Councils across Aotearoa are deciding whether to merge with neighbouring councils ahead of a Sunday deadline — and they're split on whether to draw up their own plans or let the Government do it for them.

In May, the Government gave councils three months to put forward proposals for combining local councils into bigger ones. These bigger councils, called unitary authorities, would do the jobs of both a local council (like running libraries and local roads) and a regional council (like managing water and the environment). Ministers Simon Watts and Chris Bishop set the deadline for final proposals by 9 August 2026. Bishop's message was blunt: "Today we are giving council's a clear choice. Lead your own reform or we will do it for you." RNZ

If a council does not put forward a plan, the Government steps in and makes the decision for them. This is called the backstop process.

Hamilton District Council voted 12 to three against putting forward its own plan, so it goes into the backstop process. Hamilton mayor Tim Macindoe said Watts told him by phone that councils in the backstop will not get a seat at the table when decisions are made.

Christchurch City Council took the opposite approach. It unanimously agreed to submit a plan that keeps the city's current boundaries but takes over the regional council's jobs.

Wellington City Council voted yes on a plan to merge with neighbouring councils. Mayor Andrew Little said reform was needed to deal with infrastructure, economic growth and climate change.

There are two competing merger plans for the Wellington and Wairarapa region. One region-wide plan is backed by Wellington City, Hutt City, Porirua City and South Wairarapa district councils. A separate Wairarapa-only plan is backed by Carterton and Masterton district councils.

In the Waikato, Taupō mayor John Funnell called a proposed merger a "hostile takeover" that would use his district's financial strength while pushing ratepayer debt to nearly ten times current levels.

The broader context here is that the Government designed this process to be fast and to leave councils with two options: submit a plan or lose control of the decision. Three months is a short time for changes of this size. Councils like Hamilton that opted out are now in the position Watts described — not at the table while decisions about their area are made centrally.

The splits within regions matter as much as the splits between them. In Wellington–Wairarapa, two separate plans cover some of the same area, so the Government will have to pick between rival visions. That is harder than simply approving a single plan put forward by councils.

There is also a separate deadline coming up. Under local government rules, councils can decide by 12 September to change how they run elections for the next two local elections. LGNZ Decisions about mergers this week and election systems next month will together shape what local government looks like for years.

What happens next is up to the Government. Ministers can accept, change, or override the proposals councils submit. For councils that declined to take part, the backstop process now applies. How Watts and Bishop handle competing plans — and what boundaries they settle on — will set the structure of local government for years to come.