What $1.5 Billion Could Have Done to Fix New Zealand’s Bank Problem
The first article in this series set out the headline arithmetic. The four Australian-owned banks operating in New Zealand earned more profit in 2024 than the entire rest of the Deloitte Top 200 combined. The second article showed why. New Zealand subsidiaries earn higher returns on capital than their own Australian parents, year after year, and sit in the upper quartile of developed-country banking returns globally.
That leads to the obvious follow-up. If the structural problem is so clearly identified, what would it take to fix it, and why hasn’t it been fixed already?
The Commerce Commission’s 2024 personal banking market study answered the first half of that question. The fix is to turn Kiwibank into a genuine disruptor — large enough to discipline Big Four margins, capital-rich enough to lend competitively, and visible enough that ordinary borrowers actually consider switching. The Commission used the phrase “disruptive maverick.” Treasury endorsed the same direction. So did the Reserve Bank, in more guarded language.
The capital required to get Kiwibank to that scale is well documented. Treasury’s own advice put the figure at roughly $2 to $3 billion of additional equity over the next decade. The most recent attempt at a capital raise was $500 million from New Zealand institutional investors, approved by the current government in July 2025 and then quietly scrapped in early 2026 after the Reserve Bank partially eased capital settings. The bank has instead leaned on cheaper Tier 2 bond funding, which doesn’t count as core equity and can’t fund the same scale of growth.
This is the gap. Kiwibank needs around $2 billion of new equity to credibly threaten Big Four margins. Successive governments have struggled to find a fraction of that.
The money was there
Set the scale aside for a moment and look at what was spent on structural reorganisations during the previous government’s six years in office. Several of those programmes have since been substantially repealed, wound back, or quietly reabsorbed into existing departments — which is the cleanest possible test of whether the spend produced lasting value.
The Three Waters programme. The Department of Internal Affairs spent roughly $1.2 billion on the Three Waters reform programme between mid-2020 and late 2023. A portion of that went to councils as transition support, but a substantial slice was pure programme overhead — consultants, contractors, communications, restructuring costs, and a centralised Water Services Entities establishment effort that was scrapped in November 2023 when the National-led government repealed the reforms. The Herald’s investigation, drawing on DIA’s own figures, found that consultant and contractor spend alone passed $50 million by early 2023, with Ernst & Young alone receiving $5.2 million. The water assets the programme was meant to consolidate are still sitting where they always sat. Conservatively, $400 to $600 million of that programme spend is fairly described as bureaucratic overhead that delivered no lasting infrastructure.
Te Aka Whai Ora structural overhead. The Māori Health Authority operated for two years before being disestablished in mid-2024. Its standalone operating cost was around $35.5 million a year, or roughly $70 million across its lifespan. This figure is separate from the actual Māori health service funding, which has continued and now sits inside Health New Zealand — the underlying clinical work was not the cost being criticised, the duplicate institutional layer was.
The Public Interest Journalism Fund. $55 million was earmarked over three years from 2021 to 2023 and disbursed through NZ On Air. The fund has now closed and was not renewed. Reasonable people can disagree about whether it produced lasting public value, but it was a discrete and identifiable spend that ended without a permanent institution behind it.
Diffuse structural and consulting overlays. Across the wider public service between 2017 and 2023, headcount grew by roughly 19,000 full-time equivalents. Much of that was unavoidable — frontline housing, mental health, and Ministry of Social Development capacity that any government would have funded. But a meaningful slice was structural overlay work, equity teams, cultural consulting, and parallel-process consultants, much of which has since been trimmed. Best estimates of the discretionary structural component sit somewhere in the $300 to $500 million range across the term.
Taken together, the conservative tally of identifiable structural spend that has since been substantially wound back or that produced no enduring institutional asset comes to roughly $1.5 billion across the six years.
That is — almost exactly — the equity injection Kiwibank needs to become a credible competitive threat to the Big Four.
What $1.5 billion at Kiwibank actually buys
Equity in a bank is not consumed. It is leveraged. Under New Zealand’s current capital settings, $1.5 billion of additional core equity at Kiwibank would support roughly $10 billion of new home lending or roughly $4 billion of new business lending, depending on the mix.
Kiwibank’s total lending today sits at $37.6 billion. A $1.5 billion equity injection would have allowed it to grow that book by 25 to 30% in a single step — not over a decade, in one move — and to do so at margins that would visibly compress Big Four pricing. The flow-on effect on the Big Four would be measurable. Even a one percentage point compression of the Big Four’s net interest margin returns approximately $1 billion a year to New Zealand borrowers and depositors. Indefinitely. Compounding through the economy.
That is the asymmetry that makes capital investment fundamentally different from programme spending. Programmes are consumed in the year they’re delivered. Capital compounds. A dollar spent on a consultant in 2022 is gone. A dollar of equity invested in 2022 is, on conservative banking-sector returns, worth roughly $1.80 by 2026 and is still on the balance sheet earning a return for the country thereafter.
The political bind
None of this is to argue that the underlying purposes of those structural programmes were wrong. The Three Waters reform was responding to a real problem — council water infrastructure that successive central governments have failed to fix for decades. Te Aka Whai Ora was responding to a real problem — persistent gaps in Māori health outcomes that mainstream system delivery has not closed. The Public Interest Journalism Fund was responding to a real problem — the collapsing economics of regional and investigative journalism. The intent was not the issue.
The issue is that none of those programmes built a durable institutional asset that survives a change of government. They were structural overlays on existing systems — fragile by design. When the political weather changed, they were dismantled, and the spend went with them. The water pipes still leak. Māori health outcomes still lag. Local journalism is still struggling. And the country is no closer to solving any of them, because the chosen vehicles were vulnerable to repeal.
An equity injection into Kiwibank is the opposite kind of asset. It cannot be repealed. It sits on the bank’s balance sheet, generating returns for the Crown shareholder year after year, regardless of which party holds the Treasury benches. It would have helped Māori borrowers, regional borrowers, small businesses, and ordinary mortgage-holders — everyone, including the constituencies the original programmes were designed to serve, because the channel through which it works is universal price competition rather than tagged service delivery.
That last point is worth dwelling on. A more competitive banking sector lowers borrowing costs for every household in the country, including the ones the previous government most wanted to help. The mechanism is simply more democratic and more durable than running a parallel institutional structure for a few years before it gets dismantled.
The forward question
This is a strategic critique, not a partisan one. The current government is not noticeably more inclined to put the equity in than the previous one was. Cabinet’s approved $500 million capital raise — a quarter of what the bank actually needs — was scrapped within nine months when the Reserve Bank’s partial easing offered an excuse to defer. A future government of either colour will face the same choice and is likely to defer in the same way, because the political cost of writing the cheque is high and the political reward is delayed by a decade.
The country has the money. It has had the money in every budget for the past decade. What it doesn’t yet have is a government willing to recognise that capital invested in a domestic competitive disruptor is a more durable and more democratic use of public funds than the rolling sequence of structural reorganisations that have absorbed equivalent sums and left no enduring asset behind.
Until that changes, the Big Four will keep earning around $6.5 billion a year in this country, and roughly $5 billion of it will keep leaving for Sydney and Melbourne. The maths doesn’t get any kinder the longer the decision is deferred. Capital that compounds against you is harder to catch the longer you wait.
Sources — NZ Herald, Three Waters $1.2 billion spend; NZ Herald, Three Waters consultant spending; Te Aka Whai Ora Annual Report 2023-2024; NZ On Air, Public Interest Journalism Fund close-out; Treasury Cabinet Paper ECO-25-SUB-0105 on Kiwibank capital options; RNZ, Kiwibank scraps $500m capital raise; Commerce Commission Personal Banking Market Study 2024.
Read the rest of this series — Part 1 on the headline profit arithmetic and Part 2 on returns on capital.
What do you think? Should the next government commit to a serious Kiwibank equity injection, or are there better uses for $1.5 billion of public money? Drop a comment below.