavy losses by the Republican Party in the U.S. midterm elections. If this decline continues, the upcoming peak in inflation may be lower than expected. Such a development could temper expectations for further rate hikes.

Other major central banks have also raised rates in response to the Iran war. The U.S. Federal Reserve and the European Central Bank recently increased their own key rates. Forecasts for these institutions depend largely on energy prices. The U.K.'s policy shift follows a period where rates had been trending down since the U.S. and Israel attacked Iran on February 28. The conflict disrupted the previous easing cycle and forced a rapid reassessment of economic risks.