Run the numbers on any property in seconds. Each calculator opens live inside the Rental Flow app loaded with sample data, no account, no signup, nothing to install.
Measure a property's return independent of financing, using net operating income over purchase price.
See your annual return on the actual cash you put in, after mortgage payments.
Combine cash flow, loan paydown, and appreciation into one total return.
Estimate your monthly principal and interest payment, plus total interest over the life of the loan.
See how many times over a property's income covers its mortgage payment.
See how many months it takes refinance savings to repay the closing costs.
Divide a loan amount by property value to see how much equity is in a deal.
Find out how much rent an assumed vacancy rate costs you per year.
See what share of gross income is consumed by expenses and debt service.
See how a manager's percentage fee changes your annual net cash flow.
See what share of gross income is consumed by operating expenses alone, excluding the mortgage.
Estimate the income a tenant typically needs to qualify for a given rent, using the 3x rule.
Calculate a recommended deposit as a multiple of monthly rent.
Figure out partial-month rent for a tenant moving in or out mid-month.
Calculate a flat or percentage-based late fee for overdue rent.
Compare the true cost of renting against buying over your expected holding period.
Estimate profit and return on a fix-and-flip project from purchase to resale.
Use the 70% rule against after-repair value and rehab cost to find the most you should pay.