Using a HELOC to Buy a Rental Property: Numbers and Risks

How a HELOC Funds a Rental Purchase

A home equity line of credit lets you borrow against the equity in a property you already own, usually your primary residence. Investors use it to fund the down payment and closing costs on a rental, then repay the line from cash flow, a refinance, or a future sale.

A HELOC is revolving credit with a variable rate and a draw period, so you pay interest only on what you draw. That flexibility is useful, but the variable rate means your borrowing cost can rise even when the rental payment stays fixed.

How Much You Can Borrow

Lenders cap total borrowing at a combined loan-to-value ratio, often around 80 to 90 percent. On a 500,000 dollar home with a 300,000 dollar mortgage and an 85% cap, available equity is (500,000 x 0.85) - 300,000 = 125,000 dollars.

That amount could cover the down payment and closing costs on a rental, but borrowing the maximum leaves no cushion. Draw only what the deal requires plus a small reserve.

Model the True Cost of Two Loans

When you buy a rental with HELOC funds plus a mortgage, the property now carries two debts: the rental mortgage and the HELOC draw. Both payments must be covered by rent for the deal to be sustainable.

Add the HELOC interest to the rental cash flow analysis. If the property only produces positive cash flow when you ignore the HELOC payment, the deal is really running at a loss and depends on appreciation to bail it out.

Weigh the Real Risks

• Variable rates can rise, increasing your payment while rent stays fixed.
• The HELOC is secured by your home, so a default puts your residence at risk, not just the rental.
• Interest-only draw periods end, and payments jump when principal repayment begins.
• Two layers of leverage amplify losses as well as gains if values fall.
• Lenders can reduce or freeze a line during market stress, cutting off access.

When It Makes Sense

A HELOC can work well as short-term, recoverable capital: fund a BRRRR project, then repay the line from the cash-out refinance once the property is stabilized. It is riskier as permanent financing you never intend to repay quickly.

Have an exit plan before you draw. Know exactly how and when the line gets paid back, and confirm the rental still cash flows if the HELOC rate rises by two or three percentage points.

Frequently Asked Questions