Rent vs Buy Calculator — Breakeven, Total Cost & Monthly Comparison

How to Use the Rent vs Buy Calculator

1. Enter the home price you are considering and your expected down payment percentage (typically 5–20% for primary residences).
2. Set the current mortgage interest rate and loan term (30 years is the most common for homebuyers). The calculator computes your monthly P&I payment automatically.
3. Fill in annual homeownership costs: property tax rate (check your county, typically 0.5–2%), home insurance, HOA fees, and maintenance (budget 1% of home value per year).
4. Enter buying closing costs (typically 2–5% of purchase price) and selling costs (typically 5–6%, including agent commissions) to capture the full transaction cost of homeownership.
5. In the Renting section, enter your current or target monthly rent, expected annual rent increase (typically 2–4%), and renter's insurance cost.
6. Set the investment return rate — this is the assumed annual return the renter earns by investing the down payment and closing costs in a diversified portfolio instead (historically ~5–7% real return for index funds).
7. Set the number of years you plan to stay in the home. This is the most important variable — the longer you stay, the more buying tends to win.
8. Review the verdict, total costs, breakeven year, and the detailed cost breakdowns for both scenarios.

Understanding the Rent vs Buy Decision

The rent vs buy decision is one of the largest financial choices most people make. The answer depends on far more than the monthly payment comparison — it requires accounting for total cost of ownership, the opportunity cost of your down payment, home appreciation, rent inflation, and how long you plan to stay. This calculator models all of these factors to give you a true apples-to-apples comparison.

Total Cost of Ownership is what actually matters when comparing renting to buying — not just the monthly mortgage payment. For buying, the true cost includes: down payment, closing costs, all mortgage payments over the holding period, property taxes, insurance, HOA fees, maintenance, and the selling costs when you eventually move — minus the net sale proceeds (appreciation gain minus remaining loan balance minus selling costs). For renting, the true cost is: total rent paid, renter's insurance — minus the investment return you earn by keeping your down payment working in the market rather than tied up in home equity.

Breakeven Year is the point at which cumulative buying costs fall below cumulative renting costs — meaning buying has "paid off" the transaction costs and ownership overhead relative to renting. Before the breakeven year, renting is cheaper in total; after it, buying is cheaper. The breakeven year is critically sensitive to: home appreciation, selling costs, and your investment return assumption. High selling costs (agent commissions) push breakeven further out; strong appreciation pulls it in.

Opportunity Cost of the Down Payment is the hidden cost of buying that most mortgage calculators ignore. When you put $80,000 into a down payment, that money cannot be invested elsewhere. A renter who keeps that $80,000 in a diversified index fund earning 5% annually will accumulate significant gains over 7–10 years. This opportunity cost is a direct offset to renting's total cost — and is one reason renting is often the financially superior choice in expensive markets where the down payment is very large relative to rent.

The 5-Year Rule is a widely-cited guideline suggesting you should plan to stay in a home for at least 5 years before buying makes financial sense. This rule accounts for the fact that buying and selling transaction costs (agent commissions, closing costs) are very high — typically 8–10% of the home price in total. Until appreciation and equity buildup offset those transaction costs, you are likely better off renting. However, the 5-year rule is a rough guideline — in markets with high appreciation and relatively affordable homes compared to rent, breakeven may come earlier. In expensive markets with low cap rates (where homes are priced high relative to rents), breakeven can be 10+ years.

Frequently Asked Questions

• Is it always better to buy than rent?
  No — whether buying or renting is better depends on your specific numbers: home price, rent in your market, how long you plan to stay, and local appreciation rates. In expensive coastal markets (San Francisco, New York, Seattle), the price-to-rent ratio is very high, meaning homes are expensive relative to rents — and renting while investing the down payment can outperform buying for 10+ years. In affordable Midwest markets, buying often wins within 3–5 years. This calculator gives you the honest answer for your specific situation.
• What is the price-to-rent ratio and how does it affect the decision?
  The price-to-rent ratio is home price divided by annual rent. A ratio below 15 strongly favors buying; 15–20 is a neutral zone where either can win depending on your timeline; above 20 generally favors renting. In many major cities, price-to-rent ratios are 25–40+, which means renting and investing is often the better financial choice unless you plan to stay 10+ years. For example, a $400,000 home with $2,200/month rent has a P/R ratio of about 15 — right in the neutral zone where your stay length becomes the deciding factor.
• Why does the calculator include opportunity cost on the down payment?
  The down payment is real capital that has an alternative use. If you don't buy, you can invest that money. A $80,000 down payment invested at 5% annually for 7 years grows by about $37,000. That $37,000 gain is a genuine benefit of renting — it reduces the true cost of the renting scenario. Ignoring opportunity cost makes buying look cheaper than it really is. This is the most commonly overlooked factor in rent-vs-buy comparisons, and one reason standard mortgage calculators systematically undercount the cost of buying.
• How does home appreciation affect the breakeven?
  Appreciation has a large impact. Strong appreciation (4–5%/yr) pulls in the breakeven year significantly because your net sale proceeds increase, reducing your true cost of buying. Weak or negative appreciation extends the breakeven — if your home doesn't appreciate, you're paying transaction costs and carrying costs without building equity relative to value. The historical national average for home appreciation is roughly 3–4% nominally. But local markets vary enormously — adjust this input to your specific market's recent trend.
• What investment return should I assume for the renter's portfolio?
  A common assumption for a diversified index fund portfolio is 5–7% real (inflation-adjusted) annual return, based on long-run US stock market history. In nominal terms, 7–10% has been the historical average. However, the future is uncertain. Using 5% is conservative and reasonable for planning purposes. Note: the higher the investment return assumption, the more renting benefits — because the renter's invested down payment grows faster. If you have low risk tolerance and would put the money in bonds or savings, use 3–4%.
• I own a rental property — is this calculator relevant to me?
  This calculator is designed for the primary residence rent vs buy decision. If you're analyzing whether to buy an investment property versus keeping your capital invested elsewhere, the analysis framework is similar but you should also account for rental income. For buy-and-hold rental property analysis, see our Rental Property Cash Flow Calculator, which covers NOI, cap rate, cash-on-cash return, DSCR, and the 1% rule for investment properties.