Wellington households will be hit with a new standalone water bill from 1 July, adding an average of $200 a month to their expenses as a new water entity takes charge of the region's troubled network. This figure is projected to rise to $566 a month within the next ten years.
The new entity, Tiaki Wai, will take over the management of drinking water, wastewater, and stormwater services from Wellington Water for Wellington City, Porirua, and the Hutt Valley. The move will see households billed directly for water for the first time, separate from their council rates.
On Wednesday, Tiaki Wai is set to release its water services strategy, outlining a future of sharp price increases needed to address what it calls "decades of underinvestment". While the average household currently pays around $2100 a year for water through their rates, the new direct charges will add an estimated $310 to that annually, bringing the total to about $2410, or roughly $200 per month.
A decade of price hikes
The financial pressure is not set to ease after the initial adjustment. Tiaki Wai is already forecasting a further 28% price rise in its second year of operation, although this has not yet been confirmed. Following that, residents can expect compounding annual increases of between 8.9% and 14.4% through to 2035.
These steep, compounding hikes mean that the current $2100 annual cost for water services will balloon to $6831 within a decade, equivalent to a monthly payment of $566. The new charges will be linked to property values, meaning those in higher-value homes will face a larger bill. The bills will be issued to the ratepayer or property owner, not tenants.
Although councils will reduce their rates to reflect the removal of water services, this will provide little comfort for homeowners. In Wellington City, rates are expected to drop by about 29% before other annual increases are factored in. For an average home in Hataitai currently paying $6101 in rates, this would lower the bill to $4332. However, with a separate 7.4% rates increase also planned, the new council bill will be closer to $4643. When the new average annual water charge is added, the total combined cost for rates and water will be $7053, leaving the homeowner almost $1000 worse off each year.
Cost pressures mount for residents
The water price shock arrives at a difficult time for the capital, which is grappling with a number of economic headwinds. Residents are already facing a severe cost of living crisis, steep rates rises in recent years, and now a new targeted charge. The financial burden is compounded by a shrinking population available to share the costs.
We are conscious that everyone has been facing rising costs on all sides and any increase is challenging. But we have to develop a plan to tackle the big water services challenges and people will see the significant increase in investment set out in this plan over the next decade.
Tiaki Wai chairperson Will Peet acknowledged the financial strain the new charges would cause. "We are conscious that everyone has been facing rising costs on all sides and any increase is challenging," Peet said. "But we have to develop a plan to tackle the big water services challenges and people will see the significant increase in investment set out in this plan over the next decade."
Paying for crumbling infrastructure
The changes are driven by the government's ‘Local Water Done Well’ policy, which separates water assets from council control to allow for greater borrowing capacity to fund essential upgrades. According to Tiaki Wai, the investment is urgently needed to get on top of an ageing and failing network.
The new entity will inherit four wastewater treatment plants, three of which are already non-compliant with regulations, with some issues stretching back "many years". The network's vulnerability was highlighted on 4 February when the Moa Point wastewater plant was severely damaged. Tiaki Wai has acknowledged that the urgent and costly repairs required at Moa Point "may divert planned investment in other areas of the wastewater network", potentially delaying other critical projects.
This legacy of failing infrastructure has been a long-standing issue for the region, with reports as early as 2020 identifying a massive shortfall in funding for Wellington's pipes. The new model, as explained by the Department of Internal Affairs, is designed to provide the focused, long-term investment required to prevent further degradation of these essential services.
Future billing and payment relief
Amid concerns about affordability, Peet gave a firm guarantee that no household would have its water supply disconnected due to an inability to pay the new charges. The organisation has yet to detail what payment assistance programmes will be available.
A potential path to more equitable billing is on the horizon, with plans to roll out water meters across the entire region. This would allow households to pay for the volume of water they use, rather than a flat charge tied to property value. However, this is a long-term project, with the deployment of meters scheduled to begin in 2028 and expected to take five to seven years to complete.
The indicative cost for the meter installation programme is substantial, estimated to be between $500 million and $590 million. Until meters are operational, all households will continue to pay the set charge, regardless of their individual water consumption.
