Electricity Authority probes price increases

New Zealand’s electricity sector is facing increased regulatory scrutiny as power prices rise ahead of winter, placing additional pressure on households and raising broader questions for businesses about cost predictability and market dynamics.

The Electricity Authority Te Mana Hiko (the Authority) has formally requested more detailed information from power companies to better understand the drivers behind recent price increases and whether further rises are likely in the coming months.

The move comes as most households face average electricity price increases of around 8% this year, following a similar rise in 2024. The latest changes, which largely took effect on 1 April, vary significantly depending on location and retailer, ranging from 1% to 11%.

For context, a household with a monthly power bill of $200 could see costs increase by approximately $16 per month — a meaningful jump at a time when many New Zealanders are already managing cost-of-living pressures.

What’s Driving the Increase?

While electricity pricing is influenced by multiple factors, including retailer pricing strategies, plan structures and regional differences, a significant portion of the latest increase is linked to rising network (lines) charges.

These charges, which the Commerce Commission regulates, account for roughly half to two-thirds of the current price increases. However, the Authority has signalled it wants greater visibility into what other factors may be contributing.

To that end, it has requested detailed data from power companies with a market share of more than 1%, indicating a more proactive stance on monitoring market behaviour.

“We know line charges are increasing this year, but we want to understand what else may be pushing prices up,” says Andrew Millar, General Manager Retail and Consumer at the Authority. “We’ll assess the information closely and follow up if anything appears unusual or unexpected.”

Implications for businesses

Although the immediate impact is being felt by households, rising electricity costs also carry implications for the business sector — particularly for energy-intensive industries and organisations with tight operating margins.

Key considerations include:

Cost pressures: Sustained increases in electricity prices can directly affect operating expenses,
Budget uncertainty: Variability across regions and providers makes forecasting more complex,
Supplier strategy: Businesses may need to reassess energy contracts and procurement strategies to manage exposure.

Increased focus on competition and consumer outcomes

While the Authority does not directly set electricity prices, it plays a central role in shaping market conditions. Its current actions reflect a broader effort to improve transparency, competition and long-term system efficiency.

One recent initiative is the launch of Billy, a new comparison and switching platform designed to help consumers and businesses identify more competitive power plans. More than 96,000 users have already engaged with the platform since its release.

Looking ahead, further regulatory changes are planned:

Mandatory off-peak pricing plans: From October, large power companies will be required to offer plans with lower rates for off-peak electricity use.
Clearer billing: All retailers will need to present power bills in a simpler, more transparent format.
Proactive plan reviews: Retailers will be expected to regularly check that customers are on the most suitable plan available.

A market in transition

The Authority’s intervention highlights a market in transition, as regulators seek to balance affordability with the need for ongoing investment in generation and infrastructure.

“We’re focused on ensuring the electricity system delivers for New Zealanders,” says Millar. “That means promoting competition, encouraging investment in new generation, and improving efficiency across the system.”

For businesses, the message is clear: energy costs are likely to remain an area of both risk and opportunity. Proactive management, from reviewing plans to optimising energy use, will be increasingly important as the market evolves.