How to Calculate Your Cash-Out Refinance Amount (With Real Numbers)

The Four Variables That Control Your Cash-Out Amount

Every cash-out refinance calculation runs on the same four inputs. Get any one of them wrong and your projected proceeds are fiction.

1. Appraised value. Lenders use a licensed appraisal, not Zillow. The appraised value sets the ceiling for everything that follows. Assume your Zestimate is wrong by at least 5% to 10% in either direction until a formal appraisal confirms otherwise.

2. Maximum loan-to-value ratio (LTV). Most conventional lenders allow a maximum LTV of 80% on cash-out refinances. VA loans permit up to 90% for eligible borrowers. FHA cash-out allows up to 80% as of current guidelines. The LTV cap applied to appraised value produces your maximum allowable new loan balance.

3. Current payoff balance. This is not your original loan amount. It is the exact dollar figure required to retire your existing mortgage on the closing date, including any prepayment interest. Call your servicer for a 30-day payoff quote.

4. Closing costs. These are paid from your proceeds before you see a cent. On a $480,000 new loan, closing costs at 3% total $14,400. That amount comes directly off your cash.

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The Core Formula

The calculation is four steps.

Step 1. Multiply appraised value by the lender's maximum LTV to get your maximum new loan balance.

Step 2. Subtract your current mortgage payoff balance from the maximum new loan balance. This is your gross available cash before costs.

Step 3. Subtract estimated closing costs from the gross available cash. This is your net cash proceeds.

Step 4. Confirm the new monthly payment is serviceable at the new interest rate before committing.

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Worked Example 1: Standard Conventional Refinance

A homeowner in Atlanta owns a property that appraises at $580,000. Her current mortgage payoff balance is $310,000. Her lender offers a 30-year fixed rate at 6.875% with an 80% LTV cap. Closing costs are estimated at 2.8% of the new loan.

Step 1: Maximum new loan $580,000 x 0.80 = $464,000

Step 2: Gross cash available $464,000 minus $310,000 = $154,000

Step 3: Subtract closing costs $464,000 x 0.028 = $12,992 in closing costs $154,000 minus $12,992 = $141,008 net cash proceeds

Step 4: New monthly payment A $464,000 loan at 6.875% over 30 years produces a principal and interest payment of approximately $3,047 per month.

Her current payment on the $310,000 balance, assuming a 3.25% rate with 22 years remaining, is roughly $1,847 per month. The refinance increases her monthly obligation by $1,200. She needs to confirm that the use of $141,008 justifies $1,200 per month in additional debt service, or roughly $14,400 per year.

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Worked Example 2: VA Cash-Out Refinance

A veteran in San Diego owns a home that appraises at $820,000. His payoff balance is $490,000. His VA loan allows up to 90% LTV. The VA funding fee is 3.6% of the new loan for a subsequent use cash-out refinance, and the lender charges 1.5% in additional closing costs.

Step 1: Maximum new loan $820,000 x 0.90 = $738,000

Step 2: Gross cash available $738,000 minus $490,000 = $248,000

Step 3: Subtract total costs VA funding fee: $738,000 x 0.036 = $26,568 Additional closing costs: $738,000 x 0.015 = $11,070 Total costs: $37,638

$248,000 minus $37,638 = $210,362 net cash proceeds

The funding fee changes everything. A veteran who skipped this calculation and assumed he would receive roughly $248,000 would be short by $37,638. That gap affects every downstream decision, from how much debt to retire to how large a renovation budget he can actually fund.

Note: Eligible veterans with a service-connected disability rating of 10% or higher are exempt from the VA funding fee entirely. That exemption is worth $26,568 in this scenario.

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Why Your Gross Equity Number Is Misleading

Homeowners instinctively calculate equity as market value minus mortgage balance. On the Atlanta example above, that figure is $580,000 minus $310,000, or $270,000.

The actual cash she receives is $141,008. That is 52.2 cents on the equity dollar.

The gap comes from three sources: the 20% LTV retention requirement ($116,000 held back), closing costs ($12,992), and the discipline of using the appraised value rather than an inflated estimate. Every one of those reductions is real and predictable. None of them is optional.

Gross equity is useful for one thing: confirming you have enough cushion to meet the LTV threshold. It is not a reliable proxy for what you will receive at closing.

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How the Appraisal Changes Your Proceeds

A 5% variance in appraised value produces significant changes in available cash. Consider a home the owner believes is worth $600,000.

If the appraisal comes in at $570,000 instead: Maximum new loan drops from $480,000 to $456,000, a reduction of $24,000 in potential proceeds.

If the appraisal comes in at $630,000: Maximum new loan rises to $504,000, adding $24,000 to available proceeds.

On a $570,000 appraisal at 2.8% closing costs, that $24,000 reduction also saves $672 in closing cost fees. The net impact of a $30,000 downward appraisal variance is approximately $23,328 in reduced cash proceeds.

Order the appraisal before you plan for the money. Do not plan for the money and then hope the appraisal confirms it.

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When a Lender Quote Differs From Your Calculation

Three common reasons exist for discrepancies between your math and a lender's quote.

Different LTV floor. Some lenders apply a 75% LTV cap for investment properties or for borrowers with credit scores below 700. This materially lowers the maximum loan.

Escrow impounds. If your lender requires an upfront escrow reserve for property taxes and insurance, that reserve draws from your proceeds at closing. Ask for the escrow impound line item specifically.

Points and origination fees. A lender quoting a lower rate may charge 1.5 to 2 discount points. At 1.5 points on a $464,000 loan, that is $6,960 off your net proceeds. Compare offers on APR, not rate alone.

Run the same four-step formula against every lender quote you receive. The inputs change. The structure of the calculation does not.

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The Break-Even Test Before You Commit

Cash-out refinances carry real costs. Before proceeding, calculate two break-even figures.

Rate break-even. If your new rate exceeds your current rate, divide the total closing costs by the monthly payment increase. That is the number of months required for cash-in-hand to offset the higher debt service. If the break-even exceeds your expected holding period, the economics do not work.

Cash deployment break-even. The cash you receive must generate a return greater than the after-tax cost of the new debt. At 6.875% on a 30-year mortgage, with a marginal tax rate of 32%, the after-tax cost of that debt is approximately 4.68% for itemizers. Any use of proceeds that generates less than 4.68% annually is net-negative against the cost of the loan.

Home renovations that demonstrably increase appraised value, debt retirement on obligations carrying rates above 6.875%, and taxable investment accounts with long-term expected returns above 4.68% all clear that threshold with varying degrees of certainty.

Paying off a 24.99% credit card balance with cash-out proceeds clears the threshold by 20.31 percentage points. Funding a vacation does not clear it at all.

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Run Your Numbers Before You Call a Lender

The calculation above takes four inputs and four steps. The CalcMoney mortgage calculator applies current rate assumptions, lets you adjust the LTV threshold, and models your new monthly payment against your existing one in real time.

Enter your appraised value, your current payoff balance, your state, and your credit score range. The calculator returns your maximum cash proceeds, estimated closing costs, net disbursement, and new monthly payment side by side with your current obligation.

That output gives you a position before the first lender conversation. You arrive knowing your ceiling, your floor, and the monthly cost of every dollar in between.

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