
	Computer			Customer		Development		Other intangible		Carbon credit				Intangible asset under			Total intangible
	software			contracts#		rights		assets		rights		Goodwill		development			assets
	(INR)			(INR)		(INR)		(INR)		(INR)		(INR)		(INR)			(INR)
Cost
As at April 1, 2022		355			32,592		36		7		—		11,596		68			44,654
Additions during the year		267			—		—		—		—		—		110			377
Disposals and adjustments during the year		—			—		—		—		—		—		(15	)		(15	)
Capitalised during the year		—			—		—		—		—		—		(12	)		(12	)
As at March 31, 2023		622			32,592		36		7		—		11,596		151			45,004
Additions during the year		304			—		—		—		626		—		30			960
Capitalised during the year		—			—		—		—		—		—		(124	)		(124	)
As at March 31, 2024		926			32,592		36		7		626		11,596		57			45,840
Additions during the year		35			—		—		—		—		—		110			145
Assets held for sale		(29	)		—		—		—		—		—		—			(29	)
Capitalised during the year		—			—		—		—		—		—		(76	)		(76	)
As at March 31, 2025		932			32,592		36		7		626		11,596		91			45,880

Accumulated amortisation
As at April 1, 2022		179			4,746		5		0		—		—		—			4,930
Charge for the year (refer Note 32)		56			1,408		—		0		—		—		0			1,464
Capitalised during the year		15			—		—		—		—		—		—			15
As at March 31, 2023		250			6,154		5		0		—		—		0			6,409
Charge for the year (refer Note 32)		136			1,348		1		0		—		—		0			1,485
Capitalised during the year		—			63		—		—		—		—		—			63
As at March 31, 2024		386			7,565		6		0		—		—		0			7,957
Charge for the year (refer Note 32)		48			1,416		0		1		167		—		0			1,632
Assets held for sale		(20	)		—		—		—		—		—		—			(20	)
Capitalised during the year		94			—		—		—		—		—		—			94
As at March 31, 2025		508			8,981		6		1		167		—		0			9,663

Net book value
As at April 1, 2023 (INR)		372			26,438		31		7		—		11,596		151			38,595
As at March 31, 2024 (INR)		540			25,027		30		7		626		11,596		57			37,883
As at March 31, 2025 (INR)		424			23,611		30		6		459		11,596		91			36,217
As at March 31, 2025 (USD)		5			276		0		0		5		136		1			424

# Remaining life of customer contracts ranges from 13 to 19 years as on March 31, 2025 (March 31, 2024: 14 to 20 years, March 31, 2023: 15 to 21 years).

Intangible assets are subject to a pari passu first charge to respective lenders for senior secured bonds, project term loans, buyer's / supplier's credit, working capital loan, debentures, senior secured notes and acceptances as disclosed in Note 18 and Note 23.

The Group undertook the impairment testing of Goodwill assigned to each Individual or Group of CGUs as at March 31, 2025 and 2024 by applying the Value in Use ('VIU') approach. The Group has entered into Power Purchase Agreements (PPA) upto 25 years which entitles the Group to a fixed tariff over the tenure of PPAs. Accordingly, for computing the VIU, the Group has determined cash flow projections based on fixed tariffs as specified in the PPAs upto the remaining tenure of PPAs ranging from 13 to 19 years, and for periods thereafter, forecasted tariffs based on assessment provided by an external specialist. The key assumptions used in computation of VIU are the Plant Load Factor (PLF), a measure of average capacity utilisation of a power plant, used in revenue projections, and discount rates.

The PLF is determined based on forecasts after considering study of future wind speed (only for wind segment) and past performance; and discount rates are based on weighted average cost of capital. These assumptions are forward-looking and are affected by future economic and climatic conditions including wind speed.

(1) The Group has engaged external specialists to assist in determining (a) future PLFs and (b) discount rates and computation of VIU. The Group has currently estimated a discount rate of 12.15% (March 31, 2024: 12.12%), and PLF of 26.27% (March 31, 2024: 26.27%) in determination of VIU . Increase in discount rate by 1.04% per annum (March 31, 2024: 0.38% per annum) or decrease in PLF by 1.66% (March 31, 2024: 0.62% per annum), would result in value in use to be equal to the carrying amount.

(2) The Group has currently estimated discount rates ranging between 12.15% to 13.22% (March 31, 2024: 11.43% to 13.09%), and PLF of 22.50% to 31.70% (March 31, 2024: 22.50% to 31.70%) in determination of VIU. The Management believes that any reasonably possible change in the key assumptions on which value in use is based would not cause the carrying amount of each group of CGU and individual CGU to exceed the value in use.

(3) The Group has currently estimated discount rates ranging between 12.25% to 14.15% (March 31, 2024: 11.74% to 13.52%), and PLF of 18.13% to 24.62% (March 31, 2024: 18.13% to 24.62%) in determination of VIU. The Management believes that any reasonably possible change in the key assumptions on which value in use is based would not cause the carrying amount of each group of CGU and individual CGU to exceed the value in use.