Why Deal Analysis Matters
Most beginner investors spend weeks agonizing over a single property — only to lose it to a faster buyer or discover the numbers don't work. Learning to analyze deals quickly and accurately is a core investing skill that separates successful investors from those who never pull the trigger.
The 1% Rule (Quick Filter)
The 1% rule is a rough screening tool: a property's monthly rent should equal at least 1% of its purchase price. A $300,000 property should rent for at least $3,000/month to pass this filter.
In most California markets, properties rarely hit 1%. That doesn't mean you should rule them out — it just means you need to be more precise with your full analysis and factor in appreciation potential.
Key Metrics to Calculate
Gross Rent Multiplier (GRM)
GRM = Purchase Price ÷ Annual Gross Rent. A lower GRM indicates better value. Compare GRM across similar properties in the same market.
Net Operating Income (NOI)
NOI = Gross Rental Income – Operating Expenses (taxes, insurance, maintenance, property management, vacancy). This tells you how much income the property generates before debt service.
Cap Rate
Cap Rate = NOI ÷ Purchase Price. Cap rates vary by market and property type. In California, 4–6% is typical for well-located properties. Higher cap rates suggest more return — but often more risk.
Cash-on-Cash Return
Cash-on-Cash = Annual Cash Flow ÷ Total Cash Invested. This is the most relevant metric if you're using leverage. A 6–10% cash-on-cash return is generally considered solid for a single-family or small multifamily rental.
A Simple 10-Minute Workflow
- Pull the listing price and estimated rents (use Rentometer, Zillow, or call a local property manager).
- Apply the 1% rule as a first filter.
- Estimate operating expenses at 40–50% of gross rent (the "50% rule" is a common shorthand).
- Subtract your mortgage payment from estimated NOI to get monthly cash flow.
- Divide annual cash flow by your cash invested for cash-on-cash return.
Don't Skip the Due Diligence
The 10-minute analysis is just a filter. Before making an offer, verify actual rental comps, get an inspection, review local rent control ordinances, and confirm insurance and tax costs.
The best investors analyze dozens of deals for every one they buy. Speed and accuracy in that screening process is what gives you a competitive edge.
