Annual Price Plan review

To make sure you're on the most cost effective price plan, we check your energy usage every 12 months (as long as you're not on a fixed term plan). If we've got a better price plan for your needs, we'll automatically change it for you. It's all part of our commitment to great service. 

Think your usage might increase or decrease due to a change of appliances, or a change in who's living at home? Get in touch and we can talk to you about pricing and plan options.

What's in an electricity bill?

Energy 46%

The cost of generating and providing the electricity you use. Mercury works out this part of your bill.

Transmission 10%

The cost of moving electricity over Transpower's National Grid between power stations and local lines. Your lines company tells us the cost.

GST 13%*

Just like buying groceries, GST applies to all parts of your bill.

Distribution 25%

The cost of moving electricity over from your local lines company to your property.

Metering 5%

The cost from companies that own, maintain and read electricity meters.

Other less than 1%

This covers the Electricity Authority Levy. The Electricity Authority is responsible for the operation of the electricity market.

Want to see how your energy usage spend compares to your other household expenses? View more information here.
* GST makes up 13% of the total bill price incl. GST. 

100% renewable generation

100% of our generation comes from renewable sources – hydro and geothermal. This is something we're pretty proud of. It is good for New Zealand and it’s great for our customers to know that we contribute towards a healthier environment.

We ♥ NZ

Partnerships and kaitiakitanga are at the heart of our business. We are proud to assist with the wellbeing of the New Zealand community by supporting a number of organisations. 

Wonderful discounts



We’ve joined forces with Air New Zealand, and you’ll now be that bit closer to taking off every time you switch on with Mercury.

Fly further


Join the and e.scooter movement. A fun, affordable way to keep moving. Check out our exclusive deals and take a test ride at one of our retail partners.

View e.bikes and e.scooters


Fuel your EV for the equivalent of 30c per litre. Plug in at home and save 20% on your entire home's electricity usage between 9pm - 7am every day.

Fuel up for less