About the Rent vs. Buy Calculator
The Rent vs. Buy Calculator settles a question almost every renter eventually asks: am I throwing money away on rent, or would buying actually cost me more? The honest answer is "it depends" — and this tool shows exactly what it depends on. Instead of comparing your rent to a mortgage payment (a common and misleading shortcut), it tallies the full multi-year cost of each path and subtracts the home equity you'd build, so you're comparing apples to apples. Pair it with the Mortgage Calculator and the Home Affordability Calculator once you've decided buying makes sense.
Why Renting Isn't Just "Throwing Money Away"
Buying a home comes with big costs that never build equity either: mortgage interest, property taxes, insurance, maintenance, and thousands in closing costs on both ends of the deal. In the early years, most of your mortgage payment is interest, not principal — so you build equity slowly while paying a premium for the privilege of owning. Renting trades equity for flexibility and a lower, more predictable short-term cost. Whether buying wins comes down to time: the longer you stay, the more the upfront costs get spread out and the more equity you accumulate.
How the Calculation Works
The tool computes the net cost of each path over the years you plan to stay.
Cost of renting is the sum of every rent payment, with rent rising each year by your expected increase:
Total rent = Σ 12 × Rent × (1 + growth)ⁿ⁻¹ for each year n
Net cost of buying adds up what you pay in, then gives you back the equity you'd recover at sale:
Net buy cost = Down payment + Buying costs + All mortgage payments
+ Tax/insurance/upkeep − Equity at sale
Equity at sale = Future home value − Selling costs − Loan balance The monthly mortgage payment uses the standard fixed-rate amortization formula, and the break-even year is the first year the buying path's running total drops below the renting path's.
Worked Example
Say you pay $2,000/month in rent rising 3% a year, and you're weighing a $400,000 home with 20% down at a 6.5% 30-year rate, 2%/yr in tax, insurance and upkeep, 3% annual appreciation, and you'll stay 7 years:
Monthly mortgage ($320,000, 6.5%, 30yr) = $2,022.62
Total rent over 7 years = $183,899
Buying side:
Down payment = $80,000
Buying costs (2% × $400,000) = $8,000
Mortgage paid (84 × $2,022.62) = $169,900
Tax/insurance/upkeep (2% × 400k × 7) = $56,000
− Equity at sale = −$173,101
Net cost to buy = $140,799
Buying is cheaper by ≈ $43,100 (break-even: Year 4)
Here buying pulls ahead in Year 4 and saves roughly $43,000 over seven years — largely because the home gains value and the equity recovered at sale ($173,101) offsets most of what was paid in. Shorten the stay to two or three years, or flatten appreciation to 0%, and renting wins instead. That sensitivity is the whole point.
How the Stay Length Changes the Answer
Using the same example above, here's how the two paths compare depending on how long you stay:
| If You Stay | Cost to Rent | Net Cost to Buy | Winner |
|---|
| 2 years | ~$48,700 | ~$66,300 | Rent |
| 4 years | ~$100,400 | ~$98,100 | Buy |
| 7 years | ~$183,900 | ~$140,800 | Buy |
Tips & Common Mistakes
- Don't just compare rent to the mortgage payment. That ignores taxes, upkeep, closing costs, and the equity you build — the numbers that actually decide it.
- Be honest about how long you'll stay. This is the single biggest driver. If there's a real chance you'll move within a few years, renting usually wins.
- Don't over-assume appreciation. Plugging a hot market's recent double-digit gains into a 10-year projection quietly rigs the result toward buying. A conservative 2–3% is safer.
- Remember the opportunity cost. A down payment invested elsewhere could grow too. If buying wins by only a little, renting and investing the difference may be a genuine tie.
- Budget for the "hidden" owner costs. A new roof, HVAC, or special assessment can erase a slim buying advantage — which is why the upkeep rate matters.
Disclaimer
This tool provides general estimates for informational purposes only and is not financial advice. It uses simplifying assumptions (a 30-year fixed loan, flat percentage costs, and steady appreciation and rent growth) that won't match every real-world situation; actual taxes, insurance, maintenance, home values, and investment returns will vary. Confirm the figures for your own market before deciding, and use the Home Affordability Calculator to check what you can borrow and the Refinance Calculator once you own.
Frequently Asked Questions
How does a rent vs. buy calculator work?It adds up the full multi-year cost of each path. For renting, it totals every rent payment over the years you'll stay, growing rent by your expected annual increase. For buying, it totals your down payment, one-time closing costs, every mortgage payment, and ongoing costs like property tax, insurance, and upkeep — then subtracts the home equity you'd walk away with if you sold (the home's future value minus selling costs and your remaining loan balance). Comparing the two net totals shows which is cheaper and by how much.
What is the break-even year in a rent vs. buy decision?Buying carries a large upfront cost — the down payment and closing costs — so renting is almost always cheaper in the first few years. The break-even year is the point at which buying's cumulative cost finally drops below renting's. If you'll stay past the break-even year, buying tends to win; if you might move before it, renting is usually the cheaper choice. This calculator shows your break-even year directly.
Is it cheaper to rent or buy a house?It depends on how long you'll stay, your local rent-to-price ratio, mortgage rates, and how fast homes appreciate in your area. Buying builds equity and locks in your housing cost, but it only pays off if you stay long enough to recover the upfront and selling costs. Renting is cheaper short-term and keeps you flexible. There's no universal answer — run your own numbers, because the assumptions matter more than any rule of thumb.
Which assumptions change the answer the most?Three inputs flip the result more than any others: how long you'll stay, the home's annual appreciation rate, and how your rent grows. A longer stay, faster appreciation, and quickly rising rents all favor buying. A short stay, flat home values, and cheap, stable rent favor renting. Because these are guesses about the future, try a pessimistic and an optimistic case rather than trusting a single point estimate.
Does this calculator include the opportunity cost of my down payment?Not directly in the headline numbers. The calculator compares out-of-pocket cost minus the equity you build. But the down payment and closing costs you'd tie up in a home could instead be invested. If buying wins by less than what that cash would have earned in the market over the same period, renting and investing the difference may actually come out ahead. Treat a small buying advantage as roughly a tie.
What costs of owning a home are easy to forget?Beyond the mortgage, owners pay property taxes, homeowners insurance, and maintenance — commonly estimated at about 1% to 4% of the home's value every year combined — plus one-time closing costs when buying (around 2% to 5%) and selling costs when leaving (around 6% with an agent). These are exactly the costs that make short stays expensive, which is why this calculator includes them.
How much home value appreciation should I assume?Long-run U.S. home prices have risen roughly 3% to 4% per year on average, but local markets vary widely and returns are never guaranteed. A conservative 2% to 3% is a reasonable default. Avoid plugging in the double-digit gains of a recent hot market as if they'll continue — over-optimistic appreciation is the most common way a rent vs. buy analysis is quietly rigged in favor of buying.
Should I still buy if renting looks cheaper?Sometimes. This tool measures dollars, not everything that matters. Owning gives you a fixed housing payment, freedom to renovate, and stability, while renting gives you flexibility and no exposure to a housing downturn or big repair bills. If the numbers are close, let the non-financial factors — how long you'll stay and how much you value stability versus flexibility — break the tie.