The Right Way to Analyze a Rental Property Before You Buy
The Right Way to Analyze a Rental Property Before You Buy
One of the most common mistakes new investors make is falling in love with a property before they’ve run the numbers. The house looks great, the neighborhood feels right, and before long they’re making an offer based on hope rather than math.
That’s how people end up with rental properties that lose money every month.
Here’s the framework experienced investors use to analyze a rental property before making any decisions.
Step 1: Gross Rental Income
Start with what the property can realistically rent for — not the seller’s optimistic projection, but what comparable properties in the same area are actually renting for right now. Check Zillow, Rentometer, and local property management companies for data.
This is your gross rental income. Everything else flows from this number.
Step 2: Apply a Vacancy Rate
No property is rented 12 months a year, every year, forever. Use a 5–8% vacancy rate for most markets (that’s roughly 3–4 weeks per year) to account for tenant turnover, time between leases, and occasional vacancy.
Step 3: Calculate Operating Expenses
This is where most people underestimate. Operating expenses typically include: property management (8–12% of rent), property taxes, insurance, maintenance and repairs (budget 1% of property value annually), CapEx reserves for big ticket items like roof and HVAC, and any HOA fees.
A common rule of thumb is that operating expenses run 40–50% of gross rent. Higher for older properties, lower for newer ones.
Step 4: Net Operating Income (NOI)
Gross Rent minus Vacancy minus Operating Expenses = Net Operating Income. This is what the property earns before your mortgage payment.
Step 5: Cash Flow After Debt Service
Subtract your monthly mortgage payment from NOI. What’s left is your monthly cash flow. Positive cash flow means the property is paying you. Negative means you’re subsidizing it out of pocket every month.
Step 6: Cash-on-Cash Return
Divide annual cash flow by your total cash invested (down payment plus closing costs plus any immediate repairs). This is your cash-on-cash return — the most honest measure of how hard your money is working.
A target of 6–10% cash-on-cash is realistic in cash-flow-positive markets. Under 4% means the numbers aren’t compelling enough.
The Bottom Line
Good deals are made with math, not emotion. If the numbers work, buy. If they don’t, move on — there will be another property.
At Equity on Repeat, we analyze every property we present to investors using this exact framework. Book a call and we’ll walk you through a real deal together.