Guides · 2 minute read
How to analyze a rental property
A repeatable path from a promising listing to a decision you can explain.
1. Verify the income
Start with rent you can defend, not the seller’s best-case number. Check the current lease, comparable rentals, concessions, parking or storage income, and which utilities tenants pay. Then subtract a vacancy allowance even if the unit is occupied today. Five to eight percent is a common starting point, and more for small buildings where one empty unit is a large share of income.
2. Build the operating budget
List property taxes, insurance, association fees, management, repairs, maintenance, landscaping, owner-paid utilities, licensing and routine services. Separate recurring operations from large capital items such as a roof or heating system, and set money aside for those too. Ask for the actual tax bill, and remember that taxes can reset after a sale.
3. Calculate NOI
NOI lets you compute cap rate and compare this property with similar ones before financing enters the picture. Mortgage payments are not an operating expense.
4. Add the financing
Subtract monthly principal and interest from monthly NOI. The result is pre-tax cash flow. Divide annual cash flow by the cash you invested to estimate cash-on-cash return. Include closing costs and immediate repairs when you calculate that cash investment.
Run steps 1 to 4 in one placeThe rental analyzer takes your rent, costs and loan and returns cash flow, cap rate and cash-on-cash return.5. Stress-test the weak points
Run a second case with lower rent, higher vacancy, a repair reserve and the insurance quote you actually received. A deal that only works when every assumption is perfect is not a resilient deal. If a rate change of one point or a month of vacancy flips the verdict, you want to know before you sign.
6. Investigate what the spreadsheet cannot see
Inspect the property, read leases, confirm permits, review association documents, verify tax history, and ask a lender and an insurer for real terms. The calculator organizes the decision. Due diligence protects it.
Common questions
How do you analyze a rental property?
Verify the rent, build a full operating budget, calculate net operating income, add the mortgage to find cash flow and cash-on-cash return, stress-test the assumptions, and then do due diligence on the property itself.
What numbers matter most when analyzing a rental?
Monthly cash flow, cap rate and cash-on-cash return are the core three. Also check the rent-to-price ratio, vacancy assumptions and how much the deal still works under worse conditions.
How much should I budget for maintenance and vacancy?
Common starting points are 5% to 10% of rent for maintenance and 5% to 8% for vacancy, with extra reserves for older properties. Use quotes and local data in place of rules of thumb when you can.
Educational content, not investment, tax, legal or lending advice. Last updated .