Why the break-even horizon matters most
The single biggest factor in rent-versus-buy is how long you will stay. Buying carries large one-time costs — 2–5% to purchase and 6–8% to sell — that must be recovered through appreciation and equity buildup before ownership pays off. In most markets that break-even point arrives somewhere between four and seven years. Buy and sell inside that window and the transaction costs can wipe out any advantage of owning.
Renting, by contrast, has almost no exit cost, which is precisely its value when your future is uncertain. If a job change, relocation, or life event might move you within a few years, the flexibility of renting often outweighs the equity you would have built. The longer and more certain your stay, the more the scales tip toward buying.
The opportunity cost hiding in your down payment
Buying ties up a large down payment that could otherwise be invested. A $70,000 down payment growing at 7% in a diversified portfolio becomes roughly $138,000 in ten years. A complete comparison counts that foregone growth as a real cost of buying — and counts the equity and appreciation you would miss as a real cost of renting. This calculator weighs both sides rather than assuming ownership always wins.
A useful market signal is the price-to-rent ratio: median home price divided by annual rent for a comparable home. Below 15 strongly favors buying, above 20 tilts toward renting and investing the difference, and 15–20 is roughly neutral. Combine that signal with your personal time horizon and the non-financial factors — stability, control, and flexibility — that numbers alone cannot capture.