54EC bonds are capital gains tax-exemption bonds issued by government-backed entities—specifically the National Highways Authority of India (NHAI) and the Rural Electrification Corporation (REC)—that allow investors to save Long-Term Capital Gains (LTCG) tax on the sale of immovable property. Under Section 54EC of the Income Tax Act, an investor can invest up to ₹50 lakh in these bonds within six months of the property sale and claim full exemption on the LTCG amount invested. The bonds have a mandatory lock-in period of five years, carry a fixed interest rate, and are backed by sovereign-linked institutions, making them a low-risk tax-planning instrument for property sellers in India.