Why It Matters
For real estate investors, an equity line unlocks capital sitting inside a property without a sale or full cash-out refinance. You tap equity from a primary residence or a paid-down investment property to fund down payments, renovations, or gap financing on new acquisitions. Once you repay a draw, that capacity refreshes — making it well-suited to investors running back-to-back deals. The key risk: the rate is variable, tied to the prime rate, and a sharp rate move can turn a manageable draw into a painful carrying cost.
At a Glance
- What it is: Revolving credit line secured by real estate equity — draw up to the limit, repay, redraw
- Most common form: HELOC (Home Equity Line of Credit) — variable rate, interest-only during draw period
- Draw period: Typically 10 years — interest-only payments; then 20-year repayment of principal + interest
- LTV cap: Most lenders limit combined LTV (first mortgage + HELOC) to 85%; some go to 90%
- Rate structure: Variable, priced at prime rate + a margin (e.g., prime + 0.50%)
- Investment property restriction: Most conventional lenders won't offer HELOCs on investment properties — portfolio lenders and credit unions are exceptions
- Tax deductibility: Only deductible if the funds are used to buy, build, or substantially improve the property securing the line (post-2017 tax reform)
How It Works
The draw period is where the leverage lives. During the first ten years, you can draw up to your credit limit at any time — paying interest only on the outstanding balance. If your limit is $100,000 and you draw $40,000, you pay interest on $40,000. Pay it down to $15,000 and draw again for a renovation — the limit refreshes as you repay. This revolving structure is what separates a HELOC from a home equity loan, which delivers a fixed lump sum with a set repayment schedule and no option to redraw.
The repayment reset is where most borrowers get surprised. At the end of the draw period — usually year 10 — the line closes to new draws and converts to a fully amortizing repayment phase. The outstanding balance must be repaid with principal and interest over the next 20 years. Monthly payments jump significantly: a $60,000 balance at 8.5% that cost $425/month in interest-only payments becomes roughly $520/month in full amortization. Investors who treat the HELOC as permanent interest-only debt get blindsided at the reset.
Lender appetite for investment properties is limited. The overwhelming majority of HELOC products are designed for primary residences. Fannie Mae and Freddie Mac guidelines don't allow HELOCs on investment properties, which rules out most bank and credit union products. Investors who want an equity line on a rental property must look at portfolio lenders, private lenders, or commercial lines — which typically carry higher rates, lower combined loan-to-value limits, and stricter income documentation requirements than the standard residential HELOC.
Real-World Example
James owns his primary residence outright — worth $520,000. He opens a HELOC at 85% combined LTV, giving him a $442,000 limit. He draws $88,000 to fund a 20% down payment on a $440,000 duplex.
At prime + 0.50% (prime at 8.50%), his rate is 9.00%. Monthly interest: $660. The duplex nets $680 per month after expenses — tight but positive.
Eight months later, James refinances the duplex with a conventional loan, pulling enough cash to retire the HELOC draw. The $88,000 returns to available capacity. The HELOC functions as a revolving acquisition fund: draw, acquire, refinance, reset.
Pros & Cons
- No reapplication required: Once the line is open, you draw when a deal appears — no new underwriting cycle per transaction
- Interest efficiency: You pay interest only on the drawn balance, not the full credit limit
- Revolving access: Repay a draw and the capacity is immediately available for the next acquisition
- Speed of execution: Draws typically fund in 1–3 business days versus 30–45 days for a new mortgage
- Low closing costs: HELOCs on primary residences often close with minimal fees — some lenders waive them entirely for well-qualified borrowers
- Variable rate risk: The rate floats with prime — a Fed tightening cycle raises your carrying cost on every drawn dollar
- Reset payment shock: Interest-only draws become fully amortizing at year 10; the payment jump can strain cash flow on a large balance
- Primary residence at risk: Using your home to fund investment activity means a deal gone wrong could threaten your personal residence
- Investment property restrictions: Most banks won't offer HELOCs on rentals — portfolio lender alternatives carry higher rates and tighter LTV limits
- Reduced borrowing capacity: An open HELOC counts as a liability on your credit profile and can limit qualification for subsequent investment mortgages
Watch Out
- The tax deduction doesn't apply to investment purchases. Post-2017 reform limits the HELOC interest deduction to funds used to buy, build, or substantially improve the property securing the line. Using a primary residence HELOC to fund a rental down payment is not deductible — confirm with your CPA before counting on it.
- Lenders can freeze or reduce your line. HELOCs are not closed-end loans — lenders can cut your limit or suspend draws if your home value drops or credit profile weakens. During 2008–2009, millions had limits slashed mid-draw. Never treat the full limit as guaranteed capacity.
- Variable rate stacks badly across multiple deals. A HELOC-funded down payment on a rental with a variable investment mortgage gives you two floating rates simultaneously. Run cash-flow projections at 2–3 percentage points above current levels.
- The draw period end date is a hard deadline. Know when your draw period expires. Carrying a large balance at reset with no refinance option means a forced payment increase with zero flexibility.
The Takeaway
An equity line is a practical, low-friction way to recycle equity from a primary residence into new acquisitions. It works best as a bridge — draw to acquire, refinance to retire, repeat — rather than permanent financing. Treat it as a tool with a known expiration date, watch rate moves, and never underestimate the payment jump at the draw period reset.