STR Arbitrage (Rent-to-Sublet): Why a DSCR Loan Doesn't Apply

What rental arbitrage actually is

In an arbitrage model, the operator signs a standard residential or master lease with a landlord — often with explicit permission to sublet short-term, since most standard leases prohibit it by default — and pays a fixed monthly rent. The operator then furnishes the unit and lists it on short-term-rental platforms, keeping the spread between short-term booking revenue and the fixed lease payment plus operating costs.

The operator never holds title to the property. There's no purchase, no mortgage, no lien, and therefore nothing for a DSCR loan — which is secured by a deed of trust or mortgage against real property — to be secured against.

Why a mortgage product can't finance a lease

A DSCR loan is fundamentally a purchase or refinance mortgage: it originates against a specific parcel of real estate, gets recorded against the title, and gives the lender a lien position it can foreclose on if the loan defaults. A residential lease has none of those characteristics — it's a contractual right to occupy, not an ownership interest, and there's no title for any lender to record against.

What actually finances an arbitrage operation

Because there's no real estate collateral, arbitrage operators typically fund the business with a mix of personal savings, a business line of credit, equipment or furniture financing, or a personal or business loan — none of which are DSCR products, and all of which are underwritten against the operator's personal or business credit rather than the property's income, since the operator doesn't own the property.

• Furnishing and setup costs: typically funded with cash, a credit card, or a furniture-financing product, not a mortgage.
• Security deposit and first/last month's rent to the landlord: standard leasing costs, unrelated to DSCR underwriting.
• Working capital for the ramp-up period: the same cash-flow gap described in our year-one cash flow post, but funded from savings or a business line, not a mortgage.
• Master-lease arbitrage at scale: sometimes funded with a business loan or investor capital, still not secured by real property the operator owns.

When arbitrage and DSCR actually connect

The two do intersect in one practical way: an investor might use a DSCR loan to buy a property outright, then decide to run it as a short-term rental themselves rather than as an arbitrage tenant — at that point they're an owner-operator financed by DSCR, not an arbitrage operator. Or an investor who's built cash flow through arbitrage might eventually use those savings toward a down payment on their first DSCR-financed purchase. Either way, DSCR only enters once ownership enters.