The average power bill in New Zealand

People ask for the average power bill because they want to know whether theirs is normal. It is a fair question with an awkward answer: the thing that varies most between households is not the price of electricity, it is how much of it they use. Two houses on the same street with the same retailer and the same rates can be a hundred dollars a month apart.

So the useful version of the question is: what is the average price, and what is my own usage?

The published price

MBIE runs the Quarterly Survey of Domestic Electricity Prices. It prices a defined model household (8,000 kWh a year, low-user plan, controlled hot water, prompt-payment discounts taken) against publicly advertised tariffs, in 42 towns and cities, four times a year.

As at May 2026 the national average was 42.04c per kWh including GST. For that model household, that is about $3,363 a year.

The national figure is weighted by market share rather than being the mean of the towns, so it is not simply the middle of the list. And the spread underneath it is wide: Wellington City at 37.01c against Balclutha at 52.52c.

Turning that into your number

1. Find your annual kWh. It is on your bill, usually as a 12-month total or a monthly graph. Add up twelve months if you have to.
2. Multiply by your town's price, not the national one. We publish a page per surveyed town with its current price and its 20-plus years of history.
3. Divide by twelve for a monthly average, and then expect the real bills to sit well above it in winter and well below in summer.

That gives you a fair expectation. If your actual bills sit a long way above it, the gap is usually usage, not price.

Why "average" hides the two things that matter

Season. Power use in New Zealand is strongly seasonal because most of the extra load is heating. A household whose annual average is fine can still get a July bill that looks alarming. That is normal and it is not a billing error.

Household size and what it heats with. Hot water is typically the single largest electrical load in a New Zealand home, and space heating is the one that swings. A house with a heat pump, a well-insulated cylinder and gas cooking is on a completely different curve to an all-electric house with an old cylinder.

Neither of those is a reason not to compare plans. They are a reason not to read too much into a single monthly figure.

What we can and cannot tell you

We publish MBIE's survey data by town, including the split between lines charges and everything else, because that data is public, current and genuinely useful for working out whether an address is expensive.

We do not publish plan prices, because we do not have verified rate files from the retailers yet, and an estimate dressed up as a quote is worse than no number. When we have them, they will be dated and sourced like everything else here. Until then, we can show you what the 8 power companies we compare offer at your address, and you can get the price direct from them.