The Coupon rate is simply the interest rate that every debenture/Bond carries on its face value and is fixed at the time of issuance. For example, a 12% p.a coupon rate on a bond/debenture of Rs 100 implies that the investor will receive Rs 12 p.a. The coupon can be payable monthly, quarterly, half-yearly, or annually or cumulative on redemption

Let us now turn to what is meant by the maturity date of the security. Securities are issued for a fixed period of time at the end of which the principal amount borrowed is repaid to the investors. The date on which the term ends and proceeds are paid out is known as the Maturity date. It is specified on the face of the instrument. In respect of Demat Debt instrument due date is known from ISIN Number of the security.