The 40-second answer
To compare electricity prices in New Zealand, ignore the headline c/kWh rate and compare total annual cost instead. Find your yearly usage in kWh from your bill, note both your daily fixed charge ($/day) and unit rate (c/kWh), decide if you are a low user (under 8,000 kWh/year) or a standard user, then for each plan work out daily charge × 365 + your kWh × the unit rate. Rank plans by that yearly total. Households that compare and switch typically save $300 to $400 a year.
Uses indicative regional rates (incl. GST). Every figure also appears in the tables below, so the page works without JavaScript. National-average benchmark: 34.40 c/kWh, live data.
Key takeaways
- Compare total annual cost, not the c/kWh rate. A low unit rate with a high daily charge can cost more than the opposite mix.
- You need three numbers from your bill: annual kWh, daily fixed charge ($/day), and unit rate (c/kWh).
- Match the plan to your usage: low user under 8,000 kWh/year (9,000 in the lower South Island), standard above. The break-even has fallen to ~7,000 kWh as the low-user cap rose to $1.80/day.
- Switching is free, takes 3–4 days, and never cuts your power. Typical saving: $300–$400/year.
Why most price comparisons get it wrong
Open any "cheapest power" listicle and you will see plans ranked by their unit rate, the c/kWh number. That number is half the story. Every New Zealand electricity plan charges you two prices at once: a daily fixed charge you pay no matter what, and a variable rate for each unit of power you actually use. Rank by the unit rate alone and you will routinely pick a plan that costs you more.
Here is the trap in numbers. A standard-user plan in Auckland might quote 27 c/kWh, while a low-user plan quotes 32 c/kWh. The low-user plan looks dearer. But the standard plan also carries a $2.40/day fixed charge versus the low-user plan's $1.80/day. For a small flat using 4,000 kWh a year, the low-user plan wins by over $130 a year, despite its "worse" rate. The only way to know is to add both prices together for your usage. That is the entire method, and the rest of this guide is how to do it in fifteen minutes.
The 5-step method to compare power plans
Follow these in order. Steps 1–3 take your own bill; steps 4–5 do the comparison.
Find your annual usage in kWh
Read it off your bill or online account. No history? Use the NZ average of ~7,100 kWh, or a home-size estimate from the table below.
Write down your two prices
Your daily fixed charge ($/day) and your unit rate (c/kWh), both on your bill. A controlled or day/night meter shows more than one unit rate.
Low user or standard user?
Under 8,000 kWh/year (9,000 in the lower South Island) you can pick a low-user plan with a capped daily charge. Above that, standard is usually cheaper. Near 7,000 kWh, compare both.
Add both prices for each plan
For every plan: daily charge × 365 + your kWh × unit rate = total annual cost. Rank by that yearly total. This is the number that matters.
Compare retailers and switch
Compare every NZ retailer for your address in our directory, pick the cheapest that suits you, and switch — it is free and takes 3–4 days.
How the NZ power market actually sets your price
Your retailer sends the bill, but it controls only a slice of what you pay. The price is built up a long chain, from the generators at the top of the country to the meter on your wall. Knowing the split tells you which parts you can change by switching, and which you cannot.
| Component | Share of bill | Can switching change it? |
|---|---|---|
| Generation (making the power) | ~38.5% | Indirectly, via your plan |
| Distribution (local lines) | ~24.5% | No, fixed by your region |
| Retail (billing, service, margin) | ~11% | Yes |
| Transmission (national grid) | ~8% | No |
| Metering | ~4.5% | Rarely |
| GST (15%) | ~13% | No |
| Market levies | ~0.5% | No |
The lesson hides in the right-hand column. Around a third of your bill is lines and network charges set by your regional monopoly (Vector in Auckland, Orion in Christchurch, Aurora in Otago) and regulated by the Commerce Commission. You cannot shop those away. What you can change is the retail layer and, crucially, which plan structure you sit on. That is why two homes on the same street, same lines company, can pay hundreds of dollars apart. For the full anatomy, see our electricity prices in NZ breakdown.
The gentailer model, and why loyalty rarely pays
Four big companies, Contact, Genesis, Mercury and Meridian, both generate electricity and sell it to households. They are called gentailers. Because they own the supply, they can offer stable pricing, but they have little reason to give long-standing customers their sharpest rate. The sharpest rates usually come from independent retailers, such as Electric Kiwi, Flick, Frank, Octopus and Powershop, that buy on the wholesale market and compete hard on price and features. The practical upshot: the longer you have been with any retailer without checking, the more likely you are overpaying. Loyalty is not rewarded in this market; comparing is.
Indicative rates by region (the numbers behind the calculator)
These are planning estimates, incl. GST, used by the calculator above. They are starting points, not a quote: your retailer prices your exact address, network and meter. Use them to sanity-check a quote, not to sign on.
| Region | Lines company | Standard: daily / unit | Low user: daily / unit |
|---|---|---|---|
| Auckland | Vector | $2.40/day · 27.0c | $1.80/day · 32.0c |
| Hamilton / Waikato | WEL Networks | $2.50/day · 27.5c | $1.80/day · 32.5c |
| Tauranga / Bay of Plenty | Powerco | $2.60/day · 28.0c | $1.80/day · 33.0c |
| Wellington | Wellington Electricity | $2.70/day · 28.0c | $1.80/day · 33.0c |
| Hawke's Bay | Unison | $2.70/day · 28.5c | $1.80/day · 33.5c |
| Christchurch | Orion | $2.20/day · 25.0c | $1.80/day · 30.0c |
| Dunedin / Queenstown | Aurora Energy | $2.80/day · 29.0c | $1.80/day · 34.0c |
| Northland | Top Energy / Northpower | $3.00/day · 30.0c | $1.80/day · 35.0c |
Estimated annual cost by home size (Auckland example)
To show how usage flips the answer, here is the total annual cost of each plan type for four home sizes on Auckland (Vector) rates. The cheaper option in each row is in bold.
| Home | Annual kWh | Low-user cost/yr | Standard cost/yr | Cheaper |
|---|---|---|---|---|
| 1 person / flat | 4,000 | $1,937 ✓ | $1,956 | Low user |
| 2 people | 6,000 | $2,577 | $2,496 ✓ | Standard |
| 3–4 people | 8,000 | $3,217 | $3,036 ✓ | Standard |
| 5+ / large home | 11,000 | $4,177 | $3,846 ✓ | Standard |
Notice the cross-over: small homes save on low user, larger homes on standard. The line moves around 7,000–8,000 kWh. This is exactly why a single "cheapest plan" answer does not exist, and why you must use your own kWh. Our low user vs standard user guide works through the break-even maths in detail.
Fixed-rate vs time-of-use: a second decision
Once you have picked low or standard user, there is a second fork. Most plans charge the same unit rate around the clock (an anytime rate). A growing number charge by time of use: cheaper overnight and at off-peak times, dearer during the early-evening peak. Some, like Electric Kiwi's Hour of Power, even give a free hour a day.
Anytime (fixed) rate
One unit rate all day. Simplest to compare and best if your usage is spread evenly or you cannot shift it. Most households are still better off here.
Time-of-use rate
Cheap off-peak and overnight, expensive 5–9pm peak. Wins if you can run the dishwasher, washing, hot water or EV charging late at night or midday.
The honest rule: time-of-use only beats a flat rate if you will actually move load out of the evening peak. If you have an EV or a battery, it is usually a clear win, see our top EV electricity plans. If you cannot shift much, a low anytime rate is safer. To map each retailer's off-peak and free windows, read off-peak power times and free hours in NZ.
Comparing properly: the maths, then the directory
There are two halves to a good comparison. Do the maths yourself for one or two plans, so you understand why a plan wins, then check the full market for your address so you do not miss a cheaper option. Both matter: the maths stops you being fooled by a low headline rate, and the directory makes sure you have seen every retailer that serves your street.
How to do it
- Work the numbers on your current plan and one rival using daily charge × 365 + kWh × rate, so you can see exactly where the money goes;
- Compare the full market for your address in our NZ retailer directory, which lists the gentailers and the independents side by side;
- Confirm the winner's two prices match what you expect for your usage and meter type before you sign.
The less-obvious truth: there is no "cheapest power company"
People search for "the cheapest power company in NZ" expecting a name. There isn't one, and any article that gives you a single name is guessing. Here is why, from inside the market.
New Zealand retailers do not publish one national price. They quote per address, per network and per meter configuration, because their own cost, the lines charge, changes street by street. We confirmed this directly: the structured price data feeds for NZ return prose like "unit rates around $0.26–$0.32/kWh and daily charges around $1.72–$2.93/day, confirmed in your quote", not a fixed number. That is not retailers being cagey; it is genuinely how the cost stacks up. So the retailer that is cheapest in Vector territory (Auckland) can be mid-pack in Orion territory (Christchurch), and a low-user champion can be a poor pick for a five-bedroom home.
This flips the usual advice. Stop hunting for the "best retailer". Instead, find the cheapest plan for your address and your kWh, recheck it once a year, and treat switching as routine maintenance rather than a one-off hunt. The households that save the most are not the ones who found a magic company; they are the ones who compare every year and switch without sentiment.
The Selectra expert's take
Cornelia Zavoianu, energy market analyst
"The single biggest mistake I see is comparing the unit rate and stopping there. Your bill is two prices. Until you add the daily charge across a full year, you are not comparing plans, you are comparing one ingredient of them."
"Watch the calendar, too. The low-user daily charge cap rose to $1.80/day and the regulation is removed entirely on 1 April 2027 (MBIE / Electricity Authority). That is quietly pushing the low-vs-standard break-even down towards 7,000 kWh and, from 2027, will reshape every plan. If you compared more than a year ago, your old conclusion may already be wrong."
This suits you if you are willing to spend fifteen minutes a year with your bill and our retailer directory. It becomes a risk when you sign a fixed-term or bundled deal without checking the exit terms. Prices are address-specific, so treat any figure here as indicative and confirm yours with the retailer."
What to do this week
- Pull your last 12 months of kWh and your current daily charge and unit rate from your online account or a recent bill;
- Run them through the calculator above to see whether low or standard user fits, then compare the full market for your address in our retailer directory;
- If your usage is heavy in the evening, model a time-of-use plan too; if you have an EV, check a dedicated EV night plan;
- Before signing, confirm there is no fixed term or break fee, then follow our step-by-step switch guide;
- Diarise a 15-minute recheck for next year, when new daily charges take effect.
Frequently asked questions
There is no single cheapest power company in New Zealand, because prices are quoted per address, network and meter. The cheapest retailer in Auckland may be among the dearest in Dunedin. The honest answer: the cheapest plan is the one whose total annual cost (daily charge × 365 + your kWh × the unit rate) is lowest for your usage. Compare every retailer for your address in our NZ retailer directory. Low-cost independents such as Electric Kiwi, Flick, Frank and Octopus often top the list for low-to-average users, but always check against your own numbers.
Compare total annual cost, not the headline c/kWh rate. Four steps: (1) find your annual usage in kWh from your bill or online account; (2) note your daily fixed charge and unit rate; (3) decide whether you are a low user (under 8,000 kWh/year, or 9,000 in the lower South Island) or a standard user; (4) for each plan work out daily charge × 365 + your kWh × the unit rate, and rank by that yearly total. A low daily charge plan with a high unit rate can still beat a "cheap" unit rate with a high daily charge, depending on how much you use.
The average New Zealand household pays an all-in effective rate of about 34.40 c/kWh (incl. GST) once the daily charge is spread across usage. Pure unit (variable) rates on standard-user plans typically sit between 25 and 30 c/kWh, with low-user plans around 30 to 35 c/kWh to offset their capped daily charge. A "good" deal is one whose total annual cost for your usage lands below your region's average, not simply one with a low unit rate. Always read the unit rate and the daily charge together.
Households that compare and move to the best plan for their usage typically save $300 to $400 a year, and sometimes more if they have sat on the same plan for years. The saving comes from two levers: picking the right plan type (low vs standard user) and moving off an old, dearer rate. Switching is free, takes 3 to 4 days, and never disconnects your power. Compare retailers for your address in our NZ retailer directory.
Three reasons. First, plan type: one home may be on a low-user plan, the other on standard user, with different daily charges and unit rates. Second, meter configuration: a home with a controlled hot-water circuit or a time-of-use smart meter is billed on different rates than a single anytime meter. Third, retailer and tenure: a household that signed years ago and never compared is often on an older, dearer plan than a neighbour who switched recently. Same lines company, same suburb, very different bills.
