Rent vs Buy Calculator: Which Option Costs Less Over 5, 10, or 20 Years?
A rent vs buy calculator only earns its keep when it compares the two things that actually differ: renting for $2,000 a month while investing the $92,000 you didn't sink into a house, versus buying a $400,000 home and building equity. Frame it as "rent versus mortgage" and buying always looks like the obvious winner. Frame it honestly — equity plus appreciation on one side, an invested down payment plus monthly savings on the other — and the answer swings on a single number: how long you stay.
It's Not the Monthly Payment — It's the Break-Even Year
Most people compare rent to a mortgage payment and stop there. That comparison is nearly useless. A mortgage payment isn't a cost the way rent is — part of it pays down your loan and comes back to you as equity. And rent isn't pure waste either: property tax, homeowner's insurance, maintenance, and mortgage interest build no equity, and an owner pays all four.
The number that decides it is the break-even year— the point where buying's total net worth (home equity minus selling costs, plus any money you invested along the way) overtakes renting's net worth (the invested down payment plus monthly savings). Before that year, selling means you lose money versus having rented. After it, every additional year tilts harder toward owning. For a typical 2026 purchase, that crossover often lands closer to year 10 than the old five-year rule of thumb suggests — precisely because most quick calculators skip the next section.
The Down Payment You Didn't Invest
Here's the line item cheap calculators skip, and it's the whole game: opportunity cost. When you put $80,000 down and pay $12,000 in closing costs, that $92,000 is gone from your investment accounts. A renter keeps it. Invested at 5% a year, $92,000 grows to about $150,000 in ten years and $244,000 in twenty. That growth is the renter's equivalent of your appreciation — and it's exactly why renting isn't "throwing money away."
The calculator above bakes this in. It assumes the renter invests your upfront cash, plus any month the full cost of owning runs higher than rent. That's the apples-to-apples version: same money, two paths. Leave opportunity cost out and you overstate buying by tens of thousands of dollars — the single most common mistake in a rent-versus-buy decision. If you're still deciding what you can even afford to put down, run the numbers first in our down payment calculator.
The 5% Rule: What You Burn Either Way
There's a fast mental model that cuts through the noise, popularized by finance writer Ben Felix: compare the unrecoverable costsof each path. For a renter, that's simple — 100% of rent is unrecoverable. For an owner, the unrecoverable costs run to roughly 5% of the home's value per year: about 1% in property tax, 1% in maintenance, and 3% as the cost of the money tied up (mortgage interest plus the return your down payment isn't earning).
Run it on a $400,000 home. Five percent is $20,000 a year, or about $1,667 a month, that you never get back — no equity, no return, gone. If comparable rent is below $1,667, renting is cheaper on the money you burn. If rent is above it, owning wins the burn test. It's a back-of-the-envelope screen, not a verdict, but it reframes the question correctly: you're not comparing rent to a mortgage, you're comparing two piles of money you'll never see again.
Rent $2,000 vs Buy $400,000, Line by Line
Let's walk a real one. You can rent a comparable place for $2,000 a month, or buy a $400,000 home with 20% down ($80,000) at 6.75% on a 30-year loan. Property tax is 1.1%, insurance $1,800 a year, maintenance 1%, closing costs 3%, and you assume 4% appreciation, 5% investment returns, and a 7% cost to sell. Here's how the two paths stand at three horizons:
| If you sell after | Renter net worth | Buyer net worth | Advantage |
|---|---|---|---|
| 3 years | $142,000 | $109,000 | Rent +$32,000 |
| 10 years | $274,000 | $278,000 | Buy +$4,000 |
| 20 years | $512,000 | $634,000 | Buy +$122,000 |
At three years, buying is a clear loser — you paid $12,000 to get in and would hand over roughly $30,000 to sell, and the home hasn't appreciated enough to cover it, so renting comes out about $32,000 ahead. Around year ten, appreciation and loan paydown finally erase the transaction drag and buying pulls even. By year twenty it isn't close: owning has built about $122,000 more. Notice the pattern — the longer you hold, the wider owning's lead grows, because appreciation compounds on the full home value while your loan balance keeps shrinking. To size the exact payment behind this scenario, run it through our mortgage calculator.
Why Buying Starts You $40,000 Behind
Buying isn't a one-time trade; it's two expensive transactions with a gap in the middle. On that $400,000 home you pay around $12,000 in closing costs going in — lender fees, title, escrow, taxes — and roughly $28,000 to $32,000 coming out, once you count a 5-6% agent commission and transfer taxes on a home that's appreciated. That's about $40,000 in friction the renter simply never pays.
This is why short holds lose. Appreciation has to climb the home's value by roughly 8-13% before you've merely covered the cost of buying and selling — and that's before you've made a dollar. At 4% a year, clearing a 10% hurdle takes roughly two to three years of appreciation just to break even on transaction costs alone. Buy a home you'll leave in two or three years and you're very likely paying $40,000 for the privilege of a temporary address.
Price-to-Rent Ratio: A 10-Second Gut Check
Before you model anything, screen the market with the price-to-rent ratio: the home price divided by a full year of rent for a comparable place. A $400,000 home against $2,000 rent ($24,000 a year) gives a ratio of 16.7. Here's how to read it:
| Price-to-rent ratio | What it signals | Typical example |
|---|---|---|
| Under 15 | Buying usually favored | Much of the Midwest & South |
| 15 to 21 | Toss-up — run the full numbers | Many suburban metros |
| Over 21 | Renting usually favored | Coastal cities, hot markets |
A ratio over 21 means the home is priced so high relative to rent that you'd need years of strong appreciation to justify buying — the math the U.S. Census Bureau's housing vacancy and homeownership data shows plays out in the priciest coastal metros. Under 15 and even a modest stay tends to pay off. The ratio won't decide a specific home, but it tells you in ten seconds whether the market is worth modeling at all.
What Actually Moves the Break-Even Year
Five inputs do most of the work. Change one and watch the crossover slide years in either direction:
- How long you stay— the master lever. Every extra year past break-even compounds owning's lead by thousands.
- Appreciation rate— moving from 3% to 5% can pull the break-even year forward by 2-3 years. It's also the assumption you're most likely to get wrong.
- Mortgage rate — dropping from 7% to 5% on a $320,000 loan saves about $400 a month, money the renter would otherwise invest, so buying catches up faster.
- Investment return — a renter earning 8% instead of 5% on the down payment can push break-even out by several years. A strong market makes renting more competitive than people expect.
- Rent growth — if rents climb 5% a year instead of 3%, the fixed mortgage looks better every year and buying wins sooner.
The takeaway: buying isn't inherently smart or dumb. It's a long-hold, leveraged bet on a single asset, and its payoff depends on time and a handful of rates you should set conservatively.
When Renting Is the Smarter Money Move
Renting gets a bad reputation it doesn't deserve. There are clear cases where it's the disciplined financial choice, not the fallback. If you land here, use our rent affordability calculator to pin down a monthly rent that still leaves room to invest the difference:
- You might move within 3-4 years.A new job, a growing family, or an uncertain city means you're likely to sell before break-even and eat $40,000 in transaction costs.
- The price-to-rent ratio is above 21. In expensive metros, renting and investing the difference often beats owning for a decade or more.
- You'd be cash-poor after closing. Draining your savings for a down payment leaves no cushion for the water heater, roof, and HVAC that a landlord used to handle.
- You'll actually invest the difference. Renting only wins if the down payment and monthly savings go into the market — not into a bigger apartment and a nicer car.
That last point is the honest catch. Buying forces savings through mandatory principal payments; renting only builds wealth if you have the discipline to invest what you didn't spend. For many people, the forced-savings nature of a mortgage is the real reason owning wins — not the math, but the behavior.
The Assumptions That Can Flip the Answer
A rent vs buy calculator is a forecast, and a few assumptions can quietly reverse the verdict:
- Appreciation is a guess. Long-run U.S. home prices have risen roughly 3-4% a year — near inflation, per CFPB guidance on owning a home. Modeling 7% makes any purchase look brilliant, but it's a bet, not a plan.
- Tax breaks may not apply. This tool ignores the mortgage-interest deduction because most households take the standard deduction (about $29,000 for couples in 2026) and never itemize. If you do itemize, buying looks modestly better than shown.
- Maintenance is lumpy, not smooth. The 1% a year is an average; in practice it arrives as a $9,000 roof in one bad year and nothing the next.
- Rent control or a below-market lease changes everything. If your rent is locked well under market, the renting path is far stronger than a standard 3% growth assumption suggests.
Use the calculator to find your break-even year, then ask the only question that matters: are you confident you'll stay past it? If the honest answer is yes, buy and let time and equity do the work. If it's maybe, rent, invest the difference, and keep your options open — the flexibility is worth more than a break-even year you might never reach. When you're ready to see what price actually fits your income, start with our home affordability calculator.
