What is the formula for calculating rental property Cap Rate?

Capitalization Rate (Cap Rate) equals Net Operating Income (NOI) divided by the Purchase Price: Cap Rate = Annual NOI / Purchase Price. It represents the unleveraged rate of return on the property before factoring in mortgage financing.

How do you calculate Cash-on-Cash Return?

Cash-on-Cash Return equals Annual Pre-Tax Cash Flow divided by Total Cash Invested: Cash-on-Cash Return = Annual Net Cash Flow / (Down Payment + Closing Costs + Initial Repairs). It measures the actual cash yield on the out-of-pocket cash deployed.

What is the 1% Rule in real estate investing?

The 1% Rule is a rapid deal screening guideline suggesting that gross monthly rental income should equal at least 1% of the total acquisition price. For example, a $300,000 property should produce approximately $3,000 in monthly rent to reliably generate positive net cash flow after operating expenses and mortgage payments.

What operating expenses should be factored into a rental property evaluation?

Operating expenses include property taxes, homeowner insurance, vacancy reserves (typically 5% to 8%), repairs and ongoing maintenance (5% to 10%), capital expenditure (CapEx) reserves for long-term replacements, property management fees (8% to 12%), and any HOA dues or utility costs paid by the owner.

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Real Estate Evaluation Tool

Stop guessing on investment properties. Analyze rental deals on-page with live cash flow, cap rate, and cash-on-cash ROI calculations, or download our full multi-property spreadsheet.

🏠 Property & Financing Assumptions

Enter the purchase, loan terms, and operating expenses.

Monthly Net Cash Flow Positive Cash Flow

$0 / mo

Annual Cash Flow: $0

Cash-on-Cash ROI:

0.0%

Cap Rate (NOI / Price):

0.0%

1% Rule Test 0.80% (Passable)

Gross Rent Multiplier

10.2x

Monthly Inflows & Outflows

Total Monthly Revenue: $0

Mortgage Payment (P&I): $0

Monthly Operating Expenses: $0

Total Initial Cash Invested: $0

Annual Net Operating Income (NOI): $0

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How to Evaluate a Rental Property Deal: Core Metrics Explained

Successful real estate investors don’t buy properties based on emotion or unverified appreciation assumptions. They evaluate deals using standardized cash flow and return metrics.

💵 Cash-on-Cash Return (CoC)

Measures annual net cash flow divided by total initial cash out of pocket (down payment + closing + rehab). 8%–12%+ is a common target for residential rentals.

🏢 Capitalization Rate (Cap Rate)

Measures Net Operating Income (NOI) divided by Purchase Price, ignoring financing. Represents unleveraged yield to compare deals across markets.

📏 The 1% Rule

A quick deal screening benchmark: monthly gross rent should equal approximately 1% of the total purchase price (e.g., $3,000/mo rent on a $300k home).

📊 Gross Rent Multiplier (GRM)

Calculated as Purchase Price ÷ Annual Gross Rent. It estimates how many years of rent equal the purchase price. Lower GRM (typically 6x–10x) signals better value.

The 50% Rule for Operating Expenses

As a rough rule of thumb, experienced investors estimate that approximately 40% to 50% of gross rental income will go toward operating expenses (property taxes, insurance, vacancy, maintenance, and property management) before debt service.

Always build in realistic reserves for capital expenditures (roof, HVAC, water heater replacements) and property management fees, even if you plan to self-manage initially.