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 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 products differ most in what they qualify — your income (conventional), the property's cash flow (DSCR), a banking relationship (portfolio), or the asset's NOI and your track record (commercial).
- Conventional often offers attractive pricing for borrowers who qualify, but with the strictest documentation, a limit on financed properties, and a narrow treatment of STR income: as of September 2026, Fannie Mae counts short-term-rental income only on a one-unit investment property legally permitted to operate as one, at half of the gross figure (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).
- DSCR trades a somewhat higher rate for property-based qualification, LLC vesting, and room to scale — which is why it fits so many STR investors.
- Portfolio and commercial loans exist for the situations the first two reject: unusual profiles, larger or multi-unit assets, and portfolio-scale borrowers.
- The right choice is a matter of fit — qualification path, LTV, term, and scale — not the lowest advertised rate.
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. Get that framing right and the choice mostly makes itself.
A conventional loan asks about you: your documented income, your debt-to-income ratio, 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: what NOI does the property throw off, and have you run one before. Rate matters, but it's downstream of that question — and choosing the lane where your deal is strongest usually beats shaving an eighth of a point in a lane where it's weak.
The four, side by side
Each product has a qualification basis it's built around, a rate posture, an LTV and term profile, and a borrower it fits — and for STRs, one of them (conventional) carries a specific limitation worth naming up front. Read the table for the shape, then the notes for the STR-specific edges.
| 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 | 30-yr fixed | 30-yr fixed; IO 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, Sept 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 September 2026; every other cell is a common market posture, 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 edges the table can't fully carry:
Conventional's hidden catch. Its pricing is often attractive when you qualify, but its treatment of STR income is narrow. As of September 2026, Fannie Mae's Selling Guide (B3-3.8-03) lets a lender count short-term-rental income only on a one-unit investment property legally permitted to operate as an STR — estimated from comparable short-term rentals or the appraiser's rent schedule on a purchase, or from your Schedule E on a refinance, cut to 50% on a purchase, and usable only to offset that property's own payment, never to add qualifying income (a lender may instead treat STR income as business income under separate rules). And Fannie Mae's DU framework allows up to 10 financed properties for second-home and investment transactions — 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 STR 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, the scaling, and anyone who needs the STR's own income to carry the file. The cost is a somewhat higher rate and program-by-program variation. (See DSCR Loan Requirements and How to Qualify.)
When portfolio or commercial is the answer. Portfolio loans live at community and regional banks that keep the loan in-house, so they can flex on the rules for a borrower they know — useful for an unusual profile or a property the agencies reject, often at the cost of an ARM or balloon structure. Commercial loans take over for larger multi-unit or commercial-type assets — Fannie's residential eligibility stops at one-to-four units — 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 — and let the deal itself (and the seasonal-cash-flow work in How Loan Structure Interacts With Seasonal STR Cash Flow) guide the fixed-vs-adjustable and amortization choices.
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 whose qualification your property and profile answer most strongly — not the one with the lowest advertised rate, and not the one you used last time. Choose the lane first; price it second.
shopping for the lowest rate across all four products and defaulting to conventional because it wins on price. Conventional's rate is only relevant if you can actually qualify there — and 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 fitting lane 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. Documented income, property cash flow, a bank relationship, or asset NOI + experience — which is your strongest card?
- Match it to a lane. Conventional, DSCR, portfolio, or commercial — pick where your strength is the thing being tested.
- Check the STR fit. If your case rests on nightly income, know conventional counts STR income only narrowly — 50% of the gross as an offset on a permitted one-unit investment property, or as business income at the lender's call; if you're scaling, watch Fannie's 10-financed-property limit.
- Confirm the structural profile. Term, amortization, and fixed-vs-adjustable differ by lane (ARMs/balloons are common in portfolio and commercial) — make sure it suits a seasonal asset.
- 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 (business-income treatment aside) — and eventually runs into the 10-financed-property limit; DSCR qualifies the property and fits many STR investors' real situation; portfolio and commercial exist for the profiles and assets the first two turn away. Choose the lane by fit, confirm the structure suits a seasonal cash flow, and only then compete on rate. 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. The worked example is an illustrative model, not a projection or a recommendation.
