The 440,000 adults who vanished
Start with the number that does not work. The Opportunities Party’s own policy document puts the cost of its flagship Citizens’ Income at $69.6 billion. At the party’s proposed $19,400 per adult, that figure only holds if there are 3.66 million adults in New Zealand. Statistics NZ puts the actual 18-plus population at roughly 4.1 million.
Auckland business owner and Stuff columnist Damien Grant did the sum properly and got about $80 billion gross – a gap of some $10 billion TOP has never explained. His question was blunt: “Did they assume no one would check?”
This is not one grumpy columnist. Good Oil’s independent analysis, working from Stats NZ’s December 2025 count of 4,161,400 adults, reaches a gross cost of $80.731 billion and a net cost after tax clawback of $20.438 billion, well above TOP’s own 2024 costing of $15.788 billion. A separate May 2026 analysis by Good Ideas NZ flagged the same problem, noting roughly 900,000 adults unaccounted for. Three independent checks, one conclusion.
The revenue side is shakier still
The Citizens’ Income is meant to be funded largely by a land value tax of 1.75% on urban land and 0.5% on rural land, which TOP says raises $24 billion off assumed land values of $1.4 trillion.
That does not stack up either. The Reserve Bank estimates total residential property at $1.6 trillion. Since land is roughly half of that, a 1.75% tax on residential land raises about $12 billion. For the $24 billion figure to work, commercial and rural land would have to be worth two or three times all residential land combined – implausible when urban land commands a large premium per square metre. The base is even softer than that: retirees can defer the tax until death, and TOP itself concedes the policy reduces land values, shrinking the very base it taxes.
For a business owner, the concrete edge is this: a million-dollar New Plymouth house with $500,000 of land value would face an $8,250 annual land value tax on top of existing rates.
This is not just a TOP problem
Here is why the story matters beyond a party that has never made Parliament. Independent economist Cameron Bagrie told Newsroom on 3 July that “I do not believe any party’s numbers will add up. We live in a world of promise-me-nomics.”
The major parties fund pledges from baselines and operating allowances that do not yet exist. National’s KiwiSaver pledge runs to $1.14 billion over four years; Labour’s apprenticeship scheme leans on future money. The history is worse: in 2020 Paul Goldsmith miscalculated Super Fund contributions by $4.3 billion, and in 2017 Steven Joyce claimed a disputed $11.7 billion fiscal hole in Labour’s plans.
Oliver Hartwich put the standard plainly in June 2026, writing that “parties that want our votes owe us their workings, not just their answers.” His verdict on one costed-looking announcement that turned out to hinge on undisclosed variables was that “it was a press release, not a serious policy.”
Why the arithmetic matters now
This is not an academic exercise. Treasury’s May 2026 Budget update forecasts net core Crown debt hitting $216.5 billion, or 45.6% of GDP, in 2026/27, an operating deficit of $11.9 billion for the prior year, inflation peaking near 4.0% and unemployment at 5.5%. A $10 billion gap between claimed and real cost is not a rounding error in that environment. It is the difference between a fundable policy and a structural deficit that eventually lands on taxpayers and businesses as higher taxes or cut spending.
New Zealand has no Parliamentary Budget Office to referee these numbers before an election. That means the burden of scepticism falls on you. Businesses allocating capital, hiring, and pricing risk over the next two to three years cannot assume a headline costing survives contact with a calculator. Run the sums yourself, discount the promises that do not add up, and treat any pledge with a missing 440,000 people as exactly what it is. November will not wait for the workings.
Sources
- Damien Grant: The maths behind TOP’s biggest promise falls apart (2026-07-05)
- A Look at TOP’s Citizen’s Income Policy (2026-06-30)
- ANALYSIS: How does the Opportunity Party’s big tax-and-welfare rethink stack up? (2026-05-08)
- Here’s how Willis and Edmonds will really dodge the fiscal potholes along the campaign trail (2026-07-03)
- A press release is not a policy! (2026-06)
- Budget Economic and Fiscal Update 2026 (2026-05-28)
- Duncan Garner: TOP’s centrist label is a lie voters must see through (2026-07-02)