NZ power prices held steady in August 2026 - but are still up 7% on a year ago
After two sharp rises in a row, the quarter to August was quiet. 's , taken on 15 August 2026, puts the national average residential rate at 42.1 c/kWh, up from 42.0c in May. That is a rise of about 0.3%, roughly a tenth of a cent. In practice, prices held steady through the coldest part of winter.
Don't read that as relief, though. The year-on-year number is the one that matters: power is 7.0% dearer than it was in August 2025, when the average was 39.4c. Winter bills are high this year because we use more power in the cold, on top of a rate that climbed sharply in February and May. What didn't happen was a third rise in a row.
Why August is always the quiet quarter
This isn't a one-off. It's the same pattern every year, and it comes from how lines charges are set. The lines companies that run the local poles and wires, and Transpower, which runs the national grid, reset their prices once a year on 1 April. Retailers pass those increases through in April and May, so the May survey is where the jump shows up. August usually shows very little:
- May 2025: +10.1% in a single quarter. August 2025: +0.3%
- May 2026: +3.5%. August 2026: +0.3%
- August 2024: +0.7%, after a 3.3% rise in May 2024
The August 2026 survey backs this up directly. The lines component did not change in a single one of the 42 surveyed centres between May and August. It sits at 16.8c of the 42.1c national average, about 40% of the rate. All of the movement this quarter was on the energy-and-retail side, which crept up from 25.2c to 25.3c.
So a flat August doesn't mean the pressure has eased. It means the next network price reset hasn't happened yet. The Commerce Commission has approved rising lines revenue through to 2030, so the next step up will most likely appear in the May 2027 survey.
What it means in dollars
For a household on the NZ-typical 7,100 kWh a year:
- This quarter: 0.11c × 7,100 kWh = about $8 a year. Not worth losing sleep over.
- Over the last year: 2.76c × 7,100 kWh = about $196 a year, or $16 a month
- Over five years: from 31.2c in August 2021 to 42.1c now, up about 11c. That's about $780 a year, or $65 a month, more than the same household paid in 2021 for the same power
At 42.1c the average household bill works out to about $249 a month, or just under $3,000 a year, the same as in May. Heat a house with electricity, charge an EV or run a spa pool and a winter month will be well above that. The rate didn't do that. The kWh did.
Where prices actually fell
6 of the 42 centres got slightly cheaper this quarter and 36 got slightly dearer. None of the falls came from lines charges. They were all retail pricing: a cheaper plan becoming available, or an existing one being repriced.
- Balclutha: −1.52c/kWh, now 51.0c
- Richmond: −0.66c/kWh, now 38.8c
- Taupo: −0.58c/kWh, now 42.2c
- Nelson: −0.35c/kWh, now 38.4c
- Westport: −0.29c/kWh, now 47.0c
- Tauranga: −0.02c/kWh, now 45.0c
Balclutha's 1.5c drop is the largest movement anywhere in the survey. Its lines component stayed exactly where it was (25.6c, the highest in the country), and the energy component fell from 26.9c to 25.4c. It's a useful reminder that, even on the most expensive network in New Zealand, the retail part of the bill still moves, which is why it's worth re-running a Powerswitch comparison every few months rather than once.
Who has had the worst year
The one-year view shows who took the biggest hit:
- Dunedin: +9.5% on August 2025, now 42.5c/kWh
- Ashburton: +8.6% on August 2025, now 38.2c/kWh
- Christchurch: +8.2% on August 2025, now 38.6c/kWh
Dunedin stands out. Its lines component went from 14.0c to 16.8c over the year, and that one change accounts for about three-quarters of its 3.7c rise. Ashburton's lines charge explains a little over half of its increase, and Christchurch's a little under half. The rest came from retail pricing. At the other end, Westport rose least, just +2.8%. Its lines charge actually fell slightly over the year.
Every surveyed centre, August 2026
MBIE's blended rate for a low-user household on 22 kWh a day, cheapest first. "Quarter" is the change since May 2026 and "Year" is the change since August 2025.
| Centre | c/kWh | Quarter | Year |
|---|---|---|---|
| Wellington City | 37.2 | +0.19c | +6.9% |
| Ashburton | 38.2 | +0.10c | +8.6% |
| Nelson | 38.4 | −0.35c | +5.5% |
| Christchurch | 38.6 | +0.08c | +8.2% |
| Richmond | 38.8 | −0.66c | +4.7% |
| Invercargill | 39.0 | +0.20c | +6.5% |
| Hamilton | 39.8 | +0.02c | +6.3% |
| Auckland Central | 41.3 | +0.12c | +8.0% |
| Auckland North Shore | 41.3 | +0.13c | +7.3% |
| Napier | 41.4 | +0.21c | +6.7% |
| Taupo | 42.2 | −0.58c | +4.5% |
| Queenstown | 42.4 | +0.11c | +7.5% |
| Dunedin | 42.5 | +0.06c | +9.5% |
| Rotorua | 42.9 | +0.17c | +6.7% |
| Palmerston North | 43.1 | +0.35c | +7.9% |
| Timaru | 43.2 | +0.07c | +5.9% |
| New Plymouth | 43.5 | +0.43c | +8.0% |
| Cambridge | 43.7 | +0.13c | +5.7% |
| Whakatane | 44.0 | +0.80c | +6.4% |
| Whanganui | 44.0 | +0.23c | +7.8% |
| Winton | 44.2 | +0.19c | +6.7% |
| Thames | 44.2 | +0.16c | +7.3% |
| Whangarei | 44.5 | +0.16c | +5.5% |
| Paraparaumu | 44.7 | +0.25c | +8.0% |
| Oamaru | 44.7 | +0.06c | +6.8% |
| Tauranga | 45.0 | −0.02c | +6.1% |
| Kaiapoi | 45.1 | +0.09c | +2.9% |
| Rangiora | 45.5 | +0.09c | +2.9% |
| Pukekohe | 45.7 | +0.15c | +6.8% |
| Taumarunui | 46.0 | +0.05c | +7.3% |
| Otorohanga | 46.0 | +0.05c | +7.3% |
| Dannevirke | 46.4 | +0.19c | +6.4% |
| Westport | 47.0 | −0.29c | +2.8% |
| Blenheim | 47.1 | +0.12c | +5.6% |
| Masterton | 48.3 | +0.30c | +8.0% |
| Gisborne | 48.4 | +0.12c | +6.8% |
| Hawera | 48.4 | +0.53c | +7.6% |
| Greymouth | 48.5 | +0.24c | +6.8% |
| Waipukurau | 48.6 | +0.28c | +3.7% |
| Cromwell | 48.9 | +0.07c | +6.9% |
| Kerikeri | 50.6 | +0.06c | +4.3% |
| Balclutha | 51.0 | −1.52c | +4.2% |
The gap between the cheapest and dearest centre is 13.8c/kWh. On 7,100 kWh a year, a Balclutha household pays about $980 a year more than one in Wellington City for the same power. That gap is smaller than in May, but only because of Balclutha's retail fall. It's still almost all down to where the lines run.
A note on MBIE's revisions
Each survey can revise earlier quarters. This one adjusted a number of February 2026 figures by a few hundredths of a cent, and a handful by more: Waipukurau (+0.18c), Kerikeri (−0.15c) and Queenstown (+0.14c). The national February figure went from 40.60c to 40.61c. The calculator and every page on this site now use the revised series, so a February figure you saw here before may differ very slightly now.
What to do with a quiet quarter
A flat quarter is the best time to fix your plan, because you're comparing against prices that should hold until April. In order of payback:
- Re-check your plan and user type. The Powerswitch comparison takes a few minutes. The low fixed charge cap is being phased out, which has moved the break-even between and plans. See which tariff is cheaper in 2026.
- Switch if it's worth it. It's free and takes three to four days, and your power is never cut off. Here's how to switch power company.
- Move load to the cheap hours. Hot water, the dishwasher, laundry and EV charging all bill for less overnight on a time-of-use plan. See the cheapest time to use power.
- Finish winter efficiently. A heat pump delivers three to four times the heat per kWh of a plug-in heater, and the winter checklist ranks the rest by payback.
Work out your own number
The NZ Power Bill Calculator now uses these August 2026 MBIE rates for your town. Tick the appliances you actually run and it shows which few are driving the bill. For how the next survey compares, the next reading is taken on 15 November 2026.
Related guides
- The May 2026 update - the 3.5% jump this survey followed
- Power prices by region - every centre, sortable, with its full price history
- Average power bill in NZ, by region - monthly estimates for every centre
- Electricity price per kWh in NZ - what a unit costs and why it varies