Should I Pay Off My Rental Property or Keep the Mortgage

Should I pay off my rental property or keep the mortgage is an after-tax allocation question. The payoff buys a guaranteed return equal to the interest (and the risk) you remove. Keeping the loan keeps leverage on an asset that may still out-earn that after-tax cost if you deploy the cash into another income property—or into reserves that keep you from becoming a forced seller. Neither answer is moral. One of them is usually sloppy math.

Interest on rental debt is generally a rental expense, not “bad consumer interest.” IRS Publication 527 is the official rental-activity primer. Your CPA applies the facts. This article is the investment-finance frame.

Should I Pay Off My Rental Property or Keep the Mortgage: The Comparison

Compute two IRRs on the same cash you would use to kill the loan.

Use A — Payoff.
You spend $C to retire the note. You save the after-tax interest and you remove default risk and renewal risk on that loan. Approximate first-year benefit:

After-tax interest saved ≈ remaining interest portion × (1 − your marginal rate at which that interest was deductible this year)

If the interest was not deductible this year (passive loss limitation, basis limitation), the after-tax savings are closer to the pre-tax interest—you were not getting the shield. That makes payoff more attractive, not less.

You also free the mental load and any prepay that would have hit a later refinance. You give up inflation’s habit of shrinking real principal. You give up the option to use $C as a down payment.

Use B — Keep the mortgage and deploy $C.
$C becomes down payment and closing costs on another rental, or a reserve bar you actually need, or a paydown of higher-cost debt (credit cards, a hard-money tail). The return is the cash-on-cash and risk of that use, not a slogan about “good debt.”

If Use B is “leave $C in a 4% cash account forever,” payoff of a 7% rental note usually wins. If Use B is a conservative LTR with a mid-teens cash-on-cash on new cash after a real DSCR payment, keeping the cheap loan can win. What is a good cash-on-cash return is the benchmark language for Use B.

Cheap Leverage Versus Expensive Comfort

Keep the mortgage when most of these are true:

• The rate is below what you can credibly earn, after tax and vacancy, on the next dollar of rental equity.
• The note is fixed, long, and has a tolerable prepay if you later sell or 1031.
• DSCR / cash flow on the current house remains comfortable. You are not one vacancy from a personal subsidy.
• You have a specific next acquisition or a reserve target that is not “someday.”
• You can sleep. Unquantified anxiety is a real cost; just do not call it a 20% return.

Pay off (or pay down to a cash-flow cushion) when:

• The rate is variable and you do not have a use for the cash that beats a reset.
• The loan is a balloon or a hard-money leftover. Killing a 10% tail is not the same decision as killing a 4% thirty-year.
• Passive-loss limits already deny the interest deduction, and you have no REPS path. See real estate professional status.
• You will not buy another property and the cash is doing nothing.
• Insurance, taxes, or capex will force a contribution anyway; removing PITIA is how the house stays an investment.

A partial paydown is allowed. You do not have to be binary. Taking a 1.05 DSCR to 1.25 by burning $20,000 can be smarter than a full payoff that strands $160,000 of idle equity. How to increase DSCR is that lever in reverse.

Do Not Ignore Friction on the Payoff

• Prepayment. A DSCR or commercial note may charge a percentage, yield maintenance, or defeasance. A $8,000 prepay on a $12,000 remaining-interest year changes the payoff IRR.
• Liquidity. Paying off the only house you could cash-out later can leave you unbanked for the next deal. Cash-out strategy is the opposite move; you cannot do both with the same dollar.
• Opportunity in a 1031 year. Paying off just before an exchange can change boot and leverage replacement rules. Ask the QI and CPA before you wire a payoff in an exchange year.
• Entity and title. If you plan to move the property into an LLC, a payoff-then-deed can be cleaner than a deed-with-loan. Price that sequence.

A Compact Worked Comparison (Educational)

Loan balance $150,000 at 6.25% with ~$9,200 of interest next year if you keep amortizing. You are in a 32% federal bracket and the interest is currently usable. After-tax interest cost ≈ $6,300, plus any state. That is about a 4.2% after-tax cost of keeping the $150,000 out of the house.

If the same $150,000 as a 25% down payment buys a $600,000 LTR that clears $9,000 a year after a conservative PITIA and 8% vacancy, cash-on-cash is 6% pre-tax—better than 4.2% if you trust the operations, worse if that $9,000 is a spreadsheet wish. If the next door only works as an aggressive STR, you do not have a keep-the-mortgage story. You have a risk story.

No one can promise those rents or that bracket. The method is the point.

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Frequently Asked Questions

Is a paid-off rental always the safer investment?

It removes lender default risk on that address. It concentrates more of your net worth in one house and can leave you short of down-payment cash. Safety is a portfolio property, not a single unpaid coupon.

Does paying off a rental increase my DSCR on a new loan?

A paid-off house has no subject PITIA, so it does not consume DSCR on that address. For a new purchase, reviewers still look at reserves and, on some programs, global exposure. Idle equity in a paid-off house does not automatically count as liquid reserves unless it is actually accessible (for example, via a later cash-out that has not happened yet).

Should I pay off a high-rate DSCR loan before I buy again?

Often you should at least pay down or refinance expensive debt before you add a third payment, unless the new door’s return clearly beats that cost. Compare refinance, partial payoff, and waiting. Do not collect 8% notes for sport.

What if I am close to retirement and tired of leverage?

That is a valid reason to pay down even if a spreadsheet says “keep the 5% loan.” Reduce the portfolio to the number of doors you will actually operate. Math does not get a veto over a plan you will not execute.

Can I use a HELOC to keep a first mortgage and still access cash?

Sometimes. A HELOC still underwrites you and adds a second payment. See DSCR vs HELOC. Do not open a line you will draw to “invest” in a deal that does not cover both payments.