Skip to main content
Selectra New Zealand
Mercury Energy logo
NZ electricity retailer

Mercury Energy electricity

Founded in 1999 and headquartered in Auckland, Mercury Energy supplies electricity to households across New Zealand. Compare plans, contact, app, ownership and reviews below.

See Mercury plans Contact Mercury
Founded 1999 906,000 connections (FY2025) New Zealand Publicly listed

Founded

1999

Years in NZ market

Customers

906,000 connections (FY2025)

Connections served

Employees

1,364

Workforce size

Revenue

NZ$3.50B in FY2025

Most recent annual

About

Who is Mercury Energy?

The company is headquartered in Auckland, where it bases its senior management, customer operations and regulatory functions.

Mercury Energy was established in 1999. A longer track record means more years operating under New Zealand's regulatory framework and a wider history of customer feedback, billing systems and grid relationships.

Mercury Energy operates independently — it is not part of a larger corporate group. This typically means faster decision-making and a more direct relationship with customers.

The company is based in New Zealand and is regulated by the Electricity Authority and the Commerce Commission.

Mercury plans

Current Mercury Energy electricity plans

Live plan data from the Selectra Energy-Core API. Compare contract length, exit fees, solar buy-back and renewable status side-by-side, then confirm your address-specific quote with the retailer before switching.

Mercury Energy logo
Domestic

Everyday Open Term

Contract
no fixed term
Exit fees
no exit fees
Solar buy-back
8.5c per kWh (excl. GST)
Bond / deposit
Bond or prepayment may be required up to $150

Perks & tags

Green energy No exit fees Can add gas Can add broadband Ev plan Low user offer Standard user offer Uncontrolled Controlled Composite Day night plan Night boost Solar buy back
Mercury Energy logo
Domestic

Piped Natural Gas (Residential)

Contract
no fixed term
Exit fees
No exit fees
Solar buy-back
8.5c per kWh (excl. GST)
Bond / deposit
up to $150
Mercury Energy logo
Business

Business Fixed Pricing

Exit fees
No exit fees

Perks & tags

Green energy Can add gas Can add broadband Solar buy back
Mercury Energy logo
Business

Business Spot Pricing

Exit fees
2.0c per kWh of forecast consumption remaining in the term + $140 admin fee per ICP (plus GST)
Solar buy-back
8.5c per kWh (excl. GST)

Perks & tags

Green energy Smart meter required Can add gas Can add broadband Solar buy back
Mercury Energy logo
Business

Business Blended Pricing

Exit fees
No exit fees

Perks & tags

Green energy Can add gas Can add broadband Solar buy back
See Mercury plans in detail

Self-service

Manage your Mercury account online

Pay bills, track consumption, update payment details and message support — without a phone call.

Online account

Web portal for desktop & tablet

  • View and download every bill since you joined.
  • Submit a self-read meter reading.
  • Update bank details, address and payment method.
  • Message customer service without queueing on the phone.
Sign in to Mercury

Mercury App mobile app

iOS & Android

  • Real-time consumption alerts and usage graphs.
  • Push notifications for new bills and payment confirmations.
  • Quick pay with stored card or direct debit.
  • Manage rewards, promotions or free-hour periods (where offered).
Google Play App Store

Get in touch

Contact Mercury Energy

Phone

0800 10 18 10

Mon–Wed & Fri 8:00am–6:00pm; Thu 9:00am–5:00pm (general enquiries)

Email / contact form

[email protected]

Head office

33 Broadway, Newmarket, Auckland 1023

Faults & emergencies

0800 10 18 10 (24/7 for energy faults and outages)

Verdict

What to expect from Mercury Energy

Regulated NZ retailer

Mercury Energy is licensed by the Electricity Authority and bound by the Consumer Care Guidelines for residential customers.

Switching is free

Joining Mercury takes 5–10 working days. Your power supply is not interrupted, and the new retailer handles the transfer with your old one.

Compare before you switch

Always cross-check Mercury prices against other retailers — savings depend on your kWh usage and region.

Save up to $400 per year
Free comparison, no commitment

Not sure Mercury Energy is the cheapest option for you?

Kiwi households can save up to $400 per year by switching to the right retailer for their usage. Compare every NZ electricity retailer in under a minute.

Compare all NZ retailers

Common questions

The Selectra expert answers your questions about Mercury Energy

Mercury Energy is one of New Zealand's licensed electricity retailers, regulated by the Electricity Authority. Whether it is the right fit for your household depends on your usage profile, region, and the rates available on the plans listed above. Always compare your quoted price against several other retailers based on your address and 12-month consumption before you switch.

Switching to Mercury Energy is usually completed within a few days, up to a regulated maximum of 10 working days, and your power supply is never interrupted. Sign up online with your address and ICP number (printed on any past power bill). Mercury Energy will handle the transfer with your current retailer, including the final reading.

New Zealand consistently runs one of the greenest grids in the OECD: around 80% to 90% of grid electricity comes from renewable sources (hydro, geothermal, wind), with recent full-year figures sitting above 85% and individual quarters occasionally exceeding 95%. Some retailers (notably Mercury and Meridian) market themselves as 100% renewable. Check the plan badges above — offers tagged green energy are sold as renewable-only.

Most NZ electricity plans have no exit fees on open-term contracts. Fixed-term plans may include a break fee if you switch before the term ends. The "Exit fees" line on each plan card above shows the current policy.

You can reach Mercury Energy by phone at 0800 10 18 10, Mon–Wed & Fri 8:00am–6:00pm; Thu 9:00am–5:00pm (general enquiries). Most retailers also offer in-app support, web chat and an online help centre — see the Account & app section above.