Investment Property ROI Calculator
Analyze any rental property investment with all key metrics: cash-on-cash return, cap rate, NOI, DSCR, GRM, and 10-year IRR. See cash flow under optimistic, realistic, and conservative scenarios.
All standard investment property metrics calculated from your inputs — in one place.
How to Use This Investment Property ROI Calculator
Enter your property details and income/expense estimates to get a complete picture of investment returns:
- Purchase Price & Down Payment: Investment properties typically require 20-25% down. A larger down payment improves cash flow but reduces leverage.
- Monthly Rent: Use current market rents for comparable units in the area, not your asking price. Check Zillow, Rentometer, or local listings.
- Vacancy Rate: The percentage of time the property sits empty. National average is 5-8%. Use 10% for conservative planning in uncertain markets.
- Property Management: If self-managing, set to 0%. Professional management typically runs 8-12% of collected rent plus leasing fees.
- Maintenance Reserve: Budget 5-10% of purchase price per year for investment properties (more than primary residences, due to tenant wear).
Key Investment Property Metrics Explained
(measures property return, ignores financing)
Cash-on-Cash Return = Annual Cash Flow / Cash Invested × 100
(measures return on your actual cash)
DSCR = NOI / Annual Debt Service
(lender qualification: needs ≥ 1.25x)
GRM = Purchase Price / Annual Gross Rent
(quick screening tool; lower = better value)
Which Metric Matters Most?
Cap rate lets you compare properties regardless of financing. Use it to compare deal quality across markets.
Cash-on-cash return tells you how your cash is actually performing. It's the most relevant metric for leveraged investors and should ideally be 8-12%+.
IRR (Internal Rate of Return) is the most complete metric — it accounts for all cash flows over time, including the eventual sale proceeds, depreciation tax benefits, and rent growth. Most serious investors target 12-15%+ IRR.
The 1% Rule and 50% Rule
Investors use quick rules to screen properties before running full calculations:
Quick Screening Rules
| The 1% Rule | Monthly rent should be ≥ 1% of purchase price. A $300,000 property needs $3,000/month rent. This ensures positive cash flow in most markets. |
| The 50% Rule | Assume 50% of gross rent goes to operating expenses (taxes, insurance, management, maintenance, vacancy). The other 50% covers debt service and cash flow. |
| GRM Rule | Properties trading at GRM below 10-12x are typically better values. Above 15x suggests the rent doesn't support the price. |
These rules are quick screens — not replacements for full analysis. High-cost markets often can't meet the 1% rule but still appreciate well.
Understanding Leverage in Real Estate
Financing amplifies returns when the property performs above the cost of debt. This is called positive leverage:
- If your cap rate (7%) exceeds your interest rate (6.5%), leverage increases your cash-on-cash return above the cap rate.
- If your interest rate (7%) exceeds your cap rate (5.5%), leverage actually reduces your cash-on-cash return — you'd earn more buying all-cash.
- Leverage also amplifies losses: a leveraged property in a declining market can go deeply negative quickly.
The key metric is the spread between cap rate and debt cost. When rates are high and cap rates are compressed, leverage works against you.