Using a HELOC to Fund Your Cabo Property Purchase: The Cross-Border Financing Playbook

Here is the dirty secret of Cabo real estate financing: most Americans buying property in Los Cabos pay cash. Not because they are all sitting on seven figures of liquid capital, but because using a HELOC to buy Mexico property is a strategy most buyers never consider — and most agents never mention. Mexican mortgages for foreigners run 10–12% with 50% down requirements and a mountain of paperwork. Meanwhile, your US home is sitting there with equity you can tap at 8–9%, close in weeks, and potentially deduct the interest. I have coached dozens of buyers through this exact play. Here is how it works.

Why Most Cabo Buyers Pay Cash (and Why That Is Changing)

Roughly 85% of foreign buyers in Los Cabos close with cash. That is not because they are all ultra-wealthy — it is because the alternatives have historically been terrible. Mexican banks will lend to foreigners, but the terms are punishing: interest rates of 10–12%, loan-to-value ratios of 50–70% (meaning 30–50% down), origination fees of 2–4%, and a closing process that takes 60–90 days longer than a cash deal.

Cross-border mortgage specialists like MexLend and Intercostal Financial have improved the options, but even their best products run 8.5–10% with 25–35% down. For a $500,000 condo in Cabo del Sol, that is $125,000–$175,000 out of pocket before you borrow a dollar.

The HELOC strategy flips the equation. Instead of borrowing against the Mexican property (which Mexican banks treat as high risk because the borrower is foreign and the collateral is in their jurisdiction), you borrow against your US home (which US banks treat as low risk because it is domestic collateral they understand). The Mexican seller gets a cash offer — fast close, no financing contingency — and you get US-market lending terms.

How a HELOC Works for a Cabo Purchase: Step by Step

Step 1: Determine Your Available Equity

Most US lenders will let you borrow up to 80–85% of your home's current appraised value, minus your existing mortgage balance. That is your maximum HELOC amount.

Example: Your US home is worth $800,000. You owe $400,000 on your primary mortgage. At 80% LTV, you can borrow up to $640,000 total — meaning $240,000 is available as a HELOC. At 85% LTV (some lenders in 2026), that number jumps to $280,000.

For a $350,000 condo in El Tezal, $240,000 in HELOC proceeds plus $110,000 in savings gets you there — with a cash offer that closes in 30 days instead of 90.

Step 2: Shop HELOC Rates

As of mid-2026, HELOC rates from major US lenders range from 7.5% to 9.5%, depending on your credit score, LTV ratio, and the lender. The best rates go to borrowers with 740+ FICO scores and LTV below 70%. According to Bankrate, the national average HELOC rate is approximately 8.6%.

Compare that to your Mexican mortgage alternatives:

Financing Option	Rate	Down Payment	Closing Time	Collateral
US HELOC	7.5–9.5%	None (uses US equity)	2–4 weeks	Your US home
Mexican bank mortgage	10–12%	30–50%	60–90 days	Mexican property
Cross-border specialist	8.5–10%	25–35%	45–75 days	Mexican property
All cash	0%	100%	2–4 weeks	N/A
Developer financing	0% (during construction)	30–50% spread over 18–36 mo	Per payment schedule	N/A (pre-construction)

Step 3: Structure the Draw and Wire

Once approved, you draw on the HELOC and wire funds to the Mexican escrow account or directly to the notario's trust account. The wire goes through as a standard international transfer — your bank sends USD, the notario receives it (or converts to pesos at closing). The Mexican seller sees a cash offer. The notario does not care where your cash came from, only that it arrives.

Key detail: wire the funds in USD. Do not convert to pesos before sending. The notario will handle the conversion at the day-of-closing exchange rate, and you want the flexibility to negotiate whether the transaction closes in dollars or pesos.

The Tax Angle: When HELOC Interest Is Deductible

This is where it gets nuanced, and where a lot of bad internet advice lives. After the 2017 Tax Cuts and Jobs Act (TCJA), HELOC interest deductibility changed significantly.

The rule: Under IRC §163(h), interest on home equity debt is deductible only if the proceeds are used to "buy, build, or substantially improve" a qualified residence. Your Cabo property can qualify as a second home if you use it personally for more than 14 days per year (or 10% of the days it is rented, whichever is greater).

If your Cabo property is a second home: HELOC interest used to purchase it is deductible, subject to the $750,000 combined limit on acquisition indebtedness (your primary mortgage plus this HELOC). If your primary mortgage is $400,000 and your HELOC is $250,000, your combined $650,000 is under the limit — full deduction.

If your Cabo property is pure investment (rental): The interest is not deductible as mortgage interest, but it may be deductible as an investment expense on Schedule E against your rental income. Different form, different rules, but still potentially valuable.

If you use the HELOC for a mix: Only the portion used for property acquisition qualifies. Keep meticulous records of how the funds were deployed. Your CPA will thank you.

The Risks: When a HELOC for Cabo Property Is a Bad Idea

Variable Rate Exposure

Most HELOCs are variable-rate products tied to the US prime rate. If the Fed raises rates, your monthly payment rises too. In 2022–2023, HELOC rates jumped from 4% to 8%+ in 18 months. If you are stretched thin, that kind of swing can turn a smart financing play into a monthly cash crunch.

Mitigation: some lenders offer fixed-rate HELOC options or rate-lock features. They cost 0.25–0.50% more but eliminate the variable-rate risk. For a Cabo purchase that you plan to carry for 5+ years, that premium is worth it.

Your US Home Is the Collateral

This is the big one. A HELOC is secured by your American home. If your Cabo investment goes sideways — the development stalls, the peso tanks, you cannot rent it, or you hit unexpected renovation costs — your US home is on the line. With a Mexican mortgage, the worst case is the Mexican bank takes the Mexican property. With a HELOC, the worst case is you lose your primary residence.

My rule: never HELOC more than you could absorb as a total loss without it threatening your primary housing. If losing $250,000 would mean selling your home, the HELOC is too large.

Draw Period Expiration

HELOCs typically have a 10-year draw period followed by a 20-year repayment period. During the draw period, you may be making interest-only payments. When the repayment period hits, your monthly payment can double or triple because you are now paying principal. Plan for this. If your Cabo property is generating rental income, that income needs to cover the repayment-period payment, not just the draw-period payment.

When the HELOC Strategy Makes Sense

After coaching hundreds of cross-border transactions, here is my framework for when a HELOC is the right tool:

• You have 40%+ equity in your US home — enough cushion that a 15–20% US market correction would not put you underwater on the combined debt
• Your combined LTV stays under 75% — primary mortgage plus HELOC divided by home value. This keeps you in the best rate tier and gives you margin
• You can service the payment from income, not from the Cabo rental — treat any rental income as gravy, not as a required payment source
• The Cabo purchase is $150K–$400K — large enough that the rate savings over a Mexican mortgage matter, small enough that it is not your entire net worth on one bet
• You plan to hold the Cabo property 5+ years — short-term holds amplify the variable rate risk and minimize the appreciation that justifies the leverage

When NOT to Use a HELOC for Cabo

The HELOC is wrong when:

• Your US home equity is less than 30% — you are overleveraging your primary residence for a speculative foreign purchase
• You are buying pre-construction with a 2-year delivery horizon — you will be paying HELOC interest for 24 months on a property you cannot rent or use. Developer delays could stretch that to 36+ months
• You are counting on rental income to service the HELOC — vacancy happens, management fees eat margins, and seasonal variability means some months generate zero income
• You are within 5 years of retirement — adding debt against your primary residence as you approach fixed income is a risk amplifier, not a wealth builder
• The combined debt service (primary mortgage + HELOC) exceeds 35% of gross income — standard lending guideline for a reason

The 7-Step Playbook

1. Get pre-qualified for a HELOC before you fly to Cabo for your property search. Know your max draw amount, rate, and terms
2. Identify your target Cabo property and negotiate a cash price — the seller does not need to know you are financing on the US side. You are a cash buyer from their perspective
3. Wire a deposit (typically 5–10%) from savings to the escrow agent to secure the property. Draw on the HELOC only when you are ready to close
4. Draw the HELOC balance 5–7 business days before the Mexican closing date — international wires can take 2–4 business days to settle in the notario's account
5. Close in Mexico — the notario handles the escritura, fideicomiso setup, and property registration. Your HELOC funds arrive as a cash wire
6. Set up rental income (if applicable) to flow into the account that services the HELOC — automate the payment loop so rental income offsets the monthly draw
7. Review annually: reassess HELOC rate vs. available refinance options. If US rates drop, refinance into a fixed-rate home equity loan. If the Cabo property appreciates substantially, consider paying down the HELOC from the gained equity position