Every few months, someone forwards a rent-versus-buy calculator to a group chat, and everyone types in their numbers expecting a verdict.
The result is usually less dramatic than the argument that prompted it.
Run the math honestly, and the gap between renting and owning is often smaller than either side wants to admit.
The reason is that these tools are only as good as the inputs, and most people fudge at least one.
They plug in a mortgage rate from a headline, forget property taxes and insurance, and leave out maintenance, which runs roughly 1% to 2% of a home's value per year.
On a $400,000 house, that's $4,000 to $8,000 annually, and it doesn't care whether you feel like spending it.
Closing costs on a purchase typically run 2% to 5% of the loan amount, and selling costs usually land around 6% to 8% of the sale price.
Break-even horizons commonly stretch five to seven years, sometimes longer in expensive markets.
Move sooner than that, and renting often wins by default, even if the monthly payment looked lower.
There's also the opportunity cost nobody types into the box.
A down payment parked in a savings account or index fund earns something.
A down payment sunk into a house earns nothing on paper until you sell.
Calculators that ignore this tend to flatter buying; the better ones, including several free versions from major lenders and consumer finance sites, let you set an investment return assumption.
Then there's the rent side, which people underestimate in the other direction.
Rent goes up, sometimes sharply, and a landlord can decide not to renew.
Owning buys you a fixed principal-and-interest payment, but taxes, insurance, and repairs drift upward too.
A few practical moves if you're actually deciding this year: pull your real numbers from your last tax return and bank statements, not from memory.
Get a mortgage rate quote specific to your credit score rather than using the national average.
Call your county assessor's office for the actual property tax rate on a specific address.
And check what comparable rentals actually list for today, not what you paid three years ago.
The honest answer most calculators deliver is that the difference comes down to your time horizon, your local market, and how much you value not getting a repair bill on a Sunday.
They're life problems wearing a spreadsheet costume.
My take: use the calculator, but treat it as a conversation starter rather than a verdict.
The number it spits out is a snapshot of assumptions you chose, and you can change most of them.
Final Thoughts
If the result is close, the deciding factor is probably how long you plan to stay put, not which option is cheaper on paper.