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App login & account access

Mercury Energy login

Sign in to your Mercury Energy account in seconds. View and pay bills, track real-time electricity usage, submit meter readings, manage payment options and receive account notifications — from the Mercury App or the web portal.

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Overview

How the Mercury Energy login works

The Mercury Energy login process gives New Zealand customers secure access to their online account or mobile app. Once you're in, you can view and pay bills, check past transactions, track electricity (and where relevant gas or broadband) usage in real time, submit meter readings, manage payment options and receive account notifications.

You can sign in two ways: through the Mercury Energy customer portal on the web (best on a laptop or desktop) or through the Mercury App on your phone or tablet. Both share the same credentials, so a single email and password gets you into either.

Step-by-step

Mercury Energy login for the first time

Follow these six steps once and the Mercury App will remember you from then on.

1

Download the Mercury App

Get the official Mercury Energy app from Google Play, the App Store or your device's app store. Avoid third-party download mirrors.

2

Create or register your account

Open the app and choose Register or Create account. Enter your email and create a strong password.

3

Enter your account number or ICP

Provide the account number or ICP printed on a recent Mercury Energy bill so the app can link your supply to the new login.

4

Confirm your email address

Click the verification link in the email you receive. This activates the new login.

5

Sign in

Return to the app and sign in with your email and password.

6

Enable biometric login (optional)

Switch on Face ID, fingerprint or a PIN inside the app settings to skip the password from now on.

Open the Mercury sign-in page

Get the app

Where to download the Mercury App

Always install from the official store below. Avoid sideloaded APKs or third-party mirrors.

Google Play

Mercury App for Android

App Store

Mercury App for iPhone & iPad

Why use it

What you can do in the Mercury App

Using the Mercury Energy app makes managing your account simpler than relying on paperwork or phone calls. Bills, usage, payments and customer support live in a single place — and push notifications keep you on top of what matters.

Mercury Energy app features

  • View and pay your bill securely in-app.
  • Track electricity usage hourly, daily, and monthly.
  • Receive weekly usage summary notifications each Wednesday.
  • Manage electricity, gas, broadband, and mobile services.
  • Track piped gas usage where available, if eligible.
  • Order LPG bottle refills directly within the app.
  • View broadband data usage and connection status.
  • Monitor mobile plan usage and purchase add-ons.
  • Check known outages, faults, and planned maintenance.
  • Start a chat with TILI or support.
  • Update account details, login email, and password.
  • Set up SmoothPay budgeting from the app.
  • Earn rewards points from payments and challenges.
  • Redeem rewards, including Free Power Days offers.

Real user feedback

What people say about the Mercury App

App-store ratings tell you which features actually work in daily use — which screens are easy, where bill payments or usage tracking shine, and where customer support pays off. Use these numbers as one data point before you commit.

App-store reviews for the Mercury App
Platform Rating Reviews
App Store 4.6 / 5 4,700
Google Play 4.2 / 5 100,000
Read real customer reviews of Mercury Energy

Resolve issues quickly

Common login problems with the Mercury App

Most Mercury Energy sign-in errors fall into one of five buckets. Walk through the matching row below before contacting support.

Did not receive the verification or password-reset email

Possible causes

  • Wrong email address used at sign-up
  • Email landed in Spam, Junk or Promotions
  • Corporate or ISP filter blocked delivery

How to fix it

  1. 1 Search your mailbox for "Mercury Energy"
  2. 2 Check Spam, Junk and Promotions folders
  3. 3 Add the sender to your safe-senders list
  4. 4 On a work email, ask IT to whitelist the retailer domain
  5. 5 Still nothing? Call support with your account number

Account number or ICP not recognised

Possible causes

  • Wrong reference entered
  • Typos (O vs 0, extra spaces)
  • Bill belongs to a different property or person

How to fix it

  1. 1 Use the number labelled "Account number" (or ICP) exactly as printed on a recent bill
  2. 2 Strip spaces, hyphens and trailing dots
  3. 3 Photograph the bill and contact customer service if it still fails

Saved credentials stopped working after an app update

Possible causes

  • The update invalidated the saved session token
  • Forced password rotation by the retailer

How to fix it

  1. 1 Sign in again with your email and password
  2. 2 Reset your password from the login screen if needed
  3. 3 Re-enable biometric login (Face ID or fingerprint) after the new sign-in

Two-factor or verification code never arrives

Possible causes

  • Phone number on file is out of date
  • Mobile-network or SMS-gateway delay
  • Network filters blocking short-code SMS

How to fix it

  1. 1 Check the phone number stored on your account
  2. 2 Request a voice call instead of an SMS if the app offers it
  3. 3 Switch to an authenticator app if supported
  4. 4 Wait a couple of minutes; codes occasionally arrive late

Multiple ICPs or properties linked to one login

Possible causes

  • Same email used for several supply points
  • Moved house and old ICP still attached

How to fix it

  1. 1 Use the in-app account or property switcher
  2. 2 Ask Mercury Energy to merge or split ICPs to the right profile
  3. 3 Confirm the active ICP before paying so the right bill is settled
Still stuck? Contact Mercury Energy support on 0800 10 18 10 (Mon–Wed & Fri 8:00am–6:00pm; Thu 9:00am–5:00pm (general enquiries)).
Save up to $400 per year
Login is just half the story

A smooth login won't fix a bad plan with Mercury.

A great app makes managing your account easier, but the real saving comes from being on the right tariff. Kiwi households can save up to $400 per year by switching to a retailer that fits their actual usage.

Compare all NZ retailers

Common questions

Mercury Energy login — frequently asked questions

Download the official Mercury App from your phone's app store (or open the customer portal on a desktop). Choose Register if you don't yet have a login, enter your email and create a password, then provide the account number or ICP printed on a recent Mercury Energy bill. Confirm your email via the verification link and you're in. Most apps then offer biometric login (Face ID or fingerprint) for faster future sign-ins.

Tap Forgot password? on the login screen of the app or the customer portal and enter the email you used at sign-up. A reset link is emailed within a minute or two. If it doesn't arrive, check Spam and Promotions, then contact Mercury Energy support directly on 0800 10 18 10.

The app gives you the same things you'd expect from any modern NZ retailer: view and download bills, track electricity (and where applicable broadband or gas) usage, pay invoices with a saved card or direct debit, submit a self-read meter reading, update bank details and message customer service without queueing on the phone. Push notifications alert you when a new bill is issued or a payment goes through.

The Mercury App is published on the official Google Play and Apple App Store channels and uses standard HTTPS plus token-based authentication. Enable biometric login (fingerprint or Face ID) and a screen-lock on your device for an extra layer of protection. Never share your password by email or SMS — Mercury Energy support will never ask for it.

Yes. If you have several ICPs (a holiday home, a tenancy, a small business) you can link them to a single login and switch between them inside the app. If your old property is still listed after a move, contact Mercury Energy so the ICP is moved off your profile and you stop seeing bills that aren't yours.