Economics for the Curious

Why Are Gas Prices So High?

How prices work, what goes into a gallon, why prices jump so fast, and what government can and can’t do

Figures current as of mid-October 2026

10 min read

How Prices Work

When gas prices jump, the easy explanation is greedy companies. When prices fall, the same companies must have turned generous overnight. Neither story holds up. Start with how economists describe a market economy.

Greed is a constant, and a constant can’t explain a change. Oil companies and station owners wanted to earn as much as possible at $2.98, too. To explain why a price moved, look for what changed. Think of a price as the result of several forces at once, and work through five questions.

The Price Detective Checklist
The Price Detective ChecklistWhat to look forIn the gas market
1. Supply and demand. What shifted, and how strongly do buyers and sellers respond?Shifts in supply or demand; price elasticities of demand and supplyA war cut oil supply, and drivers can’t cut back quickly
2. Government. Did a price control, tax, subsidy, quota, or tariff change?Price ceilings and floors, taxes, subsidies, quotas, tariffs, and mandatesPer-gallon gas taxes, fuel blend rules, ethanol mandates, shipping rules
3. Market power. How competitive is the market?Number of sellers, barriers to entry, and how many alternatives and substitutes buyers haveOPEC+, a few refineries serving one region, the lone station at an interstate exit
4. Price discrimination. Do different buyers pay different prices for the same thing?Price differences by customer, place, or payment that costs don’t explainPremium grades, loyalty discounts, cash prices
5. Inflation. Is it one price, or nearly all prices?Monetary policy of the Federal Reserve and fiscal policy of the federal governmentGas is one price; check overall inflation and the Fed

Start Here: What Changed?

On February 28, 2026, war broke out between the United States, Israel, and Iran. Tanker traffic through the Strait of Hormuz, which normally carries about one-fifth of the oil the world uses, nearly stopped.

What Changed?: Moment
MomentGas (U.S. average)Brent spot, per barrel
Late February, as the war began$2.98about $71
Mid-Aprilabout $4.09about $120
Early October$4.37about $125

What changed, and what didn’t? American oil wells, refineries, and gas taxes were mostly the same in October as in February. So why did the price of a gallon rise by about $1.40?

Running the Checklist on Gasoline

1 What’s in a gallon

In May 2026, when gas averaged $4.48, each gallon broke down like this:

Running the Checklist on Gasoline: Part of the price
Part of the priceSharePer gallonWhat drives it
Crude oil52%$2.33The world oil price: global supply and demand, wars, and OPEC+ output decisions
Refining22%$0.97Turning crude into gasoline: refinery capacity, breakdowns, and seasonal fuel blends
Distribution and marketing15%$0.66Pipelines, trucking, station costs, and retail margins
Taxes12%$0.52Federal tax of 18.4 cents plus state taxes averaging about 33 cents

2 Supply and demand: why prices jump so fast

  • Drivers can’t cut back quickly. Most people still have to get to work, school, and the store. Economists estimate that a 10 percent rise in gas prices cuts gallons bought by less than 1 percent in the short run, and by about 4 percent over many years. When buyers barely respond, even a small loss of supply forces a big price increase before the market settles.
  • Oil is priced in a world market. A barrel of oil is worth the same wherever it was pumped. The U.S. has sold more petroleum abroad than it buys since 2020, but American producers still sell at the world price, so American drivers pay it too. Energy independence is not price independence.
  • Crude isn’t gasoline. Oil has to be refined into the blends required by law, which change between summer and winter and differ by region. When refineries run near full capacity or one breaks down, the refining margin widens and pump prices rise even if crude prices don’t.

3 Government: taxes, tariffs, and rules

Notice what the taxes do. The federal tax has been 18.4 cents a gallon since 1993, and state taxes range from 9 cents to about 71 cents in California. Because they are charged per gallon, not as a percentage, taxes don’t rise when oil does. They explain why gas costs more in one state than the next, but not why prices spike. In fact, the tax share of the price shrinks as prices rise.

Taxes are only one kind of intervention. A tariff on imported crude or gasoline raises what refiners pay. The Renewable Fuel Standard works like a quota, requiring a minimum amount of ethanol and other biofuels in the fuel supply. The Jones Act requires ships carrying goods between U.S. ports to be American-built, owned, and crewed, which raises the cost of moving fuel by sea from Gulf Coast refineries to other U.S. coasts. Rules like these mostly raise the level of prices or the gap between regions; a sudden spike needs something new.

READ How Do People Respond to Prices?, sections ② and ③. Drivers cut back more over years than over weeks, and the person who pays a gas tax at the pump isn’t always the one who bears it.

4 Market power: does anyone control the price?

Market power is a seller’s ability to raise its price without losing most of its customers. It depends on how competitive the market is, and so on how many alternatives and substitutes buyers have.

  • OPEC+ is a cartel. Its members coordinate how much oil to pump, so they can raise the world price by holding back output. Their power has limits: members often cheat on quotas, and higher prices draw more oil from producers outside the group, including the U.S.
  • Refining can be concentrated. Where only a few refineries serve a region and outside supply is hard to bring in, each one has more say over the price.
  • Gas stations compete locally. A lone station at an interstate exit can charge more than four stations sharing one corner, because its customers have fewer nearby choices.

Notice the test. Market power helps explain why prices are higher in some places than others. It explains a sudden jump only if competition itself changed, as when a refinery closes or a cartel cuts output.

5 Price discrimination: do some buyers pay more?

Price discrimination means charging different buyers different prices for the same good when cost doesn’t explain the difference. It takes some market power and a way to sort customers by willingness to pay. Examples at the pump:

  • Premium grades. The extra price of premium is often larger than its extra cost to make, so drivers who choose it pay a bigger markup.
  • Loyalty points and cash prices. Drivers who sign up, track points, or pay cash get a lower price; everyone else pays the posted price. Card fees explain only part of the cash discount.
  • Zone pricing. Refiners may charge stations different wholesale prices in different neighborhoods, depending on local competition.

It explains why different drivers pay different prices, not why the average price rose for everyone.

6 Inflation: one price, or nearly all prices?

When nearly all prices rise together, look first at the Federal Reserve and the federal government. Fast growth in money and credit, or large deficits that add to total spending, can push up the whole price level. No gas station can do that.

There is a difference between a relative price change and inflation. A war that makes oil scarce raises the price of gasoline compared with other goods. That is a relative price change: the market signaling scarcity. Inflation is a sustained rise in the overall price level, when the dollar buys less of nearly everything.

The two are connected. Gasoline is part of the consumer price index, so a spike raises measured inflation right away; in August 2026, gasoline accounted for over one-third of the month’s overall price increase. Higher fuel costs also raise the cost of shipping almost everything else.

What Can Government Do?

What Can Government Do?: Tool
ToolHow it worksThe catchVerdict
Release oil from the Strategic Petroleum ReserveAdds crude to the market during an emergency. The U.S. has agreed to release 172 million barrels.It adds crude, not gasoline, so it helps less when refineries are already full. The reserve is now at its lowest level since 1982, leaving less for the next emergency.A useful short-term cushion, but limited and finite
Suspend the gas taxRemoves the federal 18.4 cents or a state tax for a few months.Not all of the cut reaches drivers; Georgia’s 2022 holiday passed about 60 percent of it to pump prices. It helps heavy drivers most and drains highway funds.Modest, temporary relief
Cap prices or ban “gouging”Sets a legal maximum price or profit margin.A price held below the market level means buyers want more than sellers offer. The 1970s brought shortages, rationing, and hours-long lines.Usually backfires
Expand long-run supplySpeeds permits for pipelines and refineries, and simplifies the many special regional fuel blends.New oil fields and refineries take years to build. Nothing passed today lowers next week’s price.Lowers prices and swings over time

The option most often overlooked is letting the price work. A higher price tells drivers to conserve, tells producers worldwide to pump and ship more, and makes alternatives worth investing in. That is how the market rations a scarce good without lines or a government allocation plan.

WATCH Price Ceilings: Lines and Search Costs and Price Ceilings: Misallocation of Resources (Marginal Revolution University)

Fair Challenges

Decide what you think of each challenge first, then open the response.

“Oil companies are just gouging us.”
Greed didn’t suddenly rise in March, and companies don’t set the world oil price. Pump prices do often rise faster than they fall, a pattern called “rockets and feathers,” and profits jump in a shortage. Those profits signal where new supply is needed.
“Companies made record profits in 2021–22, so they caused the inflation.”
Profits did rise, and wider margins made up much of 2021’s price increases. Some economists, such as Isabella Weber, argue that supply shocks let large firms raise prices together. Others note that prices rise ahead of costs when spending outruns what can be made, and those windfalls tell producers to make more. Researchers at the San Francisco Fed found that markups across the whole economy stayed about flat through the recovery, much as in past recoveries; big increases were limited to a few industries, such as cars and gasoline. They also found that markups played little role when inflation later slowed. Where high margins last after costs fall, look at market power, not greed.
“We should just drill more.”
More U.S. production helps over years, not weeks. The U.S. already sells more petroleum abroad than it buys, yet drivers here still pay the world price.
“Capping prices is fairer to the poor.”
A cap creates shortages that hurt everyone, including the poor. Direct help such as cash rebates protects struggling families without blocking the price signal.
“Gas should cost more because of pollution.”
Some economists argue that driving imposes costs on others, such as pollution and congestion, and favor a fuel or carbon tax to account for them. Critics note it falls hardest on rural and lower-income drivers unless the revenue is returned.

The Normative Question

Economics can show what each policy does to prices, supply, and shortages. It can’t decide how much a society should cushion people from a supply shock, or who should pay for that cushion. Letting prices rise rations fuel efficiently but hurts some families more than others. Every choice, including doing nothing, puts the burden on someone.

Key Terms in Plain Words

Inelastic demand
When quantity bought changes little as price changes, as with gasoline in the short run.
Relative price change
One good becoming more expensive compared with others.
Fungible
Interchangeable. A barrel of oil is worth the same wherever it was pumped.
Supply shock
A sudden event that raises costs or cuts supply across the economy.
Refining margin
The gap between the price of crude and the wholesale price of gasoline, also called the crack spread.
Strategic Petroleum Reserve
The federal government’s emergency stockpile of crude oil.
Per-gallon tax
A fixed tax per unit, such as the 18.4-cent federal gas tax. It does not rise when prices rise.
Price ceiling
A legal maximum price. Set below the market level, it causes shortages.
Market power
A seller’s ability to raise its price without losing most of its customers.
Cartel
A group of sellers that coordinates output to raise prices, such as OPEC+.
Price discrimination
Charging different buyers different prices for the same good when cost doesn’t explain the gap.
Profits and losses
The market’s reward for creating value for customers and its penalty for wasting scarce resources.

Sources