How the Rent vs. Buy Calculator Works
The calculator computes the true total cost of each path over your planned holding period. Buying costs include mortgage payments (principal and interest), property taxes, home insurance, maintenance, HOA fees, and closing costs — minus the net equity you recover when you sell (home value at appreciation minus remaining mortgage balance and selling costs). Renting costs are your monthly rent, growing each year at your specified rate.
The calculator also accounts for opportunity cost: the down payment and closing costs you would have invested in the market instead of putting into a home. This is a critical factor that simple rent vs. mortgage comparisons miss. By including it on the buying side, the comparison reflects the true financial trade-off.
The Break-Even Point
The break-even year is the first year when your cumulative cost of buying falls below your cumulative cost of renting. Before that year, renting is cheaper on a total-cost basis. After it, buying is cheaper.
In most U.S. markets, the break-even point falls between 4 and 8 years, depending on local home prices relative to rent levels, your mortgage rate, and expected appreciation. The higher the price-to-rent ratio in your market, the longer it takes to break even. If you plan to move before your break-even year, renting is usually the financially safer choice.
| Holding Period | Typical Outcome | Key Factor |
|---|---|---|
| Under 3 years | Rent usually wins | Closing costs not recovered |
| 3–5 years | Depends on market | Price-to-rent ratio matters most |
| 5–8 years | Often neutral to buy | Appreciation starts to compound |
| 8+ years | Buy often wins | Equity and appreciation accumulate |
When Buying Wins (And When It Does Not)
Buying tends to win when you stay long enough for equity and appreciation to compound, when local rent is high relative to mortgage payments (a low price-to-rent ratio), and when mortgage rates are moderate. It also has non-financial benefits: stability, the ability to customize your home, and protection from rent increases.
Renting tends to win when you value flexibility, when the price-to-rent ratio is high (buying is expensive relative to rent), when mortgage rates are elevated, or when you would invest the down payment aggressively in the market. Renting also has lower transaction costs — there are no 3% closing costs or 6% selling commissions when you move.
The honest answer is that neither path is universally better. The calculator gives you the numbers so you can make the decision that fits your timeline, financial situation, and life goals.
Questions You Might Ask
Is it better to rent or buy a home?
It depends on how long you plan to stay, local home prices relative to rent, mortgage rates, and your investment alternatives for the down payment. In most U.S. markets, buying becomes the cheaper option after 5–8 years. If you expect to move in under 3 years, renting is usually safer financially because closing and selling costs take time to recover.
What is opportunity cost and why does it matter?
Opportunity cost is what you give up by locking capital in a down payment instead of investing it. A $100,000 down payment invested at 7% for 10 years grows to about $197,000. That foregone growth is a real cost of buying that a simple mortgage-vs-rent payment comparison ignores. Our calculator includes it so both paths are compared on equal footing.
How much does home appreciation matter?
Appreciation is the multiplier that makes buying powerful over long time horizons. At 3% annual appreciation, a $400,000 home is worth roughly $478,000 after 7 years — before accounting for equity paid down through mortgage payments. That growth is tax-advantaged (up to $250,000 / $500,000 exclusion) and can flip a neutral decision decisively toward buying. Use the calculator's Advanced Assumptions to adjust appreciation and see how sensitive the outcome is.
What does the calculator not account for?
The calculator does not model mortgage interest deductibility (which benefits itemizers), property tax deductions, capital gains tax on investment returns (which would reduce the renting opportunity cost), or local market-specific factors like rent control. Results are estimates intended to guide your decision-making, not replace personalized financial advice.
Methodology
The buying cost model uses the standard fixed-rate amortization formula for monthly principal and interest, plus property tax, insurance, maintenance (as a percentage of home value), and HOA fees. Upfront closing costs are added and net equity (home value at appreciation minus remaining mortgage balance minus selling costs) is subtracted. Opportunity cost is computed as the compound growth of the down payment plus closing costs at the specified investment return rate. Renting costs compound annually at the rent increase rate. Break-even is calculated year by year. All calculations run client-side in your browser. Last updated: May 2026.