Most rental deals fall apart for a boring reason. The property looked great in the buyer’s head, and then the lender’s numbers came back different. Take a duplex listed at $285,000 in Dayton, Ohio, with two units renting for $1,700 each. That deal can close. It can also collapse in week three if you handle the financing in the wrong order.
Here’s the same property walked through six steps, using the actual figures a lender would work from.
Step 1: Let the Rent Set the Price, Not the Listing
Start with debt service coverage, not with how much cash you have sitting around. Lenders on rental property loans generally want the building to cover its own payment, and they measure that with a DSCR: qualifying rent divided by the full monthly payment.
On this duplex, the numbers shake out like this.
- Loan amount: $213,750 (75% of $285,000) at 7.25% over 30 years = $1,458 in principal and interest
- Property taxes: $4,750 a year = $396 a month
- Landlord insurance: $1,700 a year = $142 a month
- Total payment (PITIA): $1,996
- Qualifying rent: 75% of $3,400 = $2,550
$2,550 divided by $1,996 gives a DSCR of 1.28. That clears the 1.20 to 1.25 floor most lenders use, with some room for the appraiser to come in lower on market rent than the listing agent guessed.
Next, check whether you’d actually want to own the thing. Real rent of $3,400 minus the $1,996 payment leaves $1,404. Set aside 8% each for vacancy, repairs, and a property manager and you’re at $816 in expenses, or roughly $588 a month in cash flow. Add the $71,250 down payment, about $7,100 in closing costs, and six months of reserves at $11,976, and you’re in for roughly $90,000. That’s a cash-on-cash return near 7.8%. Unspectacular, but real.
If you have the cash to buy outright, run that comparison properly before you decide. The math most buyers never actually run flips the answer more often than people expect at today’s rates.
Step 2: Match the Loan Product to the Property and Your Tax Returns
There is no single investment property mortgage. At least four products fit this same duplex, and they price very differently.
DSCR loans
These qualify on the property’s rent alone. Your W-2, your debt-to-income ratio, and your tax returns barely come into it. The trade-off is a higher rate, often 0.5% to 1% above conventional, plus a prepayment penalty and 20% to 25% down as a starting point.
Conventional investment property loans
Fannie Mae and Freddie Mac will back loans on rentals, but the payment counts against your personal DTI, you’re capped at 10 financed properties, and reserve requirements get steeper with each one. Cheaper rate, no prepayment penalty.
Portfolio and local bank loans
A community bank holding the loan on its own books can be more flexible on credit events or odd property types. You usually pay for that with a shorter term or a balloon.
If the property needs a full rehab before it rents, bridge money followed by a refinance into a permanent loan is the standard route. It’s also where people get hurt, because the bridge loan prices off the exit. Financing a rental without getting burned mostly comes down to making sure the refinance is still there when you need it.
Push past the conforming limit of $806,500 and the product set shifts again. The difference between a jumbo and a conventional mortgage matters more on rentals than on primary homes, because jumbo investors get pickier about reserves and property condition.
Step 3: Get Pre-Approved With Real Rent, Not Hopes
A generic pre-approval letter does nothing for you here. You want one that names a purchase price, a loan amount, a down payment, and a documented rental figure. On a vacant property that figure comes from an appraiser’s market rent analysis rather than a lease, and the lender orders it during underwriting.
Have these ready before you write an offer: existing leases or signed letters of intent from tenants, two months of statements for every account holding your down payment and reserves, and a list of every other mortgage you carry. Sellers who own rentals themselves will want proof you can actually close.
Step 4: Know Which Levers Move Your Rate
Small changes on a $213,750 loan produce large differences.
- Credit score: 780 gets 7.25%, 700 gets closer to 8.125%. That’s $1,458 versus roughly $1,587 a month, or about $46,000 more over 30 years
- Down payment: 25% down is standard, 20% sometimes shows up at a worse rate, and 15% usually means paying for it in points
- Points: one point costs $2,138 on this loan and buys the rate down by roughly 0.25%
- Prepayment penalty: a 5-4-3-2-1 structure lowers the rate, but you’ll pay to sell or refinance inside five years
Ask for the rate sheet with several combinations priced out. Lenders will send it if you ask directly, and the spread between scenarios is usually wider than borrowers assume.
Step 5: What Underwriting Will Actually Ask For
The appraisal is the big one, because the appraiser completes a rent schedule alongside the value opinion. If market rent lands at $1,500 per unit instead of $1,700, your DSCR drops to about 1.13 and the lender may ask for more down.
Beyond that, expect:
- Entity documents if you’re taking title in an LLC, plus a personal guarantee
- A DP-3 landlord policy instead of an owner-occupied HO-3, with replacement cost coverage
- A separate flood policy if the property sits in a Special Flood Hazard Area
- Reserves verified in retirement or brokerage accounts, not just checking
Start the insurance quote on day one. A 1960s duplex with a 20-year-old roof can come back at three times your budget, and that hits the DSCR the same way a lower rent does.
Step 6: Close, Then Plan the Next Twelve Months
Conventional loans usually require taxes and insurance in escrow. DSCR loans often let you pay them yourself, which frees up monthly cash but demands the discipline to set the money aside. Either way, keep the records, because every payment builds the file that supports the next purchase.
Refinancing out of a hard money loan typically needs six to twelve months of seasoning. If you’re buying a place you’ll use part of the year and rent the rest, the rules shift toward second-home underwriting, which is a different set of trade-offs. A step-by-step look at how second home mortgages actually get approved covers the numbers on that path, and choosing between vacation home mortgage types matters even more if you plan to run it as a short-term rental.
The Three Things That Kill These Deals
In practice, rental purchases fail at the same three points. The appraisal rent schedule comes in below the listing agent’s estimate, which shrinks qualifying income. The insurance quote blows past the assumed number, which raises the payment. Or the buyer’s reserves get thin because the same savings were counted toward two different down payments.
Any one of those is survivable. Closing a rent gap means a bigger down payment. Fixing insurance means shopping three carriers early and taking a hard look at the roof. Fixing reserves means walking away from a deal that needs more cash than you have.
Run the DSCR before you tour the property. Get the insurance quote before the inspection period ends. Keep a reserve pile that only one deal can touch. Do those three things and the financing stops being the risky part of the transaction.