I am not American and I am trying to understand how the interest of US Treasury debt is paid. I know their respective maturity:

T-bills: up to and including 1 year

T-notes: 2 to 10 years

T-bonds: >10 years

According to what I understood, taking the date of 08/Jun/2021:

**Example T-bills:**

If I buy T-bills of 6 months, then the price would be $960 and after 6 months I receive $1,000 (which means I would pay less than the face value and in the maturity date I get: $960 + 4% of $1,000 = $1000)

The same kind of method I apply for all T-bills

**Example T-notes and T-bonds:**

T-note of 10 years, I would earn 1,53% every semester. The same is for all T-notes and T-bonds.

------> It seems to much interest and I am probably wrong. Is anyone able to confirm it or to explain how interest are paid for these 3 instruments?