Financing & decisions

Rent vs. Buy: When the Math Actually Favors Renting

SFRCalc Editorial

"Renting is throwing money away" is one of the most repeated lines in personal finance, and it's wrong often enough to be worth unpacking. Buying builds equity, but it also ties up a large amount of cash in a down payment and closing costs — cash that, left invested elsewhere, would also be growing. Whether buying wins depends on the relationship between four things: how much the home appreciates, what the money not spent on a down payment could earn invested instead, how fast rent grows, and how long you stay.

The comparison that's actually being made

A fair rent-vs-buy comparison isn't "monthly rent vs. monthly mortgage payment" — it's buyer's net worth (home equity, after selling costs) against renter's net worth (the down payment and closing costs invested on day one, growing over time, plus whatever the renter invests each month that buying would have cost more). Renting isn't "throwing money away" if the cash that would've gone into a down payment is actually invested instead — it's just a different asset allocation.

What each side is really tracking

Buyer	Home value − remaining loan − selling costs
Renter	Invested down payment + closing costs, compounding, adjusted by whichever side costs more each year

The breakeven year

Because buying has large upfront transaction costs (closing costs going in, selling costs coming out), it typically takes several years before the buyer's position overtakes the renter's — this is the "breakeven year." Sell or refinance before that point, and renting would have left you ahead on pure net worth, even though you'd have no home to show for it. This is why the standard advice to not buy if you expect to move within a couple of years is really a breakeven-year argument in disguise.

What actually moves the breakeven year

Home appreciation vs. investment return. If the stock market (or whatever the renter's alternative investment is) outperforms home appreciation, the renter's side compounds faster, pushing the breakeven year later or removing it within any reasonable horizon.
Rent growth. Faster rent growth closes the gap over time, since it raises what the renter is paying (and therefore not investing) each year.
Down payment size. A larger down payment means more capital locked into the home instead of invested — it can still be the right call, but it changes the comparison; a cash purchase is the extreme version of this.
How long you actually stay. Transaction costs are fixed regardless of hold length, so they matter far more over three years than over fifteen.

There is no fixed number of years that makes buying "correct." It depends entirely on the appreciation, investment return, and rent growth assumptions you plug in — which is exactly why this is worth modeling on real numbers instead of a rule of thumb.

What this doesn't capture

This is a pure net-worth comparison — it doesn't weigh the non-financial sides of the decision: the stability of a fixed housing payment, the freedom to relocate that renting preserves, or the ability to renovate a home you own. Those are real considerations that a spreadsheet can't price for you, and a financially "correct" answer on paper doesn't have to be the right personal decision.

Plug in your own appreciation, rent growth, and investment return assumptions with the Rent vs. Buy calculator to see your own breakeven year.

This article is for general education and isn't financial or investment advice. Long-run appreciation and investment return are uncertain and vary by market — treat any projection as directional, not a guarantee.