RIANZ's weekly singles chart

The Official New Zealand Music Chart is the weekly New Zealand top 40 singles and albums charts, issued weekly by Recorded Music NZ (formerly Recording Industry Association of New Zealand (RIANZ)). The chart also includes the top-20 New Zealand artist singles and albums and top 10 compilation albums. All charts are compiled from data of both physical and digital sales from music retailers in New Zealand.

The singles chart is currently sales and streaming data of songs. In June 2014 it was announced that the chart would also include streaming; this took effect for the chart published 7 November 2014 and dated 10 November 2014. Previously airplay was factored into the chart methodology as well.

Prior to 2004, RIANZ also published an annual ranking chart of singles and albums released in New Zealand. Position was awarded by a simple scoring system whereby a number one in one week gets 50 points, a number two gets 49 points and so on, then all weeks are added together. From 2004 onwards, however, the annual charts have songs positioned based on the number of sales for that year.

From April 2007 to October 2011, the charts were displayed and archived at the website radioscope.net.nz which listed 13 different charts, most notably RadioScope100 and NZ40 Airplay Chart. In November 2011, RIANZ launched an updated chart website. The new Chart website also provides the ability to listen to song previews, view music videos, and buy tracks and albums.

In May 2015, Recorded Music NZ celebrated the 40th anniversary of the Official NZ Top 40 Music Charts. An event was held at Vector Arena in Auckland and featured performances from 16 artists from New Zealand and overseas who had previously achieved various chart milestones, including most number ones, most chart entries, most weeks in the chart and most weeks at number one).

As part of the celebrations, a limited edition single pressed on red vinyl was released, with Tiki Taane's song "Always on my Mind" (the New Zealand track to spend the most weeks - 55 - in the singles chart) and Scribe's song "Stand Up" (the New Zealand single to spend the most weeks - 12 - at number one.

The following chart achievements were noted:

From June 2016, the method of determining certifications was changed to a points-based system based on a combination of physical sales, digital sales and online streams. For singles, 175 streams is considered equal to one sale. For albums, the Stream Equivalent Album (SEA) system is used.

A single qualifies for gold certification if it exceeds 15,000 points and platinum certification if it exceeds 30,000 points. An album qualifies for gold certification if it exceeds 7500 points and platinum certification if it exceeds 15,000 points. wholesale sales to retailers. For music DVDs (formerly videos), a gold accreditation represents 2,500 copies shipped, with a platinum accreditation representing 5,000 units shipped.

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