For the first time in years, the math on rent versus buy has flipped in favor of renters across a striking share of American cities — and a free online calculator is letting people run their own numbers in about two minutes.
The tool, from personal finance site NerdWallet, compares the real, total cost of owning a home against renting and investing the difference, instead of relying on the old rule of thumb that buying always wins if you stay put for five years.
The headline finding: with mortgage rates hovering near 7% and home prices still elevated, renting and investing the savings comes out ahead in many large metros, especially for anyone planning to move within a decade. **Why the old advice keeps failing** The standard "5% rule" many buyers use ignores the biggest costs of ownership: property taxes, insurance, maintenance, HOA dues, and the opportunity cost of a down payment that could be earning returns elsewhere.
A typical homeowner spends 1% to 2% of the home's value on maintenance every year, according to housing researchers.
On a $400,000 house, that's $4,000 to $8,000 annually — money renters never see on a bill.
At 7%, a $320,000 mortgage costs roughly $22,000 in interest in the first year alone, most of which builds no equity. **What the numbers actually show** Homeowners do build equity and benefit from price appreciation over long stretches.
In markets with strong job growth and limited housing supply, buying still wins for people who stay 10 years or more.
The calculator's real value is that it forces you to enter your own rent, home price, down payment, rate, and time horizon — the variables that decide the answer.
The break-even point is usually somewhere between 7 and 12 years in today's market, longer than the 3 to 5 years many buyers assume. **The trap most buyers fall into** The calculator's most useful output isn't a single "rent" or "buy" verdict.
If you might change jobs, move for family, or relocate for a partner within that window, the transaction costs alone — realtor commissions, closing fees, moving expenses — can wipe out any gains.
Renters also aren't locked into a single neighborhood.
That flexibility has real dollar value in a job market where remote work can shift every couple of years. **Run it before you tour** Plugging your actual numbers into one of these calculators takes less time than a single open house.
It won't tell you what to do, but it will show you what you're betting on.
Check your credit score, get a real rate quote from a lender, and compare it against what you pay in rent today.
If your break-even is 10 years and you're not sure you'll stay five, the answer may already be on the screen. **Our take** Rent versus buy was never a moral question, and treating it like one has cost a lot of Americans a lot of money.
The calculator doesn't settle the debate — it just hands you the arithmetic your realtor probably won't.
Final Thoughts
Run your own numbers before someone else runs them for you.