
The price of diesel fuel is a volatile topic, with prices at the pump varying even over short distances. Diesel prices are influenced by the cost of crude oil, which regularly accounts for around 50% of end consumer prices. In addition, government taxes and duties also make up a significant portion of the pump price. For example, in the UK, fuel duty was cut to 52.95 pence per litre in 2022 following the Russian invasion of Ukraine, which caused fuel prices to increase rapidly. Diesel engines also have better fuel economy than gasoline engines and are used for large commercial vehicles. With the cost of living crisis ongoing, many people are concerned about the future direction of diesel prices and their impact on inflation.
| Characteristics | Values |
|---|---|
| Retail price of diesel | In December 2024, one gallon of diesel cost an average of $3.49 in the US. In June 2022, the highest average price was £1.99 per litre in the UK. |
| Factors affecting price | The price of diesel is influenced by the global price of crude oil, which regularly accounts for around 50% of end consumer prices. Diesel prices can also vary based on location and inflation rates. |
| Government tax | Fuel duty is charged by the government on every litre of fuel sold. In the UK, the rate was 52.95p per litre in 2022 and 57.95p per litre in previous years. At the highest average prices in June 2022, tax to the UK government represented 43-44% of the total price. |
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What You'll Learn

The impact of crude oil prices
The price of diesel fuel is influenced by the global price of crude oil. Crude oil prices have been rising, with Brent Crude surging by nearly 19% in 2023 and crude oil prices overall rising by 28% from January 2021 to February 2021. This has had a direct impact on the price of diesel fuel, pushing it to record highs.
The impact of rising crude oil prices on diesel fuel prices is far-reaching. One of the immediate consequences is the financial burden placed on vehicle owners, who are forced to stretch their monthly budgets to accommodate escalating fuel costs. This can lead to reduced fuel consumption or a switch to more fuel-efficient vehicles. Those dependent on public transportation are also affected as operational costs drive fare hikes.
The logistics and transportation industries are significantly impacted by rising crude oil prices. The increased fuel expenses are often passed on to consumers in the form of higher delivery costs for various products, including basic necessities and more expensive commodities. This, in turn, contributes to higher levels of inflation.
Rising crude oil prices also have a direct impact on the profitability of oil marketing companies and aviation companies, as they struggle to pass on the increased costs to their customers. The stock market may experience fluctuations as these companies revise their petrol and diesel prices, potentially influencing their stock prices and casting uncertainty over the broader market.
Governments rely on fuel duties as a significant source of revenue, and rising crude oil prices can affect their fiscal health. While governments may choose to cut taxes on fuel to provide relief to citizens, this can result in a loss of revenue and deteriorate their fiscal balance, impacting their ability to meet budgetary commitments.
In summary, the impact of rising crude oil prices on diesel fuel prices has wide-ranging consequences, affecting consumers, businesses, and governments alike. It contributes to inflation, influences stock markets, and impacts the fiscal health of nations.
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Tax and government revenue
The price of diesel fuel has a direct impact on tax collection and government revenue. Diesel fuel is subject to various taxes, including excise taxes, sales taxes, and value-added taxes (VAT), which are typically levied on a per-unit or ad valorem (as a percentage of the price) basis. When diesel prices rise, the revenue generated from these taxes also tends to increase. This is because the taxes are usually fixed or proportional to the fuel price, so higher prices result in higher tax yields. For example, a fixed tax of a certain amount per gallon yields more revenue when diesel prices are high compared to when prices are low. Similarly, a percentage-based sales tax generates more tax revenue at higher diesel price levels.
The impact of diesel price changes on government revenue can be significant, especially for countries or regions with high diesel consumption or reliance on diesel fuel taxes. Fluctuations in diesel prices can, therefore, have a noticeable effect on government budgets and fiscal planning. Governments often use fuel taxes as a source of funding for specific purposes, such as infrastructure development or environmental initiatives, so understanding diesel price trends is crucial for policy-making and financial forecasting.
On the other hand, when diesel prices decline, tax revenues from diesel fuel may decrease as well. This can create challenges for governments, particularly if they have become reliant on diesel tax revenues to fund specific programs or initiatives. A sudden drop in diesel prices, if sustained, may require governments to reevaluate their tax policies or find alternative sources of revenue to maintain fiscal stability and continue funding essential services.
It is worth noting that the relationship between diesel prices and tax revenues is not always linear. Demand for diesel fuel can also be a factor. If a significant increase in diesel prices causes a substantial decrease in demand, tax revenues may be impacted. Similarly, technological advancements that improve fuel efficiency or promote the adoption of alternative energy sources could potentially reduce diesel consumption and, consequently, affect tax revenues.
To mitigate the potential volatility in tax revenues due to diesel price fluctuations, governments can employ various strategies. These may include adjusting tax rates, implementing tax incentives, or exploring alternative revenue streams. For instance, a government could introduce a flexible excise tax that automatically adjusts based on diesel price movements, ensuring a more stable tax revenue stream. Alternatively, they could provide tax incentives for the development and adoption of alternative energy sources, reducing reliance on diesel fuel over the long term.
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Inflation and cost of living
The price of diesel fuel is influenced by the global price of crude oil and the wholesale fuel prices that retailers pay. In turn, diesel prices can impact inflation rates. When diesel prices increase, inflation may also rise due to the higher cost of goods and services, resulting in a decrease in the buying power of consumers. This dynamic was evident during the summer of 2022, when average diesel prices hit record highs, contributing to elevated inflation levels.
Inflation refers to the increase in the prices of goods and services over time, which leads to a corresponding decrease in the purchasing power of a given currency. It is often measured by the Consumer Price Index (CPI), which calculates the average cost of a basket of goods and services. Core inflation, on the other hand, excludes volatile prices of products like food and energy, focusing on underlying trends.
Cost of living, while related to inflation, has a distinct focus. It represents the average cost of maintaining an accepted standard of living, encompassing necessities such as food, housing, transportation, taxes, and healthcare. This figure is used to determine the minimum income required to live in different locations. For example, as of October 14, 2023, the cost of living in New York City was 128% higher than the national average.
When inflation rises, the cost of living tends to increase as well. This is because the prices of essential goods and services rise, making it more expensive to maintain the same standard of living. The impact of rising prices is particularly significant for middle-class and lower-income households, as they may have less money for savings, discretionary spending, or major purchases. To adapt, consumers may buy less, switch to cheaper alternatives, or delay significant purchases.
To mitigate the effects of inflation on their cost of living, individuals can aim to increase their income at a rate similar to or higher than the inflation rate. Additionally, they can adjust their spending habits, seek cheaper alternatives, and prioritize savings. However, it's important to note that the cost of living varies widely by region and demographic group, so the specific strategies for managing its impact may differ depending on individual circumstances.
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Regional price variations
The price of diesel fuel can vary significantly from region to region, even within the same country. In the UK, for example, there can be substantial price variations between different filling stations located just a short distance apart. In March 2024, an investigation uncovered a 27p per litre difference in petrol prices between two nearby filling stations.
Several factors contribute to these regional price discrepancies. Firstly, wholesale fuel prices, which are influenced by the global price of crude oil, play a significant role in determining the price at the pump. Crude oil prices can be affected by supply restrictions or weak demand outlooks, leading to fluctuations in diesel prices. For instance, in the latter half of 2024, a decrease in crude oil prices resulted in lower diesel prices.
Government policies and taxation also impact regional price variations. Fuel duty, a tax levied on every litre of fuel sold, contributes a significant portion of the pump price. Changes in fuel duty rates, such as the cut to 52.95p in 2022 following the Russian invasion of Ukraine, can cause rapid increases or decreases in fuel prices. Inflation rates are another critical factor influencing diesel prices. Higher fuel prices contribute to higher inflation levels, and vice versa.
Understanding these regional price variations can help consumers make informed decisions when purchasing diesel fuel. Resources like the RAC Fuel Watch section and the myRAC app enable drivers to locate the cheapest fuel options in their vicinity, ensuring they obtain the best value for their money.
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Commercial vehicle usage
The price of diesel fuel has a significant impact on commercial vehicle usage. As fuel prices rise, operating costs for commercial vehicles increase, affecting the transportation industry's productivity and social welfare. Commercial vehicles, such as trucks, trains, and ships, are particularly vulnerable to fuel price hikes due to their high fuel consumption and travel distances.
Gohari et al.'s study in 2018 examined the impact of fuel prices on transportation vehicle operating costs. It found that an 18-ton truck had the highest operating costs, followed by a 5-ton truck. These larger vehicles are more affected by fuel price increases due to their greater fuel consumption and travel distances. Levinson et al.'s study in 2005 also analyzed the operational expenses of commercial vehicles based on truckloads, providing insights into the relationship between fuel prices and commercial vehicle operations.
The transportation industry plays a crucial role in the economy, and fluctuations in diesel fuel prices can disrupt the sector. When fuel prices rise, transportation companies may pass on the increased costs to their customers, leading to higher prices for goods and services. This, in turn, can influence consumer behaviour and spending patterns, potentially resulting in a decrease in demand for certain products or services.
Additionally, fuel prices can impact the operational strategies of commercial vehicles. For example, companies may opt for more fuel-efficient vehicles or introduce computer-assisted scheduling systems to optimize routes and reduce fuel consumption. The adoption of green practices and technologies can help mitigate the impact of rising fuel prices and also contribute to environmental sustainability by reducing CO2 emissions.
It's worth noting that the relationship between fuel prices and commercial vehicle usage is complex and influenced by various factors. These include international demand for distillate fuel, seasonal variations in heating oil demand, transportation costs, local market conditions, and government policies on fuel duties and taxes. Understanding these dynamics is essential for businesses and policymakers to make informed decisions and mitigate the negative consequences of fluctuating fuel prices.
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Frequently asked questions
The price of diesel fuel is influenced by the global price of crude oil, wholesale fuel prices, and demand.
Higher diesel prices can contribute to higher levels of inflation, and vice versa.
Fuel duties are taxes imposed by governments on fuel sales, which can significantly impact the price of diesel. For example, in the UK, fuel duty can account for around 43-44% of the total price of diesel.
You can save money on diesel fuel by using apps that help locate the cheapest fuel in your area, such as the myRAC app. Additionally, driving efficiently and familiarising yourself with the cheapest filling stations in your area can also help reduce fuel costs.
Generally, gasoline is more widely available and tends to sell at a lower retail price than diesel fuel. However, diesel engines typically have better fuel economy, which is why they are often used for large commercial vehicles.











































