# Section 36(1)(iiia) - Discount on Zero Coupon Bonds (ZCBs)
## Provision
- Deduction is allowed for the discount on Zero Coupon Bonds (ZCBs) on a pro-rata basis.
- The discount is to be spread over the period of life of the bond in the prescribed manner.
## Concept
- A ZCB is issued at a discount and redeemed at face value; it carries no periodic interest.
- Difference between issue price and redemption price represents 'interest cost' to the issuer.
- This cost is amortised over the life of the bond.