The cost of crude oil accounts for approximately 51% of the price consumers pay for a gallon of gasoline in the United States, according to the U.S. Energy Information Administration (EIA). Other factors such as refining, distribution, marketing, and taxes make up the remainder of the cost, illustrating that oil prices alone do not determine gas prices at the pump.
As of late April 2026, average gasoline prices in the U.S. reached $3.91 per gallon amid ongoing conflict involving Iran, which has increased crude oil prices by about 38% since hostilities began in late February. Brent crude oil prices hovered around $100 per barrel, up from roughly $73 prior to the conflict. Patrick De Haan, a petroleum analyst at GasBuddy, explained that although oil prices are the largest variable affecting gas costs, they do not directly translate dollar-for-dollar to pump prices.
Breakdown of Gasoline Costs
The refining process, which transforms crude oil into various petroleum products including gasoline, constitutes about 20% of the final price. Marketing and distribution costs add another 11%, covering expenses such as transporting fuel to gas stations and retail operations. Gas station operators typically earn a margin of 30 to 35 cents per gallon, though margins tend to shrink when oil prices surge rapidly and expand when prices fall.
Taxes also form a notable portion of the gas price. The federal excise tax on gasoline is fixed at 18.4 cents per gallon and funds highway infrastructure projects. State taxes vary widely, averaging about 34 cents per gallon but ranging from as high as 70.9 cents in California to as low as 9 cents in Alaska. These variations often explain price differences when crossing state lines.
Seasonal and Market Factors Affecting Prices
Seasonal changes also influence pump prices. States begin switching to summer-grade gasoline blends between February and March, which are more costly to produce due to environmental regulations designed to reduce emissions in warm weather. This blend is mandated to be sold from June 1 to September 15 nationwide and can add roughly 15 cents to the per-gallon price during warmer months.
Further, demand for gasoline typically rises in spring and summer months as more drivers take to the road, contributing to higher prices during these periods.
Why it matters
Understanding the components behind gas prices helps consumers contextualize price fluctuations amid geopolitical events and seasonal changes. While crude oil remains the largest cost driver, refining capacity, transportation logistics, taxation policies, and regulatory fuel standards all play critical roles in how much Americans pay to fuel their vehicles. This multifaceted pricing structure means that no single factor can fully predict gas price trends.
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