Tier 2 Capital

Tier 2 capital is the secondary layer of a bank’s capital structure, comprising subordinated debt, loan loss reserves, and other instruments that are junior to Tier 1 capital but senior to unsecured creditors and depositors. It is part of total regulatory capital under Basel capital standards but is not as loss-absorbing as Tier 1.

What constitutes Tier 2 capital

Subordinated debt:

• Bonds that are explicitly subordinated to senior debt and deposits.
• If the bank fails, Tier 2 debt holders are paid after depositors and senior creditors, but before equity holders (who get nothing).
• Typically 5-10 year maturity; banks refinance as they mature.
• Interest rate is higher than senior debt because of subordination risk.

Loan loss reserves (Allowance for Credit Losses):

• Amounts set aside to cover expected loan losses.
• Reduces reported profits but bolsters capital; it is a loss buffer.

Hybrid instruments:

• Some contingent convertibles (CoCos) are classified as Tier 2 (the lower-trigger versions).
• Preferred stock sometimes counts as Tier 2.

The role of Tier 2 capital

Tier 2 is a second line of defense. If a bank has losses that exhaust Tier 1 capital, Tier 2 absorbs the next layer.

Example:

• Bank assets: $1,000.
• Tier 1 capital: $50.
• Tier 2 capital: $20.
• Deposits and other liabilities: $930.
• Losses: $60.

After losses:

• Assets: $940.
• Tier 1 capital: -$10 (deficit; Tier 1 is negative).
• Tier 2 capital: $20, absorbs $10 of the deficit, leaving $10 shortfall.
• Still insolvent.

But imagine losses of $40:

• Assets: $960.
• Tier 1 capital: $10 (survives).
• Tier 2 capital: $20 (untouched).
• Bank remains solvent; Tier 2 is intact.

Tier 2 debt and creditor protection

Tier 2 debt is not risk-free. If the bank fails, Tier 2 bondholders may face haircuts (partial loss of principal).

During the 2008 crisis, many banks failed and Tier 2 (and even senior) debt holders suffered losses. Lehman Brothers’ debt holders lost significant amounts. WaMu (Washington Mutual) debt holders lost nearly everything.

As a result, Tier 2 spreads (the extra yield over risk-free rates) can widen sharply in a crisis.

Basel III caps on Tier 2 capital

Basel III limits Tier 2 to no more than 50% of Tier 1 capital:

• If Tier 1 capital = 6%, Tier 2 can be at most 3%.
• Total capital = Tier 1 + Tier 2 = 9% minimum (6% + 3%).

This ensures the buffer is heavily weighted to Tier 1 capital, which is more loss-absorbing.

Cost of Tier 2 debt

Tier 2 debt is more expensive than unsecured senior debt (because of subordination) but cheaper than raising equity:

• Senior debt: 3-5% yield.
• Tier 2 subordinated debt: 4-6% yield (extra 1-2% for subordination).
• Equity: implicit cost of equity (~8-10%), dilution to shareholders.

Banks prefer Tier 2 debt to equity for this reason. But regulatory limits cap how much can be Tier 2; the rest must be Tier 1 capital.

Loss absorption in bank resolution

In a bank resolution (failure), the order of loss absorption is:

1. Shareholders (equity) absorb all losses first.
2. Tier 1 capital absorbs further losses.
3. Tier 2 capital absorbs further losses.
4. Unsecured creditors.
5. Deposits (protected by FDIC insurance up to $250K per account).

Deposits are protected by government insurance; Tier 2 debt holders are not. This is why Tier 2 requires higher yield — it is riskier.

See also