How to Switch Power Providers in New Zealand

How to Switch Power Providers in New Zealand

Switching power providers is one of the few genuinely easy ways to cut a household bill. You do not need to call your old retailer, nobody turns anything off, and the whole thing is usually done online in a few minutes. What most people get wrong is not the switching — it is understanding what they are actually comparing.

Here is the fact that changes everything. Your power bill is really two bills stapled together: one from the company that owns the poles and wires in your street, and one from the retailer that buys the electricity and sends you the invoice. You only get to choose the second one. The lines charge comes with the address and is identical whoever bills you.

That is why your neighbour can pay a different price for the same network, and why a "bundle" deal can never discount the regulated part. Once you see the bill that way, comparing plans stops being guesswork.

How We Researched This Guide

We built this from the Electricity Authority's explanation of how a power bill is structured, MBIE's regulations on the low fixed charge phase-out, EECA's home energy guidance, and the Commerce Commission's electricity and telecommunications monitoring work. We also read the Electricity (Low Fixed Charge Tariff option for Domestic Consumers) Regulations 2004, which are set out in full on legislation.govt.nz, because the phase-out timetable is easy to misread from summaries alone.

Two things surprised us. First, retailers are not required to show the unit price of electricity on your bill, and some display rates excluding GST while others include it — so a 15 per cent gap between two figures can be a units difference, not a real one. Second, the maximum low fixed charge has been climbing by $0.30 every April, which quietly changes the maths for low-usage households each year.

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The Quick Summary (60-Second Version)

If you only read one part of this guide, read this.

• Your bill is a fixed daily charge in cents per day plus a variable charge in cents per kilowatt-hour. Everything else is a breakdown, a discount or GST.
• The lines component is set by the network company for your address and is the same no matter which retailer you pick. Only the retail portion is competitive.
• Low fixed charge plans trade a lower daily charge for a higher per-unit rate. The maximum low fixed charge rises every 1 April and the regulations disappear on 1 April 2027.
• Hot water on a controlled circuit is charged at a lower rate because the lines company can switch it off briefly at peak times.
• From 30 October 2026, bills must explain charges in clearer, more consistent plain language.
• The biggest reason people overpay is not hidden plans. It is that they never move.

Reading Your Bill Properly Before You Compare Anything

Grab your last bill and find the fixed daily charge and the variable rate. Those two numbers are the whole comparison. The daily charge is paid for every day the property is connected, whether or not you use any power — which is why an empty holiday house still gets a bill. It covers meter rental, reading, billing and account overheads, and usually a fixed network fee as well.

The variable charge covers the electricity you actually use, plus a variable network fee in most cases. A kilowatt-hour is just a unit: a 1,000-watt heater running for one hour uses one. If your hot water sits on a controlled circuit, you will see the anytime rate and the controlled rate listed separately, because that circuit can be briefly switched off at peak times in exchange for a cheaper rate.

The Units Trap

Here is where people go wrong. Electricity retailers are not required to present the unit price on bills. Some show rates excluding GST, others include it, and the treatment of the Electricity Authority levy varies too. Separately, the Electricity Authority publishes some network figures GST-exclusive while retail bills are normally GST-inclusive. A 15 per cent apparent difference can be nothing more than a units difference.

So when you compare your bill against anything published, check whether GST is in or out first. It is the single most common source of false conclusions in this whole exercise.

Low Fixed Charge, and Why the Maths Keeps Moving

The Electricity (Low Fixed Charge Tariff option for Domestic Consumers) Regulations 2004 once required retailers to offer a low fixed charge option capped at $0.30 a day, excluding GST but after any prompt payment discount. The government is phasing that out over five years from 1 April 2022, lifting the maximum by $0.30 each April until it roughly matches the standard fixed charge.

Throughout the phase-out, retailers must still offer low fixed charge options. Households using under 8,000 kWh a year — or 9,000 kWh in the lower South Island, meaning Christchurch and below but excluding the West Coast — must pay less on a low fixed charge option than on any corresponding alternative. Distribution companies must offer their own low fixed charge options at a maximum of 50 per cent of the new maximum each year. The Electricity Authority monitors and enforces all of it.

What this means practically: a low user has historically been better off on a low fixed charge plan, trading a lower daily charge for a higher per-unit rate. As the maximum daily charge climbs each April, that trade-off shifts. If you have been on a low user plan for years without checking, the assumption underneath it may no longer hold. After 1 April 2027, no retailer will be required to offer one at all.

Comparing Plans Without Getting Fooled

Start with your annual usage in kilowatt-hours, your ICP number, and your current fixed and variable rates. Then estimate total annual cost, not headline rates. A low usage rate paired with a high daily charge can cost more than the reverse, depending on how much you actually use.

Use an independent comparison service rather than a single retailer's website, and check the contract term. Some plans lock you in, others are month to month. Prompt payment discounts are common but only apply if you consistently pay on time — if you sometimes do not, treat the discount as absent when you compare, because that is what you will actually pay.

Where the Savings Actually Come From

Only the retail margin and the second service's overhead can be discounted in a bundle. The network component cannot, because it is the same whoever bills you. That is worth remembering when a bundled power-and-broadband offer looks generous.

The Commerce Commission's monitoring found only 5 per cent of mobile consumers changed providers in the year reported, down from 6 per cent, and residential broadband switching fell from 12 per cent to 10 per cent. The Commission calls this persistent inertia, and notes that more choice alone has not produced more competitive pressure. Pricing is the lowest-rated area of satisfaction across both markets.

Questions You Might Have

Will my power be cut off during the switch?

No. The change is administrative — your supply stays exactly as it is, and only the billing relationship moves. Your new retailer notifies the lines company so the network charges are redirected. You do not need to contact your old provider at all; the new one handles the transfer.

How long does a switch take?

Most transfers complete within a handful of business days, and some retailers offer faster turnarounds if you sign up online. You will get a confirmation from the new provider once it is done. Nothing about your physical connection changes during the process.

Can I switch if I owe my current provider money?

Yes, but the debt does not disappear. You still owe the outstanding balance to the old retailer and will need to pay it. Your new provider is not taking over that debt, and unpaid balances can follow you if you try to return later.

Do I need to tell my landlord?

Not usually, but check your tenancy agreement. Switching retailers is your right as a tenant, and some landlords require the power account to stay in your name. If power is included in your rent, the decision is not yours to make.

Should I re-check my plan every year?

Yes. The low fixed charge maximum rises every April, which changes the maths for low-usage households, and plans get retired and replaced regularly. A reader who reviews their plan once a year is already doing the thing the regulator says most people fail to do.

What Matters Most

The reason people overpay for power is not that better plans are hidden. It is that they never move. The Commerce Commission's own figures show switching rates falling in both mobile and broadband, and describes the result as persistent inertia — consumers staying on plans that do not suit their usage and spend.

So the useful habit is not a one-off switch. It is an annual check: read your bill, find the fixed and variable lines, confirm whether you are a low user, and compare total annual cost including GST on a consistent basis. Fifteen minutes, once a year.

And remember the structural point that makes all of this simpler. The poles and wires cost the same whoever sends the invoice. Everything you can actually change sits in the retail portion — which is exactly where you should be looking.