
	Computer software			Customer contracts#		Customer relationship*		Development rights		Other intangible assets		Carbon credit rights		Goodwill			Intangible asset under development			Total intangible assets
	(INR)			(INR)		(INR)		(INR)		(INR)		(INR)		(INR)			(INR)			(INR)
Cost
As at April 1, 2023		622			32,592		-		36		7		—		11,596			151			45,004
Additions during the year		180			—		—		—		—		626		—			30			836
Transfer/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		-			—		—		—		—		—		—			110			110
Assets held for sale		(29	)		—		—		—		—		—		—			—			(29	)
Disposals and adjustments during the year		(41	)		-		-		-		-		-		-			-			(41	)
Transfer/Capitalised during the year		76			—		—		—		—		—		—			(76	)		-
As at March 31, 2025		932			32,592		-		36		7		626		11,596			91			45,880
Additions during the year		257			-		-		—		—		—		—			—			257
Acquisition through business combination (refer Note 52)		589			-		1,005		—		—		—		5,531			—			7,125
Disposals and adjustments during the year		(46	)		—		—		—		—		—		(37	)		(62	)		(145	)
Transfer/Capitalised during the year		7			—		—		—		—		—		—			(7	)		-
Exchange differences		8			-		76								471			-			555
As at March 31, 2026		1,747			32,592		1,081		36		7		626		17,561			22			53,672

Accumulated amortisation
As at April 1, 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
Charge for the year (refer Note 32)		163			1,415		154		1		—		144		—			—			1,877
Impairment for the year (refer Note 32)		—			—		—		—		—		160		812			—			972
Capitalised during the year		106			—		—		—		—		—		—			—			106
Disposals and adjustments during the year		(32	)										—								(32	)
As at March 31, 2026		745			10,396		154		7		1		471		812			0			12,586

Net book value
As at April 1, 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, 2026 (INR)		1,002			22,196		927		29		6		155		16,749			22			41,086
As at March 31, 2026 (USD)		11			237		10		0		0		2		179			0			438

# Remaining life of customer contracts ranges from 12 to 18 years as on March 31, 2026 (March 31, 2025: 13 to 19 years, March 31, 2024: 14 to 20 years).

* Remaining life of customer relationship is 9 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 impairment testing of Goodwill assigned to each individual or Group of CGUs in this segment as at March 31, 2026 and 2025 by computing their recoverable value 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 12 to 18 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 future forecasts based on past performance for all CGUs. Additionally for wind power plants (applicable for Ostro Energy Group, ReNew Vayu Urja and part of Others), the Group also considered study of future wind speed. Discount rates for all CGUs 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.

The Group computed the recoverable value of CGU on July 1, 2025, the date on which the Group gained the ability to control 3E NV by applying VIU approach. The computation of VIU involved significant assumptions around revenue growth rate and discount rate. The Group used board approved budgets for next five years (upto March 2030) thereafter a terminal growth rate based on business and industry outlook. The Group applied a discount rate based on the weighted average cost of capital. The Group assessed impairment indicators as at March 31, 2026 and in the absence of any indicators, did not undertake a fresh impairment assessment at the year end.

Based on the results of the impairment test, the Group recognized an impairment loss of INR 812 in respect of Ostro Energy CGU, as the carrying amount exceeded its recoverable value. For all other CGUs/ Group of CGUs, the estimated recoverable value was more than their respective carrying values, by the following amounts on the valuation dates: