What is the 1% rule in rental property analysis?

The 1% rule states that monthly rent should be at least 1% of the purchase price. A $150,000 property should rent for $1,500+/month. It is a quick screening tool, not a guarantee of profitability.

Should I analyze cash flow or appreciation?

Analyze both, but prioritize cash flow. Appreciation is speculative; cash flow is measurable and keeps you solvent during market downturns. Positive cash flow gives you time to wait for appreciation.

How do I estimate vacancy rates?

Use local market data (5–10% is typical for residential). Class A properties may see lower vacancy; Class C may see higher. Verify with property managers in your target sub-market.

What operating expenses should I include?

Property taxes, insurance, maintenance, property management, vacancy reserve, utilities (if owner-paid), HOA fees, landscaping, and capex reserve. Do not include mortgage principal or interest—that is financing, not operating expense.

Rental property analysis

OffMarket Deck · Updated 2026-05-07

Rental property analysis is the process of evaluating a property's income potential, operating expenses, financing structure, and long-term viability as a buy-and-hold investment. It combines cash flow projections, cap rate calculations, cash-on-cash returns, and market trend analysis to determine whether a property deserves acquisition capital.

Rental property analysis separates amateur landlords from professional investors. It is not enough to buy a house and hope it rents—the numbers must work under conservative assumptions, including vacancy, maintenance surprises, and market softness.

Key takeaway

Analyze the deal, not the house. A beautiful property with terrible numbers is a liability. A plain property with strong cash flow and conservative assumptions is an asset.

Projecting rental income

Market rent: Check comps on rental listing sites and property manager opinions
Other income: Laundry, parking, storage, pet fees
Vacancy allowance: Typically 5–10% of gross income
Effective gross income: Gross potential income minus vacancy

Operating expenses

Property taxes: Based on assessed value and local rates
Insurance: Landlord policy (higher than owner-occupant)
Maintenance: 5–10% of gross rent annually
Property management: 8–12% of collected rent
Utilities: Only if owner-paid (common in multifamily)
HOA fees: If applicable
Capex reserve: 5–10% for roof, HVAC, appliances, flooring

Key analysis metrics

Net Operating Income (NOI): Effective gross income minus operating expenses (before debt service). This feeds into cap rate calculations.

Cash Flow: NOI minus debt service (principal + interest). Positive cash flow means the property pays you monthly; negative means you subsidize it.

Cash-on-Cash Return: Annual cash flow divided by total cash invested. See cash-on-cash guide for details.

Cap Rate: NOI divided by property value. See cap rate guide.

Screening rental deals on OffMarket Deck

Filter by buy-and-hold strategy, then cross-check listed prices against local rent comps. Use the rental calculator to model cash flow with your financing assumptions before requesting a showing.

Frequently asked questions

: The 1% rule states that monthly rent should be at least 1% of the purchase price. A $150,000 property should rent for $1,500+/month. It is a quick screening tool, not a guarantee of profitability.