# When do fuel stations change their prices in Iceland?

Window: Jul 10, 2026 – Oct 7, 2026 · 90 days · rebuilt every night

- A station in Iceland changes its Petrol 95 (E5) price 3.81 times a week on average, and a price that has just changed then holds for 1 day before the next one.
- On an ordinary day 99.6% of the stations in Iceland change their price; on the busiest day of the window, 100.0%.
- The busiest weekday is Thursday, with 22.3% of all changes; the quietest is Monday, with 0.0%.
- An increase moves the price by 0.0 ISK/L on average, a cut by 0.0 ISK/L. Over the window there were 8 575 changes upward and 3 413 downward.
- Half of all the price changes of the last 89 days happened on just 25 of them.
- When N1 moves, 100% of its own stations move on the same day — the price of a station in this network is not set at the station.
- N1 reaches the centre of a market-wide move first in 10 of the 12 waves we measured; the rest follow at a median of 0.0 days.
- Across the window the market median went from 1.6 ISK/L to 2.1 ISK/L.

## Petrol 95 (E5)

- Changes per station: 3.81 / week
- A price holds for: 1 day
- Stations: 245 · 11 988 price changes

| Which weekday | increase | cut |
|---|---:|---:|
| Monday | 2 | 0 |
| Tuesday | 2 019 | 429 |
| Wednesday | 1 555 | 652 |
| Thursday | 1 723 | 952 |
| Friday | 1 631 | 572 |
| Saturday | 1 398 | 808 |
| Sunday | 247 | 0 |

- increase: 0.0 ISK/L (n=8 575)
- cut: 0.0 ISK/L (n=3 413)

| Network | Stations | Changes / station / week | Together | Behind the first mover |
|---|---:|---:|---:|---:|
| N1 | 81 | 3.81 | 100% | first |
| Orkan | 73 | 3.81 | 100% | first |
| ÓB | 47 | 3.81 | 100% | first |
| Atlantsolía | 24 | 3.81 | 100% | first |

## Diesel

- Changes per station: 3.96 / week
- A price holds for: 1 day
- Stations: 245 · 12 468 price changes

| Which weekday | increase | cut |
|---|---:|---:|
| Monday | 2 | 0 |
| Tuesday | 2 181 | 249 |
| Wednesday | 1 558 | 902 |
| Thursday | 1 730 | 946 |
| Friday | 2 116 | 331 |
| Saturday | 1 398 | 808 |
| Sunday | 247 | 0 |

- increase: 0.0 ISK/L (n=9 232)
- cut: 0.0 ISK/L (n=3 236)

| Network | Stations | Changes / station / week | Together | Behind the first mover |
|---|---:|---:|---:|---:|
| N1 | 81 | 3.89 | 100% | first |
| Orkan | 73 | 4.04 | 100% | first |
| ÓB | 47 | 3.97 | 100% | first |
| Atlantsolía | 24 | 4.04 | 100% | first |

## How this was measured

One price per station per day. The daily history table holds one row per station, fuel and day. A row is also written back to the date the source itself gives as the moment of the change, so a change lands on the day the operator made it, not on the day we happened to read it.
A change is two consecutive days in a station’s series with different prices; it is counted on the second of the two. If more than 3 days separate the two readings, the pair is dropped — there is no way to say which day the price moved.
A market-wide move — a “wave” — is a run of days on which at least 100% of the stations with a price changed it; the threshold is not a fixed number but the market’s own median plus half the way to its 95th percentile. Within a wave each network gets the centre of gravity of its own changes; the network whose centre falls earliest moved first. Waves found in this window: 12.
The figures are rebuilt once a night from the full history, not on every visit.

## What this cannot tell you

At most one change per station per day is visible, because the history keeps one price per station per day. A station that changes twice in one day is counted once.
It cannot be established for Iceland. Our history keeps one price per station per day, so we know the day a price changed but not the hour. Nothing on this page claims otherwise.

Source of the prices: Gasvaktin (gasvaktin.is) open fuel-price data, MIT licence. Analysis: fuel-prices.eu.

Live fuel prices in %s: https://www.fuel-prices.eu/live/iceland/

HTML: https://www.fuel-prices.eu/live/iceland/price-changes/
JSON: https://www.fuel-prices.eu/live/iceland/price-changes/data.json