Rental Property ROI Calculator
Rental Property ROI Calculator
The Rental Property ROI Calculator is designed for real estate investors who want to evaluate the financial performance of a potential rental property. Investing in rental properties can generate two types of returns: ongoing cash flow from rent collected after expenses, and long-term appreciation in property value. This calculator focuses on the operating metrics that matter most, including net operating income, capitalization rate, monthly cash flow, and cash-on-cash return.
NOI is the foundational metric in real estate analysis. It represents the property's operating profit before financing costs. Cap Rate expresses NOI as a percentage of the purchase price, allowing comparison across different properties. Cash-on-Cash Return measures the return on actual cash invested, making it the most relevant metric for leveraged investors.
Successful rental property investing requires careful expense budgeting. Major expense categories include property management fees at 8 to 12 percent of rent, property taxes, landlord insurance, maintenance reserves of 5 to 10 percent, and a vacancy allowance of 5 to 10 percent.
Enter the purchase price, expected monthly rent, and monthly operating expenses. Provide financing details including down payment, interest rate, and loan term. Include closing costs and initial repairs for an accurate total cash invested figure.
Press Calculate to see gross annual rent, NOI, cap rate, annual debt service, annual and monthly cash flow, and cash-on-cash return. For example, a $250,000 property with $2,000 monthly rent, $800 expenses, and 20 percent down at 7 percent yields a 5.76 percent cap rate and about $2,400 annual cash flow.
Net Operating Income:
Cap Rate:
Annual debt service using amortizing loan formula:
Cash-on-Cash Return:
How leverage affects cash-on-cash return for a $300,000 property with $2,400 rent and $1,000 expenses at 7 percent:
| Down Payment | Cash Invested | Monthly Cash Flow | Cash-on-Cash Return |
|---|---|---|---|
| 20% ($60,000) | $66,000 | $240 | 4.36% |
| 25% ($75,000) | $81,000 | $340 | 5.04% |
| 30% ($90,000) | $96,000 | $440 | 5.50% |
| 100% ($300,000) | $310,000 | $1,400 | 5.42% |
Use the 50 Percent Rule as a quick screening tool: operating expenses will be roughly 50 percent of gross rent. If the property cannot generate positive cash flow under this rule, it may not be worth further analysis. Location is the most important factor. Properties in good school districts near employment centers tend to have lower vacancies.
This calculator does not include income tax effects, which can be significant. Real estate investors benefit from depreciation deductions that can offset rental income. The calculator also does not model capital gains taxes when the property is sold. Actual cash flow in any given month can deviate significantly from annual projections due to vacancies or major repairs.
- What is cash flow in rental property?
- Net income after operating expenses and mortgage are subtracted from rent. Positive cash flow means the property generates more than it costs.
- How is cap rate calculated?
- NOI / Property Value x 100%. Higher cap rate = potentially higher return but may reflect higher risk.
- What is cash-on-cash return?
- Annual pre-tax cash flow / total cash invested x 100%. Most investors target at least 8-12%.
- How does total ROI combine different returns?
- Combines cash flow returns with equity appreciation, principal paydown, and value growth over a holding period.
- What expenses should I include in projections?
- Vacancy (5-10%), taxes, insurance, HOA, maintenance (1% of value/year), property management (8-12%), utilities, and capital reserves.
- The Institute of Real Estate Management. "Income and Expense Analysis." irem.org.
- BiggerPockets. "The Beginner's Guide to Real Estate Investing." biggerpockets.com.
- Investopedia. "Cash-on-Cash Return in Real Estate." investopedia.com.
- Gallinelli, F. "What Every Real Estate Investor Needs to Know About Cash Flow." McGraw-Hill.
Last updated: May 12, 2026