{
  "better_direction": null,
  "coverage": {
    "end": "2026-08-31",
    "start": "1961-01-01"
  },
  "description": "Annual percentage change in the prices of everyday essentials, monthly: food (Food Price Index), petrol and diesel, and rents for new tenancies and for all tenancies.",
  "id": "cost-of-living-price-changes",
  "issues": [],
  "kind": "rate",
  "limitations": [
    "Fuel prices swing with world oil prices and the exchange rate; also see the petrol tax breakdown (to be added)."
  ],
  "provenance": {
    "adapter": "derive:change",
    "formula": "Annual change (%) = (index this month ÷ index same month last year − 1) × 100",
    "inputs": [
      {
        "content_hash": "621d543d1246f751d385222359b2e8aa103b779febd81a04a01896d2b855779b",
        "dataset": "food-price-index",
        "series": "CPIM.SE901",
        "source": "Stats NZ Tatauranga Aotearoa \u2014 Selected price indexes (monthly)"
      },
      {
        "content_hash": "216d46b3e39d9240e13f1d4ea832925f1e0fe929df2a86ff3b8a0d60cdd25a7b",
        "dataset": "fuel-price-index-monthly",
        "series": "CPIM.SE9072020000",
        "source": "Stats NZ Tatauranga Aotearoa \u2014 Selected price indexes (monthly)"
      },
      {
        "content_hash": "216d46b3e39d9240e13f1d4ea832925f1e0fe929df2a86ff3b8a0d60cdd25a7b",
        "dataset": "fuel-price-index-monthly",
        "series": "CPIM.SE9072030001",
        "source": "Stats NZ Tatauranga Aotearoa \u2014 Selected price indexes (monthly)"
      },
      {
        "content_hash": "e240e45f01aa3403529a21cfe0a9208adbfc68d6cee44074674f03402f22027c",
        "dataset": "rents-index-monthly",
        "series": "CPIM.SE9041F",
        "source": "Stats NZ Tatauranga Aotearoa \u2014 Selected price indexes (monthly)"
      },
      {
        "content_hash": "e240e45f01aa3403529a21cfe0a9208adbfc68d6cee44074674f03402f22027c",
        "dataset": "rents-index-monthly",
        "series": "CPIM.SE9041S",
        "source": "Stats NZ Tatauranga Aotearoa \u2014 Selected price indexes (monthly)"
      }
    ],
    "origin": "calculated",
    "retrieved_at": "2026-10-10T18:33:26.808Z",
    "sha256": "a19bf4399b523b3d98601a26dd394834d6ef480126c95e9d78f08aecfffbd033",
    "snapshot": ""
  },
  "related": [
    "inflation-rate",
    "grocery-prices",
    "rents-index-monthly"
  ],
  "series": [
    {
      "frequency": "monthly",
      "id": "CPIM.SE901.pct-change-1y",
      "notes": [],
      "observations": [
        {
          "end": "1961-01-31",
          "label": "Jan 1961",
          "period": "1961-01-31",
          "start": "1961-01-01",
          "value": 2.68270158715
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        {
          "end": "1961-02-28",
          "label": "Feb 1961",
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          "start": "1961-02-01",
          "value": 2.52100773569
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        {
          "end": "1961-03-31",
          "label": "Mar 1961",
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          "value": 2.35404889699
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        {
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        {
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          "value": 1.40712907362
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        {
          "end": "1961-06-30",
          "label": "Jun 1961",
          "period": "1961-06-30",
          "start": "1961-06-01",
          "value": 0.558139384518
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        {
          "end": "1961-07-31",
          "label": "Jul 1961",
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        {
          "end": "1961-08-31",
          "label": "Aug 1961",
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          "value": 1.53291317946
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        {
          "end": "1961-09-30",
          "label": "Sep 1961",
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          "value": 0.361991395013
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        {
          "end": "1961-10-31",
          "label": "Oct 1961",
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        {
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        {
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          "label": "Dec 1961",
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        {
          "end": "1962-01-31",
          "label": "Jan 1962",
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          "start": "1962-01-01",
          "value": 0.5405403937
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        {
          "end": "1962-02-28",
          "label": "Feb 1962",
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          "value": 0.63752314708
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        {
          "end": "1962-03-31",
          "label": "Mar 1962",
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          "value": 1.47194127878
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        {
          "end": "1962-05-31",
          "label": "May 1962",
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        {
          "end": "1963-01-31",
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        {
          "end": "1963-02-28",
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          "label": "Apr 1963",
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          "end": "1963-05-31",
          "label": "May 1963",
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        {
          "end": "1963-06-30",
          "label": "Jun 1963",
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        {
          "end": "1963-07-31",
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        {
          "end": "1963-08-31",
          "label": "Aug 1963",
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        {
          "end": "1963-09-30",
          "label": "Sep 1963",
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        {
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        {
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        {
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      ],
      "period_convention": "Calendar months",
      "source_label": "CPI Monthly Rents (National) | National | Actual rentals for housing | Stock",
      "title": "Rents across all tenancies, annual % change",
      "unit": "percent"
    }
  ],
  "source": {
    "id": "derived",
    "landing_url": "https://nzinnumbers.co.nz/methodology",
    "licence": {
      "attribution": "Calculated by NZ in Numbers from the source datasets listed; please also credit those sources.",
      "checked_on": "2026-10-10",
      "evidence": "Our own calculations, released under CC BY 4.0. Input data keep their own licences (see inputs).",
      "name": "Creative Commons Attribution 4.0 International (CC BY 4.0)",
      "reuse": "open-licence",
      "status": "confirmed",
      "url": "https://creativecommons.org/licenses/by/4.0/"
    },
    "name": "NZ in Numbers calculation",
    "organisation": "NZ in Numbers"
  },
  "title": "Price changes for food, fuel and rent",
  "topic": "cost-of-living"
}
