A bounded planning comparison
The calculator uses only the values you enter. Buying starts with the down payment and upfront costs, converts the entered nominal annual rate compounded semi-annually to an equivalent monthly rate, and assumes that one entered fixed rate remains unchanged through the full selected amortization period. It does not model a mortgage contract term, renewals, or rate changes. It adds annual ownership costs, projects home value, subtracts the remaining loan and user-entered selling costs, and reports ending equity. Renting adds rent and other renter costs and invests the buying scenario’s initial cash plus each positive or negative monthly cash-flow difference.