Estimate potential cash out by multiplying the accepted property value by the program's permitted loan-to-value ratio, then subtracting required mortgage payoffs and costs. Total home equity and available cash are different numbers. Only a lender review can establish your approved amount.
First calculate total equity
For planning, home equity equals estimated property value minus outstanding debts secured by the property. If a home is worth $500,000 and the only mortgage balance is $300,000, the estimated equity is $200,000. That does not mean a lender will allow you to withdraw the full $200,000.
A program's loan-to-value limit leaves a portion of the property's value outside the new loan. The accepted valuation may also be different from an online estimate or what you hope the property would sell for. Keep the valuation estimate and the borrowing limit visible as separate assumptions in your calculations.
Then estimate cash-out refinance proceeds
Use this planning formula: estimated net cash = property value × assumed permitted LTV − required lien payoffs − costs paid from proceeds. Other settlement adjustments can change the final amount. A loan may also be capped by income, credit, program loan limits or other underwriting requirements.
For an illustration only, assume a $500,000 value, an 80% LTV limit, a $300,000 mortgage payoff and $8,000 of transaction costs paid from proceeds. The assumed maximum new loan is $400,000. After the payoff, gross available proceeds are $100,000. Subtract the $8,000 costs and the estimated net cash is $92,000. The 80% assumption and costs are examples, not an offer.
Compare your own scenario
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A HELOC uses combined debt against the property
For a second-lien estimate, combined loan-to-value considers debt secured by the same property. A simple planning calculation is property value × assumed CLTV limit − existing secured debt = preliminary additional borrowing capacity. Underwriting may use the full credit limit of a line, not merely the balance you plan to draw, and program definitions can differ.
Using the same $500,000 value and $300,000 existing mortgage, an assumed 85% combined limit would leave $125,000 of preliminary room: $425,000 minus $300,000. Fees, initial-draw rules, product caps and underwriting can reduce or change what you receive. A credit limit is not automatically the cash deposited at opening.
Test the estimate before relying on it
Small assumption changes can make a meaningful difference. In the refinance example, lowering the accepted property value by $25,000 reduces the assumed maximum loan by $20,000 at an 80% LTV. The estimated net cash falls from $92,000 to $72,000 if the payoff and costs stay the same.
A higher payoff also reduces available cash dollar for dollar. Mortgage payoff figures can include accrued interest and charges beyond the balance on a monthly statement. That is why a planning calculator should use estimated inputs and a final closing statement should use actual payoff instructions and settlement figures.
- Run a lower-value scenario instead of relying on one estimate.
- Include every lien and ask how existing credit lines are treated.
- Keep gross borrowing capacity separate from net cash delivered.
- Add a cost allowance until an actual estimate is available.
- Compare the resulting payment with your own monthly budget.
Turn a calculation into a useful quote
Bring your value estimate, balances and target net cash to The Mortgage Calculator. If you need $60,000 after all costs, say exactly that. Asking for a $60,000 loan increase can produce a different result when fees and payoffs are deducted.
The calculator on this site is an educational planning tool. It does not check credit, verify value or approve a loan. Use its result to frame a conversation, then obtain current terms and a lender-confirmed estimate before making a commitment that depends on the funds.
Frequently asked questions
Is my equity the amount I can borrow?
No. Borrowing limits usually leave some equity in the property, and fees, payoffs and other qualification requirements affect the final amount.
Why is my net cash lower than the loan increase?
Costs, accrued payoff interest, other liens and settlement adjustments may be paid from proceeds before the remaining money is delivered to you.
Does this calculator tell me my approved HELOC limit?
No. It illustrates the effect of your assumptions. Actual limits and draw amounts depend on the lender's valuation, product terms and approval.
Sources & program information
- Fannie Mae: How refinance LTV is calculated
- FTC: Home equity and secured borrowing
- CFPB: Understanding HELOC limits and draws
Content updated November 12, 2026. Program availability and underwriting requirements can change. Confirm your terms with a licensed loan originator.
This guide explains general financing concepts. It does not establish approval, a rate, a tax deduction or the terms available for an individual loan.
