Should a Homeowner With an ARM Use Cash-Out Refinance Over a HELOC?

The Quick Read: It depends on three things: how close your ARM is to resetting, how much cash you need, and whether a bank will even write a line on your rental, but when the reset is near and the cash need is large, a cash-out refinance into a fixed structure usually beats stacking a floating line behind a floating loan. A cash-out replaces the adjustable loan. A home equity line (HELOC) sits behind it and leaves the reset in place.

• A cash-out refinance on a standard rental typically tops out near 75% LTV across most of the wholesale network Lendmire places files with, and it qualifies primarily on rental income covering the payment, subject to lender guidelines.
• An investment-property HELOC on this network caps at 70% CLTV and $500,000 total, and it requires a 700 credit profile.
• A HELOC keeps your existing first loan untouched. For an ARM, that is a weaker selling point than it sounds.
• The deciding factor is the reset calendar, not the product brochure.

Key Terms Defined

ARM (adjustable-rate mortgage): A loan whose payment is fixed for an opening period, then moves up or down with the market.

HELOC (home equity line of credit): A revolving line secured by the property, usually sitting in second position behind your first loan.

Cash-out refinance: A new first loan that pays off the old one and hands you the extra equity as cash.

CLTV (combined loan-to-value): Every loan on the property added together, divided by the property’s value.

DSCR (debt service coverage ratio): Monthly rent divided by the full monthly housing payment: principal, interest, taxes, insurance, and any association dues (together, PITIA).

Seasoning: The waiting period between buying or refinancing a property and doing the next cash-out. About 6 months is the common expectation.

What Each Option Does to Your ARM

A cash-out refinance kills the ARM. The new first loan pays it off, and you choose the new structure. A HELOC does the opposite: the ARM stays exactly where it is, with the same index, margin, and caps, and a second loan lands on top.

Most generic comparisons assume your first mortgage is fixed. Their advice goes like this: keep the low first loan and borrow the extra cash separately. That logic protects a fixed payment you like. An ARM’s opening payment is temporary by design. So the “protect my low payment” argument weakens as the reset gets closer.

One distinction matters before anything else. A reset is a reason to refinance. It is not automatically a reason to take cash. If you only want out of the ARM, a rate-and-term refinance does that without pulling equity. Cash-out is for when you want both.

Step One: Read Your ARM Note

Pull the note and find five things: the end date of the fixed period, the index, the margin, the caps, and any payoff clause. The federal consumer-finance regulator explains that the payment after the opening period is the index plus the margin, subject to caps, and that the margin is set in the loan agreement and does not change after closing. After the reset, the payment follows the market, not your finances.

Then run three steps:

1. Add the index and margin to get the fully adjusted figure.

2. Check it against the first-adjustment cap, because that cap limits how far the first move can go.

3. Compare the stressed payment to your rent.

That last comparison is the DSCR question. If rent covers the stressed payment with room to spare, you have options. If it barely clears, you are on a clock. (Waiting for the index to fall is a plan, not a strategy, and caps and floors can blunt any drop.)

Why an ARM Plus a HELOC Stacks Two Floating Loans

A HELOC’s payment moves with the market too. The federal consumer-finance regulator’s HELOC page says payments can change month to month and that repayment-period payments are often significantly higher than draw-period payments. Some lines let you convert part of the balance to a fixed structure. The network’s investment lines do not. Pricing floats through both the draw and repayment periods and never converts to fixed.

Put the two together. Your ARM resets upward in a rising market, and your HELOC rises in the same market. Both hit the same rent. That is correlated risk, and it is the part the generic comparisons miss.

The line itself also has an end-of-term cycle. On the investment structure, you get a 5-year interest-only draw, then a 25-year fully amortizing repayment. Interest-only means the draw period does not pay down principal. When repayment starts, the payment steps up, because principal now amortizes on top of interest.

The network’s lines also require that at least 75% of the line be drawn at closing. So the pitch of “borrow only what you need, when you need it” mostly doesn’t apply. You take most of the line on day one and pay floating interest on it.

Can You Even Get a HELOC on a Rental?

Often not. BiggerPockets threads show many investors hearing that banks decline lines on rentals that still carry a mortgage. Those are anecdotes, not data. But they match what a broker sees: few lenders offer these, and the ones that do ask for more from the borrower.

Here is what the equity lines look like on the network, subject to lender guidelines and full file review:

• Investment property ceiling: 70% CLTV, at a 700 or better credit profile. There is no tier above it.
• Line size: up to $500,000 total on an investment property.
• Debt-to-income: 50% maximum, and the line is qualified on the interest-only payment at the maximum draw. Your personal income and other debts matter here.
• Title: the individual borrower or a revocable living trust. An LLC cannot hold title on these lines. A property deeded to an LLC needs a vesting change or a DSCR cash-out instead, subject to program eligibility.
• Portfolio size: an investor with more than 15 financed properties is not eligible.
• Availability: these lines are offered in only 16 full-service states. Lendmire’s DSCR investor financing runs across 41 markets, including Washington, D.C., so the footprint for the cash-out side is wider.

That title rule alone sidelines a lot of investors. If your rental sits in an LLC, a HELOC may not be on the table.

Some investors borrow against their own home instead. That is a separate transaction. The line then does not sit behind the rental’s ARM at all, and it follows a different set of ceilings.

How a DSCR Cash-Out Gets Sized

DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage. The loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines, so your personal debt-to-income ratio is not the gating item. That is why scaling a portfolio is easier here. For the full mechanics, see the complete DSCR loans guide.

Across most of the network, a cash-out refinance on a standard rental tops out around 75% LTV, with about 6 months of seasoning as the common expectation. A short-term rental cash-out sits lower, near 70% LTV. Most programs want a score around 660. A 620 floor exists in parts of the network, and 700 or better opens the strongest leverage tiers. Standard loan sizes run up to $3,000,000 on standard programs (smaller balances available through select lenders).

On coverage, 1.00 is where many select programs start. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. Stronger ratios open better leverage. Reserves vary by lender, leverage, loan size, and transaction type, commonly around 6 months of PITIA.

Here is the part ARM holders must internalize. The ratio is tested on the new, larger payment. Cash-out raises the balance, which lowers coverage. Your proceeds are limited by the tighter of two tests: the leverage ceiling and the loan amount your rent can support.

Clearing 1.00 also does not mean positive cash flow. DSCR compares rent to PITIA only. Repairs, vacancy, management, utilities, and capital expenses sit outside it.

On structure, the spine is a 30-year fixed. Extended terms and interest-only periods are available through select lenders. ARM structures exist too, for investors who want them.

ARM-Specific Comparison

When Cash-Out Wins, When a HELOC Wins, and When to Do Neither

Cash-out wins when:

• The reset is within a year or already behind you.
• You need a large, one-time sum.
• Your rental is in an LLC.
• You plan to buy more rentals and want to keep personal income out of the underwriting.

A HELOC wins when:

• The ARM’s fixed period has years left.
• The cash need is small.
• You hold the property in your own name or a revocable trust.
• Your credit profile reaches 700.
• A lender offers a line in your state.

Even then, the cost is real. A BiggerPockets discussion makes the case that a low first loan plus a pricier investment HELOC can cost more in blended terms than one cash-out. And a HELOC in second position complicates a later refinance, because a new first-lien lender will generally want first position. The junior lender has no obligation to subordinate. The line you take today can block the exit an ARM holder was counting on.

Do neither when:

• Rent would not cover the new first-lien payment at the tested ratio.
• The property sits in an ineligible category. Manufactured homes, log homes, and barndominiums are not offered through the network’s DSCR programs.
• The cash is for something other than the rental. Tax treatment can depend on how the funds are used and how the property is held; investors should keep clear records and speak with a qualified tax professional before relying on any deduction.

Honestly, this one is close to a toss-up when the reset is two or three years out and the cash need is small. Reset timing decides it, and your note tells you the date.

Next Step

If you are weighing a home equity line against a cash-out refinance and want to see how the numbers work, Lendmire can help you compare options based on the property, the equity available, credit profile, combined leverage, and your goals. The site’s calculator gives an editable, illustrative estimate to start the conversation.

A deeper walk-through of investment-property equity extraction lives in Lendmire’s guide to cash-out refinance on an investment property.

About Lendmire

Lendmire is a mortgage brokerage (NMLS# 2371349) arranging home equity lines of credit — primary-residence, second-home and investment-property lines — through a wholesale lending network in its 16 full-service states. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB – ARM index and margin

2. CFPB – What is a HELOC

3. BiggerPockets – HELOC on an Investment Property

4. BiggerPockets – HELOC on an investment property