What is a loan-to-value ratio?

Key takeaways

  • Your loan-to-value (LTV) ratio is the principal of your mortgage loan divided by the value of the property you're buying, usually expressed as a percentage.

  • A lower LTV ratio can help you get a lower interest rate on your mortgage.

  • Lenders set a maximum LTV ratio for the home loans they issue.

If you’re applying for a mortgage, you have plenty of numbers swirling in your brain: interest rates, closing costs, your debt-to-income ratio and more. One of the key numbers to add to the mix is the loan-to-value ratio, or LTV ratio. This ratio affects whether a lender will approve you for a loan and for how much. Here’s everything you need to know about the LTV ratio.

What is the loan-to-value (LTV) ratio?

First, what is LTV in real estate? Your loan-to-value ratio is how much money you’re borrowing, also called the loan principal, divided by how much the property you want to buy is worth, or its value. An LTV ratio is usually expressed as a percentage.

When you apply for a mortgage, your lender will factor in your LTV ratio when deciding whether to approve you for the loan. If it offers you a loan, the lender will also consider your LTV ratio when determining the loan size and your interest rate.

So, what’s a good loan-to-value ratio? From a lender’s perspective, a lower LTV ratio is better than a higher one because it indicates that a loan applicant can make a larger down payment and won’t have to borrow as much money.

How to calculate a loan-to-value ratio

To calculate your LTV ratio, you’ll first need to subtract your down payment from your home’s appraised value. Then, divide that figure by the appraised value and multiply it by 100. Here’s how that formula would look:

Calculator

(Home’s appraised value – down payment) ÷ Appraised value x 100 = LTV ratio

Let’s say, for example, that you plan to borrow $450,000 for a mortgage on a $500,000 house (assuming you’re putting 10 percent, or $50,000, down). Your LTV ratio — $450,000 divided by $500,000, multiplied by 100 — would be 90 percent.

Why lenders look at LTV during the mortgage process

Before a bank or lender approves your mortgage application, the lender’s underwriting department needs to be confident you can pay the loan back.

Loan-to-value ratio is one piece of the puzzle here. Lenders like a low LTV ratio, meaning having equity in the house from the outset. This lowers your likelihood of ending up underwater on your mortgage and defaulting on the loan. Lenders are more likely to approve your loan with a low LTV ratio.

In addition to the LTV ratio, lenders look at your debt-to-income (DTI) ratio to evaluate your overall financial picture. There are two types of DTI: a front-end ratio and a back-end ratio. Between the mortgage LTV and DTI ratios, if the lender deems you a greater risk, you’ll likely pay a higher interest rate, which translates to paying more money over the life of the loan.