Iran war threatens Healey's Budget plans, think tank warns

The conflict involving Iran has pushed energy prices higher worldwide, alongside the effects of Russia’s invasion of Ukraine. That pressure raises prices for households and businesses. It also makes the government’s existing spending plans less valuable in real terms. This matters because Healey is preparing his first Budget while trying to reassure financial markets.

For example, the IFS estimates that maintaining departments’ budgets against higher inflation could require an extra £25bn in 2029-30. Higher inflation can increase tax revenues, but it also means the same cash allocation buys fewer services, staff hours, or supplies. At the same time, turbulence in bond markets could add about £10bn to borrowing costs that year.

Healey could respond with spending cuts, tax increases, or a combination. He might postpone detailed spending decisions until a later statement or spending review. But the IFS warns that announcing future cuts he does not intend to deliver would damage the Budget’s credibility. Forecasts remain especially uncertain.

Inflation means prices are rising, so money’s purchasing power is falling. A government department with a fixed cash budget may still receive the same number of pounds, but those pounds will buy fewer goods and services. This matters because public plans are usually set in cash terms, while wages, energy, supplies, and other costs can increase.

Suppose a department receives £100m and prices rise substantially. It cannot maintain exactly the same activity if its staff, equipment, and contracts become more expensive. The article says higher inflation could push the government to find an extra £25bn in 2029-30 to maintain departments’ budgets. Inflation may also raise tax revenues, but that does not automatically protect public services.

The inherited spending plans could leave some departments’ budgets failing to keep pace with inflation in a few years. Healey could address that through more funding, tax rises, cuts elsewhere, or later decisions. The IFS says ignoring the gap could undermine the credibility of government plans.

By 2029-30, higher inflation and borrowing costs could put tens of billions of pounds of extra pressure on the government. The IFS and other analysts expect recent bond-market turbulence and higher inflation to add around £10bn to borrowing costs. Separately, the IFS estimates that preserving departments’ spending power against inflation may require another £25bn.

These figures describe different mechanisms. Higher borrowing costs increase the amount needed to service government debt. Higher inflation raises the cost of maintaining public services because departments’ cash budgets buy less. If the two estimates are viewed together, they represent about £35bn of pressure, although the article presents them separately and warns that forecasts are exceptionally uncertain.

The £25bn estimate comes before considering the government’s ambition to raise defence spending. Healey may delay spending decisions until a future statement or spending review. The government is still expected to meet its fiscal rules, but the IFS forecasts a smaller buffer, or headroom, of around £20bn.

Wars can disrupt energy markets and push energy prices higher around the world. Energy is a direct household cost, but it also affects businesses that transport goods, heat buildings, or produce products. When those costs rise, companies may pass them on through higher prices. This is why a conflict far from Britain can affect prices at home.

The article says the Iran conflict and Russia’s invasion of Ukraine have helped drive energy prices higher. Those increases have reached customers through more expensive goods on shelves and higher prices at the pumps. Petrol becomes costlier when fuel prices rise. Businesses also face higher operating costs, which can feed into the prices of many products and services.

The article also links the wars to higher UK government debt-interest payments and notes that mortgages have become more expensive. It does not explain the precise mortgage-rate mechanism. Overall, these pressures reduce households’ breathing space and make the Budget harder to plan, especially when inflation and bond-market conditions remain volatile.

The government’s fiscal rules are two stated commitments. By the financial year 2029-30, it will borrow only for investment projects. It will also reduce debt as a percentage of GDP. These rules are intended to constrain borrowing and show that public finances are being managed over time.

“Headroom” is the estimated gap between the government’s plans and the point at which the rules would be broken. The IFS expects the rules to be met with around £20bn of headroom. For comparison, the OBR’s Spring Statement forecast gave a £24bn buffer. A smaller cushion means less room for unexpected costs, weaker growth, higher interest rates, or inflation.

The IFS still expects the rules to be met, partly because inflation can push tax revenues higher. But its forecasts are exceptionally uncertain, and the OBR could reach a different result. A thin buffer makes future policy choices more difficult and increases pressure to keep spending and tax plans credible.

When inflation makes existing spending plans inadequate, the chancellor must decide how to close the gap. The main choices identified in the article are spending cuts, tax rises, or a mixture. Each option can help the overall numbers, but each also changes what households, departments, or public services receive.

The IFS estimates that maintaining departments’ budgets against higher inflation may require an extra £25bn in 2029-30. The government could raise that money through taxes, reduce other spending, or provide less funding to departments. It could also leave the detailed spending totals for next year’s Spring Statement or a Spending Review, hoping the economic outlook improves.

Delay carries a credibility risk. The IFS says inherited plans may leave some departments unable to keep pace with inflation in a few years. It warns that pencilling in cuts Healey has no intention of delivering would make the Budget “a work of fiction.” His choices must therefore balance fiscal discipline with realistic public-service funding.

These parts of the public finances move together, but not in one simple direction. Inflation can push tax revenues higher because the tax system receives more money as prices and incomes rise. However, it also makes public services more expensive. Fixed departmental cash budgets therefore lose real value, creating pressure for extra funding.

Bond-market interest rates matter because the government borrows through financial markets. The article says recent bond-market turbulence and higher inflation could add around £10bn to borrowing costs in 2029-30. Those higher debt-interest payments leave less money for services or require more borrowing. The wars have contributed to this pressure through higher energy prices and inflation.

The government’s debt position is judged partly through its fiscal rules: borrowing only for investment and reducing debt as a share of GDP by 2029-30. Inflation may help those rules by lifting tax revenues and nominal GDP, but higher interest costs and spending needs reduce the safety margin. The IFS expects headroom of around £20bn.