Cash-Out Refinance vs HELOC in 2026: Which Is Cheaper?

The 60-second rule

If your current mortgage rate is lower than the refinance rate, take the HELOC. If it is higher, price both. That is the entire decision in one sentence, and it is the 2026 reality: most homeowners are sitting on rates from 2020–2022 that no refinance can beat. A cash-out refi replaces your rate on the whole balance — not just the cash you pull out — so refinancing away from a cheap rate is paying a premium on money you already borrowed. The calculator prices that premium in dollars. Everything below is the evidence, the branches, and the traps.

How each side really works

The cash-out refinance. Your lender pays off your old mortgage and writes a new, bigger one: new balance = old balance + cash. One monthly payment, usually a fixed rate, closing costs of roughly 2–6% of the new loan, and 30–45 days to close. The number nobody quotes you upfront: the new loan almost always resets the term to 30 years. Twenty-five years left becomes thirty again, and you pay interest on the full amount — including the cash — from day one. Conventional lenders cap cash-out refis at 80% loan-to-value.

The HELOC. Your first mortgage stays exactly as it is — rate, term, payment, all untouched. The HELOC is a second lien: a revolving credit line with a 10-year draw period (interest-only payments are common) followed by a ~20-year repayment period. Rates are usually variable (prime plus a margin), closing costs run $0–$500, funding takes days, and you only pay interest on what you actually draw. The quiet costs: the rate can rise without an annual cap on many lines, the payment jumps when the draw period ends, and the lender can legally freeze the line if home values fall.

The worked example, line by line

$500,000 home, $300,000 owed at 7.0% with 25 years left, $50,000 needed. Refi: 6.5%, 30 years, 2% closing. HELOC: 8.5%, amortized over 20 years.

Cash-out refi: the new loan is $350,000.00. At 6.5% over 30 years the payment is $2,212.24 a month — one fixed bill. Closing costs: 2% × $350,000.00 = $7,000.00 out of pocket at signing. Lifetime interest: $2,212.24 × 360 − $350,000.00 = $446,405.71. New loan-to-value: 70% — under the 80% cap, so the refi is available.

HELOC path: the first mortgage keeps its $2,120.34/mo payment. The $50,000 line at 8.5% over 20 years adds $433.91/mo — $2,554.25/mo combined, $342.01 a month more than the refi. But lifetime interest is only $390,240.07 — $56,165.64 less than the refi — because the old mortgage keeps its 25-year runway instead of resetting to 30.

The verdict: the refi wins the month by $342.01; the HELOC wins the decade by $56,165.64, and it costs $7,000.00 less upfront. Notice what the refi’s monthly win is really made of: term extension, not rate magic. Choose the refi’s 20-year term in the calculator and the payment rises to $2,609.51 while lifetime interest falls to $276,281.43 — the term you pick moves the lifetime bill more than the rate does.

When the refi wins vs when the HELOC wins

HELOC wins: the low-rate holder. If your mortgage is at 4% and the refi rate is 6.5%, refinancing raises your rate on the existing $300,000 — you would pay the higher rate on money you already borrowed cheaply. The calculator’s rate-protection branch shows this in dollars. This is most 2020–2022 borrowers, and it is why the HELOC is the default answer in 2026.

HELOC wins: the flexible project. Renovations that unfold over months, a child’s college bills across semesters, a business with lumpy cash needs — the line lets you draw, repay, and re-draw, paying interest only on what’s out. The refi hands you the full $50,000.00 on day one and charges interest on all of it.

Refi wins: the high-rate holder who wants one fixed bill. If your current rate is already 7%+ and the refi rate is at or below it, the rate penalty disappears and the refi’s lower rate on the whole balance starts working for you — with payment certainty a variable HELOC can’t promise.

Refi wins: the big one-time need. Paying off a large chunk of debt in one shot, or a single known-cost project, where the simplicity of one fixed payment beats managing two — and where you’ll actually use the full amount immediately.

Three rules that decide it before the math

1. The 80% LTV cap. Conventional cash-out refis stop at 80% loan-to-value: (balance + cash) ÷ home value ≤ 80%. Need to push past it and the refi door closes — some HELOCs reach 85–90% combined LTV, and a fixed-rate home equity loan is the third door. Check this before you fall in love with either option.

2. The draw-period cliff. Real HELOCs aren’t amortized from day one the way the calculator simplifies them — they start interest-only for ~10 years, then convert to full principal-plus-interest. Payments commonly jump 20–50% at the switch. The calculator’s HELOC payment is the honest long-run average; the early years are cheaper and the later years more expensive. Plan for the cliff two to three years out.

3. The tax rule. Interest is deductible only when the money is used to buy, build, or substantially improve the home — within the $750,000 combined debt cap. Cash used for debt consolidation, cars, or vacations gets no deduction, on either product. Keep receipts; mixed-use borrowing gets allocated.

Three mistakes to avoid

1. Comparing monthly payments and ignoring the term reset. The classic error: the refi’s lower payment feels like savings, but most of it is 25 years becoming 30 again. Always compare lifetime interest alongside the monthly — the calculator shows both for exactly this reason.
2. Treating the HELOC’s early payment as the real payment. Interest-only years are a teaser for your own budget, not the lender’s gift. Borrowers who size their finances to the draw-period payment get ambushed at year 10. Size to the amortized number.
3. Refinancing away from a rate you’ll never see again. Your 2021 rate is an asset — arguably the most valuable financial asset many households hold. Don’t trade it for the convenience of a single closing without pricing what it’s worth. The rate-protection branch exists for this exact mistake.