Which Loan Structure Fits This STR Deal?

Two decisions, stacked

Picking a loan feels like one choice but it's really two: which lane you qualify in, and how the loan inside that lane is structured. Get the order right — lane first, structure second — and the decision gets much simpler. Most confusion comes from mixing the two.

The lane is the kind of loan: conventional, DSCR, portfolio, or commercial. It's decided by how you qualify — and for STRs, often by whether you can use the property's nightly income at all.

The structure is what the loan looks like inside that lane: fixed rate or adjustable, interest-only or amortizing (paying down principal with every payment), thirty years or fewer. It's decided by things a side-by-side comparison of loan products can't show you — how long you plan to hold, and how the property's income arrives across the year. Work them in that order, because the lane narrows your structure options, not the other way around.

Decision 1: which lane can you use?

The lane is settled by how you qualify. For an STR, the key question is whether the loan can be underwritten on the property's own income, or only on documented personal income, with the property's own rental income counted narrowly. Underwriting is the lender's approval review. That single question decides the lane for most deals.

Here's the short version of the product decision; the full comparison is in DSCR vs. Conventional vs. Portfolio vs. Commercial Loans for an STR.

• If you have clean documented income, you're early in your portfolio, and the deal works on the appraiser's long-term market rent, a conventional loan often offers attractive pricing when you qualify. But remember that it counts STR income only narrowly: 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 (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. And 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 eventually becomes a constraint as you scale.
• If your case rests on the STR's own income, you're vesting in an LLC (taking title in its name), or you're scaling past agency limits, a DSCR loan is usually the lane, qualifying on the lender's determined income for the property.
• If you have a real relationship with a community bank and a situation that doesn't fit a standard box, ask about a portfolio loan.
• If it's a larger multi-unit or commercial-type asset, you're in commercial territory.

Pick the lane that tests the thing you qualify best on, then choose the structure within it.

Decision 2: structure — matched to hold and cash flow

Inside the lane, the structure is decided by two things: how long you'll hold the property, and the seasonal shape of its income. Those two — not the headline rate — tell you fixed vs. adjustable, interest-only or not, and the term. This is where a seasonal STR needs more care than a home paid for from a W-2 salary.

Fixed vs. adjustable. A fixed rate keeps the one thing you control, the payment, knowable for the life of the loan. That makes it the conservative baseline on a property whose income varies, because an ARM stacks rate movement on top of income movement. Prefer predictable debt unless the discount for taking reset risk is large enough and your plan can absorb the reset. For example: a short expected hold with a firm plan to sell or refinance before the ARM adjusts. Make an ARM a deliberate choice with the reset modeled, never a reach for the teaser rate, the low opening rate. How Loan Structure Interacts With Seasonal STR Cash Flow has the full treatment.

Interest-only or amortizing. An interest-only period lowers the payment now, which is real relief for a seasonal cash flow. But it builds no equity, and the payment jumps when it ends. It earns its place only when you understand why you're taking the relief and have modeled the amortizing payment before you close. Typically that comes with a plan to be out of the interest-only (IO) structure, through a sale or refinance, before it recasts, when the payment resets to include principal. No plan for the reset, no interest-only.

Term. A 30-year term is the baseline. It minimizes the monthly obligation and the loan constant, a year's loan payments as a share of the original loan amount. That matters most on a seasonal property that has to clear its break-even every year. Break-even occupancy is the occupancy the property needs just to cover its costs, including any loan payments. A shorter term builds equity faster but raises the payment and the break-even. It's reasonable only if the cash flow can carry it comfortably through the off-season.

The recommendation: work the path, then shop rate

Settle the lane by qualification, set the structure by your hold and the seasonal cash flow, pick the term for the payment you need — and only then compare rates among lenders inside that box. Doing it in that order keeps you from letting a headline rate pull you into a structure that doesn't fit the deal.

For most STR investors the path lands in a familiar place: a DSCR loan (because the deal leans on the property's own income), 30-year fixed (because the income is seasonal and the hold is open-ended), amortizing (because there's no firm near-term exit). That's a sensible default for that profile — but it's a default you arrive at by working the path, not by assuming.

Change the inputs — a short, planned hold; a genuine rate discount; documented income that qualifies conventionally — and the path legitimately lands somewhere else. The point is to let the deal's own facts choose the structure, then let lenders compete on rate in the last step, where that belongs.