How to Do a Rental Property Analysis
A step-by-step guide to analyzing any rental property deal. Learn which metrics matter, how to run the numbers, and how to avoid the most common mistakes investors make.
You found a property that looks promising. The neighborhood is solid, the price seems right, and the listing photos aren't terrible. Now what?
Before you make an offer, you need to run the numbers. A proper rental property analysis tells you whether a deal actually makes money — or just looks like it does.
Step 1: Gather the Data
Every analysis starts with three pieces of information:
- Purchase price — the asking price or your offer amount
- Rental income — what the property can realistically rent for (use comps, not the seller's estimate)
- Operating expenses — taxes, insurance, maintenance, vacancy, and property management
This is where most investors waste time. You're bouncing between Zillow, county tax records, and rent comp sites — 15 browser tabs deep before you've even started calculating.
Pacific Rentals Pro pulls all of this automatically from 140M+ properties. Enter an address and the data is there in seconds.
Step 2: Run the Key Metrics
Once you have the data, calculate these five numbers:
Cap Rate
Cap Rate = NOI / Property Value
This tells you the property's return independent of financing. A 6-8% cap rate is the sweet spot for most markets. Learn more about cap rates →
Cash-on-Cash Return
Cash-on-Cash = Annual Cash Flow / Total Cash Invested
This is your actual return on the money you put in — down payment, closing costs, and rehab. A property with a modest cap rate can have excellent cash-on-cash if you use leverage well. Learn more about cash-on-cash →
DSCR (Debt Service Coverage Ratio)
DSCR = NOI / Annual Mortgage Payments
Lenders want this above 1.25. Below 1.0 means the rent doesn't cover the mortgage — you're feeding the property out of pocket.
Net Operating Income (NOI)
NOI = Gross Rent - Operating Expenses
This is your income after all expenses but before mortgage payments. It's the foundation for cap rate and DSCR calculations.
Monthly Cash Flow
Cash Flow = Rental Income - Expenses - Mortgage Payment
The bottom line. Positive cash flow means the property pays for itself. This is the number that determines whether you sleep well at night.
Step 3: Compare LTR vs STR
Don't assume long-term rental is the only option. Run the numbers both ways:
- Long-term rental (LTR): Stable, predictable income. Lower management overhead. Consistent occupancy.
- Short-term rental (STR): Higher revenue potential. More management work. Seasonal fluctuations. Platform fees (Airbnb, VRBO).
A property that barely cash-flows as an LTR might generate 2-3x the revenue as an STR — or vice versa. The only way to know is to run both analyses side by side.
Pacific Rentals Pro includes separate LTR and STR calculators with real market comparables, so you can compare both strategies for any property.
Step 4: Stress-Test Your Assumptions
The numbers look great at 95% occupancy and current interest rates. But what happens when:
- Vacancy hits 15% instead of 5%?
- Interest rates go up 1%?
- You need a $10,000 roof repair in year two?
- Property taxes increase 20%?
Adjust your assumptions and see how the numbers change. A deal that only works with perfect conditions isn't a deal — it's a gamble.
The Most Common Mistakes
1. Using the seller's rent estimate. Always pull your own comps. Sellers overestimate rent. Every time.
2. Forgetting expenses. Vacancy, maintenance reserves (budget 5-10% of rent), property management (8-10%), and capital expenditures are real costs that eat into your returns.
3. Ignoring the 1% rule as a first filter. If monthly rent is less than 1% of the purchase price, the deal needs exceptional circumstances to work. It's not a hard rule, but it saves you from wasting time on deals that won't pencil out.
4. Analyzing one property. The investors who find great deals analyze 20, 30, 50 properties before they make an offer. Speed matters — the faster you can run an analysis, the more deals you can evaluate.
The Bottom Line
A rental property analysis isn't complicated, but it is essential. The difference between a great investment and a money pit is in the numbers — not the gut feeling.
Stop guessing. Run the numbers on every deal before you write an offer.
Analyze any US property for free →
Keep Learning
- Understanding Cap Rates for Investors — how to use cap rate as a screening tool
- How to Calculate Cash on Cash Return — the metric that tells you what your money actually earns
- LTR vs STR: Which Strategy Is Right? — comparing long-term and short-term rental returns