Equity Linked Saving Scheme or ELSS is a type of mutual fund scheme that primarily invests in the stock market or Equity. Investments of up to 1.5 Lac done in ELSS Mutual Funds are eligible for tax deduction under section 80C of the Income Tax Act. The advantage ELSS has over other tax Saving instruments is the shortest lock-in period of 3 years. This means you can sell your investment only after 3 years, from the date of purchase! However to maximise returns from ELSS funds, it is recommended to keep your investments intact for the maximum duration possible. If you have an ELSS SIP (Systematic Investment Plan), each instalment has a lock-in period of three years, which means each of your instalments will have a different maturity date.