Property or an asset pledged by a borrower to a lender as security for a loan, forfeitable if the debt is not repaid.
Lending without security is risky. A lender extends money to a borrower and must trust that they will see it returned. In a world of perfect information and enforceable contracts, lending could rely on the borrower’s future income and reputation alone. But history and present reality show that people default, businesses fail, and promises are broken. To bridge that gap between trust and certainty, lenders have long demanded collateral.
Collateral is any asset a borrower pledges to a lender as security for a loan. If the borrower defaults, the lender has the legal right to seize and sell the collateral to recover the outstanding debt. The asset might be a house, a vehicle, inventory, equipment, stocks, bonds, or intellectual property. What matters is that it has a market value that can be liquidated. Collateral converts an unsecured loan, where the lender has only a claim against the borrower’s future income and assets generally, into a secured loan, where the lender has a specific claim against a specific asset.
The presence of collateral fundamentally changes the terms of credit. A borrower with collateral can typically borrow at a lower interest rate, for a longer term, and in a larger amount than someone offering only their personal promise. This is because the lender’s risk is reduced. If repayment fails, they are not standing in line with all other creditors. They have a prior claim on the pledged asset. Yet collateral does not eliminate lending risk, only shifts it. If the asset’s value falls below the loan amount, the lender becomes exposed again. If the collateral is illiquid or difficult to value, the lender’s claim may be worth less in practice than it appears on paper.
Collateral quality matters. Finance professionals evaluate potential collateral using the MAST framework: whether it is Marketable (does an active market exist for it), Ascertainable (can its price be easily determined), Stable (does its value hold over time), and Transferable (can it be sold without friction). Real estate scores high on marketability and stability but low on transferability; stocks are highly liquid and transferable but volatile. The better a piece of collateral scores on these dimensions, the more favorable the loan terms it can command.
Source: Corporate Finance Institute, Commercial Lending Standards (2026); financial industry best practices for secured lending.