About Powerswitch

About Powerswitch

What is Powerswitch?

Powerswitch is a free service that helps you work out which power company and pricing plan is best for you. Using our comprehensive database of electricity and gas prices, it's easy to compare plans and find the cheapest deal in your area.

How is it funded?

Consumer Powerswitch is supported by:

  • Consumer NZ
  • Electricity Authority
  • Gas Industry Company
  • Contact Energy
  • Ecotricity
  • Electra Energy
  • Electric Kiwi
  • Energy Online
  • Flick Electric Co.
  • Genesis Energy
  • Mercury
  • Meridian Energy
  • Nova Energy
  • Powershop
  • Pulse Energy
  • Trustpower

Using Powerswitch

What can I use it for?

Powerswitch is designed to provide comparisons for primary residences and not businesses or baches. If you are using Powerswitch to compare plans for a non-primary residence, it's possible that some listed plans won't be available to you.

Powerswitch does not cover apartments as the separate agreements landlords or development companies may arrange preclude us from being able to give meaningful comparisons.

We advise consumers who want to switch to:

  • Check your tenancy or electricity supply agreement allows you to switch retailers
  • Contact retailers directly.

Important: before signing a rental agreement or buying an apartment, check you have a choice of power companies available to you. Check your tenancy or electricity supply agreement allows you to switch retailers. Otherwise you could be locked into a contract and have to pay whatever your building's electricity supplier (and any middle-man company) charges.

How do you estimate my energy?

We take the information you provide about your pattern of electricity and gas use, and information from your bill (if you provide it), and estimate how much energy you will use in a year.

Using this estimate, we compare the different pricing plans available to you and identify the cheapest. Results also include prompt and electronic payment discounts.

Why is my ICP not appearing?

We may be unable to match your address to one specific ICP. Details of your ICP can be found on the Electricity Authority website. Your ICP should also appear at the top of your bill. Or at the top of any email usage updates from your supplier.

If you believe changes are needed please contact your electricity retailer to get this updated.

General assumptions

For electricity we take the information you supply and work out which parts are for general power, hot water and heating. For gas the uses are cooking, hot water and heating. We adjust these proportions for where you live, your type of hot water system and how you heat your home in winter. We also take into account the time of year covered in the information you give us - a bill for December is unlikely to include any power used for heating.

Household energy-use assumptions

In working out the amount of power each household uses we make the following assumptions:

  • The amount of energy used in the period you supplied us with is typical of your average level of use.
  • Winter months, when heating is used, are from April to September – except for the far north where the period is slightly shorter, and the central North Island and the deep south of the South Island where the period is longer.
  • If you don’t have your bill we make an estimate of how much energy you use, based on what a typical household of the same size as yours would use. These amounts are then adjusted according to what you tell us about where you live and how your household uses energy.
  • A house unoccupied during the day uses less energy for heating than one occupied all day.
  • We adjust the energy you use for water heating depending on the different methods of water heating you use. If you have a continuous supply system there is no standing loss like there is from a conventional cylinder, a hot water heat pump is assumed to be twice as efficient as a cylinder, and solar heating gives large savings in summer but also some savings in winter. A wetback reduces your winter use, but only if you use the fire as your main source of heating. We also take into account that households use more hot water in winter than in summer.
  • We ask for your main way of heating your home and also up to two other types of heating you regularly use. We allocate the majority of your heating energy needs to the main source and the balance is split evenly between other sources.
  • If you have a heat pump, we reduce the amount of electricity used for heating.
  • Where you live matters. We use the average monthly temperature of different regions to adjust the amount of energy needed for heating.

Other assumptions

In calculating the cost of electricity we make the following assumptions:

  • We split the electricity used into 3 groups: general usage – lighting, cooking, appliances; hot water heating; and space heating. We apply the appropriate rate of each pricing plan to each group.
  • If a plan has day/night rates, 72 percent of the power is at the day rate and 28 percent at the night rate. Where the night rate covers the weekend, the split between day and night is 51/49.
  • If a plan has summer/winter rates, the power is split between the rates and is also varied for different types of electricity use. The period for winter rates is May to September. This is one month shorter than the usual heating period of April to September and so a proportion of electricity use for heating is allocated to the summer rate.
  • We have excluded any rebates from community-owned trusts, line companies, or any dividends paid by Contact Energy to its shareholders except for Mainpower (North Canterbury) which is an exception, because the rebate is deducted by retailers from the tariffs they charge customers.

My plan/retailer isn’t listed

We work closely with retailers to ensure we have a complete list of available plans on Powerswitch. If your plan is not listed please let us know.

However, all retailers from time to time make special offers to selected customers during marketing campaigns. Some companies also have a range of plans that are only available to existing customers who meet specific eligibility criteria. As these plans are not open to the general public, but only to customers to whom the company offers them, they are not represented on Powerswitch.

There are also some companies that are not listed on Powerswitch:

  • Bosco Connect is not included as it only provides electricity to a limited number of apartment buildings.
  • Grey Power Electricity is not included because the pricing is only available to those people Pulse Energy offer it to, so not all Powerswitch users would be eligible to receive the offer.

Why are there no gas or dual-fuel options for the South Island?

Reticulated natural gas is distributed in the North Island only. Almost all the gas in the South Island is bottled. The Powerswitch calculations only include reticulated gas.

Comparing bottled LPG prices

Powerswitch can be used to compare prices for electricity and natural gas; calculations for bottled LPG are not available. But you can select bottled LPG as an answer to the heating question. This will exclude the LPG part and give you a representative electricity comparison.

Bill information we need

All the information we need to know is on your bill:

  • The start and finish dates for the time your bill covers
  • The amount of power you have used

If you're on a plan with more than one meter you'll need to enter the amount for each meter separately. In some cases we will ask you about a meter that doesn't seem to appear on your power bill. You should put "0" in the box (this is because with some companies, if you haven't used any power they don't print the details on your bill).

If you wish you can add together the amounts from successive power bills and enter that information. Just ensure that you get the start date from the first bill, the finish date from the last bill, and that you don't have any bills missing in between.

How do you determine which plan type to show in my results?

The type of plan displayed in your results is normally determined by the plan you select as your current one (e.g. selecting a controlled plan means your results will also show controlled plans).

If you don’t select a current plan, the plan type is based on your profile — specifically, whether or not you’ve selected electric hot water cylinder and/or a night store heater. We then display the most common plan in your region for households that match the rest of your profile. Note the most common plan type varies from region to region.

What does the Powerswitch estimate include?

Powerswitch comparisons include GST, Electricity Authority levies, daily charges, unit charges, plus prompt payment and dual-fuel discounts (it's important to note that some retailers provide their customers with rates exclusive of GST and levies). There are discounts and fixed-term prices that are not publicly available so do not appear on Powerswitch.

Low fixed charges

Electricity providers are required to assist low-use customers by offering them a low fixed charge tariff option of no more than 30¢ per day (excluding GST but after any prompt payment discount is subtracted). Your provider should inform you at least annually of whether it may be beneficial for you to switch to a low fixed charge rate.

The low-user plan is generally the best option if you use less than 8000kWh per year, or 9000kWh per year if you live in parts of the lower south region (all areas south of and including Christchurch, but excluding the West Coast).

The low-user plans have a lower fixed daily charge than the standard options and a higher variable charge for the electricity used. The amount of the variable rate varies depending on where you live and what type of meter you have. To qualify for a low-user plan, your home must be:

  • Used or intended for occupation mainly as a place of residence.
  • Your principal place of residence. Certain very small distributor locations are exempt from these requirements.

Switching process

How long does it take to switch?

On average, it takes just 3 - 4 days to switch retailers. Your switch is not confirmed until you have entered into an agreement with your new supplier.

Does the power get turned off when I switch?

In most cases there is no interruption to power supply when people switch. The only exception is if a change of meter is required. In this situation your new retailer may need to switch off the power for a few minutes when they install the meter. Discuss this with the retailer you are switching to, so that you know exactly what to expect.

Will it cost me anything to switch?

It normally costs nothing to switch. However, check with both your existing and new retailer whether there are any associated costs. For example, with your existing retailer there may be fees for disconnection, breaking a fixed-term contract, or organising a special meter read. Ask your new retailer if it requires a bond.

How can I be sure I do not switch to a retailer that is just about to raise prices?

There are no guarantees, although some retailers offer fixed-price contracts to provide price surety. If your new retailer does increase its prices once you've switched, you can always choose to switch again if you have not signed a fixed-term contract.

Does someone need to visit my home before I can switch?

Not usually, but some retailers may wish to check the meter before a switch takes place.

Will I need new equipment, such as wires or a new meter?

In most cases, no. The new retailer will use the same network of power lines to deliver electricity to your house. But if you switch to a different type of plan, your meter may need to be modified. Or if you already have a smart meter installed, check to see if the new retailer can read your smart meter.

Problems with retailers

My bill hasn’t arrived

Although you are obliged to pay your bills, it is up to the power company to ensure it sends you bills within a reasonable timeframe. If you can't afford to pay all at once, tell the power company you will pay by instalment. You should receive a discount from the company when bills are very late.

My estimate is too high

Although power companies bill their customers monthly, they usually only send someone around to read the meter every second month. In each intervening month they send you an estimated account, based on your consumption over the previous years.

If you have good reason to think the estimated account is too high, make a payment to the company for what you think is fair, together with an explanation. If you know how, you could read the meter yourself.

If your estimated accounts remain persistently inaccurate, complain. There may be a bug in the system.

Complaining about a retailer

Utilities Disputes (formerly known as The Office of the Electricity and Gas Complaints Commissioner) is a free service that deals with complaints from consumers about electricity and gas retailers and distributors. Before it will consider your complaint, you must complain to the company concerned first. If your complaint is still not resolved, you can ask Utilities Disputes to consider your complaint.

To make sure there is no confusion about the nature of your complaint, we suggest you write to the company and head up your letter "formal complaint". The company generally has 20 working days to try to resolve your complaint.

You can ask Utilities Disputes to consider your complaint if:

  • You and the company have not resolved the complaint within 20 working days, and the company has not written to you with good reasons why it will take more time
  • You and the company have not resolved the complaint after 40 working days.

Spot pricing

What is a spot price?

A spot price is the price retailers pay when they buy electricity from the wholesale market.

Spot prices change every half-hour and can vary quite dramatically depending on supply and demand. Typically spot prices are higher during winter, and weekdays at breakfast and dinner time.

Some retailers now offer pricing plans based on spot prices. There are risks and benefits associated with this pricing model.

What does buying power at the spot price mean?

Most electricity retailers charge customers a flat rate. This means you pay the same rate for the electricity you use regardless when you use it, and regardless of the spot price your retailer paid. Residential customers can instead sign-up to a retailer that offers a spot price contract. This means what you pay for your electricity will vary depending on the spot prices.

Spot prices change every half-hour, so you would be charged a range of rates.

Buying power at the spot price has advantages. When spot prices are low, it may mean you pay substantially less for electricity than you would on a traditional retail contract where the price is the same all the time.

But, the same is true in reverse. If spot prices increase above the flat rates charged by retailers, you may pay substantially more than you would on a traditional retail contract.

Typically retailers will add a premium to your prices, to cover the risks associated with managing changing spot prices. So, because you are accepting the risk yourself, you won’t pay this premium.

What do I need to consider?

If you are considering a spot price contract you should think about whether you can:

  • budget for electricity bills that vary month-to-month and will sometimes be higher than a traditional retail contract

  • use less power at times when the spot price is generally higher (for example, by switching to alternative heating fuels like wood or gas)

  • temporarily reduce your power usage in response to particularly high prices by either:

    • using less power (for example, by having shorter showers)

    • shifting some power usage from higher-priced to lower-priced periods (for example, using a dishwasher, washing machine or dryer at off-peak times)

It may also be useful for you to:

  • actively monitor your power usage (if you have a smart meter, retailers often provide online tools or mobile apps to help you do this)

  • actively monitor spot prices (ask your retailer if they can provide online tools or mobile apps to help you do this). The WITS (Wholesale Information Trading System) website allows you to monitor current and forecast electricity spot prices throughout the country.

If you choose to take up a spot price contract but find it does not work for you, or you want to return to a conventional contract when spot prices are high, you may find that other retailers wish to impose conditions on contracts (for example, a fixed term agreement) if you want to switch to them.


How many retailers are there?

Depending on where you live in New Zealand, you should have between eight and 25 retailers to choose from, each with their own pricing and service offers.

How does switching help competition?

There are around 1.7 million households in New Zealand. The more households that shop around for electricity on a regular basis, the more pressure there is on electricity retailers to ensure their offer is competitive.

Will I still receive network rebates if I switch retailers?

In all but one case, the rebate will in no way be affected if consumers make the decision to switch electricity retailers. Any savings made by the consumer will be over and above the annual rebate they are entitled to. The exception is for consumers who are with Trustpower and who live in Tauranga City or Western Bay of Plenty District, who will lose their rebate if they switch away. For more information on network rebates, visit ea.govt.nz.

If I move to a new address, can the same retailer provide me with electricity?

That depends on where you move to, as many retailers only operate in certain regions. If you are moving within the same town or city, it is highly likely you can stay with the same retailer. Contact your retailer to find out.

I pay my power bill by direct debit. What happens if I switch retailer?

If you pay your power bill by direct debit and wish to switch retailers, you will need to cancel your direct debit by either calling, emailing or writing to the retailer you are leaving and your bank. Note: this should be done after your final bill has been paid, unless you wish to pay your final bill by a different method. If you wish to pay by direct debit with your new retailer a new direct debit form will need to be completed.

What's My Number calculator

How is my electricity-only estimated savings number calculated?

The estimated savings figure is the difference between your current retailer and the cheapest retailer available in your area. The calculation assumes that you are currently on the cheapest electricity plan for your retailer.

If your current retailer has the cheapest plan in your area, then the estimated savings figure is the difference between your retailer's cheapest plan and your retailer's most expensive plan. Comparisons are always made between plans of the same type, e.g. low user plans will be compared with low user plans and standard user plans with standard user plans. Where a retailer offers one plan option per plan type only, no further comparisons will be made.

The number is an estimated annual savings figure. To get a more accurate idea of your potential savings on both gas and electricity, and the best options for providers in your area, compare plans with Consumer Powerswitch.

How is my dual-fuel estimated savings number calculated?

The estimated savings figure is the difference between your current electricity and gas retailer(s) and the cheapest electricity and gas retailer(s) available in your area. The calculation assumes that you are currently on the cheapest electricity and gas plan for your retailer(s).

The number is an estimated annual savings figure. To get a more accurate idea of your potential savings on both gas and electricity, and the best options for providers in your area, compare plans with Consumer Powerswitch.

Please note that some retailers in certain areas offer electricity or gas as a dual-fuel deal only. A dual-fuel deal is where you must have both your electricity and gas provided by the same supplier. For example, in central Wellington, customers cannot sign up for electricity with Nova Energy unless they also have their gas supplied by Nova Energy.

This means customers in central Wellington can’t be on a Nova Energy electricity plan and a Genesis Energy gas plan. If customers choose a combination of retailers that is not possible (like the previous example) then a $0 number is returned.


Aren't all retailers essentially the same?

The prices charged vary significantly between retailers with the average household able to save around $207 per year by switching to the cheapest retailer in the area.

Do I have to sign an agreement with my new supplier?

Each retailer has its own terms of supply that they require their customers to agree to. A link to these can be found on the retailer page.

Does a retailer have to accept me as a customer?

No, a retailer does not have to accept new customers. It is entirely up to the retailer. However, if a retailer has started the formal switching process to accept you as a customer they cannot withdraw the switch because they have changed their mind.

Is Trustpower's rebate included in the calculation?

No, these payments are not included in our calculations so there may be additional benefits of being a Trustpower customer. Only Trustpower customers in Tauranga City and Western Bay of Plenty District are beneficiaries of the Tauranga Electricity Consumer Trust (TECT). As a major shareholder in Trustpower, TECT receives dividends from Trustpower and distributes a proportion of those dividends back to customers.

What are the terms and conditions for retailers?

Here you can find out more about the engagement between retailers and Consumer NZ on the Powerswitch website. View the Terms and Conditions for listing pricing plans on the Powerswitch website.

Smart meters

What is a smart meter and how much will it cost

A smart meter is an electronic meter that can record more regular and accurate electricity consumption information and has two-way remote communication capability. The rollout of smart meters is currently at no extra cost to consumers unless additional work is required, for example, if work is needed at your meter box or switchboard to make it safe. For more information on smart meters see the Electricity Authority website.

Do I have to have a smart meter at my house?

In contracts with consumers, retailers almost always reserve the right to replace meters at their discretion. This means that refusing to allow the installation of a smart meter may be a breach of your electricity contract. You may be able to switch to a retailer that is not using smart meters or has less restrictive contract terms. Contact your retailer to check what its meter requirements are..