
The capital adequacy ratio in Australian banking is a crucial metric that determines a bank's financial stability. It's a simple calculation of a bank's capital relative to its risk-weighted assets.
In Australia, the capital adequacy ratio is set at 10.5% by the Australian Prudential Regulation Authority (APRA). This means that for every dollar of risk-weighted assets, a bank must have at least 10.5 cents of capital.
This ratio is designed to ensure that banks have sufficient capital to absorb potential losses and maintain stability in the financial system.
What Is Capital Adequacy Ratio?
The capital adequacy ratio is a measurement of a bank's available capital, used to respond to credit risks and liabilities. It ensures the bank can absorb potential losses and decrease the risk of becoming insolvent.
A good capital adequacy ratio is crucial in protecting depositors' money in the face of financial challenges. It's a safeguard against bank insolvency, making it a vital aspect of the banking system.
In essence, the capital adequacy ratio is a benchmark that measures a bank's financial resilience and ability to withstand potential risks.
What Is It?
The capital adequacy ratio is a measurement of a bank's available capital, used to respond to credit risks and liabilities. It's a crucial metric for banks to ensure they can absorb potential losses and avoid becoming insolvent.
A good capital adequacy ratio is essential for protecting depositors' money in the face of financial challenges. This ratio helps banks maintain a healthy balance between their assets and liabilities.
The capital adequacy ratio is also known as the capital to risk adequacy ratio (CRAR). This name highlights its purpose: to ensure that banks have sufficient capital to cover potential risks.
Ratios
The Capital Adequacy Ratio is a measure of a bank's ability to absorb potential losses.
A bank's capital adequacy ratio is calculated by dividing its total capital by its total risk-weighted assets.
This ratio is a key indicator of a bank's financial health and stability.
The Basel Accords set the minimum capital requirements for banks, with a minimum ratio of 8% for credit risk and 7% for operational risk.
A higher capital adequacy ratio indicates a bank's ability to withstand potential losses and maintain its financial stability.
Banks with a lower ratio may struggle to meet their financial obligations, increasing the risk of default or failure.
Basel III/Basel IV Standards
The Basel III and Basel IV standards are global banking regulations that aim to improve financial stability and prevent future crises.
The Basel III standards, introduced in 2010, require banks to hold a minimum capital adequacy ratio of 7% to maintain their financial stability.
Banks in Australia are required to implement these standards by 2019, as per the Australian Prudential Regulation Authority (APRA).
The Basel IV standards, also known as Basel 4, are currently being developed and are expected to be implemented in the near future.
Basel III/Basel IV Standards: Challenges and Opportunities
The Australian Prudential Regulation Authority (APRA) is making a significant revision to the capital framework, which will take effect on 1 January 2023.
APRA’s key objectives of the Basel reforms are to align the Australian framework to the finalised BCBS standards.
The Basel reforms aim to improve flexibility, risk sensitivity, transparency, and (international) comparability along with enhancing competition in the Australian Banking industry.
APRA is revising the capital framework to align with the finalised Basel standards, which will present both challenges and opportunities.
Tier-1
Tier-1 capital is the foundation of a bank's financial strength. It's the amount of capital a bank has to keep it functioning even through riskier transactions like loans and trading. This type of capital is crucial for a bank's survival.
Tier-1 capital includes retained earnings and shareholder equity. These are the funds that help a bank weather financial storms.
Retained earnings are profits that a bank has kept within the company, rather than distributing them to shareholders. This money can be used to absorb losses or invest in new opportunities.
Shareholder equity, on the other hand, is the value of the bank's shares held by its shareholders. It's a key indicator of a bank's financial health.
Calculating CRAR
Calculating CRAR is a crucial step in determining a bank's capital adequacy ratio in Australia. Banks use a risk-weighted assets formula to calculate CRAR, which takes into account the level of risk associated with each asset.
A bank's assets are not all created equal, and some assets are considered safer than others. Mortgages with property as collateral are considered lower-risk assets, which can result in a higher capital adequacy ratio.
Banks in Australia, especially the larger ones, may use their internal weighting system to decide which assets have the highest risk. This process must be approved by APRA and adhere to their strict guidelines.
The goal of calculating CRAR is to ensure that banks have sufficient capital to cover potential losses and maintain stability in the financial system.
Components of CRAR
The capital adequacy ratio is made up of two main components: capital and risk-weighted assets. Capital is the bank's common equity, which is the sum of its common shares.
Common equity is used because it's the easiest to calculate and is composed of assets that are the easiest to liquidate in times of financial stress.
Risk-weighted assets are all the bank's assets, weighted for credit risk. This means that assets like government bonds are weighted to reflect their low risk, while residential mortgage loans are weighted to reflect their higher risk.
In essence, the capital adequacy ratio recognizes the bank's ability to stay solvent in times of financial stress.
Assessment and Requirements
APRA has set two different benchmarks for ADIs, depending on which method they're using to assess capital adequacy.
The standardised approach requires ADIs to use ratings from external credit rating agencies to determine their appropriate ratio. This approach is straightforward and widely used.
APRA also allows ADIs to use the internal ratings-based approach, which allows them to calculate their risk weightings based on their own estimation of the probability of default and loss. However, this approach requires approval from APRA, which is only granted if the ADI meets stringent governance and risk-modelling criteria.
Requirements
In Australia, banks and insurers have minimum capital requirements to ensure their financial stability.
The minimum CET1 capital ratio for ADIs is set at 4.5 per cent, plus a capital buffer that adds an additional 2-4 per cent of CET1 capital.
APRA receives quarterly financial statements to monitor the level of these ratios and takes swift action on any potential breaches of minimum capital requirements.

Banks and insurers are expected to maintain prudent buffers above the minimum amounts and develop forward-looking capital management plans and targets.
They can improve their capital position by raising new capital, restricting dividends, or reducing their risk profile.
APRA has set two different benchmarks for ADIs to assess capital adequacy, the 'standardised' approach and the 'internal ratings-based' approach.
The 'standardised' approach uses ratings from external credit rating agencies to calculate the appropriate ratio.
APRA grants approval for the 'internal ratings-based' approach, but only if the ADI meets stringent governance and risk-modelling criteria.
The four biggest banks in Australia have been granted approval to use the 'internal ratings-based' approach.
Banks Hold Strong Positions
Australian banks have strong capital positions, with their capital ratios little changed over 2021 from their already high levels.
The four major banks' Common Equity Tier 1 (CET1) capital ratios are currently 1 percentage point above pre-pandemic levels.
Banks returning capital to shareholders through share buybacks and dividends has offset the positive impact on capital ratios from strong earnings in 2021.
Some banks are expected to buy back additional shares this year, given their capital levels are well above regulatory capital requirements.
The Australian Prudential Regulation Authority (APRA) has finalised its 'unquestionably strong' capital framework, which increases the CET1 ratio requirement by 2.25 percentage points to 10.25 per cent for major banks.
This framework includes larger capital conservation buffers for major banks and a non-zero countercyclical capital buffer for all banks that can be drawn down in periods of stress.
Banks are expected to have their own capital targets above APRA's minimum requirement, and risk weights will be adjusted to improve the allocation of capital to risk.
Risk weights for some loans made to small and medium-sized enterprises will be reduced, while risk weights for higher-risk mortgages will be increased.
The decline in the average risk weight will result in capital ratios increasing for the banking system, but the change will vary by bank due to differences in risk profiles.
APRA has also finalised its requirement for the four major banks to increase their total loss-absorbing capacity, which can come in the form of Additional Tier 1 and Tier 2 capital instruments.
The implementation will see minimum Total Capital requirements for major banks increase by 4.5 percentage points to 18.25 per cent of risk-weighted assets from 2026.
Impact and Background
In Australia, the capital adequacy ratio is a crucial metric for banks to ensure they have sufficient capital to absorb potential losses. The minimum capital adequacy ratio in Australia is 10.5%.
The Australian Prudential Regulation Authority (APRA) is responsible for overseeing the banking sector and setting regulatory requirements, including the capital adequacy ratio. APRA's role is to ensure the stability of the financial system.
The capital adequacy ratio is calculated by dividing a bank's total capital by its risk-weighted assets. This ratio helps banks to manage their risk and maintain a stable financial position.
Impact on
APRA does not anticipate additional capital will need to be raised, because ADIs already meet ‘unquestionably strong’ benchmarks.
This means that Australian banks already have a solid foundation of capital, which is a good thing.
By aligning RWA calculations more closely to BCBS standards, capital ratios of Australian banks will increase.
This change will make Australian banks' capital ratios more comparable to those of international peers.
Background

APRA's goal is to ensure banks maintain provisions and reserves adequate to absorb existing and estimated future credit losses into their business.
The Financial System Inquiry report of 2014 required APRA to set prudential standards so that ADI capital ratios are "unquestionably strong".
Banks are expected to be able to withstand significant default without looking to the government for a bailout.
APRA aims to prevent bank failures by implementing these standards.
Banking and Insurance
In Australia, banking and insurance sectors are heavily regulated to ensure stability and security. The Australian Prudential Regulation Authority (APRA) requires banks to maintain a minimum capital adequacy ratio of 8% to mitigate risks.
APRA's prudential standards for banks and insurance companies are designed to promote financial stability and protect consumers. This includes requirements for capital adequacy, liquidity, and risk management.
The Australian Securities and Investments Commission (ASIC) also plays a crucial role in regulating the insurance industry, ensuring that insurance products are fair and transparent.
How Is Car Insurance Calculated?
Car insurance calculations aren't as mysterious as they seem. Capital adequacy ratio, which measures two types of capital, is actually a concept borrowed from banking, not insurance.
The capital adequacy ratio is calculated by dividing a bank's capital by its risk-weighted assets. This concept is not directly applicable to car insurance, but it's interesting to note the connection between the two.
To calculate car insurance, you need to consider the risk of an accident occurring. This risk is often measured by factors such as age, driving history, and location.
The type of capital measured by the capital adequacy ratio is divided into two categories: common equity tier 1 and tier 2 capital. These categories are not relevant to car insurance calculations.
Car insurance companies consider various factors to determine your premium, including your vehicle's make and model, as well as the coverage you choose.
Insurers' Profits Recover Further
Insurers' profits have made a significant recovery in recent years, with the industry's overall profit ratio increasing to 18.5% in 2022.

This growth can be attributed to a combination of factors, including a decrease in claims frequency and a rise in investment income.
The industry's claims ratio has been steadily decreasing since 2019, with a notable drop in 2022 to 73.5%.
In addition to this, insurers have seen a significant increase in investment income, with returns on investments reaching 4.5% in 2022.
As a result, insurers have been able to increase their reserves, with the industry's reserve ratio increasing to 64.5% in 2022.
Credit Risk
Credit risk is a crucial aspect of capital adequacy, and APRA has introduced new standards to improve the risk sensitivity of risk weights. APRA has released draft Prudential Standards for Capital Adequacy and Credit Risk.
The Standardised Approach to Credit Risk (APS 112) and the Internal Ratings-based Approach to Credit Risk (APS 113) will help banks better manage their credit risk. APRA is aligning the presentation of capital ratios to international definitions.
A capital floor is introduced for IRB approved banks, which means IRB RWA requirements cannot fall below 72.5% of RWA calculated under standardised approaches. This floor is calculated at the aggregate RWA level and applies from 1 January 2023.
Risk weights will be more granular across all portfolios, including mortgages (e.g. owner occupied vs investment), commercial properties (cashflow dependent), corporate, leasing and defaulted exposures. This will help banks better assess their credit risk.
Frequently Asked Questions
What is a good capital adequacy ratio?
A good capital adequacy ratio is at least 8%, with a higher ratio of Tier 1 Capital to Risk-Weighted Assets of at least 6% for optimal bank stability
What is the Tier 1 capital ratio for banks in Australia?
The Tier 1 capital ratio for banks in Australia is 12.6%, indicating a stable level of capital adequacy. This ratio has been maintained through strong profits and a decline in market-risk weighted assets.
What is tier 2 capital in Australia?
Tier 2 capital in Australia refers to a type of subordinated debt that provides an additional layer of protection for banks, ranking above Tier 1 capital. This financial instrument helps strengthen a bank's capital base, but its specific features and regulations can be complex, so it's worth exploring further.
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