Capital Adequacy for Australian ADIs: What You Need to Know in 2026

Capital adequacy is the foundation of prudential regulation for Australian authorised deposit-taking institutions. The question APRA is always asking is simple: if your borrowers default, your assets fall in value, or your funding dries up overnight, do you have enough capital and liquidity to absorb the shock without threatening depositors or triggering contagion across the financial system?

Australia's framework is built on the Basel III international standards but APRA has historically applied them more conservatively than most jurisdictions. That conservatism intensified after the 2019 Financial System Inquiry response, when APRA formally adopted its unquestionably strong benchmark — a policy commitment that Australian major banks should hold capital in the top quartile of international peers. For compliance teams, this means the minimums in the APS standards are rarely the real target. APRA's benchmarks, stress testing expectations, and supervisory guidance layer on top.

This guide covers the full capital adequacy framework: APS 110 (Capital Adequacy), APS 112 (Capital Adequacy — Credit Risk), APS 210 (Liquidity), the ICAAP process, and the common gaps GoComply identifies when scanning capital adequacy policies and frameworks.

The Capital Framework at a Glance

APRA's capital framework for ADIs is structured in layers, each serving a distinct purpose in the loss-absorption hierarchy. Understanding these layers is essential before diving into the individual standards.

Minimum Requirements and Buffers

The headline ratios under the Basel III framework as implemented in Australia are:

• Common Equity Tier 1 (CET1) — minimum 4.5% of risk-weighted assets (RWA). CET1 is the highest quality capital: ordinary shares, retained earnings, and reserves.
• Capital Conservation Buffer (CCB) — an additional 2.5% of RWA in CET1. Breaching this buffer triggers automatic restrictions on distributions and discretionary payments, creating a graduated "traffic light" system.
• Countercyclical Capital Buffer (CCyB) — a variable buffer set by APRA based on systemic risk conditions. APRA can raise the CCyB up to 3.5% during periods of elevated credit growth. As of early 2026, the CCyB for Australian exposures is 1.0%.
• D-SIB Buffer (Domestic Systemically Important Bank) — APRA designates the four major banks and Macquarie as D-SIBs, requiring an additional 1.0% CET1 buffer. This is the operational equivalent of the global G-SIB surcharge for large international banks.
• Tier 1 Capital minimum — 6.0% of RWA, comprising CET1 plus Additional Tier 1 (AT1) instruments.
• Total Capital minimum — 8.0% of RWA, adding Tier 2 instruments to the Tier 1 base.

Adding up the minimums and buffers for a major bank: 4.5% CET1 minimum + 2.5% CCB + 1.0% CCyB + 1.0% D-SIB buffer = 9.0% CET1 before APRA's supervisory expectations. APRA's informal benchmark for the majors has been around 10.5% CET1, a level the major banks have maintained since 2018 and which APRA considers consistent with "unquestionably strong."

For non-D-SIB ADIs, the total stack is lower but the CCB still applies, and APRA will add Pillar 2 capital requirements through the ICAAP process if supervisors identify material risks not captured by the standard Pillar 1 calculations.

Risk-Weighted Assets

Capital ratios are expressed as a percentage of RWA, not total assets. RWA are calculated by applying risk weights to each asset class — a government bond might have a 0% weight while an unsecured personal loan might have a 75% weight. The APS 112 and APS 113 standards govern how these risk weights are calculated, which is why they are central to capital adequacy compliance.

APS 110: Measurement and Management of Capital

APS 110 is the master standard that defines what counts as capital, how it is measured, and the overall management obligations. The July 2023 revision (implementing the Basel III "finalisation" reforms that Australia delayed from the original 2022 date) made significant changes that remain embedded in current compliance requirements.

Capital Tiers and Eligibility Criteria

APS 110 Attachment A specifies the eligibility criteria for each capital tier:

• Common Equity Tier 1 (CET1) — ordinary shares, share premium, retained earnings, accumulated other comprehensive income (AOCI), and general reserves. To qualify, instruments must be permanent, non-redeemable, and have no fixed or mandatory distributions. Innovative or structured instruments generally do not qualify.
• Additional Tier 1 (AT1) — perpetual, subordinated instruments that can absorb losses on a going-concern basis. Australian AT1 must comply with APRA's Non-Viability Contingent Capital (NVCC) requirement: the instrument must convert to ordinary shares or be written off if APRA determines the ADI would become non-viable without the conversion. The NVCC trigger is a key feature of Australian AT1 that differs from some overseas equivalents.
• Tier 2 (T2) — subordinated instruments with an original maturity of at least five years. Tier 2 absorbs losses in a gone-concern scenario (liquidation or resolution) rather than on a going-concern basis. Like AT1, Tier 2 instruments require NVCC features.

Regulatory Adjustments and Deductions

APS 110 requires significant deductions from CET1 that compliance teams sometimes overlook when assessing their capital position:

• Goodwill and other intangible assets — fully deducted from CET1. This is a major item for ADIs that have completed acquisitions and carried significant goodwill on their balance sheet.
• Deferred tax assets (DTAs) — DTAs that depend on future profitability are deducted. DTAs arising from temporary differences are subject to a threshold deduction approach.
• Investments in financial institutions — significant holdings in the capital of other ADIs, insurers, and financial institutions are deducted (or subject to threshold deductions) to prevent double-counting of capital across the financial system.
• Defined benefit pension fund deficits — net pension fund liabilities are deducted from CET1; surpluses receive limited recognition.
• Expected loss shortfall — for IRB-accredited ADIs, any shortfall between APRA-eligible provisions and the IRB expected loss estimate is deducted 50% from CET1 and 50% from Tier 2.

Capital Management Plans

APS 110 requires ADIs to maintain a Capital Management Plan approved by the board that sets out the ADI's target capital ratios, triggers for capital actions, and strategies for maintaining capital adequacy across a range of scenarios. The plan must be reviewed at least annually and updated after material changes in strategy, risk profile, or market conditions.

APRA expects the Capital Management Plan to be integrated with the ICAAP (discussed below) and the overall business plan. Siloed capital management that does not connect to strategic planning is a common supervisory concern.

APS 112: Capital Adequacy — Standardised Approach to Credit Risk

Credit risk — the risk that a borrower or counterparty fails to meet its obligations — is by far the largest component of RWA for most Australian ADIs. APS 112 governs how standardised-approach ADIs calculate credit risk RWA. (Large ADIs that have received APRA accreditation use the internal ratings-based approach under APS 113, which is more complex and not covered in depth here.)

Exposure Classes and Risk Weights

APS 112 categorises exposures into classes, each with prescribed risk weights:

• Sovereign exposures — exposures to central governments and central banks. Australian dollar claims on the Commonwealth Government and the Reserve Bank of Australia receive a 0% risk weight. Foreign sovereign claims depend on the sovereign's external credit assessment.
• ADI exposures — exposures to banks and other deposit-taking institutions. Risk weights range from 20% (short-term interbank claims) to 150% (unrated ADIs below investment grade).
• Residential mortgage exposures — the single largest exposure class for most Australian ADIs. Risk weights under the July 2023 reforms moved to a risk-sensitive table based on loan-to-value ratio (LVR) and whether the loan is owner-occupier or investor. LVR below 60% on an owner-occupier loan attracts a 20% risk weight; LVR above 80% without lenders mortgage insurance attracts 70%.
• Corporate exposures — risk weights depend on external credit ratings. Unrated corporates are assigned 100% under the standardised approach (down from a higher weight under pre-2023 rules for some categories).
• Retail exposures — qualifying revolving exposures (credit cards, overdrafts) receive 45% if they meet the granularity and volatility criteria; other retail is 75%.
• Past due exposures — loans 90+ days past due (other than residential mortgages) attract a 150% risk weight unless specific provisions cover at least 20% of the outstanding balance, in which case the risk weight reduces to 100%.

Credit Risk Mitigation (CRM)

APS 112 allows ADIs to reduce RWA through recognised credit risk mitigants, subject to strict eligibility, legal certainty, and operational requirements:

• Financial collateral — cash, government securities, and investment-grade debt securities can substitute the counterparty risk weight with the collateral issuer's risk weight, subject to haircuts for market value volatility and currency mismatch.
• Guarantees and credit derivatives — eligible guarantors (sovereigns, ADIs, corporates with external ratings of A- or better) allow substitution of the guarantor's risk weight for the underlying exposure, subject to documentation and legal requirements.
• On-balance-sheet netting — for ADIs that have bilateral netting agreements meeting APS 112 legal certainty requirements, net exposures rather than gross positions can be used for capital calculation.

A common compliance gap is treating CRM as reducing capital requirements without ensuring the operational conditions are met — expired collateral agreements, undocumented netting arrangements, or collateral that fails the "eligible financial collateral" definition in Attachment B of APS 112.

APS 210: Liquidity

Capital solvency and liquidity are distinct but connected. An ADI can be solvent (assets exceed liabilities) but still fail if it cannot meet its obligations as they fall due. APS 210 implements the Basel III liquidity standards in Australia, with some significant local adaptations.

Liquidity Coverage Ratio (LCR)

The LCR measures an ADI's ability to survive a 30-day acute stress scenario by holding sufficient High Quality Liquid Assets (HQLA):

LCR = Stock of HQLA ÷ Total net cash outflows over 30-day stress period ≥ 100%

• HQLA Level 1 — cash, RBA reserve balances, Commonwealth Government Securities (CGS), and semi-government securities (state and territory government bonds that meet specific criteria). No haircut for Level 1 assets.
• HQLA Level 2A — certain government-guaranteed securities and high-rated covered bonds, subject to a 15% haircut and a cap of 40% of total HQLA.
• HQLA Level 2B — residential mortgage-backed securities and certain equities meeting specific criteria, subject to larger haircuts (25–50%) and tighter caps. APRA has applied stricter criteria than the Basel minimum for Australian Level 2B eligibility.

The Committed Liquidity Facility (CLF)

Australia faces a structural challenge under the LCR: the stock of Commonwealth Government Securities is insufficient to allow all ADIs to meet their LCR requirements using conventional HQLA. APRA addressed this through the Committed Liquidity Facility (CLF), under which the RBA committed to provide repos against eligible assets (primarily residential mortgage-backed securities and covered bonds) in a stress scenario, and ADIs paid a fee for this commitment.

Critically, APRA announced in 2021 that the CLF would be phased out as the CGS market expanded. The CLF was reduced to zero for the major banks from 1 January 2022 and for smaller ADIs from 1 January 2023. ADIs that relied on the CLF have had to restructure their liquidity portfolios toward genuine HQLA — a transition that had significant balance sheet and earnings implications.

Net Stable Funding Ratio (NSFR)

Where the LCR addresses short-term liquidity over 30 days, the NSFR addresses structural funding stability over a one-year horizon:

NSFR = Available Stable Funding (ASF) ÷ Required Stable Funding (RSF) ≥ 100%

• ASF reflects the stability of funding sources — retail deposits receive higher ASF factors (90–95%) than wholesale short-term funding (0–50%), reflecting their relative stickiness under stress.
• RSF reflects how much stable funding is needed to support each asset class — liquid assets like CGS require little stable funding (5%), while long-dated mortgages require close to 100% stable funding.

The NSFR creates incentives for ADIs to lengthen their funding profiles and reduce reliance on short-term wholesale funding — exactly the structural vulnerability that amplified the 2008 financial crisis.

Minimum Liquidity Holdings (MLH) for Smaller ADIs

ADIs with total assets below $1 billion (as defined by APRA) are not subject to the LCR and NSFR. Instead, they must maintain liquid assets equal to at least 9% of their liabilities under the simpler Minimum Liquidity Holdings approach. MLH-eligible assets are specified in APS 210 Attachment C and include CGS, semi-government securities, ADI paper, and certain other instruments.

ICAAP: Your Internal Capital Adequacy Assessment Process

The Pillar 1 minimum capital requirements in APS 110, 112, and 113 are not intended to capture every risk an ADI faces. Pillar 2 — the supervisory review process — is where APRA assesses whether the Pillar 1 framework adequately captures each ADI's specific risk profile, and the Internal Capital Adequacy Assessment Process (ICAAP) is the ADI's own assessment of the same question.

What APRA Expects from the ICAAP

APRA's expectations for ICAAP are set out in APS 110 and CPG 110 (the associated guidance paper). The key requirements are:

• Board ownership — the ICAAP must be approved by the board, not just management. The board must understand and challenge the key assumptions, particularly in stress scenarios. APRA is explicit that ICAAP should inform strategic decision-making, not be a compliance exercise produced by the treasury team in isolation.
• All material risks — the ICAAP must assess all material risks, not just those captured by Pillar 1. This typically includes: credit concentration risk, interest rate risk in the banking book (IRRBB), operational risk (beyond the standardised calculation), pension risk, strategic risk, reputational risk, and climate-related financial risk (increasingly expected by APRA supervisors).
• Internal capital targets — based on the risk assessment, the ADI must set internal capital targets above the regulatory minimums, with buffers that reflect management's risk appetite and the uncertainty in the risk models.
• Capital planning horizon — the ICAAP must project capital needs over a forward-looking horizon of at least three years, covering the business plan and strategic initiatives.
• Stress testing — the ICAAP must include stress testing of capital adequacy under severe but plausible scenarios. APRA expects at least one scenario calibrated to the most severe downturn experienced in Australia's financial history (typically the early 1990s recession), plus forward-looking scenarios relevant to current conditions.
• Integration with recovery planning — for larger ADIs, the ICAAP should connect with the Recovery Plan (required under APS 900) — the capital actions and funding strategies available in a stress scenario must be coherent across both documents.

Stress Testing in Practice

APRA has been increasingly prescriptive about the quality of stress testing. The common failure modes it identifies in supervisory reviews include:

• Scenarios that are internally inconsistent (e.g., a severe credit loss scenario that assumes no property price decline)
• Management overlays that reduce the severity of stress outcomes without documentation and board challenge
• Stress tests that only run from the current balance sheet without considering the dynamic response of the balance sheet to the stress (e.g., runoff of deposits, drawdowns of committed facilities)
• No clear link between stress test outcomes and the capital management plan actions (when does the board act, and what actions are available?)

APRA's own stress testing exercise — the annual Credit Risk Stress Test run by the supervisory team — provides benchmarking for ADIs. Results from the industry exercise have been published in aggregate in APRA's Annual Report and are a useful calibration tool for internal scenario design.

APRA's Pillar 2 Capital Add-ons

Where APRA concludes that an ADI's Pillar 1 capital requirements materially understate its risk profile, APRA can impose a Pillar 2 capital requirement — an additional capital charge specific to that ADI that sits on top of the Pillar 1 minimums. These are confidential and not publicly disclosed, but APRA has signalled in industry forums that it uses this tool actively for ADIs with identified weaknesses in credit risk management, concentration risk, or operational resilience.

Common Compliance Gaps We Find

When GoComply scans capital adequacy policies, ICAAP documents, and liquidity frameworks, the following gaps appear most frequently:

• Capital Management Plan not integrated with ICAAP — the two documents exist in separate governance streams and contain contradictory target ratios, stress assumptions, or capital actions. APRA expects a coherent, integrated view.
• CRM documentation deficiencies — collateral agreements, netting confirmations, or guarantee documentation that does not meet the legal certainty requirements in APS 112 Attachment B, meaning the CRM cannot be recognised for capital calculation purposes even though management assumes it is reducing RWA.
• ICAAP stress scenarios not calibrated to current conditions — scenarios that were designed three years ago and not updated to reflect rising interest rates, commercial property stress, or emerging climate risk in the loan portfolio.
• Incomplete LCR stress scenario assumptions — retail deposit outflow rates that are below the APS 210 minimum assumptions, or committed facility drawdown rates that understate the Basel III floor rates, leading to an understated net cash outflow denominator.
• NVCC trigger documentation gaps — AT1 and Tier 2 instruments in the capital stack that predate the July 2023 reforms and may not fully satisfy the updated NVCC requirements in APS 111 (Capital Adequacy — Internally Generated Capital Instruments), creating eligibility risk at the next APRA capital review.
• Board engagement gaps on ICAAP — ICAAP approved by management committee with board noting rather than board approval, or board minutes that do not evidence genuine challenge of the key stress assumptions. This is a governance red flag in APRA supervisory reviews.

Related Standards and Interactions

Capital adequacy compliance does not sit in isolation. The APS standards interact with a broader web of prudential requirements that compliance teams need to manage together:

• APS 220 (Credit Quality) — the provisioning standard that directly affects the expected loss shortfall deduction under APS 110. Inadequate provisioning reduces Tier 2 capital and increases the CET1 deduction for the shortfall.
• APS 330 (Public Disclosure) — the Pillar 3 disclosure standard requires quarterly and annual public disclosure of capital ratios, RWA by asset class, and liquidity metrics. Disclosure gaps are a regulatory breach even if the underlying capital position is sound.
• APS 222 (Associations with Related Entities) — limits on capital support to related entities, step-in risk, and contagion from non-regulated affiliates. Breaches can trigger APRA notifications and adjustments to the consolidated capital calculation.
• CPS 510 (Governance) — board composition and remuneration requirements. Capital-related decisions (target ratios, stress test assumptions, ICAAP approval) must flow through board-level governance consistent with CPS 510.
• APS 900 (Recovery Planning) — for larger ADIs, the recovery plan must be calibrated against the ICAAP stress testing and must identify credible capital restoration strategies that are actionable within the time horizons in the plan.
• IRRBB (Interest Rate Risk in the Banking Book) — governed by APS 117, IRRBB must be captured in the ICAAP as a material Pillar 2 risk for any ADI with significant fixed-rate mortgage books or funding mismatches. The rising rate environment since 2022 has made IRRBB a front-of-mind supervisory priority.

This guide is for informational purposes and does not constitute legal advice. Consult qualified compliance professionals for specific obligations. GoComply covers 37 Australian financial regulations — ask the chatbot for instant clause-level answers on APS 110, APS 112, APS 210, and the full APRA prudential standards suite.