The old rule of thumb—buy if you plan to stay five years—is getting crushed by today's numbers.
With mortgage rates hovering near 7% and home prices still stubbornly high in most metros, the break-even horizon has stretched well past a decade in some markets.
Meanwhile, rent increases have cooled in many cities, flipping the math that worked for buyers just three years ago.
A rent vs. buy calculator is only as good as the inputs you feed it, and most people feed it garbage.
They compare a mortgage payment to a rent check and call it a day.
That ignores property taxes, insurance, maintenance, closing costs, and the opportunity cost of a down payment sitting in a savings account earning 4% or more.
On a $400,000 home with 20% down at 7%, you're paying roughly $2,130 monthly for principal and interest alone.
Add taxes, insurance, and a modest maintenance reserve, and you're near $2,900.
If comparable rent is $2,200, you're burning $700 a month in extra cost—money that doesn't build equity the way buyers assume.
Early mortgage payments are mostly interest, so the equity buildup in year one is painfully slow.
The calculator's real job is finding your break-even year: the point where equity gains and appreciation outrun the sunk costs of buying.
In high-price, high-rate markets, that's often year 8 to 12.
In cheaper Midwest and Southern markets with faster rent growth, it can still land around year 4 or 5.
Location isn't a detail—it's the whole answer.
Don't forget the costs nobody advertises.
Closing costs run 2% to 5% of the purchase price.
Selling later means agent commissions, typically 5% to 6%, though new rules have loosened that structure.
Maintenance on a single-family home averages 1% of value annually.
A $400,000 house quietly costs $4,000 a year just to keep standing.
Rents have climbed roughly 20% nationally since 2021, and landlords pass along insurance and tax hikes.
But renting preserves flexibility and keeps your down payment invested.
If that $80,000 down payment earns 4% instead of sitting in drywall, that's $3,200 a year working for you.
Run the calculator with honest numbers: your actual tax bracket, realistic maintenance, how long you'll truly stay, and what your down payment could earn elsewhere.
What happens if rates drop and you refinance?
What if you need to move in three years for a job?
The answer that survives both scenarios is the one worth acting on.
Our take: there's no universal winner here, and anyone selling one is selling something.
Final Thoughts
In today's market, buying often wins on time horizon and stability, while renting wins on flexibility and cash flow.