STR ROI & Cap Rate Calculator
Pressure-test a short-term-rental deal before you buy: enter the purchase, financing, revenue, and operating costs to see NOI, cap rate, cash-on-cash return, and monthly cash flow.
Deal inputs
Purchase & financing
Revenue
Annual operating expenses
Results
| Gross annual revenue | — |
| Operating expenses | — |
| Net operating income (NOI) | — |
| Annual debt service (mortgage) | — |
| Annual pre-tax cash flow | — |
| Loan amount | — |
| Total cash invested | — |
Like the numbers? Oikos can run the property.
If the deal pencils out, we co-host properties end to end — setup, pricing, guest messaging, cleaning, and reviews. You own the asset; we handle the operating.
See how Oikos co-hosting works →How to use this calculator
- Enter the dealPurchase price, your down payment, the rate and term you're quoted, plus closing and furnishing costs.
- Project revenueUse a realistic ADR and occupancy for the market — AirDNA or comparable nearby listings are good sources.
- Add real expensesDon't skip the maintenance reserve and management fee. Conservative inputs keep you out of trouble.
FAQ
How is cap rate calculated for a short-term rental?
Cap rate equals annual net operating income (NOI) divided by the purchase price, as a percentage. NOI is gross revenue minus operating expenses — but it excludes your mortgage. That lets you compare properties independent of financing.
What is a good cash-on-cash return for an Airbnb?
Cash-on-cash is annual pre-tax cash flow divided by total cash invested (down payment plus closing and startup costs). Many STR investors target 8–12%+, but the right number depends on your market, risk tolerance, and appreciation outlook.
Should I include my mortgage in the cap rate?
No. Cap rate deliberately excludes financing. Your mortgage does affect cash flow and cash-on-cash return, which is why both are shown separately above.
What expenses should I include?
Cleaning, supplies, utilities and internet, management/co-host fees, insurance, property taxes, and a maintenance/CapEx reserve. STR costs run higher than long-term rentals because of turnover and guest-facing services.