Electricity affordability and winter security of supply have become one of New Zealand's most contested economic issues, as households face steadily rising power bills, businesses confront volatile wholesale costs, and politicians argue over whether the market structure built in the 1990s is fit for purpose.

What's happening:

• Retail power prices rose about 12% in 2025 and are forecast to climb at least 5% in 2026, according to Consumer NZ — meaning electricity has risen 12.5% in the year to March 2026, four times the overall rate of inflation, and has been the single biggest contributor to annual inflation for three consecutive quarters. Prices are now roughly 60% higher in real terms than 25 years ago when the market was reformed.
• A key driver is lines (network) charges, which rise again from 1 April 2026, adding about $5 a month to the average bill, with increases projected to continue until at least 2030. Distribution and transmission make up just over 30% of a typical bill, pushed up by inflation, higher interest rates and replacing ageing 1960s–70s assets. Commerce Commission Associate Commissioner Nathan Strong framed this as "hitting the goldilocks point" — not so high companies earn excessive profits, not so low they can't invest.
• In winter 2024 a dry-year, gas-shortage shock sent the seven-day average wholesale price above $800/MWh in early August 2024, up from roughly $300/MWh in July, as hydro storage hit a six-year low and wind output often fell below 300MW against 1,000MW+ of capacity.
• An analysis by Sense Partners for MBIE estimated high electricity prices cut GDP by about $5.2 billion between mid-2017 and 2025, with wholesale prices more than doubling over that period.
• The four "gentailers" — Genesis, Contact, Mercury and Meridian — both generate and retail power; their combined operating profit was forecast near $1.86 billion for the half-year to December 2025, up about 44%, fuelling the market-structure debate. Contact Energy alone posted $205 million profit for the same period.
• From 1 July 2026, mandatory non-discrimination obligations require the four gentailers to offer independent retailers the same hedge contract terms as their own retail arms. Financial penalties rise from $2 million to up to $10 million or a percentage of turnover. Energy Minister Simeon Brown said this will mean "smaller retailers can compete on fair terms."

Where the parties stand:

• The National-led Government commissioned a Frontier Economics review of electricity market performance, launched in January 2025 and reported in October. Through Energy Ministers Simon Watts and then Simeon Brown, the Government launched procurement for an LNG import terminal at Port Taranaki, strengthened the Electricity Authority, and imposed non-discrimination rules — while rejecting Frontier's recommendations for a Crown thermal entity, divesting Crown gentailer stakes, and merging the Electricity Authority with the Gas Industry Company. In June 2026 Brown scrapped the original consumer levy for the LNG facility, instead placing the cost on the gentailers. Prime Minister Christopher Luxon blamed the previous oil-and-gas exploration ban for tight gas supply.
• NZ First wants to go further: Winston Peters' January 2026 State of the Nation speech called for breaking up the big four energy companies, separating generation from retail, ending the pricing system where the most expensive generator sets the market price, and guaranteeing long-term fixed-price contracts for new generation. Peters stated "New Zealanders are being screwed" by current pricing structures.
• The Green Party's Scott Willis has a Member's Bill ready to separate generation and retail while allowing common ownership — modelled on the Telecom/Chorus structural separation. The Greens also push a 100% renewable electricity grid by 2030, arguing more renewables and storage are the durable fix, and have called for winter energy payments for 500,000+ lower-income households.
• TOP's Abundant Energy policy targets 300% renewables, framing cheap clean electricity as a cornerstone of industrial and economic growth.
• Labour's energy spokesperson Megan Woods called the Government's October 2025 response "tinkering around the edges." Leader Chris Hipkins said the electricity market "is not operating as we need it to operate" and Labour is open to fundamental structural change, including gentailer separation.
• Consumer NZ chief executive Jon Duffy warned the country "won't grow the economy if people can't afford inputs", and Powerswitch general manager Paul Fuge said the rises are "causing harm to households." Rewiring Aotearoa CEO Mike Casey argued solar delivers larger household savings than LNG at lower cost.

What to watch:

• Whether the non-discrimination obligations from 1 July 2026 actually lower retail prices, or — as some economists warn — inadvertently raise them by reducing gentailers' incentive to invest in new generation.
• Whether the LNG import terminal (estimated above $1 billion, now to be funded by gentailers) is built and operational by 2028 as planned, and whether it meaningfully dampens winter price spikes.
• Hydro storage and gas-field decline heading into the 2026 winter — the Electricity Authority notes committed renewables meet demand growth but cannot reliably cover winter peaks without storage.
• The political landscape: with NZ First, Labour and the Greens all supporting gentailer reform in some form ahead of the 2026 election, structural change to the market looks increasingly likely regardless of which party leads government.

_Note: party and stakeholder positions above are attributed and paraphrased from named sources; this is a contested policy debate with credible expert voices on multiple sides._