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Join Mercury Energy for 100% renewable power and access to Mercury Rewards. Earn points on every bill.
Quick answer: Join Mercury for 100% renewable power and the current joining offers: a $300 electricity credit on a 1-year term, 12 months half-price broadband and mobile when you bundle, or a free Samsung product on a 2-year electricity plus broadband term. Terms apply.
What is Mercury Energy?
Mercury is one of NZ's largest electricity retailers, generating 100% renewable power from hydro, geothermal and wind. Electricity, gas, broadband and mobile run on one account, with Mercury Rewards earned on your bills.
Mercury joining offers at a glance
| Offer | What you get | Condition |
|---|---|---|
| Electricity credit | $300 credit | Join electricity on a 1-year term |
| Broadband | 12 months half price | Bundle broadband with electricity on an eligible plan |
| Mobile | 12 months half price | Bundle mobile with at least one other Mercury service |
| Bundle gift | Free Samsung product | Join electricity plus broadband on a 2-year term |
| No term | Open-term flexibility | Join electricity and broadband with no fixed term |
Mercury can change these offers, so confirm what applies on the quote screen. Broadband starts from $70 per month on FibreLite and availability varies by address; router charges may apply including $14.95 postage. Mobile half-price covers plan charges only.
Is a "Mercury Energy promo code" the same as a referral link?
Mercury does not use typed checkout codes. Joining offers attach to the quote: you enter your address at mercury.co.nz/join and the current credit or bundle deal applies to the plan and term you pick. Searches for Mercury promo code, Mercury referral code and Mercury discount code all land in the same place. See promo code vs referral code.
How Mercury compares for switching
Mercury's strength is the bundle: power plus broadband or mobile on one bill, 100% renewable generation, and Rewards on your account. Contact Energy runs its own bundle credit (up to $600 across 12 months with code BROADBAND25), so price both against your own usage before switching.
How to claim a Mercury joining offer
- Open the Mercury join link.
- Enter your address and usage for a quote.
- Pick the plan and term that carries the offer you want: 1-year electricity for the $300 credit, or the 2-year electricity plus broadband bundle for the free Samsung.
- Confirm the offer shows on your quote before accepting, because the credits depend on the plan and term.
- Complete the switch and Mercury arranges the transfer from your current retailer.
Terms to check before switching
- The $300 electricity credit applies to a 1-year term, and early termination fees apply if you leave inside the term.
- The free Samsung product needs a 2-year electricity plus broadband term and carries early termination fees.
- Half-price broadband applies to an eligible plan, availability varies by address, and router charges may apply including $14.95 postage and handling.
- Half-price mobile applies to plan charges only.
- Offers and prices are Mercury's and can change: confirm on the quote screen and in Mercury's published terms.
Last updated: September 2026
Related deals
Offer terms, eligibility, and availability can change. Confirm final details on the provider website or at checkout before you pay.
Frequently asked questions
Does Mercury Energy have a sign up bonus?
Yes, and it is the joining offer rather than a separate code. Mercury advertises a $300 electricity credit on a 1-year term, 12 months half-price broadband and mobile when you bundle them, or a free Samsung on a 2-year electricity plus broadband term. Which one applies depends on the plan and term you choose, so confirm the current version on Mercury's join page before signing up.
What joining offers does Mercury have right now?
Mercury currently advertises a $300 electricity credit when you join electricity on a 1-year term, 12 months half-price broadband when broadband is bundled with electricity, 12 months half-price mobile when mobile is bundled with another service, and a free Samsung product when you join electricity plus broadband on a 2-year term. Mercury can change these offers, so confirm what applies on your quote.
How do I get the $300 electricity credit?
Join Mercury for electricity on a 1-year term through the join link on this page. The credit is applied to the new account under Mercury's offer terms, and early termination fees apply if you leave before the term ends.
Is there a Mercury promo code to type in?
No. Mercury does not use typed checkout codes: offers are attached to the quote once you enter your address and choose a plan and term. Searches for Mercury promo code, Mercury referral code or Mercury discount code all reach the same join flow.
What is the free Samsung offer?
When you join Mercury for electricity and broadband on a 2-year term you can choose a free Samsung product. Terms, eligibility and early termination fees apply, and router charges may apply including $14.95 postage and handling.
How does the half-price broadband work?
Mercury gives 12 months half price on monthly broadband when you bundle broadband with electricity on an eligible plan. Broadband availability varies by address, prices can change during the term, and early termination fees apply.
How does the half-price mobile offer work?
You get 12 months half price on your monthly mobile plan when you bundle mobile with at least one other Mercury service, such as electricity, gas or broadband. The discount applies to plan charges only.
Can I join Mercury without a fixed term?
Yes. Mercury also offers an open-term option for electricity and broadband with no fixed term. The $300 credit and the free Samsung gift are tied to the 1-year and 2-year terms described above, so check which combination suits you.
Is Mercury Energy renewable?
Yes. Mercury generates 100% renewable electricity from hydro, geothermal and wind generation in New Zealand, and runs Mercury Rewards on top of your account.
How does Mercury compare with Contact Energy?
Both run bundle credits. Contact Energy advertises up to $600 across 12 months with code BROADBAND25 on an eligible bundle, while Mercury leads with the $300 electricity credit and half-price broadband or mobile. Quote both against your own usage: see our power comparison at /compare-energy/.
Is this financial advice?
No. This page is information about Mercury's current joining offers. Prices, credits and terms change, so confirm the final details on the Mercury quote screen before you switch.
