Investment Grade STR

How to Analyze a Short-Term Rental Before You Buy It

Most short-term rental analysis fails in the same place: it starts with the seller’s revenue number and works forward. Investment Grade STR runs the analysis in the opposite direction. Build the revenue estimate independently, verify the seller’s claim against it, then test whether the property survives when the short-term rental strategy is removed entirely. That second test is dual-track underwriting, and it is what separates an investment grade short-term rental from a bet on a permit.

What follows is the sequence, in order. Each step answers one question, and each answer either advances the deal or ends it.

Step 1. What revenue will this property actually produce?

Build the revenue estimate from comparable properties before looking at anything the seller provided. The output you want is RevPAN, revenue per available night, which is average daily rate multiplied by occupancy. RevPAN is the only rate metric that survives comparison across seasons and submarkets, because a high ADR on a thin calendar produces less income than a moderate ADR on a full one. Pull comps that match the property on bedroom count, guest capacity, and the amenities that actually drive booking in that market, then annualize. A property with a $310 ADR at 66 percent occupancy produces a RevPAN of roughly $205, or about $74,700 of gross revenue across a full year.

Step 2. Is the seller’s income figure verifiable?

Now compare your number to theirs. Listing remarks and seller pro formas are marketing documents. Gross revenue claims in them routinely include cleaning fees collected from guests and paid straight out to cleaners, exclude platform commission, exclude management fees, or quietly omit owner-blocked nights from the occupancy denominator. Ask for twelve months of platform payout statements and a Schedule E. Where the seller’s figure and your comp-derived figure disagree, underwrite the lower one and label the gap in writing. If no statements are produced, underwrite the property as though it had no operating history at all. An unverified number is not a conservative number; it is an unknown one.

Step 3. What does it actually cost to operate?

A short-term rental is a hospitality business wearing a house. The expense stack that decides the deal is the one omitted from optimistic pro formas: professional management, platform commission, the portion of turnover cleaning not recovered by guest fees, consumables and restocking, utilities the owner carries year round, insurance under a short-term rental endorsement rather than a standard homeowner policy, permit and licensing fees, lodging tax compliance, ordinary maintenance at hospitality frequency, and a furniture and soft goods replacement reserve on a three to five year cycle. That last reserve is the single most commonly missing line in short-term rental underwriting. Furniture in a property turning over fifty times a year does not last the way furniture in a primary residence lasts.

Step 4. What is the long-term rental floor?

Model the property a second time as a conventional long-term rental at market lease rates, with long-term expenses and a standard landlord insurance policy. This number is the floor. It is what the property produces if the municipality caps permits, if the permit fails to transfer at sale, if the operator stops actively managing, or if demand in the submarket reprices. A property that only clears debt service on the short-term track is exposed to a single regulatory and demand regime. A property that clears on the long-term track is real estate with an operating business layered on top, and those are different risk instruments at the same address.

Step 5. Does it finance on either track?

Divide net operating income by annual debt service to get DSCR. Run it twice, once on each track. Most short-term rental DSCR programs set a floor around 1.00 to 1.25, with the best pricing above 1.25, and some lenders will fund below 1.00 with a rate and leverage adjustment. What varies more than the floor is what the lender counts as income. Some underwrite from a twelve-month trailing statement, some from a third-party market estimate, and some disregard short-term rental income entirely and qualify the property on a long-term market rent appraisal. That last posture is common enough that the long-term track is not a theoretical exercise. It is frequently the number the loan is actually written against.

What does a dual-track analysis look like on a real deal?

The following is an illustrative example, not a market claim. Figures are shown to demonstrate the structure of the calculation.

Line STR track LTR track
Purchase price $550,000 $550,000
Loan at 75 percent LTV, 7.25 percent, 30 year $412,500 $412,500
Annual debt service $33,768 $33,768
Gross annual revenue $74,679 (ADR $310 at 66 percent) $31,200 ($2,600 per month)
Operating expenses including taxes and insurance $41,026 $13,356
Net operating income $33,653 $17,844
DSCR 1.00 0.53

Read the two columns together. On the short-term track the property covers debt service exactly, with no margin. On the long-term track it falls roughly $1,300 per month short. That is not a reason to reject the deal outright, but it is the precise size of the exposure, and it is a number that a single-track analysis never produces. A buyer who sees only the left column believes they own a property that breaks even. A buyer who sees both columns knows they own a permit.

Step 6. Is the permit real, and does it transfer?

Check four things in sequence: whether short-term rentals are permitted by right or by special permit, whether a numerical cap exists and whether it is currently at its limit, whether the permit transfers to a buyer at sale, and whether the governing rules sit at the city, the county, or the homeowners association level. The fourth is the one most often missed. A property can be fully compliant with municipal code and still be prohibited by its own covenants, and covenants can be amended by a member vote with no public process an investor would ordinarily be watching. Of the four, non-transferability is the provision that destroys value most completely, because it converts an income-producing asset into an ordinary house at the exact moment the owner tries to sell it.

Step 7. Is it insurable at a rational cost?

Hazard exposure reaches the model through three channels: premium, insurability, and exit liquidity. Increasingly the binding constraint is insurability rather than price, because a property no carrier will write is a property no lender will fund and no buyer can close on. The FEMA National Risk Index gives a county-level composite of expected annual loss across eighteen hazard types, which makes it usable as a first-pass screen before any property-specific work. Treat it as a screen and not a verdict. A high composite driven by a hazard that does not touch the specific parcel is a different situation from a high composite driven by wildfire exposure in a wildland-urban interface, and several otherwise strong Western mountain markets fail on that second basis alone.

Step 8. What does the tax position add, and can you use it?

Two provisions matter. First, when the average guest stay is seven days or fewer the activity is not a rental activity under the passive activity rules, so an owner who materially participates can apply losses against non-passive income. Material participation is usually met at more than 100 hours with more hours than any other individual including a manager, or at 500 hours, and the strategy fails on contemporaneous documentation far more often than it fails on the law. Second, a cost segregation study reclassifies short-life components into 5, 7, and 15 year recovery classes, and those classes are eligible for bonus depreciation, which was made permanent at 100 percent for qualified property acquired and placed in service after January 19, 2025. On a furnished turnkey purchase the reclassified share is larger than on an unfurnished long-term rental because the furniture and equipment package transfers with the property. None of this is worth modeling for a buyer who cannot use the deduction in the year it is generated. Confirm that first, with a CPA, before it becomes a line in the analysis.

Step 9. Can you exit it?

Estimate the buyer pool at resale rather than the appreciation rate. A property whose value depends on a non-transferable permit has a buyer pool of owner-occupants. A property in a market with thin transaction volume requires finding the single buyer who wants exactly that asset. Exit liquidity does not appear anywhere in a cash flow model, which is why it is the risk most often discovered rather than underwritten.

Step 10. What grade does it earn?

The nine steps above produce a set of numbers. GradeSTR converts them into a single comparable grade so that properties in different markets, at different price points, and with different regulatory exposure can be ranked against one another. A property that clears on both tracks, holds a transferable permit, and is insurable at rational cost grades differently from a property that produces the same first-year cash flow on the short-term track alone. Both may be worth buying. They are not the same asset.

Where the analysis usually breaks

In practice, deals fail this sequence at three specific points. They fail at Step 2 when no payout statements exist and the entire model rests on a marketing figure. They fail at Step 4 when the long-term floor is so far below debt service that any regulatory change forces a sale into whatever market conditions happen to exist that year. And they fail at Step 6 on permit transferability, which is almost never disclosed voluntarily and almost always determinative. An analysis that stops after Step 1 will miss all three.

To have a specific property run through this sequence, contact Investment Grade STR. The GradeSTR calculator handles the cash flow modeling in Steps 1 through 5, and the acquisition criteria set out the screening standards a property must meet to be considered investment grade.

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