Best Power Companies in New Zealand: Who Offers the Cheapest Rates?

There is no single correct answer to this question. The cheapest power company in New Zealand depends on where you live and how much power you use. A household in Auckland on a standard plan will get a different answer from a household in Christchurch on a low-user plan. The network lines charge — set by the local lines company, not your retailer — makes up roughly half your bill and varies by region. A retailer that is cheap in Vector territory (Auckland) can be mid-range in Orion territory (Christchurch).

The only way to find the best plan is to compare your actual usage at your address. Powerswitch, run by Consumer NZ, is the best tool for this. Enter your address or upload a recent bill and it shows you the cheapest plans ranked by total annual cost. Powerswitch users save around NZ$450 per year on average.

The Pricing Structure

Every power bill has two parts: a daily fixed charge (you pay it regardless of how little you use) and a variable rate per kilowatt-hour consumed. Low-user plans have a lower daily charge but a higher per-kWh rate. Standard plans have a higher daily charge but a lower per-kWh rate. The break point is roughly 8,000 kWh per year. If your annual usage is below that, a low-user plan is likely cheaper. Above it, a standard plan works better.

Promotional discounts of 10% to 20% for prompt payment are common. These effectively reduce the headline rate but introduce a penalty if you pay late. Some retailers now offer "no discount" plans with lower headline rates but no late payment penalty — often better for people who occasionally miss the due date.

Winter vs summer usage patterns also affect which plan works best. Households that use significantly more power in winter for heating should consider plans with a lower per-kWh rate and a willingness to accept the higher winter bills, rather than a low-user plan with a high variable rate that multiplies the winter usage cost.

The Major Players

Contact Energy: One of the four major gentailers (generators + retailers). Offers electricity, gas, broadband, and mobile bundles. The bundling discounts are real — moving broadband and mobile to Contact can save NZ$10 to NZ$20 per month on power — but only if the individual rates for each service are competitive on their own. Always compare the bundle total against the cheapest stand-alone services.

Mercury: Another major gentailer, recently merged with Trustpower. Electricity, gas, broadband, and mobile bundles available. Emphasis on renewable generation. Loyalty perks for long-term customers.

Genesis Energy: Electricity, gas, and LPG. Reward programmes and discounts. Owns Frank Energy, a low-cost no-frills brand.

Meridian Energy: 100% renewable generation. Limited bundling options compared to the other gentailers. Appeals primarily to environmentally conscious customers.

The gentailers all operate across the full NZ market, but their regional competitiveness varies. Contact tends to be competitive in Auckland and Christchurch. Mercury is strongest in the North Island. Genesis pricing is relatively consistent nationwide. Meridian originates from the South Island and tends to have a stronger position there.

The Low-Cost Independents

Electric Kiwi: Known for competitive pricing and the "Power Hour" — one hour of free power per day. A solid option for households that can shift the bulk of their energy consumption to a predictable window.

Frank Energy: Owned by Genesis but priced as a low-cost brand. No frills, no bundles, no loyalty programme. Transparent billing and consistent rates. One of the cheapest options in many regions.

Flick Electric: Passes through wholesale electricity prices directly. Your rate changes every half hour based on the wholesale market. Good for households that can shift usage to cheap periods, but unpredictable for anyone who wants a consistent bill.

Octopus Energy: Recent entrant from the UK. Competitive pricing and a clean digital experience. Growing presence in New Zealand markets.

Powershop: Pre-pay model where you buy "packs" of power in advance at the current wholesale rate. Appeals to budget-conscious users who want to lock in low rates during dips.

The Bottom Line

Switching power companies takes three to four days, causes no power outage, and costs nothing. Despite this, Consumer NZ data shows roughly 42% of households have been with the same provider for more than five years, and about 25% for more than ten. On average savings of NZ$450 per year from switching, staying with the same provider for five years without comparing represents roughly NZ$2,250 in forgone savings.

Run a comparison on Powerswitch now. If you find a cheaper plan, switch. Do it again in twelve months. The providers change their rates regularly and loyalty is not rewarded in the New Zealand power market.