Rental Deal Quick Analyzer

Screen any rental deal in 60 seconds. Enter your best estimates for price, rent, and expenses to get monthly cash flow, cap rate, cash-on-cash return, the 1% and 50% rules, and a plain-English verdict. This is an estimate for screening purposes only — not financial advice.

The deal

Enter 0 if there's no HOA.
A common rule of thumb is 1% of the property value per year.
5% = about 18 days vacant per year.

How to read the results

  • Cash flow is what's left in your pocket each month after every expense, including the mortgage and reserves. Negative means you're paying to own the property.
  • Cap rate measures the property's yield before financing — useful for comparing deals in the same market. Higher is better; the "good" number varies by market.
  • Cash-on-cash return is your annual profit divided by the cash you put in. Many investors target 8% or better.
  • The 1% rule: monthly rent should be at least 1% of the purchase price. Quick screening, not a law.
  • The 50% rule: over time, operating expenses (taxes, insurance, maintenance, vacancy — everything except the mortgage) run about 50% of gross rent. If your estimate is well above that, you're being honest; well below, you may be underestimating.

Don’t guess the rent or the price.

RentCast gives rent estimates, property valuations, and comparable listings, so the rent and purchase price you type into the analyzer are based on market data, not hunches.

Visit RentCast

Affiliate link — we may earn a commission at no extra cost to you.