Loan-to-Value Ratio

The loan-to-value ratio is one of the most important metrics in real estate lending. It measures how much of the property's value is being financed with debt versus the borrower's equity. An LTV of 80% means the loan is 80% of the property's value and the borrower has contributed a 20% down payment.

Lenders use LTV to gauge collateral risk. A lower LTV means the lender has a larger equity cushion protecting it against losses if the borrower defaults and the property must be sold. If property values decline by 15%, a lender at 65% LTV is still fully covered; a lender at 90% LTV faces a potential shortfall.

For residential mortgages in the US, conventional loans require a maximum LTV of 80% to avoid private mortgage insurance (PMI). FHA loans allow LTVs up to 96.5% with mortgage insurance premiums. VA and USDA loans permit up to 100% LTV for qualifying borrowers. Jumbo loans and second mortgages typically carry stricter LTV limits than conforming loans.

For commercial real estate loans, LTV limits are generally more conservative — commonly 65% to 75% — reflecting the greater income volatility, tenant concentration risk, and illiquidity of commercial properties relative to residential real estate.

LTV is also used in the context of home equity lines of credit (HELOCs) and cash-out refinances, where the combined LTV (the total of all debt on the property relative to value) determines how much additional borrowing is available.

Property value can be established through a formal appraisal, an automated valuation model (AVM), or the purchase contract price, depending on the loan type and lender requirements. In refinance transactions, an updated appraisal determines the current LTV, which may have shifted substantially from origination if values have risen or fallen.