What the Break-Even Year Tells You
Buying a home costs a lot up front (down payment, closing costs) and then moderately every month. Renting costs nothing up front and then moderately every month, forever. The two cost curves cross somewhere — that crossing point is your break-even year: the first year where the total cost of owning, including what you give up by not investing that money, drops below the total cost of renting.
Stay longer than the break-even year and owning wins. Leave before it and renting wins. That single number compresses most of the rent-vs-buy decision into one honest comparison — which is why every serious analysis starts with it.
One thing to watch: the break-even year is usually farther out than people expect. Transaction costs alone (typically 3% to buy plus 6% to sell) mean a $400,000 home starts roughly $36,000 behind, and at a typical rent level that hole takes years to dig out of — even with appreciation and principal paydown working in your favor.
The Five Inputs That Swing the Answer
- Rent vs. price ratio. The single biggest driver. If the home you'd buy rents for much less than ~0.6% of its price per month, renting starts far ahead; above that, owning closes in quickly.
- Your mortgage rate vs. your investment return. A 6.5% mortgage against a 6% expected return makes extra principal roughly a wash financially — but a 3% mortgage against a 6% return makes buying with minimum down and investing the difference look much better.
- How long you stay. Every year past the break-even point compounds in owning's favor. This is why the classic advice is simple: plan to stay under ~5 years, rent; over ~10, buy; in between, run the numbers.
- Appreciation and rent growth. High rent growth hurts renters every single year; appreciation only helps owners when they eventually sell (and gets haircut by selling costs).
- Transaction costs. Buying and selling a home typically costs 8–9% of its value all-in. Short stays barely give those costs time to amortize.
Year-by-Year Comparison
Net cost = everything you paid (with the investment return you gave up) minus sale proceeds if you sold that year. Green marks the years where owning is cheaper.
| Year | Owning (net) | Renting (net) | Cheaper |
|---|---|---|---|
| 1 | $62,272 | $24,856 | Renting |
| 2 | $90,642 | $51,986 | Renting |
| 3 | $121,253 | $81,551 | Renting |
| 4 | $154,257 | $113,724 | Renting |
| 5 | $189,816 | $148,691 | Renting |
| 6 | $228,103 | $186,648 | Renting |
| 7 | $269,302 | $227,803 | Renting |
Worked Example: The Default Numbers
With the defaults loaded in the calculator above — a $400,000 home, 15% down at 6.5% for 30 years, $2,000/month rent growing 3% a year, and a 6% investment return — owning runs about $2,999/month all-in (principal and interest, property tax, insurance, maintenance), roughly $984 more per month than renting at the start.
But the monthly gap shrinks as rent grows while the fixed-rate payment doesn't, and every mortgage payment quietly builds equity. The year-by-year table above shows exactly when the lines cross for your inputs — change any number and it re-solves instantly.
What This Calculator Leaves Out
- PMI. If you put less than 20% down you'll likely pay mortgage insurance (0.5–1.5%/yr) until you reach 20% equity. Approximate it by raising the Home Insurance input until then.
- Tax deductions. Mortgage interest and property tax may be deductible if you itemize — but most owners take the standard deduction and get no benefit. If you do itemize, lower the mortgage rate a bit to approximate the after-tax rate.
- Mobility and risk. Renting keeps options open; owning locks you in and concentrates your net worth in one asset. Neither shows up in the math, both matter.
- Lump-sum costs. Furniture, moving, HOA fees (add them to Maintenance), and big repairs arrive unevenly; the calculator smooths maintenance into 1%/yr, which is the standard rule of thumb.
Common Questions
How is the break-even year calculated?
The break-even year is the first year where the total cost of owning — every mortgage payment, tax, insurance, and maintenance cost, plus the investment return that money could have earned instead, minus the sale proceeds if you sold that year — drops below the total cost of renting over the same period. The year-by-year table shows both totals for each year so you can see exactly where the lines cross.
What does the investment return input do?
It charges opportunity cost to both sides. Every dollar you spend — the buyer's down payment and closing costs, and everyone's monthly payments — is compounded at this rate as if it had been invested instead. This is what makes the comparison fair: buying ties up a large lump sum that renting leaves free to grow. A lower assumed return makes buying look better; a higher one favors renting.
Does the calculator include PMI?
No. If your down payment is under 20%, private mortgage insurance typically adds 0.5–1.5% of the loan per year until you reach 20% equity (it auto-cancels at 78% on conventional loans). To approximate it, raise the Home Insurance input by that amount — the effect fades after the first few years anyway.
Does it account for the mortgage interest tax deduction?
No, and for most owners it wouldn't matter: since the 2017 tax reform raised the standard deduction, fewer than 10% of taxpayers itemize, and you only benefit from the deduction if you itemize. If you do itemize, approximate the effect by lowering the mortgage rate input to your effective after-tax rate.
Related Calculators
- Mortgage Calculator — Monthly payment and amortization for the buying side
- Mortgage Payoff Calculator — How extra payments change the owning curve
- Compound Interest Calculator — Model the investment return renters keep