High oil prices lift household costs across transport, heating and mortgages

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High oil prices lift household costs

Highlights

Brent crude rising above $100 a barrel and global diesel prices reaching record highs have sharply increased transport and heating costs for households worldwide.
Rising energy prices pushed UK inflation to its highest level since October 2025, forced the Reserve Bank of Australia to lift its cash rate to a 15-year high, and raised U.S. 30-year mortgage rates from 6.1% to 7.5%.
Winter heating bills are forecast to jump 47% in New York state and 10% in the UK, while global food inflation is expected to accelerate and persist into 2027 due to elevated energy and shipping costs.

How energy prices are lifting daily expenses

As reported by Reuters, the latest rise in oil and gas prices is increasing costs across transport, home heating and a wide range of consumer goods, as geopolitical tensions push Brent crude above $100 a barrel. The Iran war has already driven global diesel prices to record highs, with average British diesel pump prices reaching 2 pounds per litre for the first time this month and U.S. prices hitting a record $6.53 a gallon in September.

In response, U.S. President Donald Trump has allowed red-dyed diesel, normally reserved for equipment and vehicles that do not usually operate on public roads, to be used more broadly until the end of the year. Other household costs are also rising, especially in products tied to oil and gas derivatives, since plastics, packaging materials and polyester-based clothing all depend on petrochemical inputs.

For grocery products, packaging typically accounts for 5% to 15% of manufacturing costs, according to consultancy MAT. U.S. plastic prices rose 7% in August versus October 2025, while consumer prices in the U.S. accelerated in September, with higher gasoline prices accounting for more than half of that increase.

Inflation pressures reach mortgages and winter bills

Higher energy prices are also feeding inflation, adding to the case for central banks to keep borrowing costs elevated and increasing pressure on mortgage holders. In the UK, inflation and borrowing both rose more than expected last month, with the Office for National Statistics saying higher petrol and diesel costs pushed inflation to its highest level since October 2025.

That pattern is also visible in Australia, where the Reserve Bank of Australia raised its cash rate to a 15-year high last month. For a homebuyer with an average A$731,000 loan on a 30-year mortgage, an increase in interest rates from 5.5% in 2025 to 6.2% now lifts annual repayments by about A$3,900, adding to pressure on housing demand and prices.

In the U.S., mortgage purchase activity has weakened as 30-year mortgage rates climbed from around 6.1% to about 7.5%, raising borrowing costs for prospective buyers. Winter heating is becoming more expensive as well, with New York state heating bills likely to rise 47% from a year earlier, according to National Energy Assistance Directors Association data, while EnergyUK estimates British households could face a 10% year-on-year increase in bills this quarter.

Food costs are also at risk of further increases. Data from the United Nations Food and Agriculture Organization shows global food inflation is poised to accelerate further and persist well into 2027 because of shipping disruptions and higher fertiliser costs, which are also linked to natural gas.

Conflict-driven tanker shipping costs are becoming a major new driver of oil prices, with freight in some cases making up a large share of the per-barrel cost. In our earlier article, we explained how attacks and rerouting around risk zones are lifting freight and insurance premiums, pushing up costs that can quickly flow through from fuel prices to groceries and other consumer goods.

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