| PTC Series A | -- | -- | [ICRA]AAA(SO) | -- |
| PTC Series A | -- | -- | [ICRA]AAA(SO) | -- |
| PTC Series A | -- | -- | [ICRA]AAA(SO) | -- |
| PTC Series A | -- | -- | [ICRA]AAA(SO) | -- |
| PTC Series B | -- | -- | [ICRA]AAA(SO) | -- |
| Second Loss Facility | -- | -- | [ICRA]A-(SO) | -- |
| Non-convertible Debenture Programme (Public Issue) | -- | -- | [ICRA]AA+(Positive) | -- |
| Non-Convertible Debentures | -- | -- | [ICRA]AA+(Positive) | -- |
| Perpetual Debt | -- | -- | [ICRA]AA(Positive) | -- |
| Commercial Paper | [ICRA]A1+ | -- | -- | -- |