Calculate annual NOI from rent and complete operating expenses.
Last updated: June 2026
How to analyze a rental property investment.
Rental property screening should include rent quality, operating expenses, vacancy, reserves, debt service, CAP rate, DSCR, cash flow, cash-on-cash return, and sensitivity to less favorable assumptions.
Review income quality
Start with current rent, lease terms, payment history, other income, vacancy, concessions, and whether rents are above or below market. A rent roll is more useful when it is compared with deposits, leases, and actual collections.
Market rent increases should be reviewed with turnover, repairs, local demand, rent restrictions, and tenant quality because those factors can delay or reduce projected income.
Use complete expense assumptions
Include taxes, insurance, property management, maintenance, repairs, vacancy, utilities, HOA dues, reserves, licensing, legal or eviction cost, and capital items that can be missing from a seller's simple expense summary.
Taxes and insurance can change after purchase. Maintenance and capital reserves should be reviewed even when recent expenses look low, especially for older properties or properties with deferred repairs.
Add financing and coverage
Debt service changes the buyer's monthly cash flow and DSCR. A property can show a reasonable CAP rate before financing but still produce thin or negative cash flow after the loan payment.
Review down payment, interest rate, amortization, closing costs, reserves, and lender requirements. The financing structure can be the difference between a stable hold and a fragile one.
Review several metrics
Review CAP rate before financing to compare income yield.
Add debt service and review DSCR plus monthly cash flow.
Compare cash-on-cash return with the actual cash invested.
Stress test vacancy, repairs, insurance, taxes, and interest rate assumptions before deciding whether to continue.
Stress test the downside
A first-pass rental review should include a less favorable case. Reduce income, increase expenses, add vacancy, and test higher financing cost to see whether the property still has enough cushion.
If small assumption changes erase the cash flow, the opportunity may need a lower-risk capital structure, deeper diligence, or a different risk premium.
Continue with the related example.
Use the related KPI example after reviewing the guide.