If I want to switch from regular to direct mutual fund plan, then do I have to pay LTCG tax?

Switching from regular to direct mutual fund plan basically involves redemption of a regular plan and purchase a direct plan. So, if so if there are any capital gains and the total capital gains exceed the permissible limit of Rs. 1 Lakh for the financial year, then Long-term Capital Gain (LTCG) tax would be applicable. So if your capital gain is 2.5 lakhs then your LTCG tax will be only applicable to 1.5 lakhs as 1 lakh is exempted.

I hope I have answered your answer, happy investing!