Rent vs Buy Calculator: The Complete Guide to Making the Right Decision
The rent vs buy decision is one of the most consequential financial choices most people face — and it's rarely as simple as "buying is always better." The right answer depends on your local market, how long you'll stay, what returns you could earn by investing elsewhere, and dozens of other factors. This calculator models all of them simultaneously.
The True Cost of Buying a Home
Most people compare only mortgage payment vs rent — a misleading shortcut. True buying costs include: closing costs (typically 2–5% of price, paid upfront), property taxes (0.5–2.5% annually depending on location), maintenance (budget 1–2% of home value per year), homeowner's insurance, PMI if under 20% down, and the opportunity cost of the down payment (what that money could have earned invested in the stock market). When these are all included, the monthly effective cost of homeownership is often 40–60% more than the mortgage P&I alone.
The Price-to-Rent Ratio: A Quick Sanity Check
The price-to-rent ratio = home price ÷ annual rent for an equivalent property. A ratio below 15 strongly favors buying. 15–20 is neutral. Above 20 suggests renting may be more economical. San Francisco: ~30 (strongly rent). Austin TX: ~18 (moderate). Detroit: ~10 (strongly buy). This ratio is a quick first screen, but the full calculation in this tool provides much more nuance.
The Break-Even Point: How Long Must You Stay?
The break-even point is the year when the cumulative financial advantage of buying exceeds the cumulative advantage of renting. It accounts for closing costs, mortgage interest front-loading, growing equity, and the compounding returns renters could earn on invested savings. In a typical US market: break-even = 5–7 years. In expensive coastal cities: 8–12 years. In affordable Midwest markets: 3–5 years. If you plan to move before the break-even point, renting is almost certainly the better financial choice.