UK inflation rose to 3.3% in March 2026up from 3.0% in Februaryaccording to the Office for National Statistics. That’s the title. The hard part is what sits next to it: weak growth, high business costs and a Bank of England that can’t deal with external energy shocks as neatly as it can deal with demand-led inflation. In its March minutes, the Monetary Policy Committee said that the conflict in the Middle East had pushed up the prices of energy and other goods, that CPI inflation would be higher in the near term as a result, and that it also assessed weak activity that might follow from higher energy costs. The latest IMF forecast pegs UK growth 0.8% in 2026. This is why this print is important. Britain is not facing a clean inflation problem. It experiences high values and weak momentum at the same time.
The closest driver was gasoline. The ONS said motor fuel was a major contributor to the annual rate increase. CPI increased 0.7% in March, compared to 0.3% last year, while transport inflation rose to 4.7% from 2.4% in February. Petrol prices rose by 8.6 pence a liter between February and March, while diesel rose by 8.8 pence, putting both at their highest level since August 2024. Those figures explain why the huge number moved. They don’t explain themselves, why economic growth is now more important than just inflation. (ons.gov.uk)
The big issue is how far the shock travels throughout the economy. The shock has come from the conflicts in the Middle East, and the problem for firms is not only that energy prices have risen, but that no one can say with great confidence how long the conflict will last or that oil will finally be resolved when the military and naval dangers are over. The Bank has said that the dispute goes into fuel costs and business expenses. That pressure doesn’t stop at the tap. It is involved in logistics, logistics, import and distribution. Prolonged power shocks can also cause some supply problems. Reuters reported in March that the UK had to move to reopen its domestic CO2 industry because rising fuel prices driven by the Iran conflict, as well as European production disruptions, put Britain’s CO2 supply at risk. CO2 is important in food and beverage production and is widely used in beverage carbonation and food freezing, cooling and packaging. Packaging and cooling things because it helps to preserve the products and extend the shelf life. If CO2 supply tightens and costs rise as well, some food and consumer product prices may come under further pressure. At that time, firms must decide whether to accept the increase, cut back elsewhere, or transfer. When labor is already expensive due to the NICs of top employers, there is little room for absorption. The data for March do not indicate that the broad cycle of inflation in the second round continues, but it does indicate the shock of external forces in the economy where the control of domestic costs was difficult to maintain. (bankofengland.co.uk, Reuters.com)
That domestic situation requires more scrutiny than is often found in same-day inflation coverage. From 6 April 2025, the employer’s rate for Secondary Class 1 NICs has increased from 13.8% to 15%, and the secondary threshold has been cut from £9,100 to £5,000 per annum. The Government has increased the maximum Employment Allowance from £5,000 to £10,500 and removed the old £100,000 eligibility limit, reducing the effect on many small employers. Nevertheless, the broad direction is clear. The tax system has made paying high prices for much of the business community at the same time as growth has weakened and energy costs have become more difficult. That is not a growth-promoting mix. (gov.uk)
The OBR’s own language makes the point hard to miss. In its Economic and Fiscal Outlook for March 2026, it said weekly wage growth was expected to slow in part because of “the gradual rise in last year’s increase in employer National Insurance contributions,” and that real wage growth had slowed from 2.5% in 2024 to less than 1% in late 2025 because of the NIC damage. It covers salaries, rates and hiring conditions. If the goal is strong growth, taxing labor heavily has always been a risky choice. It looks even more dangerous when an external power shock comes over you. (image.uk)
This is where the issue of growth becomes more important than the issue of inflation itself. Normal inflation in a strong economy leaves the central bank with a relatively simple script: demand is strong, prices are hot and policy needs to remain tight. That is not the current situation. The Bank kept the Bank Rate at 3.75% in March and made it clear that monetary policy cannot directly affect global energy prices. What it can do is depend on the risk that higher fuel and utility costs start to feed into a broader decline in domestic inflation. But raising prices more has been an energy shock from foreign countries and weak growth in the past more than its costs. It risks depressing domestic demand further without doing much to reverse the original source of price increases.
For businesses, this leaves a practical problem. Fuel and energy costs rise first. Taxes paid are already higher than before April 2025. Consumer demand is not strong enough to ensure easy pass-through of costs. The IMF’s 0.8% growth forecast is not a call for recession, but it is weak enough to make pricing decisions difficult and hiring decisions more cautious. Firms with strong pricing power may dominate. Firms with tight margins, heavy exposure to logistics or labor-intensive costs will feel the squeeze more quickly. That is why March’s inflation print should be read as a margin story as well as a big story. (imf.org)
There is also the issue of policy trust behind the scenes. The government can’t talk about growth while taking tax from rent as if it is not biased. They are not like that. Employer NICs focus on employment, hours, pay and willingness to increase. The continued freeze on personal tax caps adds another drag on household purchasing power even if it’s not a business tax in the narrow sense. It is set alongside weak growth and energy shocks, leaving the economy less resilient than it should be. Regulatory reform may help margins, but the future promise of lower friction is not the same as reducing current cost pressures on payrolls and operating budgets. (
A very useful way to read the inflation number for March, it’s not just that gasoline pushed the CPI to 3.3%. The deeper problem is that Britain entered this shock with a weak growth profile and a domestic policy mix that had made life difficult for employers. An external shock would always hurt. It hurts more when the tax system already increases labor costs and when demand is too soft to make the price pass without pain. That is the combination of businesses, investors and policy makers that should be focused on now.
The next important thing is whether this remains a low intensity or spreads continuously. Before the latest shock, the Bank’s February Monetary Policy Report said CPI was expected to return to around the 2% target from April and remain close to that level over the forecast period. After the conflict in the Middle East and the increase in energy prices, the March minutes said that the recovery will be delayed, and the CPI is now expected to be between 3% and 3.5% in the next few quarters and possibly 3.5% in Q3. If the energy markets stabilize and the ongoing effects remain moderate, March may look like a rough start rather than the start of a very broad price cycle. But even a ceasefire would not ensure a quick return to pre-conflict spending levels, especially if disruptions to supply, shipping and industrial inputs take time to subside. In any case, the position of the Bank itself is now much less structured than it was a few weeks ago: the expectation of causing inflation to go back to the target has been pushed, while the new promise is that the policy will do what is necessary to bring inflation back to 2% in the medium term. That is a much more difficult area for Banks, markets and firms than the headline number alone suggests.
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