How lenders underwrite nightly rental income, which documents carry weight, and the two issues that quietly kill most STR investments.
A short-term rental DSCR loan runs on the same arithmetic as any DSCR loan: income divided by PITIA. What changes is where the income comes from and how much a lender trusts it.
A long-term rental has a signed lease. It is a contract, it names a rent, and it runs for a term. Nightly rental has no lease. It has a revenue history that swings with seasonality, local events, platform algorithms, and how well the property is managed.
Lenders respond to that volatility with tighter leverage, higher reserve requirements, and more documentation. None of it makes STR properties unfinanceable. It makes preparation matter more.
Three approaches, roughly in order of lender preference.
Platform revenue history. Twelve months of statements from Airbnb, Vrbo, or your property manager, in the current owner's name. This is the strongest evidence and produces the best terms.
Third-party market data. For a property with no operating history, some lenders accept a projection from a recognized short-term rental data provider for that specific address and configuration.
Appraiser long-term market rent. The conservative fallback: underwrite as though it were a standard rental using Form 1007. It ignores the STR premium entirely, so it usually produces the weakest ratio, but it is the most widely accepted.
If you are buying an operating STR, ask the seller for platform statements during due diligence. Their history frequently transfers into your file.
The most common mistake investors make is running DSCR against gross nightly revenue. Lenders do not.
Expect deductions for vacancy and seasonality, platform service fees, cleaning and turnover costs, and management if the property is professionally managed. What remains is the number underwriting uses.
The gap between gross bookings and qualifying income is often substantial. Build your model on net, and an investment that looked marginal on paper will either hold up or reveal itself early, both better than finding out in underwriting.
More short-term rental financing dies on local ordinance than on ratio.
Cities and counties regulate nightly rental in wildly different ways: outright bans, permit caps, primary-residence requirements, minimum stay rules, and zoning limits. Some jurisdictions have reversed course after investors bought in.
Lenders know this. Many require evidence that the use is permitted at that address, and some will not lend in specific municipalities regardless of the numbers.
Verify the rules before you go under contract, not during due diligence. Confirm at the municipal level, get it in writing where possible, and check whether an HOA imposes its own restrictions, an association can prohibit nightly rental even where the city permits it.
A standard landlord policy generally will not cover nightly rental, and a homeowner's policy certainly will not. Carriers treat short-term rental as a commercial use.
You need a policy written for it, with adequate liability limits and coverage for guest-caused damage. Platform host protection is not a substitute; lenders do not accept it as primary coverage.
This surfaces late and delays closings routinely. Get quotes while you are still in due diligence.
Send us the scenario and we will tell you what is financeable and what is not.