Cabinet's Economic Policy Committee has formally authorised public consultation on a prudential levy to shift Reserve Bank supervision costs onto banks, insurers and market infrastructure operators from 2027/28.

The Cabinet Economic Policy Committee on 5 August 2026 agreed to release the consultation document Prudential Levy under the Reserve Bank of New Zealand Act 2021. The minute, ECO-26-MIN-0146, was published by the Treasury on 18 September 2026.

Cabinet noted Budget 2026's in-principle decision, subject to industry consultation, to introduce a levy recovering the costs of the Reserve Bank of New Zealand's prudential functions. That earlier decision is recorded as CAB-26-MIN-0156.

The committee authorised a ten-week consultation from August through October 2026. It invited Finance Minister Nicola Willis to report back in early 2027 with outcomes and final policy decisions.

The Reserve Bank is running the process on the Minister's behalf under section 296 of the RBNZ Act 2021. Consultation opened on 11 August 2026. Submissions close at 5pm on 16 October 2026.

The Reserve Bank of New Zealand is running the prudential levy consultation on behalf of the Minister of Finance under section 296 of the RBNZ Act 2021.

Dollar path and who pays

Budget 2026 materials estimate the levy will recover around $209 million over four years. Treasury's Stage 1 Cost Recovery Impact Statement, finalised 11 May 2026, puts GST-exclusive prudential costs at $68.1 million to $72.4 million in FY2027/28, depending on the allocation method, then rising with 2% inflation.

Under allocation method 1, indicative totals are $68.1m in 2027/28, $69.5m in 2028/29 and $70.9m in 2029/30. Method 2 is higher: $72.4m, $73.8m and $75.3m.

Indicative prudential cost path by allocation method
Method 1 and Method 2 differ in how overhead is allocated across RBNZ prudential functions.
Source: Treasury Stage 1 Cost Recovery Impact Statement, May 2026

Consultation materials reported by interest.co.nz and BusinessDesk allocate about 54% to deposit takers, 39% to insurers and 7% to financial market infrastructures over a three-year $209 million path. The CRIS preliminary split, based on frontline supervisor shares, was 50%/35%/15%.

Indicative CRIS tables show Group 1 deposit takers — four domestic systemically important banks — bearing about $29.8 million in total, or roughly $7.4 million each on average. Branches would face a lower assets-based rate. Designated insurers would carry most of an indicative $24.5 million insurer total.

Interest.co.nz reporting of the consultation paper put ANZ New Zealand, with about $219 billion in March assets, near $10 million a year. BNZ, ASB and Westpac New Zealand would each pay several million. Kiwibank would pay less. IAG New Zealand could face more than $5 million.