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.