Every time gasoline prices spike, the instinct is to blame somebody. The oil companies. The refiners. The gas station owner who seems to be printing money. The guy with the OPEC mustache.
Some of that instinct is occasionally correct. Most of it misses how gasoline prices actually work. Let's fix that.
The Four Buckets
The retail price of gasoline is essentially four things added together:
- Crude oil cost, the raw input
- Refining margin (crack spread), what it costs to turn crude into gasoline
- Distribution and marketing, getting it from the refinery to the station
- Taxes, federal, state, and sometimes local
The proportions vary, but as a rough guide in the U.S., crude oil typically accounts for about 50-60% of the retail price. Taxes are usually 15-20%. Refining and distribution split the rest.
That means when you're grumbling about paying $3.50 for a gallon, roughly $1.80 of that is crude oil. The other $1.70 is everything else.
The Crude Oil Component
This one is the most visible and the most volatile. WTI and Brent crude prices move daily, sometimes by several percent, and those moves flow through to gasoline prices within days to weeks, not instantly.
There's a lag. Refiners buy crude oil on contract and spot markets. That crude takes time to process. The gasoline you're pumping today was crude oil that was purchased weeks ago. This creates an interesting asymmetry: retail prices tend to rise faster when crude goes up than they fall when crude comes down.
That asymmetry has a name in the economics literature , "rockets and feathers", and it's one of the most empirically well-documented patterns in retail energy pricing. Prices shoot up like a rocket; they drift down like a feather. Draw your own conclusions about why.
The Crack Spread
This is the refiner's margin, the difference between the price of crude oil and the price of the petroleum products that come out of the refinery. The most commonly quoted version is the "3-2-1 crack spread": for every 3 barrels of crude input, a refinery produces roughly 2 barrels of gasoline and 1 barrel of distillate fuel (diesel/heating oil).
When crack spreads are wide, refiners are making good money and have incentive to run hard. When crack spreads collapse, refineries may throttle back production or schedule more maintenance, which can tighten product supply and paradoxically support gasoline prices even if crude is falling.
Crack spreads blow out during the spring refinery turnaround season (roughly February-April), when units go offline for maintenance right as summer blend switching begins and demand starts picking up. This is one reason gasoline prices often rise in the spring even when crude oil is flat.
Taxes: The Part Nobody Wants to Talk About
Federal gasoline tax: 18.4 cents per gallon. That hasn't changed since 1993.
State taxes vary dramatically. California adds over 60 cents per gallon. Texas adds 20 cents. Alaska is among the lowest. When you see a map of average gasoline prices by state and California is always a dollar or more higher than Texas, taxes are a significant part of the story.
The federal gas tax, unadjusted for inflation since 1993, is actually worth less in real terms than it was 30 years ago. This is why U.S. highway infrastructure is perpetually underfunded. But that's a different rant for a different website.
The Gas Station's Cut
Here's where the popular villain falls flat. The average gas station makes between 1 and 3 cents per gallon on fuel. On a 10-gallon fill-up, the station might net 20 cents.
Gas stations stay alive on convenience store sales, car washes, and lottery tickets. The pumps are essentially a traffic acquisition strategy. The station operator is largely a price taker, not a price setter, they're watching the rack price (the wholesale price from the distributor) and marking up the minimum they can while staying competitive with the station across the street.
The next time you're annoyed at a gas station owner, consider that they're probably more annoyed at the rack price than you are.
What Actually Moves the Number on the Sign
In roughly descending order of impact:
- Crude oil price, by far the biggest driver
- Regional refinery outages, a fire or unplanned shutdown at a major refinery spikes local prices fast
- Seasonal blend switching, summer blend is more expensive to produce
- Inventory levels. EIA weekly gasoline data (Wednesdays) moves wholesale prices when draws or builds are larger than expected
- State tax changes, rare but immediate
- Local competition, the station across the street
Understanding these layers doesn't make filling up any cheaper. But it does let you correctly assign blame, which, as a Texan, I consider a fundamental life skill.
This article is for informational purposes only and does not constitute investment advice.