Rental Property Calculator
Run the full numbers on a financed NYC rental purchase: monthly cash flow, cap rate, and cash-on-cash return. Unlike our unlevered Cap Rate Calculator, this tool factors in your actual mortgage payment to show what you’ll really pocket (or pay out of pocket) each month.
See all our calculators for the rest of the NYC buying and selling picture.
Glossary
Cash flow is the actual dollars left over each month after every expense, including your mortgage. Cap rate ignores financing entirely (NOI over acquisition cost). Cash-on-cash return divides your annual cash flow by the actual cash you put in — it’s the metric that reflects your specific financing, down payment, and leverage.
Cap rate never sees your mortgage payment. A property can have a perfectly respectable cap rate and still bleed cash every month if the mortgage payment exceeds NOI — common in high-price, low-cap-rate NYC deals financed with a large loan. That’s “negative leverage.”
Your down payment (purchase price minus loan amount) plus closing costs and any renovation spend before the unit is rent-ready. It’s the total cash you actually wired, which is the denominator cash-on-cash return is measuring against.
Yes. Property taxes and insurance are already counted separately in operating expenses above, so this calculator’s mortgage line is P&I only — adding a full PITI payment on top would double-count taxes and insurance.