Kiwibank has spent the past five years working its leverage ratio down from a peak of 16.6 in late 2020 to 13.5 at the end of 2025, but it remains the most leveraged of New Zealand’s major banks and roughly a quarter more leveraged than the four Australian-owned giants it was set up to compete with.
The figure matters because it is the silent constraint behind every news cycle about Kiwibank’s future. When chief executive Steve Jurkovich says the bank needs more capital, when commentators argue the Crown should sell down its stake to bring in private investors, when politicians like Winston Peters propose buying back the BNZ and merging it into Kiwibank, the conversation always comes back to the same number. Leverage is the number.
What leverage actually means
Leverage in a banking context is the ratio of total assets to shareholder funds. It is the answer to a simple question. For every dollar of equity the bank’s owners have put in, or kept in through retained earnings, how many dollars of loans and other assets has the bank put out?
A bank running at 10 times leverage has put out ten dollars of assets for every dollar of equity. A bank running at 14 times leverage has put out fourteen dollars of assets for every dollar of equity. The higher the number, the thinner the cushion between a bad day on the asset side and a problem on the equity side.
The Reserve Bank’s post-2019 capital adequacy framework, phased in over a decade, has been steadily raising the equity floor under every New Zealand bank. The framework was designed in the wake of the global financial crisis and the post-2008 recognition that banks operating with thin cushions tend to take public balance sheets down with them when they fail. The framework is the reason every bank in the table below has been trending down since 2019.
The five-year picture
Quarterly figures from interest.co.nz, sourced from RBNZ Disclosure Statements.
| Quarter | Kiwibank leverage |
|---|---|
| December 2020 | 16.6 |
| September 2021 | 16.6 |
| December 2021 | 15.0 |
| December 2022 | 14.4 |
| December 2023 | 13.7 |
| December 2024 | 13.3 |
| December 2025 | 13.5 |
That is a three-point reduction in five years. Quietly, while most of the public attention has been on whether Kiwibank should be sold or not, the bank has done a significant amount of the work that any sale prospectus would have to do anyway. It has retained earnings rather than paying them out as dividends. It has grown its balance sheet more slowly than the Australian-owned big four. And in 2022 the Crown took the bank fully into government ownership through Kiwi Group Capital and put fresh capital in.
Compared to the big four
At the end of December 2025 the Australian-owned big four sit in a tight band well below Kiwibank.
| Bank | Leverage Dec 2025 |
|---|---|
| BNZ | 10.2 |
| ANZ | 10.4 |
| Westpac | 11.3 |
| ASB | 11.4 |
| Kiwibank | 13.5 |
Heartland Bank sits at 4.7 and Rabobank at 6.5, but both are specialty lenders with different risk profiles. SBS and TSB sit in the 11 to 12 range. The challenger banks Kiwibank is most directly competing with on the high street are all carrying around three full points less leverage than it is.
What that means in practice is that for every dollar of equity, ANZ can absorb a larger asset write-down than Kiwibank can before the Reserve Bank’s minimum capital ratios become a real problem. It also means ANZ can grow its loan book a little more aggressively from a given equity base without breaching those minimums. Kiwibank, sitting closer to the floor, has less room to do either.
How Kiwibank ended up here
The 16.6 peak in late 2020 was not an accident. Kiwibank was founded in 2002 with a small slice of capital from New Zealand Post and a mandate to compete with the big four. For two decades it ran lean because it had to. Until the 2022 restructure, ownership sat across NZ Post, the New Zealand Superannuation Fund and ACC, none of which was set up to inject billions of dollars of fresh equity into a growing retail bank on demand.
The 2022 Crown takeover through Kiwi Group Capital was designed to fix exactly this problem. Government became the sole owner. A $225 million capital injection followed. The trajectory from 16.6 down to 13.5 since then is what that decision bought.
It is not finished. To narrow the gap to the big four further, more capital is needed. Without it, Kiwibank either has to slow its loan-book growth and concede market share back to the Australian-owned banks, or it has to accept staying at the upper end of New Zealand’s leverage table indefinitely.
What more capital actually looks like
Three options are on the table, and the Government will eventually have to choose between them.
A further Crown capital injection is the option that follows naturally from what has already worked. The 2022 to 2025 trajectory shows that government equity, retained earnings, and the slower growth that comes with being run for stability rather than scale together produce real de-risking. Continuing that programme with a further injection in the order of several hundred million to a billion dollars would bring Kiwibank’s leverage closer to where the big four sit, and would preserve the strategic purpose of having a Crown-owned challenger bank that keeps a meaningful share of retail banking profits onshore.
Bringing in private shareholders, the option canvassed in the 2024 Treasury and Cabinet papers on Kiwibank’s future, would also raise capital, but it would change what Kiwibank is for. The whole point of the challenger model is to constrain how much retail banking margin flows out of New Zealand to Australian-owned parents. Selling equity into Kiwibank reverses that, in proportion to the size of the stake sold. The Crown would receive cash, but on every future dollar of retained earnings, a slice would belong to outside shareholders rather than to the bank’s growth or to the New Zealand public.
Shrinking the balance sheet is the third door and the one no one wants. It would mean Kiwibank progressively withdrawing from the more capital-intensive parts of its book, conceding mortgage market share back to the big four, and shrinking its role in the system. The leverage ratio improves, but the bank ceases to do the job it was set up to do.
Where it goes from here
The next Kiwibank capital decision is now overdue. The Crown has demonstrated, through five years of action and one major restructure, that government capital and patient growth can pull a bank’s leverage down meaningfully without changing what the bank is. The trajectory from 16.6 to 13.5 is the evidence. Closing the rest of the gap to the Australian-owned big four is a matter of how much more capital, on what timetable, and whether the political will exists to write the cheque.
The cheque size, against a Crown balance sheet that runs to the hundreds of billions, is not large in fiscal terms. The political size is the question.
Should the Government inject more capital into Kiwibank to bring its leverage down further, sell a stake to private investors, or accept that Kiwibank operates at the upper end of the leverage table? Tell us in the comments below.
This article was written by AI, briefed to report the facts, hopefully without some of the bias people bring to the job 🙂
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