How to Use a HELOC or Cash-Out Refinance to Fund Your First Short-Term Rental

The average U.S. homeowner is sitting on roughly $302,000 in home equity, according to Cotality’s 2026 data. That number rarely comes up in conversations about getting into short-term rental investing. People think DSCR loan. They think 20% down payment accumulated over years of saving. They look at the equity in their primary residence as the scoreboard of their financial life, not as the capital sitting idle that could put them into a beach house or mountain cabin they own and rent.

This article is for that homeowner. A HELOC or cash-out refinance on a primary residence is one of the quieter STR entry strategies in 2026, precisely because most people associate these products with kitchen renovations, not investment acquisitions. The mechanics are genuinely different from a DSCR loan. The tax treatment is different in a way that surprises most investors when they actually read the rules. And the risk profile requires a clear-eyed look before any money moves.

Here is how both products actually work, what lenders look at when you tell them the proceeds are going toward investment property, what the IRS has determined about the interest deductibility, and where the real risk in this strategy lives. Read this before you finalize your financing path.

HELOC vs. Cash-Out Refinance: The Actual Mechanics

These two products are often mentioned in the same breath because they both allow homeowners to access equity. In practice, they are structured very differently.

How a HELOC Works

A home equity line of credit gives you a revolving credit line tied to the equity in your primary home. The lender approves you for a maximum draw amount, and you can borrow against that ceiling as needed during a draw period that typically runs ten years. During the draw period, you pay interest only on the outstanding balance. After the draw period ends, the balance converts to a principal-and-interest repayment schedule over a remaining term, typically twenty years.

The rate is variable, indexed to the prime rate. As of June 2026, the national average HELOC rate is 7.47% according to Bankrate’s survey of major lenders, down from above 9% at the 2024 peak. The rate can move in either direction depending on Federal Reserve policy. If rates rise, your monthly interest payment rises with them. This is the fundamental difference between a HELOC and a fixed mortgage: the cost is not locked.

Most lenders cap HELOC borrowing at 80-85% combined loan-to-value (CLTV is the ratio measuring all debt secured by the property as a percentage of its appraised value). If your home appraises at $700,000 and your first mortgage balance is $300,000, your maximum CLTV at 80% allows $560,000 in total debt against the property. Subtract your existing $300,000 mortgage and you can access up to $260,000 via HELOC. The exact ceiling varies by lender, credit score, and debt-to-income ratio, but 80% CLTV covers the mainstream standard for well-qualified borrowers.

How a Cash-Out Refinance Works

A cash-out refinance replaces your existing first mortgage with a new, larger loan. You borrow more than you currently owe, and the difference between the old balance and the new loan amount is paid to you in cash at closing. The new loan is a conventional fixed-rate mortgage with standard amortization and the full closing cost load you would expect: typically 2-6% of the loan amount, or $7,000-$21,000 on a $350,000 refinance.

For a primary residence under conventional (Fannie Mae) guidelines, the maximum LTV on a cash-out refinance is 80%. If your home is worth $700,000, you can refinance up to $560,000. If your current mortgage is $300,000, you can pull out up to $260,000 in cash proceeds.

The critical factor for anyone who locked in a sub-5% rate during 2020-2022: a cash-out refinance replaces your entire first mortgage at today’s rates. The national average 30-year fixed refinance rate was approximately 6.71-7.24% APR as of late June 2026. Trading a 3.25% rate for 7% on your entire existing balance is expensive, and that cost compounds for thirty years. This is why the HELOC is often the more financially rational access path for homeowners still holding those low first mortgage rates. A HELOC sits on top of your existing first mortgage as a second lien. The first mortgage stays exactly as it is.

Which Path Fits Your Situation

The HELOC generally wins when you want to preserve a low existing first mortgage rate, value flexibility in how much you draw, and can tolerate a variable rate for the period you hold the credit line. The cash-out refinance generally wins when you want one fixed payment, a single lien structure, and certainty in your monthly obligation regardless of rate movements. For investors planning to repay the HELOC from the STR’s cash flow over a defined timeline, the draw-period flexibility often provides a meaningful operational advantage.

Underwriting Reality: What Lenders Look At When You Mention Investment Property

Here is where the conversation often surprises first-time investors.

For a primary-home HELOC, the lender underwrites against the primary home’s value and your personal financial qualifications: income, credit score, and existing debt-to-income ratio (DTI). Most lenders want DTI below 43% including the projected HELOC payment calculated at the current rate. A FICO score of 700 or above is the practical minimum for competitive pricing; 740 or above gets meaningfully better terms.

What the lender generally does NOT evaluate: the investment property you plan to buy. The STR’s projected rental income does not factor into a residential HELOC underwriting decision. You qualify based on your personal finances. This is the core difference from a DSCR loan, where the property’s projected income is the primary qualification metric. For investors whose personal income would not easily support conventional investment property financing, the HELOC path can actually be easier to obtain, because it is evaluated like any other residential home equity product.

That said, some lenders have internal policies restricting HELOC proceeds from being used to purchase investment property. This is more common at large banks than at credit unions or community lenders. The loan use disclosure required at origination matters here. If your intended use is investment property acquisition, confirm with your lender upfront that their program permits it. Do not indicate home improvement on the application if the funds are going to an investment property. Beyond being dishonest, the misrepresentation is a form of loan fraud with consequences that are considerably worse than a declined application (this is not a gray area, legally speaking).

For the cash-out refinance, the underwriting is similarly focused on the primary home as a conventional mortgage refinance. The intended use of proceeds is disclosed but does not disqualify the loan under standard residential Fannie Mae guidelines.

The complete guide to buying an Airbnb property in 2026 walks through the full sequence from market selection to closing. Before you finalize your financing path, that hub article will give you the context to make the financing decision in the right order relative to the rest of the acquisition process.

The Tax Picture: HELOC Interest and the Rule That Surprises Most Investors

This section is where most financing guides go quiet, and where most investors make costly assumptions.

Under IRS Publication 936, home mortgage interest is deductible as an itemized deduction on Schedule A when the loan is secured by your home AND the proceeds were used to buy, build, or substantially improve that same home. The Tax Cuts and Jobs Act of 2017 (TCJA) tightened these rules, and those provisions were made permanent when the One Big Beautiful Bill Act was signed on July 4, 2025. The $750,000 total acquisition debt limit and the use-of-proceeds requirement are now permanent features of the tax code.

Here is the rule that matters for STR buyers: if you borrow via a HELOC secured by your primary residence and use the proceeds to purchase an investment property, the interest on that HELOC is NOT deductible as home mortgage interest under Schedule A. The HELOC proceeds were not used to improve the home securing the loan.

Here is what most articles leave out: that restriction is usually not the problem it sounds like.

The IRS applies tracing rules (Treasury Regulation 1.163-8T) to determine how borrowed money is characterized for tax purposes. The principle is that interest follows the use of the funds, not where the loan is secured. When HELOC proceeds are used to acquire an income-producing rental property, the interest on those proceeds is reclassified as investment or rental interest, deductible on Schedule E as a rental expense against the income generated by the STR.

For most STR investors, this is actually the better outcome. The Schedule A home mortgage interest deduction only helps you if you itemize your deductions. After the TCJA raised the standard deduction significantly, the majority of U.S. households no longer itemize. A Schedule E deduction, by contrast, reduces your net rental income directly before it reaches your personal return, regardless of whether you itemize. It is a business expense of the investment, not a personal deduction contingent on your filing strategy.

The documentation requirement is real. To support the Schedule E deduction, you need to trace the HELOC disbursement to the STR acquisition. Keep the HELOC draw statement, the wire transfer records, and the STR closing disclosure in one file. If the same HELOC serves multiple purposes (part funding the STR, part for primary home work), the interest must be allocated proportionally between Schedule A and Schedule E under the tracing rules. The cleanest approach: draw a dedicated amount exclusively for the STR and trace it directly to the closing.

The same tracing logic applies to a cash-out refinance. Interest attributable to the cash-out portion used to acquire the STR is deductible on Schedule E. Interest on the portion that simply refinanced your prior mortgage balance follows the original use of those funds (your primary home) and remains deductible as home mortgage interest on Schedule A within the $750,000 limit.

This article provides general information and should not be construed as legal or tax advice. Consult a qualified CPA with real estate investment experience before executing this strategy.

Running the Numbers: A Worked Example

Picture this: you bought your primary home several years ago and have been paying down the mortgage steadily while the property appreciated. Today it appraises at $700,000 with a $300,000 mortgage balance outstanding. Your equity is $400,000.

At 80% CLTV, your maximum HELOC borrowing capacity is $700,000 x 0.80 minus $300,000, which equals $260,000 available. You decide to draw $150,000 as a down payment on a $400,000 short-term rental property in a solid coastal or mountain market.

At the current average HELOC rate of 7.47%, your interest-only monthly payment on that draw is:

$150,000 x 7.47% / 12 = $933.75 per month.

For the remaining $250,000 of the STR purchase, you obtain a DSCR loan at 7.5% fixed on a 30-year term. With 37.5% down, you qualify for competitive DSCR pricing. The monthly principal-and-interest payment on $250,000 at 7.5% is approximately $1,748.

Total monthly debt service: $934 (HELOC) + $1,748 (DSCR) = $2,682 per month, or $32,181 per year.

Estimated STR operating costs outside of debt service: property taxes at approximately $350 per month, STR-rated insurance at $150 per month, and maintenance, supplies, and cleaning coordination at $250 per month. Total: $750 per month, or $9,000 per year.

With professional property management at 20% of gross revenue, the break-even calculation is:

($32,181 debt service + $9,000 operating costs) / 0.80 = $51,477 in annual gross STR revenue required to cover all costs.

Run the revenue projections for your target market using the StaySTRA Analyzer before committing to any financing structure. A $400,000 STR in a well-chosen coastal or mountain market can generate $60,000-$75,000 annually in gross revenue in current market conditions, which clears the break-even and produces meaningful cash flow. A property in a lower-demand or oversaturated market generating $38,000-$42,000 gross produces a monthly deficit. That deficit is funded from your personal cash flow. Which is why running the numbers on the specific property, in the specific market, at the specific price point matters before the financing conversation happens.

The Risk Column

A HELOC placed on your primary residence creates a lien on the home where you live. If you miss HELOC payments, the lender has a security interest in that property. A short-term rental that generates no revenue does not directly threaten your primary home. Missed HELOC payments connected to that revenue shortfall can. These are connected by cash flow.

In the worked example, the HELOC payment is $934 per month on the $150,000 draw. If the STR sits largely vacant during an off-peak period, that $934 comes from somewhere else in your budget. A three-month stretch of weak occupancy generating $4,000 gross where you projected $12,000 creates a gap in debt service coverage. Manageable once. As a persistent pattern, it creates a personal financial problem with your primary home as the backstop.

The cash-out refinance scenario carries a related but distinct risk. The cash-out proceeds are folded into your primary mortgage, so there is no separate payment that can default independently. The entire obligation is one loan, one payment, one lien. The total monthly obligation is higher than your pre-refinance mortgage, and that payment is fixed regardless of STR performance.

Interest rate risk differs between the two products. A HELOC’s variable rate can increase if the Federal Reserve raises rates. In the worked example, a rate increase of 1% adds $125 per month to the HELOC payment on $150,000 drawn. The cash-out refinance eliminates that specific variable but locks in today’s rate for thirty years on the full refinanced balance.

One consideration worth its own sentence: the STR investment property should be held in an LLC or similar entity structure to separate its liability from your personal balance sheet. A guest injury claim at the STR should not reach your primary home. But the HELOC obligation itself is personal debt secured by your primary home. The LLC protecting you from the investment property’s liability does not affect your personal obligation to repay the HELOC. Entity structuring and debt structuring are separate decisions that interact, and they both deserve attention before you close on an STR.

The full comparison of DSCR loans, conventional mortgages, and associated lender requirements is covered in depth at how to finance your first short-term rental, the companion piece covering those other financing paths in detail.

When This Path Makes Sense vs. When DSCR Is the Better Call

The HELOC or cash-out refi path makes more sense when:

• Your personal income supports residential HELOC underwriting comfortably without straining your DTI.
• You have substantial home equity and can access a meaningful down payment without depleting your CLTV headroom or stressing your primary home’s financial position.
• You want to avoid DSCR qualification hurdles, particularly the market rent appraisal or documented rental history requirements that first-time investors cannot satisfy.
• Your existing first mortgage rate is significantly below current market rates, making a full cash-out refinance economically costly.
• You are buying in a competitive market where an all-cash offer (funded by a HELOC draw) provides an acquisition advantage over financed buyers.

The DSCR loan makes more sense when:

• You want to keep your primary home equity completely separate from the investment property’s performance risk.
• The STR’s projected revenue supports DSCR qualification at your target purchase price and loan amount.
• You prefer a fixed, separate payment on the investment property that does not layer additional obligation onto your primary home’s lien structure.
• You do not have sufficient primary home equity, or your first mortgage situation makes a HELOC impractical.

Many investors will end up using both: HELOC for the down payment, DSCR loan for the permanent investment property financing. The worked example in this article reflects exactly that structure. Once the financing is settled, the contract review matters. The guide to what to look for in a short-term rental purchase contract covers the specific provisions that matter for vacation rental buyers that standard residential purchase contracts do not address at all.

We do our best to keep our financing and tax guides accurate and up to date, but lender guidelines, IRS rules, and market conditions change and we are only human. Always verify current requirements directly with your lender and a licensed CPA before executing any financing strategy.

Before drawing from your HELOC or committing to a cash-out refinance, run the revenue projections for your target market. The StaySTRA Analyzer generates gross revenue estimates, occupancy rates, and ADR data by market and property type, giving you the numbers to complete the break-even math in this article with real inputs rather than assumptions. A deal that works on optimistic projections often does not work on realistic ones.