The finance ministry is looking at rationalising long-term capital gains tax structure by bringing parity between similar asset classes and revising the base year for computing indexation benefit to make it more relevant, an official said on Friday. Currently, shares held for more than one year attract a 10 per cent tax on long-term capital gains. Gains arising from sale of immovable property and unlisted shares held for more than 2 years and debt instruments and jewellery held for over 3 years attract 20 per cent long term capital gains tax. The revenue department is now looking at rationalising the tax rates as well as holding period for calculating long-term capital gains and an announcement is likely in the 2023-24 Budget to be presented in Parliament on February 1.