Which costs less depends on one question most comparisons skip: what happens to the mortgage you already have? A HELOC adds a second, variable-rate loan and leaves your first mortgage untouched. A cash-out refinance replaces your first mortgage entirely, repricing every dollar you already owe at today's rate. A home equity investment (HEI) isn't a loan at all: no monthly payment, but an investor shares in your home's future value. For a homeowner sitting on a low first-mortgage rate, the HELOC usually wins the cost math. For a homeowner blocked by credit or income documentation, the HEI may be the only one of the three that says yes. Here's the actual math on all three.
What's the real difference between a HELOC, an HEI, and a cash-out refi?
All three convert home equity into money you can use. The mechanics are where they split:
- HELOC (home equity line of credit). A revolving second lien, like a credit card secured by your house. You draw what you need, pay interest only on what's outstanding, and the rate is usually variable. Your existing first mortgage stays exactly as it is.
- Cash-out refinance. A brand-new first mortgage, larger than your current balance; the difference comes to you as cash. One loan, one payment, usually a fixed rate. The catch: your entire balance, not just the new cash, moves to today's rate.
- HEI (home equity investment). An investor gives you a lump sum today in exchange for a share of your home's value when you sell, refinance, or buy the agreement out. No monthly payment and no interest rate, because it isn't a loan. The cost shows up later, as the share you deliver at exit.
The math: one homeowner, three ways to reach $80,000
Say a homeowner has a $600,000 home and a $300,000 first-mortgage balance at 3.50% with 25 years left, and wants $80,000 for a remodel and debt consolidation. All figures below are an illustrative example, not an offer or a rate/APR quote; the pattern is what matters, and you can redo it with your own numbers.
Illustrative example only, not a rate or payment quote.
| Path | Monthly cost of the $80,000 | What happens to the 3.50% first mortgage | Approximate first-year cost |
|---|---|---|---|
| HELOC at an illustrative 8.50% (variable) | $567 interest-only on a full draw | Untouched | ~$6,800 interest |
| Cash-out refi: new $380,000 loan at an illustrative 6.50% | Payment rises from $1,502 to $2,402 (+$900/mo) | Replaced — all $300,000 repriced to 6.50% | ~$24,700 total interest vs. ~$10,500 if you'd kept the old loan: ~$14,200 extra |
| HEI for $80,000 | $0 | Untouched | Upfront fees often ~3.9%–4.99% ($3,120–$3,992); the real cost comes at exit and varies by investor |
The cash-out line deserves a hard look, because it's the option most aggressively marketed. In this example, the homeowner pays roughly $14,200 more interest in the first year than keeping the old loan would have cost. That extra $14,200 is the year-one price of reaching $80,000 this way — while the same $80,000 on the illustrative HELOC costs about $6,800 in its first year. The reason is simple: the refi didn't just borrow $80,000 at 6.50%; it repriced $300,000 of existing debt from 3.50% up to 6.50% to get there. When your existing rate is below today's market, that repricing is the whole ballgame. (This is the same trap as restarting your term when you refinance: the headline number hides what happens to the loan you already had.)
When does a cash-out refinance actually win?
When the repricing helps you instead of hurting you. If your existing rate is at or above today's rates, a cash-out refi consolidates everything into one payment at a rate that isn't a step backward, and fixed-rate certainty on the whole balance can beat a variable-rate second. It can also win when you need a large amount that exceeds HELOC limits, or when your budget genuinely needs one predictable payment instead of a first mortgage plus a floating second. The deciding math is the same break-even and total-interest analysis as any refinance decision: run it against your real numbers, not a slogan.
When is a HELOC the cheapest option?
When you're protecting a low first-mortgage rate and you have the credit and documented income to qualify. The HELOC's structural advantages in this scenario: you keep the 3.50% loan on $300,000, you pay interest only on what you actually draw, and you can reuse the line as you repay it. The structural risks are real too: the rate is variable and can rise, the payment jumps when the interest-only draw period ends, and it's a second lien on your home. I walked through the biggest HELOC misuse pattern in the velocity-banking teardown; used for the right job, though, a HELOC is often the lowest-cost door into your equity. HELOC credit floors among the lenders I work with commonly sit around the low-600s and up, varying by lender.
When does an HEI make sense, and what does it really cost?
An HEI is built for the homeowner the other two turn away: credit challenges (HEI programs I work with go down to a 500 FICO), self-employed or retired borrowers with thin income documentation, or budgets that cannot absorb any new monthly payment. Because it's equity-based, there's typically no income, employment, or DTI requirement, and no monthly payment at all.
The honest cost picture: the investor's share is open-ended until you exit. If that $600,000 home grows at 4% a year for a decade, it's worth roughly $888,000, and the investor's contractual share of that value can total substantially more than the $80,000 you received, in some scenarios more than what the same money would have cost as loan interest. Most agreements cap the investor's maximum return, exact structure and share vary materially by investor, and you can typically exit anytime during a 10-to-30-year term by sale, refinance, or buyout without a prepayment penalty. Federal regulators have also noted these products are not loans and sit outside many standard mortgage protections, so the contract itself is the consumer protection: read it, and have someone run the exit scenarios with you. That's a comparison I do line by line.
So which one should you pick?
Run three numbers, in this order. First, your current first-mortgage rate against today's market: below market, and the cash-out refi starts with a huge handicap; at or above market, it's a real contender. Second, your qualifying profile: strong credit and documentable income opens all three doors; a 500-something score or hard-to-document income may make the HEI the only open one. Third, your monthly budget: if a new payment breaks it, the HEI's $0-per-month structure is doing a job the other two can't, and you're paying for that job with future equity. There's no universally cheapest option, but for your numbers there's usually a clearly cheapest option, and it takes about twenty minutes to find it. Try our mortgage calculators to run your own scenarios.
Quick answers
Is a HELOC cheaper than a cash-out refinance? Usually yes when your existing first-mortgage rate is below today's rates, because the HELOC leaves that rate alone while the refi reprices your whole balance. When your existing rate is at or above market, the comparison flips and the refi often wins.
Does an HEI hurt my credit or require payments? There's no monthly payment, and HEI programs are equity-based rather than income-based, with FICO minimums as low as 500 on programs I work with. The cost is the investor's share of your home's future value at exit, which varies by investor and is typically capped.
Can I get any of these with bad credit? The HEI is the most forgiving (down to 500 FICO on programs in my network). HELOC minimums commonly start around the low 600s, and cash-out refinance minimums vary by program, with government-backed options often the most flexible. Varies by lender; this is exactly what a broker comparison is for.
Do all three put my home at risk? All three are secured by your home. A HELOC and a refi can be foreclosed for nonpayment like any mortgage. An HEI has no payment to miss, but the agreement is recorded against your home and must be settled when you sell, refinance, or reach the end of the term.
Talk to Randy
Math is what I do. Send me your home value, balance, current rate, and how much you need, and I'll run all three paths on your actual numbers, including HEI exit scenarios most people never see modeled. No credit pull, no obligation. Call or text (949) 990-6030, or schedule a call. Full state licensing and NMLS/DRE details are always posted at mathismortgage.com/licensing.
Disclosures: Randy Mathis, NMLS #1516760 | DRE #02236644. Lumin Lending, Inc., NMLS #2716106 | DRE #02291443. Equal Housing Opportunity. Licensed in AL, AZ, CA, CO, ID, MD, MI, OR, PA, TN, TX, UT, WA. This is not a commitment to lend or a rate/APR quote. The figures above are illustrative examples showing how equity-access structures differ in cost on hypothetical numbers; they do not represent an offer of credit, and your rate, APR, payment, and terms will depend on your situation and qualification. Home equity investments are not loans; terms, shares, caps, fees, and availability vary by investor and by state, and are subject to the provider's underwriting. All loans subject to credit approval, income and property qualification, and program terms. Sources: Consumer Financial Protection Bureau, "What is a home equity line of credit (HELOC)?"; CFPB, "What is a cash-out refinance?"; CFPB, "Issue Spotlight: Home Equity Contracts" (2025). Information current as of September 1, 2026.
