DSCR vs. Conventional vs. Portfolio vs. Commercial Loans for an STR
Four ways to finance the same short-term rental, and they don't compete on rate so much as on how they qualify you. Choose the wrong lane, meaning the wrong kind of loan for your deal, and a good deal gets declined; choose the right one and it closes. Here's what separates the four, and how to match one to your deal.
Matt NunnFounder, Builders Finance12 min readOn this page3 sections
Key takeaways
- The four loan types differ most in what they qualify you on: your income (conventional), the property's cash flow (DSCR), a banking relationship (portfolio), or the asset's NOI and your track record (commercial). DSCR stands for debt service coverage ratio. NOI is net operating income, what the property earns after operating costs and before loan payments.
- Conventional loans often offer attractive pricing for borrowers who qualify, but they come with the strictest documentation, a limit on how many financed properties you can have, and a narrow treatment of STR income: as of October 2026, Fannie Mae's Selling Guide (B3-3.8-03, dated 09/02/2026) counts short-term-rental income only on a one-unit investment property legally permitted to operate as one, at half of the gross figure on a purchase or from your tax-return cash flow on a refinance, and only to offset that property's own payment. A lender may instead treat STR income as business income. How Lenders Calculate Short-Term Rental Income has the full treatment.
- A DSCR loan charges a somewhat higher rate. In return, it qualifies on the property rather than on you, lets you hold title in an LLC (called LLC vesting), and leaves room to scale. That trade is why it fits so many STR investors.
- Portfolio and commercial loans exist for the situations conventional and DSCR loans reject: borrowers with unusual profiles, larger or multi-unit assets, and borrowers with large portfolios.
- The right choice comes down to fit, not the lowest advertised rate: how you qualify, the LTV (loan-to-value: the loan as a share of the property's value), the term, and your scale.
They compete on qualification, not on rate
The four loan types aren't four prices for the same thing — they're four different questions a lender can ask to decide whether to lend. The product that fits is the one whose question your deal can answer best. Once you see them this way, the choice mostly makes itself.
A conventional loan asks about you: your documented income, your debt-to-income ratio (DTI, your debt payments as a share of your income), and your credit. A DSCR loan asks about the property: does its rent cover its payment? A portfolio loan asks about the relationship: what will this bank do for a customer it knows, holding the loan on its own books? A commercial loan asks about the asset and the operator: how much NOI does the property produce, and have you run one before?
Rate matters, but it comes after that question. Choosing the lane where your deal is strongest usually beats shaving an eighth of a percentage point off the rate in a lane where it's weak.
The four, side by side
Each loan type is built around one way of qualifying you, with its own typical pricing, down payment and term, and best-fit borrower — and for STRs, conventional carries a specific limitation worth naming up front. Read the table, then the notes for STR-specific details. In the table, PITIA is principal, interest, taxes, insurance and any homeowners-association dues, and "am" is amortization, the period the payments would take to pay off the loan.
| Conventional (agency) | DSCR (non-agency) | Portfolio (bank) | Commercial | |
|---|---|---|---|---|
| Qualifies on | your income + DTI + docs; property rent at a haircut | property cash flow (rent ÷ PITIA) | blend of income, property, + bank relationship | property NOI + sponsor experience |
| Rate posture | typically lower-cost when eligible | modestly above conventional | relationship-dependent | varies widely by deal |
| Down / LTV | 15% (1-unit) / 25% (2–4 unit) | ~20–25% down | negotiable, often 20–30% | ~25–35% down |
| Term | 15-, 20- or 30-yr fixed, or ARM | 30-yr fixed; interest-only options | often ARMs / balloons | ~25-yr am, 3–8 yr balloon |
| STR income | narrow: 50% of STR rent as an offset on a permitted 1-unit investment property (Fannie Mae B3-3.8-03, as of Oct 2026), else LT rent; business-income treatment possible | yes, lender-derived | negotiable | via property financials |
| Best fit | documented-income buyers, early portfolio | self-employed, LLC, scaling, STR income | unusual profiles + a bank relationship | 5+ unit / commercial-type asset; larger or specialized |
Conventional down payments and STR-income treatment are Fannie Mae's rules as of October 2026 (Eligibility Matrix dated 5 Aug 2026; Selling Guide B3-3.8-03, dated 09/02/2026); every other cell is common market practice, not a rule, and varies by lender and deal. The column that fits is the one whose "qualifies on" row your property and profile answer most strongly.
Three STR-specific points the table can't fully show:
Conventional's hidden catch. Its pricing is often attractive when you qualify, but its treatment of STR income is narrow. As of October 2026, Fannie Mae's Selling Guide (B3-3.8-03, dated 09/02/2026) lets a lender count short-term-rental income only on a one-unit investment property legally permitted to operate as an STR. On a purchase, the income is estimated from comparable short-term rentals or the appraiser's rent schedule, then cut to 50%; on a refinance, it comes from your Schedule E (your tax return's rental schedule). It can only offset that property's own payment, never add qualifying income. A lender may instead treat STR income as business income under separate rules.
As of October 2026, Fannie Mae's Selling Guide (B2-2-03, dated 11/05/2025) allows up to 10 financed properties on second-home and investment loans run through its automated underwriting system, Desktop Underwriter (DU), so conventional financing eventually becomes a constraint for a scaling investor. There's nuance about what counts toward the limit: certain LLC-held properties you're not personally obligated on may be excluded (Fannie Selling Guide B2-2-03).
It's a fine tool for an early, documented-income buyer, and a trap if you assume it will underwrite your STR performance. See How Lenders Calculate Short-Term Rental Income.
Why DSCR often fits STR investors. It qualifies the property, not your paycheck, allows LLC vesting, and doesn't stop at the conventional financed-property limit. So it fits the self-employed, investors who are scaling, and anyone who needs the STR's own income to qualify. The cost is a somewhat higher rate and rules that vary by program. See DSCR Loan Requirements for an STR, and How to Qualify.
When portfolio or commercial is the answer. Portfolio loans come from community and regional banks that keep the loan in-house, so they can bend the rules for a borrower they know. That helps with an unusual profile or a property conventional loans reject, often at the cost of an ARM (an adjustable-rate mortgage) or a balloon (the unpaid balance comes due in one lump sum). Commercial loans take over for larger multi-unit or commercial-type assets; Fannie Mae's residential eligibility stops at one-to-four units. They're underwritten on the asset's NOI and your experience, typically on a shorter amortization with a balloon.
How to choose
Pick the lane by asking which question your deal answers best — then compare rate and terms within that lane, not across lanes. The sequence matters: lane first, price second.
Run yourself through the four questions:
- Do you have clean, documented income and are you early in your portfolio — and can the deal work without its nightly income carrying the loan? Conventional may give you the cheapest money.
- Are you self-employed, buying in an LLC, scaling, or reliant on the STR's own income? DSCR is likely your lane.
- Do you have a real relationship with a community bank and a situation that doesn't fit a box? Ask them about a portfolio loan.
- Is this a larger multi-unit asset or a portfolio play, and have you operated before? You're in commercial territory.
Once the lane is chosen, then shop rate, term, and structure among lenders in that lane. Let the deal itself, and the seasonal cash-flow analysis in How Loan Structure Interacts With Seasonal STR Cash Flow, guide your choice between a fixed and an adjustable rate, and the amortization.
Fit the loan to the deal, not the deal to the loan.
Each product qualifies on a different thing and suits a different borrower. The right loan is the one that tests what your property and your profile are strongest at — not the one with the lowest advertised rate, and not the one you used last time. Choose the lane first; compare prices second.
The mistake is shopping for the lowest rate across all four loan types and defaulting to conventional because it wins on price. But conventional's rate only matters if you can actually qualify there. On an STR whose case rests on nightly income, or once you're past the financed-property limit, you often can't. Chasing the cheapest lane instead of the one that fits is how investors end up declined on a deal that a DSCR or portfolio lender would have closed.
Your action plan
- Name your qualification strength. Which is your strongest: documented income, the property's cash flow, a bank relationship, or the asset's NOI plus your experience?
- Match it to a lane. Of conventional, DSCR, portfolio and commercial, pick the one that tests the thing you're strongest at.
- Check the STR fit. If your case rests on nightly income, know that conventional lending counts STR income only narrowly: 50% of the gross, as an offset, on a permitted one-unit investment property, or as business income if the lender treats it that way. If you're scaling, watch Fannie Mae's 10-financed-property limit (Selling Guide B2-2-03, dated 11/05/2025; as of October 2026).
- Confirm the loan's structure. The term, the amortization, and whether the rate is fixed or adjustable differ by lane; ARMs and balloons are common in portfolio and commercial loans. Make sure the structure suits a property whose income is seasonal.
- Then compare within the lane. Shop rate and terms among lenders in your chosen lane, not across lanes.
- Re-check as you scale. The lane that fit your first property may not fit your fifth — reassess with each deal.
The bottom line
Conventional, DSCR, portfolio, and commercial loans aren't four prices for one product. They're four different qualification questions, and the one that fits is the one your deal answers best. Conventional is often cheapest when you qualify, but it counts STR income only narrowly (half the gross, as an offset, setting aside the separate business-income route) and eventually runs into Fannie Mae's 10-financed-property limit (Selling Guide B2-2-03, as of October 2026). DSCR qualifies the property and fits many STR investors' real situation. Portfolio and commercial exist for the profiles and assets conventional and DSCR turn away. Choose the lane by fit, confirm the structure suits a seasonal cash flow, and only then compare rates. The cheapest loan you can't qualify for isn't cheap — it's a decline.
Educational information only — not individualized tax, legal, or investment advice. Loan terms, limits and program rules change and vary by lender; confirm them with the lender when you apply.
