The Deal Looks Perfect — Until You Run the Real Numbers
The listing says "great investment opportunity." Your agent says it'll cash flow. Zillow shows rising values in the area.
But Zillow doesn't show you the real property tax bill ($4,800/year, not the $2,100 the seller quotes). Or that insurance in that zip code costs 40% above the national average. Or that market rents are $1,400 — not the $1,800 the pro forma claims.
One wrong assumption turns a cash-flowing deal into a cash pit. PIE's rental property calculator runs every number using real data — not guesses — so you know exactly what you're buying.
Analyze any US property for cap rate, cash flow, and ROI in 30 seconds.
Analyze your first deal free Free preview · No signup · Any US addressWhat the Rental Property Calculator Shows
Real Numbers, Not Zillow Estimates
PIE doesn't ask you to type in expenses and hope. It pulls real data for the specific property:
- Enter any US address. PIE identifies the property, its tax assessment, and the local market.
- Real expenses. Actual property tax rate (from county assessor data), insurance cost (by zip code), and market rent (from MLS + rental platforms).
- See every metric. Cap rate, cash-on-cash return, monthly cash flow, and 5-year total ROI — computed in 30 seconds.
→ Read our financial metrics guide to understand what each metric means and what to target.
"The pro forma showed $400/month cash flow. PIE's calculator showed negative $50 — because the real tax bill was double what the seller's agent quoted. Saved me from a bad deal on day one."
→ Compare rental properties against other strategies in our investing strategies comparison.
→ Learn the 15-minute deal analysis framework professionals use.