NZ: Deposit Takers (Capital) Standard 2027¶


Regulator	RBNZ
Jurisdiction	NZ
Status	Draft — not yet in force
Applicability	Platform

RBNZ's capital standard under the Deposit Takers Act 2023, replacing BS2A and BS2B. It prescribes minimum capital ratios (CET1, Tier 1, Total Capital), risk-weighted asset calculation methods, capital buffers (conservation, countercyclical, D-SIB), and ICAAP requirements. Deposit takers must hold capital commensurate with their risk profile. Full implementation is phased to 2028.

DRAFT — Tranche 3 exposure draft expected June 2026. Standard takes effect 1 December 2028. Current capital obligations are governed by the predecessor standards (BS2A, BS2B) until that date.

IRRBB (interest rate risk in the banking book) is incorporated into this standard as a Pillar 1 capital requirement, replacing the former standalone IRRBB Standard. IRRBB applies to all locally-incorporated deposit takers (G1–G3) with proportionate methodology by group. Section references are indicative — refer to the exposure draft as published by RBNZ.

Compliance register¶

This register maps every material obligation under the standard to the platform control or institutional process that satisfies it. It is the static traceability layer for the Totara compliance report — dynamic data (module build status, test evidence, control test dates) is overlaid at runtime.

Scope legend¶

Symbol	Meaning
🤖 Automated	Platform enforces or performs the obligation. Primary control mode is GATE, AUTO, CALC, or ALERT. Human action is not required in the normal case.
📊 Evidenced	Platform captures the evidence trail automatically. Human compliance decision sits on top. Primary control mode is LOG.
🏛 Institutional	Obligation is met by a process entirely outside the platform — board governance, treasury, legal. Platform may generate evidence inputs but does not own the process.
N/A	Obligation does not apply to this deployment configuration.

Build legend¶

Symbol	Meaning
✅	Module built and deployed
🔨	Module planned — not yet built (`build_status: Not started`)
❌	Uncontrolled gap — no module attributed

Capital ratios and RWA¶

Ref	Obligation	Scope	Policy	Platform controls	Build
Minimum CET1	Maintain CET1 ratio at or above minimum (4.5% minimum plus Capital Conservation Buffer of 2.5%, giving 7.0% effective floor for large banks)	🤖 Automated	CLQ-005, GOV-002	MOD-033 (CALC) — CET1 and total capital ratios computed from live exposure data against current RWA; no manual risk weight application; MOD-033 (ALERT) — breach of minimum CET1 threshold triggers automatic board notification	🔨
Total capital minimum	Maintain Tier 1 and Total Capital ratios at or above prescribed minimums	🤖 Automated	CLQ-005, GOV-002	MOD-033 (CALC) — total capital ratio computed continuously; ratio breaches generate automatic alerts; single source of truth for internal monitoring and regulatory returns	🔨
RWA calculation	Calculate risk-weighted assets across credit, market, and operational risk using prescribed methodology	🤖 Automated	CLQ-005, REP-002	MOD-033 (CALC) — RWA computed from live exposure data; credit risk ratings from scoring engine map to Basel risk weights; APRA ARS / RBNZ returns populated from the same engine — no reconciliation gap	🔨
Capital Conservation Buffer	Maintain CCB of 2.5% CET1 above minimum; restrict distributions if buffer breached	🤖 Automated	CLQ-005, GOV-002	MOD-033 (CALC) — CCB headroom tracked continuously; ALERT raised when distribution would breach buffer; MOD-033 (ALERT) — automatic escalation on breach	🔨
Countercyclical Capital Buffer	Maintain CCyB at RBNZ-set rate (0–2.5%); rate changes applied within prescribed timeframe	🤖 Automated	CLQ-005	MOD-033 (CALC) — CCyB rate is a configuration parameter applied automatically to ratio calculations on RBNZ notification	🔨
Capital Disclosure	Report capital ratios in prudential returns and public disclosures	🤖 Automated	CLQ-006, REP-002	MOD-033 (CALC) — Pillar 3 disclosure figures sourced from the same RWA engine; no reconciliation gap between internal monitoring and external reporting	🔨

ICAAP¶

Ref	Obligation	Scope	Policy	Platform controls	Build
Annual ICAAP	Conduct and document an annual Internal Capital Adequacy Assessment Process and submit to RBNZ	📊 Evidenced	CLQ-005	MOD-034 (CALC) — ICAAP stress test section populated from the stress scenario engine; no manually assembled spreadsheet; MOD-033 provides live capital ratios as the ICAAP base data	🔨
Stress testing	Include forward-looking stress scenarios in ICAAP; model capital adequacy under severe but plausible scenarios	🤖 Automated	CLQ-005, GOV-002	MOD-034 (CALC) — stress test outputs documented and auditable; scenario inputs, model version, and results all logged; RAF threshold breach scenarios identified automatically	🔨
Capital plan	Maintain a board-approved capital plan reviewed annually	🏛 Institutional	CLQ-005	Board approval and annual review are institutional governance processes. MOD-034 and MOD-033 provide the data inputs for the capital plan document; plan authorship and board sign-off are outside platform scope.	—
Risk appetite for capital	Document board-approved risk appetite thresholds for capital metrics	🏛 Institutional	GOV-002	MOD-150 (CALC) — RAF dashboard computed continuously from SD06 outputs; RAF threshold breach auto-alerts CRO and Board Risk Committee chair. RAF threshold values are set by the board and configured in the platform; board approval of the RAS is institutional.	—

Institutional obligations (not platform scope)¶

The following obligations under the standard are the responsibility of the institution, not the platform.

Obligation	Owner	Platform evidence input
Board approval of capital plan and ICAAP	Board / Chief Risk Officer	MOD-034 and MOD-033 provide data inputs; board approval is an institutional governance act
RBNZ supervisory engagement on capital adequacy	Chief Risk Officer / Chief Financial Officer	MOD-033 and MOD-034 provide examination-ready data extracts
D-SIB surcharge assessment and ongoing compliance	Chief Financial Officer	MOD-033 tracks total capital including any surcharge buffer; surcharge rate is set by RBNZ
Annual board attestation to RBNZ on capital governance	Board	MOD-150 provides the risk dashboard board report data inputs

Coverage summary¶

Area	Total obligations	Platform automated 🤖	Platform evidenced 📊	Institutional 🏛
Capital ratios and RWA	6	6	0	0
ICAAP	4	2	1	1
Total	10	8 (80%)	1 (10%)	1 (10%)

Of the 9 platform obligations, all have attributed controls. All attributed modules are currently build_status: Not started — the compliance position will update as modules are built and deployed.

Policy	Title
CLQ-005	Internal Capital Adequacy Assessment Process (ICAAP) Policy
CLQ-006	Capital Disclosure & Reporting Policy
GOV-002	Risk Appetite Statement Policy
REP-001	Regulatory Reporting Policy
REP-002	Prudential Reporting Policy

See D01 Capital & Liquidity for the full risk domain.

Official documentation¶

Policies referencing this standard¶

CLQ-004 — Interest Rate Risk in the Banking Book (IRRBB) Policy
CLQ-005 — Internal Capital Adequacy Assessment Process (ICAAP) Policy
DT-005 — Model Risk Management Policy
DT-013 — Model Validation & Audit Policy
GOV-002 — Risk Appetite Statement Policy
REP-001 — Regulatory Reporting Policy
REP-002 — Prudential Reporting Policy

Compiled 2026-05-22 from source/entities/regulations/nz-dta-capital.yaml