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Petrol and diesel prices (monthly CPI indexes): NZ data and downloads

Petrol price index (monthly) was 1,629.0 index in Aug 2026, up 17.9% on a year earlier.

Updated

Source: Stats NZ Tatauranga Aotearoa. Last retrieved 10 October 2026.

Petrol and diesel prices (monthly CPI indexes)
Petrol price index (monthly)Diesel price index (monthly)
Petrol and diesel prices (monthly CPI indexes). Petrol price index (monthly), Jun 2011 to Aug 2026, latest 1629.0. Diesel price index (monthly), Jun 2011 to Aug 2026, latest 2396.0.01,0002,0003,0004,0002011201420162019202120242026
Show the figures
PeriodPetrol price index (monthly) (index)Diesel price index (monthly) (index)
Aug 20261629.02396.0
Jul 20261597.02206.0
Jun 20261694.02510.0
May 20261769.02854.0
Apr 20261839.03222.0
Mar 20261633.02358.0
Feb 20261377.01653.0
Jan 20261397.01677.0
Dec 20251432.01733.0
Nov 20251430.01726.0
Oct 20251405.01676.0
Sep 20251394.01658.0
Aug 20251382.01643.0
Jul 20251387.01635.0
Jun 20251370.01598.0
May 20251375.01614.0
Apr 20251413.01684.0
Mar 20251434.01723.0
Feb 20251465.01763.0
Jan 20251468.01763.0
Full data: fuel price index monthly
Aug 2026Petrol price index (monthly) 1629.0Diesel price index (monthly) 2396.0
Petrol and diesel prices (monthly CPI indexes). Petrol price index (monthly): 1629.0 in Aug 2026. Diesel price index (monthly): 2396.0 in Aug 2026.

Lines break at accounting-basis changes and missing periods. Source: Stats NZ Tatauranga Aotearoa.

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Petrol and diesel prices (monthly CPI indexes): NZ data and downloads: definitions

Monthly CPI indexes for petrol and diesel, tracking changes in pump prices including taxes.

Petrol and diesel prices (monthly CPI indexes): NZ data and downloads: comparison limits

These affect how the figures can be compared.

  • Indexes of price change, not prices per litre.
  • Diesel is mostly bought by businesses; road user charges are paid separately and are not in the pump price.

Petrol and diesel prices (monthly CPI indexes): NZ data and downloads: data by period

The latest ten periods for up to the first six series. Downloads contain every published observation.

PeriodPetrol price index (monthly)Diesel price index (monthly)
Aug 20261,629.0 index2,396.0 index
Jul 20261,597.0 index2,206.0 index
Jun 20261,694.0 index2,510.0 index
May 20261,769.0 index2,854.0 index
Apr 20261,839.0 index3,222.0 index
Mar 20261,633.0 index2,358.0 index
Feb 20261,377.0 index1,653.0 index
Jan 20261,397.0 index1,677.0 index
Dec 20251,432.0 index1,733.0 index
Nov 20251,430.0 index1,726.0 index

Petrol and diesel prices (monthly CPI indexes): NZ data and downloads: questions for your AI

Download the file, attach it in the assistant you use, then paste the prompt. Whatever it tells you is its reading of the data, not ours.

  1. 1Download fuel-price-index-monthly.csv
  2. 2Attach it in ChatGPT, Claude, Gemini or another assistant
  3. 3
    Paste this prompt

    The attached CSV is Petrol and diesel prices (monthly CPI indexes) (fuel-price-index-monthly), from Stats NZ Tatauranga Aotearoa, Selected price indexes (monthly). Describe how each measure has changed, naming its unit and period. Treat changes in basis and missing periods as breaks. Distinguish observation from explanation. Limitations: Indexes of price change, not prices per litre. Diesel is mostly bought by businesses; road user charges are paid separately and are not in the pump price.. Do not infer causation from changes during government terms.

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Petrol and diesel prices (monthly CPI indexes): NZ data and downloads: sources

The source publication, licence and snapshot used to build this page.

Organisation
Stats NZ Tatauranga Aotearoa, Selected price indexes (monthly)
Licence
Creative Commons Attribution 4.0 International (CC BY 4.0). This work is based on Stats NZ's data which are licensed by Stats NZ for reuse under the Creative Commons Attribution 4.0 International licence.
Reuse limits
Photos, graphics and logos are excluded. Stats NZ logos and government emblems must not be used.
Snapshot
data/raw/statsnz-selected-prices/2026-10-10_40d16d35fc10.csv
SHA256
40d16d35fc107e8d9225698e95ffb9044a6ebcaad2bd83d7aa44b4cd52bc790c
Retrieved
10 October 2026