Rental Property Cash Flow Calculator
Analyze your real estate investment deals accurately.
Understanding Rental Property Cash Flow
Investing in rental real estate is one of the most powerful ways to build wealth, but simply buying a property and renting it out doesn't guarantee a profit. Successful investors rely on accurate math to determine if a deal makes sense. This Rental Property Cash Flow Calculator helps you break down the income, expenses, and returns of a potential investment.
Key Metrics Explained
1. Cash Flow
Cash Flow is the profit you bring in each month after all expenses, including the mortgage, have been paid. Positive cash flow means the property is putting money in your pocket every month.
Formula: Total Income – Total Expenses (including Debt Service) = Cash Flow
2. Cash-on-Cash Return (CoC ROI)
This is arguably the most important metric for leveraged real estate. It measures the annual return on the actual cash you invested (down payment + closing costs + immediate repairs), rather than the total price of the property.
For example, if you invest $50,000 cash to buy a $200,000 property and it generates $5,000 in annual cash flow, your Cash-on-Cash return is 10%.
3. Cap Rate (Capitalization Rate)
Cap Rate measures the property's natural rate of return assuming you bought it in all cash. It allows you to compare the profitability of one property against another, regardless of how they are financed. A higher cap rate generally implies a better return (or higher risk).
Formula: Net Operating Income (NOI) / Purchase Price
4. Net Operating Income (NOI)
NOI is the total income the property generates minus all operating expenses (taxes, insurance, maintenance, vacancy, management) but excluding the mortgage payment. This number is critical because banks use it to determine if the property generates enough income to cover the debt.
Common "Hidden" Expenses
New investors often overestimate cash flow by forgetting to account for irregular expenses. This calculator includes:
- Vacancy Rate: Properties are rarely occupied 100% of the time. We typically budget 5% to 8% for turnover periods.
- Maintenance & CapEx: Even if nothing is broken today, the roof and HVAC will eventually need replacement. Setting aside 5-10% of rent monthly ensures you have funds when these big expenses hit.
- Property Management: Even if you self-manage, it's wise to budget for your time or future management needs (typically 8-10% of rent).