# New Zealand CPI All groups (linear interpolation of Stats quarterly CPIQ.SE9A — synthetic monthly, not official)

New Zealand CPI All groups (linear interpolation of Stats quarterly CPIQ.SE9A — synthetic monthly, not official) was up 3.7% year on year in September 2026, compared with 3.8% in August 2026.
The level stood at 1,368.0 (index).
Over the past ten years it has ranged from 0.4% (Sep 2016) to 7.3% (Jun 2022), averaging 3.2%.

- Source agency: Stats NZ
- Makrognosis code: `NZ.CPI.M.NSA.METH-INTERP`
- Frequency: monthly
- Units: index
- Coverage: 1914-06-01 to 2026-09-01 (1,348 observations)
- Page: https://makrognosis.robomacro.com/data/new-zealand/cpi-all-groups-linear-interpolation-of-stats-quarterly-cpiq-se9a

## Recent data

| Period | Value | Y/Y % |
|---|---:|---:|
| September 2026 | 1,368.0 | 3.7 |
| August 2026 | 1,365.0 | 3.8 |
| July 2026 | 1,362.0 | 3.9 |
| June 2026 | 1,359.0 | 4.1 |
| May 2026 | 1,352.3 | 3.7 |
| April 2026 | 1,345.7 | 3.4 |
| March 2026 | 1,339.0 | 3.1 |
| February 2026 | 1,335.0 | 3.1 |
| January 2026 | 1,331.0 | 3.1 |
| December 2025 | 1,327.0 | 3.1 |
| November 2025 | 1,324.3 | 3.1 |
| October 2025 | 1,321.7 | 3.1 |
| September 2025 | 1,319.0 | 3.0 |
| August 2025 | 1,314.7 | 2.9 |
| July 2025 | 1,310.3 | 2.8 |
| June 2025 | 1,306.0 | 2.7 |
| May 2025 | 1,303.7 | 2.6 |
| April 2025 | 1,301.3 | 2.6 |
| March 2025 | 1,299.0 | 2.5 |
| February 2025 | 1,295.0 | 2.4 |
| January 2025 | 1,291.0 | 2.3 |
| December 2024 | 1,287.0 | 2.2 |
| November 2024 | 1,284.7 | 2.2 |
| October 2024 | 1,282.3 | 2.2 |

## API

```
curl -H "X-API-Key: $MAKROGNOSIS_KEY" \
  "https://makrognosis.robomacro.com/v1/series/NZ.CPI.M.NSA.METH-INTERP"

# Python
import requests
r = requests.get("https://makrognosis.robomacro.com/v1/series/NZ.CPI.M.NSA.METH-INTERP",
                 headers={"X-API-Key": KEY})
obs = r.json()["observations"]
```