Tier 1 Capital vs. Tier 2 Capital: An Overview
Under the Basel Accord, a bank has to maintain a certain level of cash or liquid assets as a ratio of its risk-weighted assets. This is known as the capital adequacy ratio (CAR). Under Basel III, a bank's tier 1 and tier 2 assets must be at least 10.5% of its risk-weighted assets, up from 8% under Basel II.
A bank's capital consists of tier 1 capital and tier 2 capital, and the two types of capital are different (there is a third type, called tier 3 capital, conveniently enough).
Tier 1 capital is a bank's core capital, whereas tier 2 capital is a bank's supplementary capital. A bank's total capital is calculated by adding its tier 1 and tier 2 capital together. Regulators use the capital ratio to determine and rank a bank's capital adequacy.
Tier 1 Capital
Tier 1 capital consists of shareholders' equity and retained earnings. Tier 1 capital is intended to measure a bank's financial health and is used when a bank must absorb losses without ceasing business operations.
Tier 1 capital is the primary funding source of the bank. Typically, it holds nearly all of the bank's accumulated funds. These funds are generated specifically to support banks when losses are absorbed so that regular business functions do not have to be shut down.
Under Basel III, the minimum tier 1 capital ratio is 10.5%, which is calculated by dividing the bank's tier 1 capital by its total risk-based assets. For example, assume there is a bank with tier 1 capital of $176.263 billion and risk-weighted assets worth $1.243 trillion. So, the bank's tier 1 capital ratio for the period was $176.263 billion / $1.243 trillion = 14.18%, which met the minimum Basel III requirement of 10.5%.
Tier 2 Capital
Tier 2 capital includes revaluation reserves, hybrid capital instruments and subordinated term debt, general loan-loss reserves, and undisclosed reserves. Tier 2 capital is supplementary capital because it is less reliable than tier 1 capital. Tier 2 capital is considered less reliable than Tier 1 capital because it is more difficult to accurately calculate and is composed of assets that are more difficult to liquidate.
In 2019, under Basel III, the minimum total capital ratio is 12.9%, which indicates the minimum tier 2 capital ratio is 2%, as opposed to 10.9% for the tier 1 capital ratio. Assume that same bank reported tier 2 capital of $32.526 billion. Its tier 2 capital ratio for the quarter was $32.526 billion / $1.243 trillion = 2.62%. Thus, its total capital ratio was 16.8%(14.18% + 2.62%). Under Basel III, the bank met the minimum total capital ratio of 12.9%.
Key Takeaways:
Under Basel III, a bank's tier 1 and tier 2 assets must be at least 10.5% of its risk-weighted assets, up from 8% under Basel II.
Tier 1 capital is the primary funding source of the bank.
Tier 1 capital consists of shareholders' equity and retained earnings.
Tier 2 capital includes revaluation reserves, hybrid capital instruments and subordinated term debt, general loan-loss reserves, and undisclosed reserves.
Tier 2 capital is considered less reliable than Tier 1 capital because it is more difficult to accurately calculate and more difficult to liquidate.
Connect With Us