Real Estate & Mortgages
Basic

Loan-to-Value Ratio

Loan size as a percentage of property value.

Formula

LTV=LV×100LTV = \frac{L}{V} \times 100

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Variables

LTVLoan-to-value (%)
LLoan amount
VProperty value

Example

$240k loan on $300k home: LTV = 80%

How it works

The loan-to-value ratio compares how much money is borrowed against a property with the property’s appraised or purchase value. Multiplying by 100 turns the fraction into a percentage, so you can quickly see what share of the property is being financed by debt. Lenders use it because a lower LTV usually means less risk: if the borrower defaults, there is more property value available to cover the loan.

When to use it

Use this when applying for a mortgage, refinancing, or checking whether a property purchase meets a lender’s borrowing rules. It is also useful for estimating when private mortgage insurance might be required and for comparing how much equity is in a home.

Worked example, step by step

A buyer takes out a $180,000 mortgage on a house valued at $225,000. LTV = (L / V) × 100 LTV = (180,000 / 225,000) × 100 LTV = 0.8 × 100 LTV = 80% So the loan-to-value ratio is 80%.

Common mistakes to avoid

  • using the monthly payment instead of the total loan amount
  • dividing by the loan amount instead of the property value
  • forgetting to convert the result to a percentage by multiplying by 100

Did You Know?

Lenders often require mortgage insurance above 80% LTV — the borrower has less 'skin in the game'.

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Reviewed & maintained by the FormulaWon editorial teamLast reviewed September 2026