Markets and rules

Government-fixed price: why some fuel charts look like steps

Short answer

A government-fixed price is a fuel price set by a regulator instead of the market, and changed only on set revision dates or by decree. It stays flat between revisions, then jumps, which is why we draw it as a step line rather than a smooth one.

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What a government-fixed price is

A government-fixed price is a pump price set by a government or a regulator rather than left to move with supply and demand. It changes only when the authority revises it, on a schedule or, sometimes, by a specific decree.

Between revisions the price stays exactly flat, however the underlying cost of crude oil, refining or currency moves in the meantime. That flat stretch, followed by a sudden jump, is the signature that marks a fixed price apart from a market one.

How it looks on a chart

A market price drifts continuously as costs change. A fixed price holds steady, then jumps on its revision date.

Fixed price, revised monthly Market price

Illustrative example. A fixed price, revised monthly, here, moves in steps; a market price moves continuously.

How often a fixed price is revised

How often a fixed price is revised varies widely by country, and it changes how a chart of that country will look.

Daily or near-daily

Adjusted very frequently, close to tracking the market with a short lag.

Weekly

Reset on a fixed day each week, often to match a benchmark from the week before.

Biweekly

Reset roughly every two weeks.

Monthly

Reset once a month, so the price can stay flat for weeks between updates.

Quarterly or by decree

Changed rarely, sometimes only when a government issues a specific order.

Why governments fix fuel prices

Governments fix fuel prices for several overlapping reasons.

Shielding consumers

Governments smooth out short-term swings in the world oil price so drivers aren't hit by sudden jumps.

Controlling inflation

Fuel feeds into the cost of transport and goods, so a fixed price is one lever against headline inflation.

Subsidy management

A price can be fixed below the market cost, with the gap paid by the state; see fuel subsidy.

Revenue planning

A predictable price makes it easier for the state to plan the tax revenue and any subsidy cost that come with it.

How this differs from a subsidy

A fixed price is not automatically a subsidised one. A government can fix a price that still covers the underlying cost, or fix a price below cost and cover the gap itself, which is a fuel subsidy. The two labels describe different things and can apply together.

How this shows up on FuelTheGuide

We label a series as government-fixed when the underlying source identifies it that way, and we draw it as a step line rather than a sloped one, so a flat stretch reads as a real, current price rather than a stale one. Where we know the revision cadence, we show it in the tooltip.

⊙ Government-fixed Set by a regulator or decree, changed on a schedule. Drawn as a step line.

↓ Subsidised market A fixed or market price kept below the underlying cost by state support. Can overlap with the fixed price label.

~ Market-priced No fixed or approve label. Moves with supply, demand and exchange rates, and is drawn as a normal line.

See the fixed-price label in the price explorer →

Questions and answers

Why does a government-fixed price sometimes still change between revision dates?

Occasionally a government issues an out-of-schedule adjustment, usually in response to a large jump in the world oil price or exchange rate. These show as an extra step outside the usual cadence.

Is a government-fixed price always lower than a market price?

Not necessarily. A fixed price can be set above market cost, at cost, or below it. When it is set below cost the gap is usually filled by a fuel subsidy. When it is set above cost it acts more like a revenue measure.

Can a country switch from fixed to market pricing?

Yes, and several have done so, sometimes gradually and sometimes overnight. The transition often involves removing a subsidy at the same time and can cause a sharp price jump at the moment of the switch.

How can I tell a fixed price from missing data on a chart?

A fixed price shows as a perfectly flat line that ends with a vertical step. Missing data shows as a gap or break in the line. On our site we also label fixed-price series with the Government-fixed badge in the tooltip.

Sources and further reading

Weekly Oil Bulletin, price regulation notes European Commission, energy.ec.europa.eu id
Fuel subsidies and pricing policy International Energy Agency, iea.org id
Fuel prices tool and quality labels OpenVan.camp, openvan.camp/compare/fuels/fuel-prices id