What the rent vs. buy calculator tells you
A rent-vs-buy calculator compares the total financial cost of owning a home against renting one over a set period, so you can see which leaves you wealthier when you walk away. It’s not just monthly payment vs. rent — it accounts for the equity you build, the home’s appreciation, and the money you could have earned investing your down payment.
On the buying side, the tool totals every dollar out the door — down payment, principal, interest, property tax, insurance, HOA, and maintenance — then subtracts the equity you keep after appreciation and selling costs. On the renting side, it totals rent (grown each year) and subtracts the investment return you’d earn by investing the down payment instead.
Whichever path has the lower net cost over your holding period wins. The longer you stay, the more buying tends to pull ahead — including in a market like Miami where off-market deals can be bought below retail.
How it works
- Set a holding period (in years), then grow rent, home value, and costs forward across it.
- Buying outflows = down payment + every monthly cost (P&I + property tax + insurance + HOA + maintenance) summed over the period.
- Equity at sale = projected home value (after appreciation) − remaining loan balance − selling costs. Net cost of buying = total outflows − equity at sale.
- Renting outflows = total rent paid, growing each year. Opportunity gain = the down payment invested at your expected return over the same period.
- Net cost of renting = total rent − investment gain. The lower net cost is the cheaper option, and the year they cross is your break-even point.
Frequently asked questions
Is it better to rent or buy a home?
It depends mostly on how long you’ll stay and on local prices, rents, and appreciation. Buying carries large up-front costs (down payment and closing costs), so it usually wins only after you hold the home long enough to recover them through equity and appreciation. This calculator finds that point for your numbers.
How many years until buying beats renting?
The break-even is often somewhere around five to seven years, but it varies widely with price, rent, rate, and how fast values rise. A high price relative to rent pushes break-even later; strong appreciation pulls it earlier. The tool shows the exact crossover year for your inputs.
Does home appreciation make buying worth it?
Appreciation is a major reason buying can pay off, because gains apply to the home’s full value, not just your down payment. On a $750,000 home, even modest 3% annual growth adds about $22,500 of value in year one. But appreciation isn’t guaranteed, so the calculator also reflects selling costs and maintenance.
What is the opportunity cost of a down payment?
It’s the return you give up by tying cash into a home instead of investing it elsewhere. If you put $150,000 down rather than investing it at, say, 6% a year, that forgone growth is a real cost of buying — which is why a fair comparison credits the renter with that investment gain.
Should I buy in Miami or keep renting?
If you expect to stay several years, buying often comes out ahead once equity and appreciation outweigh the up-front costs — especially when you can purchase an off-market home below retail. If your plans are uncertain or short-term, renting’s flexibility and lower entry cost may win. Run your own numbers to be sure.
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