Rental Property Calculator
Evaluate buy-and-hold rental properties. Compute monthly cash flow, cap rate, cash-on-cash return, operating expense ratio, and debt service coverage.
Rental Property ROI & Cash Flow Calculator
Analyze rental investment yields, Cap Rate, cash-on-cash ROI, and multi-year appreciation
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10-Year Equity & Debt Amortization
Real Estate Investment Analysis: Cap Rates, Cash-on-Cash & NOI
Successful real estate investing separates emotional property appeal from rigorous mathematical underwriting. Whether acquiring single-family rentals, duplexes, or commercial multi-family assets, four core financial metrics govern long-term profitability: Net Operating Income (NOI), Capitalization Rate (Cap Rate), Cash-on-Cash Return (CoC), and Debt Service Coverage Ratio (DSCR).
The Financial Anatomy of Net Operating Income (NOI)
Net Operating Income represents the true annual gross earning power of a property before any debt service (mortgage principal and interest) or income taxes are deducted:
NOI = Gross Scheduled Rental Income - Vacancy Loss + Ancillary Income - Operating Expenses
Crucial Rule: Operating expenses include property taxes, landlord hazard insurance, routine maintenance & repairs, professional property management fees (typically 8%-10%), HOA dues, and capital expenditure (CapEx) reserves (roof, HVAC, water heater). Operating expenses NEVER include mortgage payments.
Capitalization Rate vs. Cash-on-Cash Return
Investors frequently conflate Cap Rate with Cash-on-Cash return. Understanding the distinction is vital for capital deployment:
Cap Rate (Asset-Level Unlevered Yield): Evaluates property performance independent of financing: Cap Rate = (Annual NOI / Total Purchase Price) × 100. A property generating $24,000 NOI purchased for $300,000 yields an 8.0% Cap Rate. Higher cap rates generally indicate higher risk or lower-appreciation markets.
Cash-on-Cash Return (Levered Cash Yield): Measures actual cash return on the exact dollars invested out-of-pocket: CoC = (Annual Net Pre-Tax Cash Flow / Total Initial Cash Invested) × 100. Total cash invested includes down payment, closing costs, and upfront rehab renovation capital.
| Metric | Formula | Target Healthy Benchmark | What It Reveals |
|---|---|---|---|
| Cap Rate | NOI / Property Price | 5.0% – 10.0% | Unlevered earning power across local submarket |
| Cash-on-Cash (CoC) | Annual Cash Flow / Cash Invested | 8.0% – 14.0% | Real cash return on out-of-pocket equity |
| Operating Expense Ratio | Operating Expenses / Gross Income | 35% – 50% | Operational efficiency of property upkeep |
| DSCR | NOI / Annual Debt Service | 1.20x – 1.35x+ | Safety margin to service mortgage notes safely |
Step-by-Step Instructions
Enter Property Purchase & Financing
Input purchase price, down payment, loan interest rate, loan term, and closing costs.
Project Rental Income & Vacancy
Enter gross monthly rental revenue, other income (parking, laundry), and expected vacancy rate percentage.
Itemize Operating Expenses
Input property taxes, hazard insurance, HOA dues, property management fees, maintenance reserves, and capital expenditures (CapEx).
Analyze Multi-Year Return Metrics
Evaluate Net Operating Income (NOI), monthly net cash flow, Cap Rate, Cash-on-Cash Return, and Internal Rate of Return (IRR).
Key Features & Capabilities
- Net Operating Income formula: $\text{NOI} = \text{Effective Gross Income} - \text{Operating Expenses}$
- Cash-on-Cash (CoC) Return and Capitalization Rate (Cap Rate) real-time yield modeling
- Comprehensive 30-year multi-scenario cash flow projection with annual rent appreciation and expense inflation
- Tax shield modeling calculating annual 27.5-year straight-line depreciation deductions
Frequently Asked Questions
What is the difference between Effective Gross Income and Net Operating Income (NOI)?
Effective Gross Income (EGI) is the total potential rental revenue plus miscellaneous income minus estimated vacancy losses: EGI = Gross Scheduled Rent - Vacancy + Other Income. Net Operating Income (NOI) subtracts all operating expenses (property taxes, insurance, management, maintenance) from EGI: NOI = EGI - Operating Expenses (excluding mortgage debt service).
What is Capital Expenditure (CapEx) in rental property investing?
CapEx refers to major long-term structural replacements that extend the useful life of the property (such as replacing a roof, HVAC system, water heater, or driveway). Unlike routine maintenance and repairs, CapEx involves high-cost, irregular expenditures that must be funded from a designated monthly reserve fund (typically 5%–10% of monthly rent).
How do you calculate Cash-on-Cash return on a mortgaged rental property?
Cash-on-Cash Return is calculated as: CoC = (Annual Net Cash Flow / Total Cash Invested) × 100. Annual Net Cash Flow is NOI minus annual mortgage principal and interest payments. Total Cash Invested includes the down payment, closing costs, and initial repair/renovation outlays.
What is the IRS rule for residential rental property depreciation?
The IRS allows residential rental property owners to depreciate the structural value of the building (excluding land value) over a 27.5-year recovery period using straight-line depreciation (approximately 3.636% per year). When the property is sold, previously claimed depreciation is subject to a 25% depreciation recapture tax rate unless deferred via a Section 1031 exchange.
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