Commonwealth Bank Capital Ratio Slips to 11.5%
The bank's CET1 ratio fell from 12.0% as risk-weighted assets grew in the September 2026 quarter.
Updated on Nov. 10, 2026 in Corporate Finance
Commonwealth Bank of Australia released its Basel III Pillar 3 capital and risk disclosures for the quarter ended 30 September 2026, showing its Common Equity Tier 1 capital ratio at 11.5%, down from 12.0% at 30 June 2026. Total risk-weighted assets rose by $9.0 billion to $531.4 billion over the quarter.
Why it matters
The bank's capital position is a key measure of its ability to absorb losses under the prudential framework overseen by the Australian Prudential Regulation Authority. The decline reflects the combined effect of the 2026 final dividend and higher risk-weighted assets, partly offset by earnings-generated capital.
The disclosure is a regulatory capital filing, with the CET1 ratio of 11.5% compared against 12.0% at 30 June 2026. Credit Risk RWA rose by $7.2 billion and Operational Risk RWA by $2.2 billion, and the filing does not address how these trends will develop in coming quarters.
The players
Commonwealth Bank of Australia
A major Authorised Deposit-taking Institution regulated by the Australian Prudential Regulation Authority and one of Australia's largest banks by assets.
The details
The CET1 ratio rose 52 basis points from earnings-generated capital and 6 basis points from other items, but was offset by a 22-basis point reduction from the net increase in total RWA and an 85-basis point impact from the 2026 final dividend. Tier 1 capital stood at 13.0% and the Total Capital ratio at 20.5%, while the Liquidity Coverage Ratio of 132% and Net Stable Funding Ratio of 115% remained stable.
Timeline
30 June 2026: CET1 ratio of 12.0% reported as the prior-period baseline.
2026 final dividend: Carried an 85-basis point impact on the CET1 ratio.
30 September 2026: Quarter-end date for the disclosed capital and leverage figures.
Market Dynamics
The filing sits within Basel III's Pillar 3 disclosure regime, which requires periodic public reporting of capital and risk metrics. The quarter's movement reflects the bank's ongoing balance between earnings-generated capital and growth in risk-weighted assets under that framework.
Shareholders and bond holders can use the lower CET1 ratio to gauge the bank's capacity to absorb losses and fund growth. The 85-basis point dividend impact shows how distributions are weighed against capital retention in the quarter.
The takeaway
A falling CET1 ratio does not by itself signal weakness, but tracking how risk-weighted assets and dividends move against earnings-generated capital gives a clearer picture of a bank's resilience over successive quarters.
Further reading
For more on how banks manage their balance sheets and capital positions, explore Corporate Finance coverage.
