Crypto Lending's Hidden Risk: Understanding Loan-to-Value

Crypto lending has grown to become one of the largest sectors in decentralized finance, with lending protocols holding over $50 billion in total value locked and more than $28 billion in active loans as of September 2026, according to DeFiLlama.

Every loan in this space is based on a single question: how much can a borrower safely draw against the assets they have deposited? This is where loan-to-value (LTV) comes in - it measures the value of outstanding debt compared to the value of the collateral securing it.

LTV is calculated by dividing the borrowed amount by the collateral value and multiplying by 100. For example, if a borrower deposits $10,000 worth of ETH and borrows $5,000 in USDC, their LTV would be 50%.

However, this ratio can shift throughout the life of a loan even when the borrower does nothing. If the collateral's price drops from $10,000 to $8,000, for instance, the same $5,000 loan now represents 62.5% of the collateral's value - moving the borrower closer to the protocol's maximum borrowing limit.

LTV matters for borrowers because it sets their borrowing capacity and how much room they have before liquidation becomes a concern. A lower LTV generally gives borrowers more time to repay debt, add collateral or cut exposure before reaching the liquidation level.