Cash-Out Refinance at 90% LTV: How the Ratio Works

This calculator estimates the maximum cash-out amount implied by a 90% loan-to-value (LTV) limit, using your home’s value and the balance of the mortgage being refinanced. Enter those two amounts to see the maximum new loan and the estimated cash remaining before closing costs; an actual lender’s limit and approval requirements may differ.

Formula

Loan-to-value ratio is the loan amount divided by the property value, multiplied by 100. At a 90% LTV ceiling, the maximum new loan is home value × 0.90. Estimated cash before costs is the maximum new loan minus the existing mortgage payoff, with the displayed estimate floored at zero when the payoff is higher than the modeled loan amount.

• Home value (val): the property value used in the estimate, in dollars.
• Current mortgage payoff (bal): the amount required to pay off the mortgage being replaced, in dollars. It can differ from the balance shown on a recent statement.
• Maximum new loan (loan): 90% of the entered property value, in dollars.
• Estimated cash before costs (cash): the modeled loan amount less the payoff, in dollars, with no closing costs or other debts deducted.
• LTV: the modeled loan divided by the entered home value, expressed as a percentage.

Worked Example

Using the calculator’s default values:

1. Home value = $400,000; mortgage payoff = $250,000.
2. Maximum loan at 90% LTV = $400,000 × 0.90 = $360,000.00.
3. Estimated cash before costs = $360,000 − $250,000 = $110,000.00.
4. Modeled LTV = $360,000 ÷ $400,000 × 100 = 90.00%.

The $110,000 is not a promise of cash proceeds. It is a simple difference before costs, underwriting adjustments, and any other amounts included in a transaction.

Assumptions

• The 90% LTV ceiling is a scenario entered into the calculation, not a statement that a lender offers or permits that limit.
• The property value and payoff are assumed accurate and in dollars; the calculator does not independently verify either figure.
• No interest rate, payment schedule, or compounding assumption is used because this is an LTV and equity calculation, not a monthly-payment calculation.
• Closing costs, taxes, insurance, escrow, mortgage insurance, other liens, and any lender-specific adjustments are not included.

What 90% LTV Means for a Cash-Out Refinance

A cash-out refinance replaces an existing mortgage with a new mortgage. In a cash-out transaction, the new loan may be larger than the amount needed to pay off the old mortgage, and the difference can be disbursed to the borrower after applicable costs and requirements. The LTV ratio compares the new loan amount with the property value used for the transaction.

At 90% LTV, a modeled $100,000 property value supports a $90,000 loan under the arithmetic alone. That does not mean $90,000 is available as cash: the existing mortgage must be paid off first, and other costs or debts may reduce proceeds. The calculator therefore separates the modeled maximum loan from estimated cash before costs.

There is no universal rule that every cash-out refinance can go to 90% LTV. A lender may set a lower maximum or use different requirements based on the transaction, property, borrower, loan purpose, and its own policies. Ask the lender what maximum applies and how it defines value and loan amount for your situation.

What Can Change the Cash Proceeds

The most important inputs are the property value and the payoff figure. If a valuation used in a transaction is lower than your estimate, the loan amount calculated at 90% will also be lower. For example, a $360,000 loan is 90% of a $400,000 value, but it is 100% of a $360,000 value. A change in value can therefore materially change the ratio and the modeled amount.

The payoff amount may include accrued interest or other items not reflected in the principal balance on a monthly statement. Any additional liens that must be addressed, transaction expenses, or amounts rolled into the new mortgage can also affect cash paid out or the final loan balance. Get a current payoff quote and a written breakdown of the proposed transaction rather than treating the calculator’s cash figure as net proceeds.

Also distinguish the loan’s LTV from combined loan-to-value (CLTV). LTV generally compares one mortgage with the property value; CLTV can account for other loans secured by the property. If a second mortgage or home-equity line remains in place, ask the lender which ratio it will calculate and whether the other debt changes the transaction.

How to Use the Estimate Carefully

• Enter a property value that is plausible for the lender’s valuation method, not simply the purchase price or an informal estimate.
• Use a current payoff quote for the mortgage to be replaced, rather than relying only on the principal balance.
• Read the first result as a hypothetical loan ceiling at exactly 90% LTV, not as an approval or a lender offer.
• Subtract estimated transaction costs and any other amounts that will be paid from proceeds to approximate cash after costs. Use figures supplied by the lender for that separate estimate.
• Ask for the proposed loan amount, LTV or CLTV calculation, itemized costs, and estimated cash to borrower in writing.

Rounding can cause small differences in a displayed ratio or amount. This calculator rounds money to cents and LTV to two decimal places, but lenders may calculate with unrounded figures or apply their own valuation and underwriting methods.

Frequently Asked Questions

Can you get a cash-out refinance at 90% LTV?
It depends on the lender and the details of the transaction. A 90% figure is a scenario for this calculator, not a universal eligibility limit or a guarantee that a lender will approve a loan at that ratio.

How much cash can I get at 90% LTV?
In this estimate, multiply the home value by 0.90, then subtract the mortgage payoff. The result is before closing costs, other liens, and other adjustments, so it may exceed the cash actually disbursed.

Does 90% LTV mean I receive 90% of my home’s value?
No. It means the modeled new loan equals 90% of the property value. The old mortgage and any applicable costs must be accounted for before calculating cash proceeds.

Is LTV based on my home’s purchase price or its current value?
The value used can depend on the lender’s transaction process and valuation. Do not assume the original purchase price or a personal estimate will be used; ask the lender which value applies.

Are closing costs included in the cash-out estimate?
No. The calculator subtracts only the current mortgage payoff from the modeled loan amount. Costs and other deductions require separate figures from the lender.

What is the difference between LTV and CLTV?
LTV compares a mortgage amount with the property value. CLTV may include other loans secured by the home as well, so a second mortgage or home-equity line can affect the lender’s calculation.

This result is an estimate for education, and the lender’s disclosure gives the exact figures.

Related

• Line Balance Diagram: Meaning and How It Works
• Line Balance Efficiency: Formula and Calculator
• Line Balance Art? Meaning, Methods, and Examples

in val | Home value | $ | 400000 | 1 | 100000000
in bal | Current mortgage payoff | $ | 250000 | 0 | 100000000
out loan | Maximum new loan at 90% LTV | $ | val * 0.9 | 2
out cash | Estimated cash before costs | $ | max(0, loan - bal) | 2
out ltv | Loan-to-value ratio | % | loan / val * 100 | 2