What is LTV Ratio?

The Loan-to-Value (LTV) ratio is a critical credit risk assessment metric used by mortgage lenders and underwriters to compare the outstanding principal balance of a loan to the fair market value of the property securing that debt. The LTV ratio is calculated by dividing the total mortgage loan amount by the property’s value, which in a purchase transaction is defined as the lesser of the home's appraised value or its actual purchase price. Lenders use the LTV ratio as a primary risk indicator: a higher LTV indicates the borrower has less equity invested in the home, which correlates with a statistically higher probability of default. Consequently, higher LTV ratios typically result in higher interest rates, more stringent credit score overlays, and tighter debt-to-income (DTI) requirements.

For conventional mortgages, an LTV ratio exceeding 80% (meaning a down payment of less than 20%) triggers a requirement for Private Mortgage Insurance (PMI) to shield the lender from default losses. Under the federal Homeowners Protection Act of 1998, conventional borrowers can request PMI cancellation once their principal balance is scheduled to reach or actually reaches 80% LTV of the original property value, and the servicer must automatically terminate it at 78% LTV. In transactions involving multiple home loans, lenders calculate the Combined Loan-to-Value (CLTV) ratio, which incorporates the sum of all liens (such as a first mortgage and a HELOC or second mortgage) divided by the property value. Lenders typically limit CLTV to 80% or 85% to ensure a protective equity buffer remains.