Final Additional Bonus is a discretionary loyalty bonus that LIC and other insurers pay at maturity on policies that have run for a sufficient minimum term (typically 15+ years). It's expressed per ₹1,000 of Sum Assured and is meant to share in the longer-term investment surplus.
FAB rates are not declared annually — only the rate applicable to maturing policies in the current year is published. For LIC endowment plans, FAB has historically ranged from ₹100–₹600 per ₹1,000 SA depending on policy term and entry year.