
We use sales-based data to monitor average residential, commercial and industrial electricity costs — essentially total electricity sales divided by the quantity. . We monitor national residential electricity costs, using information about national electricity sales. This data: 1. is based on the actual volume of electricity sold and the. . The QSDEP is an average price series based on certain assumption, which complements the sales-based electricity cost data. The QSDEP indicator: 1. monitors tariffs. [pdf]
residential costs back to the year ended March 2009 have been revised based on consistent information provided by all electricity retailers. Some retailers have also provided revised data back to the year ended March 2002. This has been incorporated into the residential electricity cost data.
The Ministry monitors national residential electricity costs using information about national electricity sales (essentially total electricity sales divided by the quantity of electricity supplied in kWh). Residential cost data is derived from information obtained primarily from electricity retailers.
At the end of September 2023, Kiwis homes consumed, on average, about 7000kWh per year. This works out to cost roughly $197 per month, if the current average kilowatt (kWh) price is 33.74 cents.
The most recent stats show that, last year, the average Kiwi household used 7084kWh of electricity, at 34.25c per kWh, for a total cost of $2426. This works out to roughly $202 per month. Although most homes use more electricity over winter, and less in summer, due to heating costs.
A limited selection of publicly advertised retail tariffs are surveyed for around 40 towns and cities across New Zealand. Prices are surveyed as a snapshot at the mid-point of each quarter (15 February, 15 May, 15 August and 15 November each year).
The Ministry collects the total value of sales, the total volume of electricity sold, and the number of connections. The residential electricity cost per unit is derived by dividing the dollar value of residential electricity sales by the number of kilowatt-hours (kWh) sold to residential customers.
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