Cash-Out Refinance vs. HELOC Calculator

Need to borrow against your home's equity but not sure whether a cash-out refinance or a home equity line of credit (HELOC) is the cheaper path? Both tap the same equity in very different ways. Use the calculator below to model the new loan payment either option creates and compare the numbers before you apply.

Cash-Out Refinance vs. HELOC: What's the Real Difference?

A cash-out refinance replaces your entire existing mortgage with a new, larger loan — you borrow more than you currently owe and receive the difference in cash at closing. From that point forward, you have one loan, at one interest rate (usually fixed), amortizing over a new term.

A HELOC leaves your existing first mortgage completely untouched and adds a separate, second loan secured by your remaining equity. Most HELOCs work like a credit card: you draw against a credit line as needed during a "draw period," typically pay interest-only during that time, and then repay the outstanding balance during a separate "repayment period." HELOC rates are usually variable.

The practical difference: a cash-out refinance replaces one loan with a single larger loan at (usually) a fixed rate, while a HELOC stacks a flexible, usually variable-rate second loan on top of the mortgage you already have.

Key Differences Between the Two Options

• Number of Loans: A cash-out refinance leaves you with one mortgage; a HELOC leaves you with your original mortgage plus a second loan.
• Rate Type: Cash-out refinances are typically fixed-rate; HELOCs are typically variable-rate, so the payment can change over time.
• Access to Funds: A cash-out refinance disburses one lump sum at closing; a HELOC gives you a revolving credit line you can draw from repeatedly, similar to a credit card.
• Effect on Your First Mortgage Rate: A cash-out refinance replaces your original rate entirely — if your current mortgage rate is lower than today's rates, refinancing means giving that rate up on your entire balance, not just the cash-out portion.
• Closing Costs: Cash-out refinances generally carry closing costs similar to a full mortgage (often 2-5% of the loan amount); many HELOCs have lower upfront costs.
• Flexibility: A HELOC's draw period lets you borrow only what you need, when you need it, and pay interest only on the amount actually drawn — a cash-out refinance requires you to borrow the full amount up front, whether you use it immediately or not.

How to Use This Calculator to Compare Both Options

1. Model the Cash-Out Refinance

Enter your new, larger loan amount (your current mortgage balance plus the cash you want to receive), the rate your lender quotes for the new full mortgage, and your new loan term. The results show your new combined monthly payment for the entire mortgage going forward.

2. Compare Against Your Current Mortgage Payment

Run the numbers again using just your current mortgage balance and current rate — this is your baseline. The difference between this and step 1 is what the cash-out refinance actually costs you every month.

3. Estimate the HELOC's Separate Payment

A HELOC is a second, independent loan, so model it separately: run the calculator using just the amount you'd draw from the HELOC as the loan amount, the HELOC's rate, and a term matching its repayment period. Add this payment on top of your existing, unchanged mortgage payment to see the true combined cost of keeping both loans.

4. Compare the Two Total Monthly Costs

Add your current mortgage payment plus the modeled HELOC payment, and compare that combined total against the new cash-out refinance payment from step 1. The lower combined monthly total — while accounting for the rate type risk described below — points toward the more affordable option for your situation.

Which Should You Choose?

A cash-out refinance tends to make sense when today's mortgage rates are close to or below your current rate, you want the predictability of a single fixed-rate loan, or you need a large lump sum for a one-time expense.

A HELOC tends to make sense when your current mortgage already has a much lower rate than today's rates (so refinancing the whole balance would be costly), you only need to borrow incrementally over time rather than all at once, or you want to preserve the option to draw more later without a second application.

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Tips for Comparing Home Equity Options

1. Check Your Current Rate First: If your existing mortgage rate is well below current market rates, a cash-out refinance may cost you more in the long run than a HELOC, even with a higher HELOC rate on just the new amount.
2. Ask About HELOC Rate Caps: Since HELOC rates are usually variable, ask your lender for the maximum rate the line could reach, and re-run your numbers at that worst-case rate.
3. Compare Total Closing Costs, Not Just Rates: A cash-out refinance's higher closing costs can offset rate savings on a smaller cash-out amount.
4. Match the Tool to the Need: A one-time expense (debt consolidation, a large renovation with a fixed budget) often fits a cash-out refinance better; an ongoing or uncertain expense (a phased renovation, tuition paid over several years) often fits a HELOC's draw flexibility better.

Common Mistakes to Avoid

• Ignoring Your Existing Rate: Refinancing your entire mortgage to access a relatively small amount of cash can mean losing a much lower rate on your whole existing balance.
• Comparing a Fixed Rate to a HELOC's Introductory Rate: Many HELOCs advertise a low introductory rate — compare against the fully-indexed variable rate that applies after any introductory period ends.
• Forgetting the HELOC's Repayment Period: Interest-only payments during the draw period can be misleadingly low; the payment typically rises once principal repayment begins.
• Overlooking Draw Period Discipline: A HELOC's revolving nature makes it easy to draw more than originally planned — model your numbers based on the amount you actually intend to use, not just the full credit limit offered.

Conclusion

Both options let you convert home equity into cash, but they do it through very different loan structures with different rate types and repayment mechanics. Model your current mortgage, a full cash-out refinance, and a standalone HELOC through the calculator above so you're comparing real combined monthly costs — not just headline rates — before deciding which path to take.