No party has asked why Treasury is sitting on $15.6 billion it doesn’t need

The Crown Settlement Account, the Government’s main bank account at the Reserve Bank, held $25.61 billion at the end of September. Treasury’s own minimum liquidity target is $10 billion. That leaves $15.61 billion above requirement, more than eight times the cost of the new Dunedin Hospital. The University of Otago researchers who obtained the daily data under the OIA put it bluntly: why the account is held so far above target “has never been publicly explained”.

Any business owner knows what this is. It is idle working capital, and it is not free.

Cash that costs more to hold than it earns

The Government borrows by issuing bonds, with five-year yields at 4.40% in mid-October, then parks the proceeds at the Reserve Bank earning roughly the 2.75% Official Cash Rate. On a $15.6 billion excess, that spread costs an estimated $260 million to $340 million a year in net interest.

To be precise about what this is not, drawing down the cash instead of issuing new bonds would not change net debt. This is not a hidden pot for election promises. It is a straightforward interest saving, the kind any CFO would chase without needing a board paper.

A target that keeps falling while the balance doesn’t

The excess is not a one-off. According to the researchers, the account has averaged $27.8 billion a day since 2021, has not dropped below $14 billion at any point in that period, and has averaged more than $25 billion since 2024. Treasury lifted its buffer from $2 billion to $15 billion in 2021 amid Covid uncertainty, promised to run the balance down from over $40 billion by mid-2023, and still held $21.12 billion when that date arrived. In 2023, BNZ’s markets team assumed the balance was already forecast to decline over time. It didn’t. The target was cut again to $10 billion in 2025, and the actual balance carried on regardless.

Treasury’s explanation is a $16 billion bond repayment due in April 2027. That is a legitimate reason to hold some extra cash in the months ahead of it. It does not explain five years of elevated balances, and New Zealand’s buffer is already built conservatively, to cover four to six weeks without tapping the bond market.

The drift also runs against the wider system. Back in 2024, then-Reserve Bank Assistant Governor Karen Silk signalled the end of the “abundant” cash era for banks, warning participants would need to manage their own liquidity more tightly. The Crown’s own account never got that memo.

The overdraft that isn’t one

Part of the caution may be optics. Nobody wants a headline saying the Government dipped into overdraft. But the facility attached to the account, currently $5 billion, is closer to a timing tool than a distress signal, because Parliament has already authorised the spending. A 2014 Treasury paper released under the OIA found the Reserve Bank was “very comfortable” with its use for cash-flow smoothing. The researchers want the word retired in favour of a “timing-of-payments facility”. Fair enough. Paying hundreds of millions a year to avoid an unflattering label is poor value.

Same scale as the numbers parties are fighting over

Finance Minister Nicola Willis says a forecast $4 billion surplus is “not the time to spend up big or give a green light to open the cheque book”. National accuses Labour of an $18.8 billion funding hole, which Labour disputes. The improved outlook means the Government plans to borrow $15 billion less over four years.

Those are the same orders of magnitude as the idle balance, and the backdrop is not comfortable. Net core Crown debt sat at $186.8 billion, or 40.9% of GDP, at 30 June. Budget 2026 forecast a $24.2 billion residual cash deficit for 2027 alone. In 2025, economist Cameron Bagrie wrote that New Zealand was “living beyond our means”, and Iain Rennie, Treasury Secretary at the time, said the Crown would not “grow our way out of the fiscal deficit” and needed changes across the balance sheet.

Treasury floated asset sales then. Tightening cash management is a far easier balance-sheet fix, and it is politically painless.

The question every party should answer

This is not a National problem or a Labour problem. The buffer swelled under the last government and has stayed swollen under this one. That makes it a rare clean test of fiscal discipline, and so far no party has addressed it.

Before polling day, every major party should say whether it would direct Treasury to run the account toward its own $10 billion target once the April 2027 repayment clears, and what it would do with an interest saving worth up to $340 million a year. If the answer is to leave things as they are, voters deserve the reason. A business holding $15 billion of cash it said it didn’t need would be asked that question by its auditors. The Crown should face it from the people paying the interest.

Sources

• Newsroom: Campaign Cut-through: The $15.6 billion Treasury doesn’t need (2026-11-03)
• Economic News NZ: Treasury Holds $15.61bn Excess at Crown Settlement Account (2026-11-04)
• BNZ: Markets Outlook – Research (2023-09-11)
• interest.co.nz: RBNZ says the era of ‘abundant’ cash is over (2024-10-23)
• RNZ: What the government’s $4b surplus means for the election (2026-09-30)
• NZ Herald: Election 2026: Labour’s fiscal plan has many questions to answer (2026-10-02)
• Treasury: Fiscal Strategy Report – Budget 2026 (2026-05-28)
• BusinessDesk: An alternative to asset sales: outsourcing their management (2025-11-11)
• NZ Herald: Treasury pushes for asset sales as it rings alarm bells over state of Government’s finances (2025-11-07)