Wellingtonians told to expect $200-a-month water bill rising to $566 within the decade
Wednesday, 25 March 2026
An average Wellington household will soon face a new monthly $200 charge – rising to $566 within the decade – to keep the taps flowing and toilets flushing.
On July 1 Tiaki Wai takes over the running of Wellington, Porirua, and Hutt Valley’s three waters – tap, waste and storm – from Wellington Water.
On Wednesday it will release its water services strategy showing that the average household across Wellington City, Porirua and Hutt Valley now pays about $2100 a year for water, albeit via rates. Come July 1, this will be a standalone bill and an average of $310 would be added.
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That works out to about $2410 per household each year - roughly $200 a month. A year later, the new entity was forecasting a further 28% rise, though that increase had not yet been confirmed. From there, annual hikes of between 8.9% and 14.4% are expected through to 2035.
The compounding future increases will put that $2100-a-year bill up to $6831 within the decade, or $566 a month.
The incoming price shock couldn’t come at a worse time for Wellington, arriving amid a global fuel crisis, years of steep rates rises, another 7.4% increase in the pipeline, a shrinking population to spread costs across, and high unemployment.
The charge - which varies between councils - is partly linked to house values, meaning higher-value homes will pay the most. The bill will be issued to current ratepayers rather than the people living in the house.
The change from Wellington Water to Tiaki Wai, necessitated by the Government’s Local Water Done Well policy, allows the new entity to borrow more to get on top of ageing and failing infrastructure but means it will charge households directly.
Water is currently paid for by councils, which get most of their income from rates. This should mean a reduction in council rates – about 29% in Wellington City before annual plan increases are included – in July.
Council figures show an average Hataitai home is currently paying $6101 in rates. The July 1 decrease will drop the bill to $4332 but the expected 7.4% rates increase will take the new total to $4643.
The added water charge will take the combined total to $7053 – making home owners almost $1000 worse off a year.
Tiaki Wai chairperson Will Peet said the organisation was paying for “decades of underinvestment”.
“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.”
He guaranteed nobody would have water turned off if they couldn’t pay.
One way households will eventually be able to reduce their water bills is through the rollout of water meters across the region, allowing people to pay for what they use.Deployment is scheduled to being in 2028 and take five to seven years to complete. The indicative cost to install them is between $500 million and $590m.
The strategy shows Tiaki Wai will be taking over four wastewater plants, three of which are non-compliant with some issues going back “many years”. The Moa Point plant was severely damaged on February 4 and Tiaki Wai has acknowledged work to fix that “may divert planned investment in other areas of the wastewater network”.