Rental Property Cash Flow Calculator
Analyze your real estate investment potential by calculating monthly cash flow, ROI, and Cap Rate.
Purchase Details
Loan Details
Income & Expenses
Monthly Principal & Interest:
$0.00
Total Monthly Expenses:
$0.00
Net Monthly Cash Flow:
$0.00
Net Operating Income (NOI – Annual):
$0.00
Cap Rate:
0.00%
Cash on Cash Return (ROI):
0.00%
Understanding Rental Property Cash Flow Analysis
Investing in real estate is one of the most reliable ways to build wealth, but success hinges on the numbers. This Rental Property Cash Flow Calculator is designed to help investors evaluate the profitability of a potential purchase. It moves beyond simple mortgage calculations to account for vacancy, maintenance, taxes, and insurance.
Key Metrics Explained
1. Net Monthly Cash Flow
This is the amount of profit you pocket every month after all expenses are paid. Positive cash flow indicates a healthy investment that generates income, while negative cash flow means the property costs you money to hold.
Formula: Monthly Rent – (Mortgage + Taxes + Insurance + HOA + Maintenance/Vacancy Reserves).
2. Capitalization Rate (Cap Rate)
The Cap Rate measures the natural rate of return on the property independent of debt. It helps you compare the profitability of one property against another, regardless of how you finance them. A higher Cap Rate generally implies a better return but may come with higher risk.
Formula: Net Operating Income (NOI) / Purchase Price.
3. Cash-on-Cash Return (CoC ROI)
This is arguably the most important metric for leverage investors. It calculates the annual return on the actual cash you invested (down payment + closing costs), rather than the total property price.
Formula: Annual Cash Flow / Total Cash Invested.
Estimating Expenses for Accuracy
Novice investors often overestimate profit by ignoring "hidden" costs. To get an accurate result from this calculator, ensure you account for:
- Vacancy & Maintenance: We recommend setting aside at least 10-15% of monthly rent for repairs and periods where the property is empty.
- Capital Expenditures (CapEx): Major repairs like roofs or HVAC replacements.
- Property Management: Even if you self-manage now, factoring in 8-10% for management ensures the deal still works if you outsource later.
Use the calculator above to stress-test your deal. Try increasing the interest rate or vacancy percentage to see if the property remains cash flow positive in adverse conditions.