How private lenders underwrite short-term rental properties, what AirDNA data shows, and how to qualify for DSCR financing when you have no traditional rental history.
The short-term rental market — Airbnb, VRBO, Hipcamp, and others — created a category of real estate investor that conventional financing wasn't built to serve. Traditional mortgage lenders almost uniformly refuse to use projected Airbnb income as qualifying income because it is unpredictable, seasonal, and platform-dependent. But short-term rental properties, when well-located and well-managed, often generate 1.5x–3x the gross income of a comparable long-term rental — and private DSCR lenders have developed programs specifically designed to underwrite this income.
The income calculation for short-term rental DSCR loans typically relies on one of three data sources: 12 months of your own Airbnb income history (if the property is already operating as an STR), a market analysis report from AirDNA or similar platforms showing projected revenue for the subject market, or an appraisal with a short-term rental income addendum prepared by an appraiser with STR expertise. Each lender handles this differently — some will use AirDNA projections for new acquisitions, others require 12 months of actual history before they'll use STR income. Knowing your lender's policy before you close on a purchase is essential.
Occupancy rate assumptions are the most important variable in STR underwriting. A beach house that grosses $120,000 at 90% occupancy might only generate $60,000 at 45% occupancy — two very different DSCR outcomes. Lenders applying STR DSCR analysis typically use a stabilized occupancy assumption (often 60%–70%) rather than peak projections, and they may apply a management fee expense (25%–35% of gross revenue for platform fees and property management) to the income calculation. Make sure you understand what the lender's income assumption is and whether it reflects realistic underwriting or an overly optimistic projection.
Location is critical for STR DSCR underwriting. Markets with strong tourism demand, seasonal patterns that result in high average occupancy across the year, and limited new supply of STR inventory are the most underwritable. Markets with volatile demand, heavy HOA restrictions on short-term rentals, or regulatory uncertainty (cities considering STR bans or licensing restrictions) are viewed more cautiously by lenders. Before purchasing an STR property, research the local regulatory environment thoroughly — a city council vote can change the income assumptions for your property overnight.
One nuance many STR investors overlook is the difference between the property's gross revenue and its net income. Gross revenue on an Airbnb includes platform fees (Airbnb typically charges guests 14%–16% and hosts 3%), cleaning fees (which flow to your cleaner, not your pocket), and peak-season pricing that may not be sustainable year-round. When a lender asks for your income history, they typically want to see the net payouts from the platform to you — not the gross booking amounts. Know your numbers at the net level before you approach a lender, and be prepared to explain how you arrived at your annual income figure.