The lock-in period for Tax saving mutual funds is three years. During this time, investors cannot redeem or switch their investment. This mandatory holding period is the shortest among all tax-saving instruments eligible under Section 80C, making tax saving mutual funds attractive for those who want liquidity after a reasonable time frame. Even though the funds are locked in, the invested amount grows based on the fund's performance in equity markets. Investors should plan accordingly and align their financial goals with the lock-in period before choosing such funds.