Earnest money is a monetary deposit paid by bidders to show their sincerity and good faith in a project. It aims to prevent bidders from withdrawing their bids before the validity period ends. Standard earnest money amounts are 2% of the estimated project cost for works costing up to Rs. 10 crores, and 1% of estimated cost plus Rs. 20 lakhs for higher value projects. Earnest money is refunded once the contract is awarded, or forfeited if the bidder withdraws during the validity period. The document discusses earnest money definitions, forms, amounts, refund processes, and treatments under different scenarios.