How to cancel Mercury energy and switch providers in new zealand

Understanding Mercury and why you might want to cancel

Mercury is one of New Zealand's largest energy and telecommunications providers, supplying electricity, gas (including LPG through Elgas), broadband, and mobile services to households and businesses nationwide. You may have chosen Mercury for competitive pricing, bundled service discounts, or their reputation, but circumstances shift. Whether you're moving house, switching to a cheaper provider, or consolidating services elsewhere, you deserve a straightforward cancellation process backed by clear legal rights.

At Yafee, we understand that cancelling utilities can feel unnecessarily complicated. This guide walks you through your consumer protections under New Zealand law, the exact steps to cancel Mercury services, what fees you may face, and how to claim any refunds owed to you. We've helped thousands of consumers navigate energy and telecom cancellations, and we know where Mercury's process can trip you up.

Mercury services and bundling

Mercury offers electricity plans (both open-term and fixed-term contracts), LPG cylinder supply, broadband packages, and mobile plans. Many customers bundle these services for convenience, which can complicate cancellation if you want to end only one service rather than all of them.

Unlike some providers, you cannot cancel Mercury services through their website or mobile app. You must contact Mercury directly by phone, letter, or email. Understanding which services you hold before you start will save time and reduce the risk of accidental ongoing charges.

Common reasons to cancel Mercury

Customers typically cancel Mercury when a competitor offers better rates, when they relocate and want to switch providers, when they're dissatisfied with customer service, or when they're locked into a fixed-term contract above current market rates. Early termination fees may apply if you're within a contract period, but calculating the fee against potential savings often makes early exit worthwhile. Yafee recommends comparing your savings over 12 months against any exit fee before you decide.

Your consumer rights when cancelling energy and telecommunications services

New Zealand consumer law provides strong protections when you cancel utilities and telecommunications services, regardless of contract length.

Consumer guarantees act 1993 protections

The Consumer Guarantees Act 1993 requires that services-including electricity supply, gas, and broadband-be provided with due care and skill, be fit for purpose, and be delivered within a reasonable timeframe. If Mercury has failed to meet these standards, you may have grounds to cancel without penalty and claim compensation, even within a fixed-term contract.

For example, if Mercury's service has been persistently unreliable, if you were misled about pricing or terms when you signed up, or if they've breached their own Consumer Care policy, the Act gives you negotiating leverage. Document any service failures, outages, or complaints in writing before you cancel. This creates a formal record that strengthens your position if Mercury challenges an early termination fee.

Cooling-off rights and fair trading protections

If you signed up for a bundled mobile or broadband service with Mercury, you may have a 14-day cooling-off period from the date you entered the contract. Within this window, you can cancel without penalty. For electricity and gas services, cooling-off rights typically do not apply once supply has begun, but for telecommunications services they do. Check your contract documents to confirm the start date and any cooling-off period stated in your welcome pack or confirmation email.

The Fair Trading Act 1986 also protects you against misleading representations. If Mercury cannot clearly show you received their terms in writing before you agreed to them, that strengthens your negotiating position if they attempt to charge an early termination fee.

Your legal position

You are protected by the Consumer Guarantees Act 1993 and the Fair Trading Act 1986. If Mercury has breached these Acts-for example, by failing to supply reliable service or by misrepresenting terms-you can cancel without penalty. If Mercury refuses, you can escalate to the Commerce Commission or pursue a claim in the District Court (for claims up to NZD$15,000) or the High Court. Yafee recommends keeping all written correspondence with Mercury to support your position.

How to cancel Mercury step by step

Mercury does not allow cancellation through its website or app, so you must contact them directly using one of the approved methods below.

Step 1: gather your account details

Before you contact Mercury, collect your account number (visible on your latest bill or online account), your customer reference number, and the address where the service is registered. Have your contact phone number and email address ready. If you're in a fixed-term contract, note the contract end date and any early termination fees stated in your contract documents.

Step 2: contact Mercury to request cancellation

You can cancel by phone, letter, or email. Use the most formal method available to create a written record of your request. Mercury's contact details are listed at the end of this guide.

1. By phone:
   • Call Mercury's customer service team on 0800 964 362 (toll-free within New Zealand)
   • Confirm your account details and state you wish to cancel all services or specific services
   • Ask for the cancellation reference number and expected disconnection date
   • Request written confirmation of the cancellation by email or letter
2. By email:
   • Send an email to the address provided on Mercury's website (typically support or customer care email)
   • Include your full name, account number, and the date you wish to cancel
   • State which services you are cancelling (electricity, gas, broadband, mobile, or all)
   • Request written acknowledgment and a cancellation reference number
3. By post:
   • Send a letter to Mercury's primary address in Auckland (see contact details below)
   • Include your account number, service address, and cancellation date
   • Request written acknowledgment and a cancellation reference number
   • Send via registered post or courier to create proof of delivery

Step 3: confirm your cancellation notice period

Mercury typically requires 5 working days' notice to process a cancellation, though this varies depending on the service and your contract terms. Ask Mercury directly whether your cancellation takes effect immediately or after a notice period. If you're providing written notice, Mercury counts the notice period from the date they receive your letter or email, not the date you send it.

Step 4: arrange final meter readings

For electricity and gas services, Mercury will arrange a final meter reading on your disconnection date. Ensure someone is available at your property, or arrange access in advance. Take your own photo of the final meter reading to keep on record. If you're moving house, provide Mercury with your new contact address so they can send your final bill.

Step 5: review your final bill and check for refunds

Mercury will send your final bill within 5 working days of disconnection. Check the bill carefully for the following: that your final meter reading matches your own reading, that you've been credited for any unused credit, that no ongoing charges appear after your disconnection date, and that any early termination fees have been correctly calculated and disclosed.

Early termination fees and contract break costs

Mercury may charge an early termination fee if you cancel during a fixed-term contract period. These fees vary depending on your contract, the type of service, and how much of the contract period remains.

Ask Mercury for a written breakdown of any early termination fee. If the fee appears excessive or Mercury cannot justify it, you can dispute it. Under the Consumer Guarantees Act, you can challenge unreasonable contract terms. Yafee recommends comparing the fee against the savings you'll make with a new provider-often switching is worth the cost.

Refunds, final bills, and credit balances

Mercury must refund any credit balance on your account within 5 working days of disconnection. This includes unused prepayment, overpaid amounts, and any promotional credits.

What to check on your final bill

• Final meter reading matches the reading taken at disconnection
• All charges have been calculated to the disconnection date, not beyond
• Any ongoing service charges have been removed
• You've been credited for any unused monthly service fees (for example, if you cancel mid-month)
• Any promotional discounts have been properly reflected in the final calculation
• Any early termination fee is itemised and explained

How to claim a refund if Mercury owes you money

If Mercury's final bill shows they owe you money, the refund should be processed automatically within 5 working days. Check your nominated bank account. If the refund hasn't arrived after 10 working days, contact Mercury with your cancellation reference number and request a refund status update.

If Mercury refuses to refund money you believe is owed, or if you dispute their final bill calculation, you can lodge a complaint with the Banking Ombudsman Scheme (if you paid by direct debit) or escalate to the Commerce Commission. Document your dispute in writing and retain copies of all correspondence.

Common mistakes when cancelling Mercury

Cancelling utilities can feel stressful, but most problems are avoidable if you follow a few key steps.

Mistake 1: not requesting written confirmation

If you cancel by phone only, Mercury has no formal record of your request. Always ask for a cancellation reference number and request written confirmation by email or letter. This protects you if Mercury later claims you never cancelled and continues charging you.

Mistake 2: missing the cooling-off period

If you signed up for a bundled broadband or mobile service within the last 14 days, you may be able to cancel without penalty. Check your contract start date. If you miss this window, you may face an early termination fee. Yafee recommends acting quickly if you're within this period.

Mistake 3: accepting early termination fees without question

Mercury may quote a high early termination fee, but you have the right to challenge it. Under the Consumer Guarantees Act, if Mercury has breached their obligations (for example, through poor service), the fee may be waived. Request a written justification of the fee and compare it against your potential savings with a new provider.

Mistake 4: not taking a final meter reading

If you don't record the final meter reading yourself, you rely entirely on Mercury's reading. Take a photo of your meter on the disconnection date and send it to Mercury as evidence. This protects you if there's a dispute about your final bill.

Mistake 5: cancelling one service without checking bundle terms

If you're bundled with Mercury and want to cancel only electricity (for example), check whether cancelling one service triggers early termination fees on the others. Some bundle contracts require you to cancel all services together or face penalties. Contact Mercury to clarify your bundle terms before you cancel.

What happens after cancellation

Once Mercury has processed your cancellation, you should expect disconnection within 5-10 working days, depending on your contract terms and the service type.

After electricity or gas disconnection

Mercury will remove the meter or isolate the supply line at your property. You won't be able to use the service after disconnection. If you've arranged a new provider, they will contact you to arrange a connection date. Don't assume a new provider's connection date will align with Mercury's disconnection-coordinate the dates directly with both companies to avoid being without supply.

After broadband or mobile cancellation

Your broadband connection will be deactivated on the date specified. Your mobile number may be ported to a new provider if you've arranged this in advance. Ensure your new provider is ready to activate before Mercury disconnects your old service, particularly if you need continuous service for work or emergency contact.

Final bill timeline

Mercury will send your final bill within 5 working days of disconnection. If you've overpaid, the refund will be processed within a further 5 working days. If you've underpaid, Mercury will issue an invoice for the shortfall. Keep your final bill for tax and moving records.

Your consumer protections and dispute resolution

If Mercury refuses to cancel, charges what you believe is an unjustified early termination fee, or fails to refund money owed, you have formal dispute resolution options backed by New Zealand consumer law.

Informal resolution

First, lodge a formal complaint in writing with Mercury's customer service team. Include your cancellation reference number, account details, and a clear statement of what you believe Mercury has done wrong. Request a written response within 10 working days. Many disputes are resolved at this stage if you present evidence clearly.

Escalation to the commerce commission

If Mercury doesn't resolve your complaint, you can escalate to the Commerce Commission, which enforces the Consumer Guarantees Act 1993 and the Fair Trading Act 1986. The Commission can investigate whether Mercury has breached consumer law and, if so, can issue enforcement orders or penalties. Your complaint is free, and the Commission will correspond with Mercury on your behalf.

District court or high court claim

If your dispute is about money (for example, a disputed early termination fee or refund), you can file a claim in the District Court for amounts up to NZD$15,000, or in the High Court for larger claims. You do not need a lawyer, though legal advice is recommended. Court fees apply, but if you win, you can recover these from Mercury.

Switching to a new provider

Once you've cancelled Mercury, plan your switch to a new provider carefully to avoid service gaps or overlapping charges.

Yafee recommends applying with your new provider at least 2 weeks before your Mercury disconnection date. This gives you time to activate new services before Mercury cuts off your old ones. Check whether your new provider offers any balance transfer credits or incentives for switching-these can offset early termination fees.

Cancellation address and contact details

Mercury accepts cancellation requests by phone, email, or post. Use the details below to ensure your cancellation reaches the right department.

By phone

Call Mercury customer service on 0800 964 362 (toll-free within New Zealand). Lines are open Monday to Friday, 8am to 6pm, and Saturday 9am to 3pm (NZ time). Have your account number ready.

By email

Send cancellation requests to Mercury's customer care email address. Check Mercury's official website for the current email address, as it may change. Include your account number, full name, service address, and preferred disconnection date in your email subject line.

By post

Send your cancellation letter to Mercury's primary mailing address in Auckland:

Mercury Limited
Private Bag 92214
Auckland 1142
New Zealand

Alternatively, Mercury lists a Tauranga address for correspondence:

Mercury Limited
Private Bag 1
Tauranga 3010
New Zealand

Send via registered post or courier to create proof of delivery. Mercury typically confirms receipt within 5 working days.

Protecting yourself: cancellation checklist

Before you cancel, work through this checklist to ensure you have all the information and protections you need.

• Confirm which services you are cancelling (electricity, gas, broadband, mobile, or all)
• Check your contract for any early termination fees and cooling-off periods
• Note your account number, customer reference, and service address
• Calculate whether early termination fees are outweighed by new provider savings
• Document any service failures or complaints in writing
• Apply with a new provider before cancelling Mercury (to avoid service gaps)
• Contact Mercury and request written confirmation of your cancellation
• Ask for a cancellation reference number and expected disconnection date
• Take a photo of your final meter reading on disconnection day
• Check your final bill for accuracy and claim any refunds owed
• Retain all correspondence for 12 months in case of disputes

Summary

Cancelling Mercury is straightforward if you follow the correct procedure and understand your consumer rights. You are protected by the Consumer Guarantees Act 1993 and the Fair Trading Act 1986, which give you the right to cancel if Mercury breaches their obligations, and which limit early termination fees to reasonable amounts.

Contact Mercury by phone, email, or post with your account details and cancellation date. Ask for written confirmation and a cancellation reference number. Take your own final meter reading, review your final bill for accuracy, and claim any refunds owed. If Mercury refuses to cancel, charges an unjustified fee, or fails to refund money, escalate to the Commerce Commission or pursue a claim in the District Court.

Yafee has helped thousands of consumers cancel utilities and energy providers across New Zealand, and we know the legal framework and procedural steps that protect you. Whether you're switching to a cheaper provider, moving house, or consolidating services, your rights are clear. Use this guide as your roadmap, keep written records of all contact with Mercury, and don't hesitate to escalate if Mercury refuses to honour your rights under New Zealand consumer law.