The loan-to-value (LTV) ratio is a financial term used by commercial lenders to express the ratio of a loan to the value of an asset purchased. The term is commonly used by banks and building societies to represent the ratio of the first mortgage lien as a percentage of the total appraised value of real property. For instance, if a someone borrows $130,000 to purchase a house worth $150,000, the LTV ratio is $130,000 to $150,000 or $130,000/$150,000, or 87%.