What Gas Costs
and Why
An independent guide to the price at the pumpData release · 11 September 2026

The explanation

Why is gas expensive
in Mississippi?

A large refining system and relatively low fuel taxes help explain US pump prices. Regional fuel rules, transportation and refinery outages still create substantial differences between states.

The reported gasoline price is USD 1.00 per litre for 10 September 2026 (2026-09-10). A useful explanation separates the international product market from the charges and supply conditions specific to this region.

Start with the cost before tax

Two places can face similar crude prices and different pump prices. Compare the pretax portion first, then examine the tax difference. That prevents a change in global oil costs from being mistaken for a new local tax.

Look at supply and the exchange rate

Refining capacity, shipping, pipeline access, product specifications and retail competition affect the downstream portion. US prices avoid a direct currency conversion from dollar-priced crude. The derived portion includes costs and margins, and does not measure net profit.

Match the dates

A monthly refinery breakdown should not be applied unchanged to a weekly pump observation. Tax rates must match their effective dates, and exchange rates should be available on the observation date. Inspect the dated price history and the tax records before drawing a conclusion.

Common questions

How much of the pump price is tax?

For gasoline on 2026-09-10, the recorded tax share is 11.3%. See the data page for the full calculation.

Are refining margins the same as profits?

No. Margins also cover operating costs, transport, storage and other expenses. A margin is not a company’s net profit.

Why does the pump price not follow crude oil immediately?

Pump prices reflect fuel already purchased, changes in wholesale supply, transport, taxes and retail competition. Oil and retail observations also measure different stages and dates.