Your duplex has appreciated $100,000 since 2021, the tenant has renewed twice, and your mortgage rate sits a full point above today’s market. Refinancing looks like a no-brainer. Then you find out the lender wants 25% equity rather than 20%, the quote comes in half a point above what your sister got on her primary residence, and an underwriter asks for your debt service coverage ratio. Nine years of landlording and nobody has ever asked you that.
A non-owner-occupied (rental) property refinance runs on a different rulebook. Knowing the rules before you apply is the difference between a clean 30-day close and a file that dies in underwriting three weeks after you paid for an appraisal.
Why rental loans cost more and go less
Lenders price investment property higher for a simple reason: if a borrower runs into trouble, the mortgage on the house they sleep in gets paid first. That risk shows up in three places.
- Rate. Expect 0.5% to 1% above comparable owner-occupied pricing. A 6.5% loan on a primary residence might quote 7.25% on the same duplex.
- Loan-to-value. Conventional refinances typically cap at 85% LTV for a single-family rental and 75% for a two-to-four-unit building. Cash-out is tighter again.
- Reserves. Six months of principal, interest, taxes and insurance in the bank after closing is standard, and multi-unit properties can push that higher.
Credit cutoffs shift too. A 620 score might scrape through on an owner-occupied loan, but most investment programs want 680, and pricing tiers fall more sharply above 740.
Rate-and-term versus cash-out: two different plays
These get lumped together in conversation, then treated completely differently by underwriters.
Rate-and-term refinance
You replace the existing loan with a new one, sometimes shortening or lengthening the term, and take no meaningful cash at closing beyond expense reimbursement. Simplest path, lowest fees, best shot at the sharpest pricing. If a lower payment is the goal, start here.
Cash-out refinance
Here you borrow against equity. On an investment property most conventional lenders cap cash-out at 75% LTV, and in many cases 70% on multi-unit files. The property usually needs to have been owned for at least six months, though the delayed financing exception lets you pull out purchase costs inside that window. That matters if you bought in cash and want your capital moving again.
Landlords use cash-out proceeds for a down payment on the next property, a kitchen and bath renovation that justifies $300 more per month in rent, or retiring an 11% hard money loan. What you do with the money affects both your rate and your taxes, so decide the purpose before you decide the loan.
The numbers an underwriter actually runs
Rental income. Conventional guidelines generally let you count 75% of gross rent from the subject property, documented by an appraiser’s rent schedule. The 25% haircut is a built-in vacancy and maintenance allowance. On a vacant unit, you can often use market rent instead of a signed lease.
Debt service coverage ratio. DSCR lenders divide net operating income by the mortgage payment. A 1.25x ratio means the property brings in 25% more than the loan costs. Conventional loans don’t require a specific DSCR, but non-QM and portfolio lenders frequently insist on 1.0 to 1.25.
Reserves. Verified and seasoned, in an account you can access. Some lenders count retirement accounts and even gift funds, plenty of others don’t.
When a rental refinance genuinely pays off
Run the numbers rather than the vibe. A $240,000 loan at 7.75% costs about $1,719 a month in principal and interest. At 6.5%, that falls to roughly $1,517. You save $202 a month, or $2,424 a year. If closing costs land at $3,500, you break even in about 17 months and pocket the rest for as long as you hold the loan.
Other situations where the math holds up:
- Replacing a bridge or hard money loan at 11% with permanent financing
- Pulling equity to buy the next property without draining personal savings
- Removing a co-borrower after a divorce or partnership split
- Resetting a balloon payment that comes due 18 months from now
When it doesn’t
A drop of 0.25% rarely justifies the fees. If you plan to sell within two years, closing costs eat the benefit and then some. Prepayment penalties deserve a hard look on portfolio and commercial loans, where yield maintenance can cost more than the interest you saved over the whole term. And if the property barely covers its mortgage today, pulling cash out raises the payment on an asset that’s already thin.
DSCR lenders and the non-bank route
If your tax returns show heavy depreciation write-offs and your debt-to-income ratio looks ugly on paper, a DSCR loan can get you approved when a bank won’t. These qualify the property rather than the borrower. Rates run one to two points above conventional, terms are often 30-year fixed or a 5/1 ARM, and documentation is lighter. What you buy with that premium is speed and a lender who doesn’t care that your Schedule C shows almost no net income. Self-employed investors with five doors often use them for exactly that reason.
What the calendar looks like
Conventional refinances on rentals typically close in 30 to 45 days. Appraisals are the long pole, and rent schedules add a step owner-occupied files never see. DSCR and portfolio lenders can move in two to three weeks when your paperwork is ready. Have these in hand from day one: current lease, rent roll for every unit, two years of Schedule E, insurance declarations, and an HOA statement if there is one. Missing lease pages is the most common reason an investment refinance stalls.
Tax angles most landlords miss
Cash-out proceeds are not taxable income, which surprises people. The interest deduction is where it gets interesting. Trace the money. Use proceeds to improve the rental or buy another one and the interest generally stays deductible against rental income. Use it to clear credit cards or fund a vacation and that slice of the interest may not be deductible at all. Keep a paper trail showing where the funds went, and talk to a CPA who works with investors before closing rather than after.
Questions to settle before you sign
Ask the loan officer for prepayment penalty language in writing, including whether it’s a flat percentage or yield maintenance. Ask what the rate would be at 70% LTV instead of 75%, because pricing improves at lower leverage tiers and a slightly smaller cash-out can pay for itself. Ask how long the rate lock runs and what a 15-day extension costs. Ask whether the lender will service the loan or sell it, since servicing transfers change where payments go and how late fees land.
One more thing worth pricing before you commit: a HELOC on an investment property. It won’t lower your first mortgage rate, but it hands you access to equity without resetting a low-rate loan you might want to keep, and on a property you plan to hold for a decade that flexibility is often worth more than the refinance math suggests.