Rent vs buy cost calculator

Enter monthly rent, a combined monthly ownership estimate covering mortgage, property tax, insurance, and maintenance, and the number of years. The result shows both totals, their absolute difference, and which option costs less under those inputs. It deliberately ignores appreciation, sale proceeds, and investment returns so you can inspect the basic housing-cost comparison without hidden market forecasts.

Build comparable monthly estimates

A useful comparison begins with two monthly figures that cover comparable housing needs. For renting, enter the recurring rent payment itself. For buying, combine the mortgage payment, property tax, homeowners insurance, and a realistic maintenance allowance into one monthly ownership cost. If association fees or other unavoidable recurring charges apply to the property, include them in that estimate as well. Keep both amounts in the same currency; the calculator does not convert currencies because only the relationship between the figures matters. Be careful not to compare bare rent with only mortgage principal and interest, since that leaves major ownership expenses out of the decision. Likewise, do not add a refundable rental deposit to every month. The calculator accepts zero as a valid monthly amount, but rejects negative rent or ownership cost because a negative housing payment does not represent the comparison this tool is designed to make. Treat the inputs as a transparent scenario, not as a promise about future bills. If an uncertain cost could materially change the answer, run a low, central, and high estimate to see how stable the conclusion is.

Read the totals and difference

The selected number of years is converted to months, including fractional years, and each monthly amount is multiplied by that duration. The result reports total rent cost, total ownership cost, the absolute cost difference, and ownership cost minus rent cost. That signed field makes the direction explicit: a positive value means ownership costs more, while a negative value means renting costs more. The cheaper option is also named as renting, buying, or equal. Monetary totals are rounded to two decimal places for stable, readable output, while the calculation itself follows the inputs directly. There is no compounding, discount rate, inflation schedule, or changing payment assumption. For example, entering ten years means the same monthly rent and ownership estimate are each applied across 120 months. This simple structure is useful when you want to verify arithmetic or isolate recurring housing expenses. It is not a break-even forecast based on property value. Compare the totals with the exact scenario you entered, and rerun the calculation whenever the time horizon or monthly assumptions change.

Understand what the comparison leaves out

This calculation intentionally ignores home appreciation, depreciation, selling costs, equity recovered at sale, down-payment opportunity cost, tax deductions, rent increases, mortgage balance changes, and investment returns. Those factors can be important in a complete financial decision, but each requires additional assumptions that may obscure the basic cost comparison. Here, buying means paying the estimated ownership cost every month for the selected period, and renting means paying the stated rent every month for the same period. Because mortgage principal may build equity, the ownership total should not automatically be interpreted as money permanently lost. Conversely, maintenance and transaction costs can be irregular even when represented by a monthly allowance. Use the result as a clear baseline for discussion, budgeting, or scenario analysis, then add other financial effects separately if they matter to your decision. Running several horizons can show how the recurring difference scales, but it will not reveal a true investment return without those omitted variables. For automated comparisons, the API costs $0.002 per request and returns the same deterministic fields as the browser calculation. No network data, market forecast, or property valuation is used.