Cash-Out Refinance vs HELOC: Which Is Cheaper for Your Situation

You need $60,000 for a kitchen and bathroom renovation. You have equity in your home. Now you're deciding between a cash-out refinance and a HELOC — and the lender is pushing hard for the cash-out option.

Before you follow that advice, understand the core question: how much does each option actually cost? The answer may surprise you, especially if your first mortgage has a rate below 4%.

What Each Option Does

Cash-out refinance: You replace your existing mortgage with a larger one. The difference between your old balance and the new loan amount is paid to you in cash at closing. You end up with one loan, one payment, and a reset amortization schedule.

HELOC (Home Equity Line of Credit): You keep your existing mortgage completely untouched and add a second lien. The HELOC is a revolving credit line secured against your equity. Rates are variable (typically prime-indexed), and you only pay interest on what you draw.

Rate-and-term refinance: For context, this is a refinance that changes only the rate or term — no cash extraction. It's the cleanest type of refinancing because you're not changing the loan balance or purpose.

The Blended Rate Calculation: The Key Math

If you hold a first mortgage at 3.0% and you need $60,000, here's the calculation that actually matters:

Option A — Cash-out refinance at 6.75%: You replace your entire first mortgage (say $280,000) plus add $60,000, for a new balance of $340,000 at 6.75%. Your entire debt is now costing 6.75% per year.

Option B — Keep first mortgage at 3.0%, add HELOC at 9.0%: $280,000 continues at 3.0%. $60,000 is borrowed via HELOC at 9.0%.

Blended rate calculation: ($280,000 × 3.0% + $60,000 × 9.0%) ÷ $340,000 = ($8,400 + $5,400) ÷ $340,000 = $13,800 ÷ $340,000 = 4.06%

Despite the HELOC costing 9.0%, the blended rate of the two-loan structure is 4.06% — dramatically cheaper than surrendering your 3% mortgage for a new loan at 6.75%.

This is why lenders who pitch cash-out refinances to borrowers with pandemic-era mortgages are not acting in the borrower's interest. Replacing a 3% first mortgage with a 6.75% loan to access equity you could have borrowed separately at a higher rate on only the incremental amount is mathematically destructive.

When Cash-Out Refinancing Makes Sense

Despite the blended rate argument, there are scenarios where a cash-out refinance is the right call:

When your first mortgage rate is already near current market rates. If you bought or refinanced in 2023 at 7.0% and today's cash-out rate is 6.5%, you're not sacrificing a low-rate asset.

When you want a single fixed payment. HELOC rates are variable and can rise. If predictability matters — particularly for a large renovation — a fixed cash-out refi gives you one known payment.

When the equity amount is very large. Accessing $200,000 via a HELOC may not be feasible based on credit limits. A cash-out refi can accommodate larger extractions within the LTV constraints.

When consolidating multiple debts. If you're using proceeds to pay off credit card balances at 20%+ and personal loans at 12–15%, a cash-out at 6.5% materially reduces your weighted average cost of capital — even if it means losing a 4% first mortgage.

Using Cash-Out to Pay Off Debt: The Numbers

Debt consolidation via cash-out refinance can make sense mathematically when the rate differential is large enough and you commit to not re-accumulating the consumer debt.

Example: $40,000 in credit card debt at 22% average rate. Monthly interest on that debt: $40,000 × (22% ÷ 12) = $733/month.

Consolidating into a mortgage at 6.5%: $40,000 × (6.5% ÷ 12) = $217/month in interest on that portion.

That's $516/month in interest savings on the consolidated amount. The calculation works — but two important caveats:

1. The mortgage interest on debt-consolidation proceeds is not tax-deductible under IRS rules. Only mortgage interest on proceeds used to buy, build, or substantially improve the home qualifies. The IRS applies tracing rules — if you used the cash for credit cards, that portion is treated as personal interest.

2. You've turned short-term, unsecured debt into long-term, home-secured debt. If you later can't make payments, credit card delinquency is a credit problem. Mortgage delinquency is a foreclosure problem.

Cash-Out for Home Improvements

Using cash-out proceeds to fund capital improvements — kitchens, bathrooms, additions, HVAC systems — does produce potentially tax-deductible interest in the US, since the funds are going toward improving the qualifying residence. This is the cleanest use case from both a financial and tax perspective.

Whether a cash-out refi or a HELOC is cheaper for a renovation still depends on your existing rate. Run the blended rate calculation above.

For UK homeowners: remortgaging to fund home improvements is common and generally straightforward. The relevant calculation is whether the additional borrowing at the current remortgage rate beats the alternative financing (personal loan, 0% credit card scheme).

For Australian homeowners: be cautious about mixing investment and personal-use purposes in the same loan. The ATO requires strict interest apportionment if a loan is used partly for investment purposes and partly personal. Keeping the purposes in separate loan accounts avoids that complexity.

LTV Limits on Cash-Out Refinancing

Lenders manage risk by capping how much equity you can extract:

• Conventional loans (US): Maximum LTV of 80% for cash-out. If your home is worth $500,000, the most you can borrow across all loans is $400,000.
• FHA cash-out: Maximum 80% LTV.
• VA cash-out: VA loans allow cash-out up to 100% LTV in some scenarios for eligible veterans.
• HELOC: Most lenders allow combined LTV of 80–90% (your first mortgage plus the HELOC balance).

This means the HELOC option often provides access to slightly more equity than a cash-out refinance under conventional rules — the combined LTV ceiling is higher.

Rate and Term vs Cash-Out: The Key Distinction

A rate-and-term refinance changes your interest rate, your loan term, or both — but does not increase your loan balance. It's the lowest-risk refinance type.

A cash-out refinance increases your balance and therefore your risk exposure. Lenders typically price cash-out loans at a slightly higher rate than rate-and-term refis — often 0.125–0.5% higher for conventional loans — to compensate for the increased LTV and default risk.

If you don't actually need the cash, a rate-and-term refinance is always preferable. If you do need the cash, the blended rate comparison will tell you whether a cash-out refi or a HELOC provides the lower cost of capital.

The Refinancing Decision Worksheet includes a dynamic blended rate calculator that runs this comparison for your specific mortgage balance, existing rate, desired cash amount, and available HELOC terms — so you can see the true cost of each path before committing.