The Short Answer
Loan-to-value ratio (LTV) compares the size of your loan to the value of the home it’s secured against, expressed as a percentage. A lower LTV means you’re borrowing less relative to the home’s worth — and lenders see that as less risky. LTV is a key number lenders use when deciding whether to approve your mortgage, what interest rate to offer, and whether you’ll need to pay private mortgage insurance.
In short, LTV measures how much of the home you’re financing versus how much you own outright.
How to Calculate LTV
The formula is simple:
- LTV = loan amount ÷ home value.
- Use the lower of the purchase price or the appraised value as the home value.
- Multiply by 100 to express it as a percentage.
- A bigger down payment means a smaller loan and a lower LTV.
A Simple Example
Example: You’re buying a $300,000 home and putting $60,000 down, so you borrow $240,000. Your LTV is $240,000 ÷ $300,000 = 0.80, or 80%. That 20% down payment is significant: at 80% LTV or below, many conventional loans don’t require private mortgage insurance. If you’d put only $15,000 down, your loan would be $285,000 and your LTV 95% — higher risk to the lender, and likely PMI on top.
Why Lenders Care About LTV
LTV is one of the clearest measures of lending risk:
- Lower LTV = lower risk. More of your own money is in the home, so the lender is better protected.
- It affects your rate. A lower LTV can earn a lower interest rate.
- It triggers (or avoids) PMI. Many conventional loans require private mortgage insurance above 80% LTV.
- It affects approval. Very high LTVs are harder to get approved and may need special loan programs.
How LTV Changes Over Time
Your LTV isn’t fixed forever. As you pay down your mortgage, your loan balance shrinks and your LTV drops. If your home’s value rises, your LTV falls too. This matters because once your LTV reaches 80% (or 78% automatically, under certain rules), you may be able to cancel private mortgage insurance — saving money each month. Tracking your LTV can tell you when to ask.
The Bottom Line
Loan-to-value ratio compares your loan to your home’s value as a percentage — calculated by dividing the loan amount by the home value. A lower LTV signals less risk to lenders, which can mean a better interest rate and no private mortgage insurance. A larger down payment lowers your LTV from the start, and paying down the loan or rising home values lower it over time. It’s a number worth watching as a homeowner.
Frequently Asked Questions
What is loan-to-value ratio in simple terms?
It’s the size of your loan compared to your home’s value, shown as a percentage. An 80% LTV means you’re borrowing 80% of the home’s value and have 20% in equity from your down payment.
How do I calculate LTV?
Divide your loan amount by the home’s value (use the lower of price or appraisal), then multiply by 100. A $240,000 loan on a $300,000 home is an 80% LTV.
What is a good LTV ratio?
An LTV of 80% or below is often considered good because it can avoid private mortgage insurance and earn better rates. Lower is generally better from the lender’s risk perspective.
How does LTV affect mortgage insurance?
Many conventional loans require private mortgage insurance (PMI) when LTV is above 80%. As your LTV falls to 80% (or 78% automatically under certain rules), you may be able to drop PMI.
Does LTV change over time?
Yes. Paying down your loan lowers your balance and your LTV, and rising home values lower it too. A falling LTV can let you cancel PMI or qualify for better refinancing terms.
How can I lower my LTV?
Make a larger down payment when buying, pay extra toward principal over time, or benefit from rising home values. Each reduces your loan relative to the home’s value, lowering your LTV.
This article is for educational purposes only and is not financial, legal, or tax advice. Loan terms, rates, and rules vary by lender and situation. For guidance on your own mortgage, consult a qualified lender or housing counselor.