Rent vs. buy: when does buying actually win?
"Renting is throwing money away" is the most repeated line in this decision, and it is the wrong frame. A mortgage payment is not all equity: early on most of it is interest, and on top of it sit property tax, insurance, maintenance, and the cost of buying and selling. The honest question is not renting versus a mortgage. It is buying versus renting and investing the difference. Framed that way, buying does not always win, and it does not win immediately. It wins after a crossover year that depends on how long you stay and what homes and markets do.
One scenario, both paths
Take a $400,000 home with 20% down, a 6.5% mortgage, and $2,100 a month in rent nearby. The buyer sinks the down payment and about $12,000 in closing costs into the purchase; the renter invests that same cash instead. Each month, whoever has the smaller housing bill invests the difference at an assumed 6% return. We track wealth on both sides: the buyer's home equity, net of a 6% cost to sell, plus their investments, against the renter's investment balance.
The renter is ahead at first, carrying the invested down payment and dodging the cost of selling. Buying pulls ahead around year 5, as equity builds and rent keeps rising.
Why renting can win, and for years
Two forces favor renting early. The first is transaction cost: you pay to buy and pay again to sell, and in this example that is roughly $12,000 up front plus 6% of the sale price at the end. Move within a few years and you pay both on a small base of equity. The second is opportunity cost: the down payment and closing costs, left invested, compound the whole time. If you put less than 20% down, add private mortgage insurance, an extra monthly charge lenders require until you reach 20% equity, per the Consumer Financial Protection Bureau.
Start with a single payment. In this scenario the buyer pays about $2,555 in the first month, but only $289 of it, the principal, becomes equity they keep. The rest is the cost of borrowing and owning, the same way rent is the cost of renting.
Only the gold slice, the principal, is money you keep. It is thin at the start and grows every month.
Now add it up over time. "Money you don't get back" is not a renting problem, it is a housing problem. The renter's rent is gone, but so is the buyer's interest, tax, insurance, upkeep, and the fees to buy and sell. Compare only those non-recoverable costs, setting aside the equity the buyer keeps, and owning is not obviously the cheaper way to be housed.
Neither line is equity. The owner's equity is tracked separately, in the wealth chart above; this is only the money that leaves for good.
Why buying wins if you stay
Time flips it. Each payment retires a little more principal, and after the early years most of the payment builds equity rather than paying interest, the pattern the amortization schedule describes (Freddie Mac). Meanwhile a fixed mortgage holds your biggest housing cost steady while rent compounds upward every year. Add appreciation on the whole home value, not just your down payment, and the buyer's line bends up and through the renter's. The longer you stay, the more decisively.
Early payments are mostly interest; the equity-building principal only overtakes it partway through the term. Staying long enough to reach that stretch is what makes owning pay.
The tax angle, honestly
Owning can carry a tax benefit, but smaller and rarer than people assume. Mortgage interest and property tax are only worth deducting if together with your other deductions they beat the standard deduction, which most filers simply take (IRS). When itemizing does win, the property-tax portion counts only up to the state-and-local-tax (SALT) cap. Treat any tax saving as a modest tilt, not the reason to buy, and enter your own bracket in the calculator to see whether it changes your answer at all.
The one number that decides it
Nothing moves the crossover more than how long you will really stay, with how fast homes appreciate close behind. Both are guesses, and small changes swing the break-even by years. The chart shows the same scenario at different appreciation rates: faster appreciation pulls the crossover in, slower pushes it out or off the chart entirely.
"none" means buying has not overtaken renting by year 15 in this scenario. The number you cannot control is doing a lot of the deciding, which is why the honest answer stays conditional.
Run your own numbers
The rent vs. buy calculator does this month by month with your price, rent, down payment, and horizon, and shows the year it flips. From there:
- How much house can I afford to set a realistic price first.
- Mortgage amortization to see how equity builds over the term.
- Prepay vs. invest once you own, for the extra-payment question.
How this is sourced
The worked example and every chart are illustrative, computed from the assumptions stated above, not a forecast. The rules they lean on, private mortgage insurance below 20% equity, the way a mortgage amortizes, and the standard-deduction and SALT limits behind the tax point, come from the primary sources below. Your own figures decide your answer.
Sources
Grounded in authoritative primary sources:
This is educational, not personalized financial advice. For your specific situation, talk to a licensed professional.