Find a Loan-to-Value Calculator for Your Country

The loan-to-value ratio, commonly shortened to LTV, compares the amount of borrowing secured against a property with the property value accepted by the lender. It provides a quick way for lenders and borrowers to understand how much of the property is financed and how much is covered by the borrower’s own equity.

LTV is used when purchasing a home, refinancing an existing mortgage or applying for additional borrowing secured against a property. The calculation is simple, but the way lenders interpret the result varies by country, lender and mortgage programme.

How Is Loan-to-Value Calculated?

The standard formula is:

LTV = secured loan amount ÷ accepted property value × 100

For example, if a buyer wants to borrow 240,000 toward a home valued at 300,000:

240,000 ÷ 300,000 × 100 = 80% LTV

The loan represents 80% of the property’s stated value. If there are no other secured debts, the remaining 20% represents the buyer’s gross equity before fees or selling costs.

The US Consumer Financial Protection Bureau describes LTV as the amount financed compared with the property’s appraised value and notes that the ratio may affect loan availability, pricing and mortgage insurance.

Which Property Value Is Used?

The property value used in the calculation matters because it forms the denominator. A borrower may know the purchase price or an estate agent’s estimate, but lenders may rely on an appraisal, automated valuation model, survey or another method permitted under local rules.

Some mortgage programmes use the lower of the purchase price and appraised value in certain circumstances. This is not a universal rule, so applicants should confirm the definition used by their lender.

Different valuation methods can produce different figures. The CFPB’s valuation guidance explains that appraisals, automated models and other estimates may not match.

A calculator can estimate LTV from the figures entered, but it cannot determine which value a lender will accept during underwriting.

LTV, Combined LTV and Home-Equity Credit Lines

A basic LTV calculation compares one secured loan with the property value. When several loans are secured against the same property, lenders may calculate a combined loan-to-value ratio (CLTV).

CLTV = total outstanding secured loan balances ÷ property value × 100

For example, if a property is valued at 300,000 and has a 210,000 first mortgage plus a 30,000 second secured loan:

(210,000 + 30,000) ÷ 300,000 × 100 = 80% CLTV

Treatment of home-equity credit lines varies. Some underwriting systems use the outstanding balance, while others use the full authorised credit limit.

For example, Fannie Mae’s US guidance uses the full credit-line amount when calculating its home-equity combined loan-to-value ratio. This is a US-specific example rather than a global rule.

How a Deposit or Down Payment Changes LTV

On a property purchase, a larger deposit generally means a smaller loan and therefore a lower LTV. For a property valued at 300,000, the relationship might look like this:

Lower LTV can reduce lender exposure because the loan is supported by a larger equity margin. Depending on the mortgage market, it may also affect interest rates, product availability, fees or mortgage-insurance requirements.

How LTV Relates to Home Equity

LTV and equity describe opposite sides of the same relationship. If all secured debt is included and no transaction costs are deducted, the approximate equity percentage is:

Equity percentage ≈ 100% − combined LTV

A home with an 80% combined LTV has approximately 20% gross equity. This is only an estimate: selling costs, early-repayment charges, unpaid interest and changes in market value can alter the amount the owner would actually receive.

If total secured debt exceeds the property value, the combined LTV is above 100%, indicating negative gross equity.

Where Is LTV Used?

Buying a property

Buyers use LTV to compare the size of a proposed mortgage with the accepted property value and to see how different deposit amounts change the proportion financed.

Mortgage pricing

Lenders may group products into LTV bands. Moving into a lower band can sometimes change the rate, fee or insurance requirements, although thresholds differ among lenders.

Refinancing

During refinancing, the latest accepted property value and the balance of the replacement loan are used to calculate a new LTV. Changes in either figure can affect available products.

Second mortgages and secured borrowing

When another loan will share the same property as security, lenders may review both the individual loan’s LTV and the combined effect of all secured debts.

What Does a Lender Learn from LTV?

LTV indicates how much value may remain between the secured debt and the property’s estimated worth. A higher ratio generally leaves a smaller margin if property prices fall or the lender must recover the debt through a sale.

However, LTV describes the lender’s security position; it does not show whether the borrower can comfortably make payments. Income, expenses, credit history, interest rates, loan term and other debts are evaluated separately.

The CFPB’s regulatory definition of combined loan-to-value ratio notes that LTV is only one factor in a credit decision.

Is There a Good Loan-to-Value Ratio?

No single LTV percentage has the same consequences in every mortgage market. Acceptable ratios depend on local regulations, lender policy, property type, borrower circumstances and whether a guarantee or mortgage-insurance programme applies.

In general, a lower LTV means a larger share of the property is funded by the borrower. This may improve access to some products, but it does not guarantee approval or confirm affordability.

Country-Specific Rules Still Matter

Mortgage terminology and underwriting practices differ worldwide. Countries vary in how they treat deposits, appraisals, mortgage insurance, second liens, refinancing, taxes and affordability checks.

Use an LTV calculation as a planning tool, then confirm the applicable value, debt balances and lending thresholds with a regulated lender or qualified adviser in the country where the property is located.