Tier 2 capital is debt that is subordinated to the majority of other calls on the bank. It is divided into Upper Tier 2 and Lower Tier 2. Upper Tier 2 debt is undated. It must be of a type unlikely to threaten the solvency of the bank. Lower Tier 2 capital is dated normally with a maturity date of more than 5 years.

Lower Tier 2 capital cannot exceed 50% of Tier 1.

Tier 2 capital as a whole cannot exceed Tier 1 capital.

A tier one capital is a measure of the bank's strength. If you want a better and more reliable bank it is important for it to have a tier one capital.

The Capital Adequacy Ratio of a bank is arrived at by comparing the sum of its Tier 1 and Tier 2 capital to its risk. The equation for expressing the Capital adequacy ratio is: CAR=(Tier 1 Capital +Tier2 Capital)/Risk weighted assets.

Tier 1 capital is a measure of how well a bank stands financially. I could not find anything to describe what a service for this would be; but I would have to guess that a tier 1 capital service might be a service that lists different bank standing based on this score.

just different capitals