Money guide
Rent vs buy: when the spreadsheet quietly lies
Someone always says renting is ‘throwing money away.’ That line skips property tax, insurance, repairs, closing costs, and the cash you lock into a down payment. Buying can be the right call—I have recommended it for friends who planned to stay put—but the honest comparison is messier than a mortgage payment versus last month’s rent. This is how I walk through it when someone asks for a straight answer.
Updated 2026-09-05
Match the time horizon first
If you might move cities in two or three years, buying often loses on transaction costs alone. Closing fees, realtor commissions, and the hassle of selling can erase early principal paydown. A five-to-seven-year stay starts to make the math more competitive in many markets; longer stays generally favor ownership if you can afford the house without stretching every paycheck.
The calculator needs your real horizon. Optimism (‘we’ll stay forever’) is fine as a values statement. It is a bad input if your industry relocates people every few years.
Total housing cost beats ‘the payment’
Your mortgage payment is principal and interest—sometimes escrowed taxes and insurance. Ownership also means maintenance (roofs do not care about your budget), HOA dues, higher utilities in larger spaces, and the occasional special assessment. Renters pay some of those indirectly through rent, but the surprise bills land on owners.
On the rent side, include renter’s insurance and expected rent increases. A lease that looks cheaper in year one can catch up if local rents rise faster than your fixed mortgage rate.
Opportunity cost of the down payment
Twenty percent down is not free just because it becomes home equity. That cash could have sat in a boring index fund. A fair rent-vs-buy model asks what that money might have earned elsewhere, then credits the buyer with equity buildup and any appreciation you are willing to assume cautiously.
I treat aggressive appreciation assumptions the same way I treat aggressive stock returns: interesting for a sensitivity case, dangerous as the only case.
Lifestyle is allowed to matter—just name it
Wanting a yard, a workshop, or the freedom to paint walls is legitimate. So is wanting mobility and a landlord who fixes the water heater at 11 p.m. Put those preferences next to the spreadsheet instead of pretending the spreadsheet includes them. The tool answers ‘which path looks cheaper under these assumptions.’ You still decide what you are optimizing for.
Key takeaways
- Short time horizons often favor renting once transaction costs are honest.
- Compare total ownership costs, not payment vs rent alone.
- Count the opportunity cost of the down payment.
- Let lifestyle preferences be explicit—not smuggled into fake appreciation rates.