Rent vs Buy Calculator — The Real Cost Comparison

How the Rent vs Buy Calculation Works

The rent vs buy decision is more than comparing a monthly mortgage payment to monthly rent. A proper analysis tracks every dollar over your expected time horizon and accounts for wealth built on both sides of the equation.

On the buying side, the calculator tallies all monthly outflows — mortgage principal and interest, property taxes, homeowners insurance, HOA dues, and maintenance. It then credits back the tax deduction from mortgage interest and property taxes, and tracks equity buildup from both principal payments and home appreciation. At the end of your time horizon, it subtracts estimated selling costs (agent commissions, transfer taxes) to arrive at a true net position.

On the renting side, the calculator assumes you invest the money you would have put toward a down payment and closing costs into a diversified portfolio earning your specified return rate. Each year, if renting is cheaper on a monthly basis, the difference is added to the investment portfolio. Annual rent increases compound over the time horizon.

The final comparison weighs the buyer's home equity (net of selling costs) against the renter's investment portfolio, plus the cumulative difference in out-of-pocket costs over the entire period. This gives you a comprehensive, apples-to-apples financial comparison.

The Hidden Costs of Buying a Home

Many first-time buyers focus on the mortgage payment and forget about the significant costs that come with homeownership. Understanding these is essential to making an accurate comparison.

• Closing costs (2-5% of home price). On a $350,000 home, that is $7,000 to $17,500 in upfront cash you will never recover. This includes lender fees, title insurance, appraisal, and recording fees.
• Maintenance and repairs (1-2% of home value per year). A $350,000 home costs $3,500 to $7,000 annually in maintenance — roof repairs, HVAC servicing, plumbing, appliance replacement. This is money renters never spend.
• Opportunity cost of the down payment. A 20% down payment of $70,000 invested in the stock market at 7% annual returns would grow to roughly $112,000 over seven years. That is $42,000 in gains you forgo by tying your money up in a house.
• Selling costs (5-8% of home value). When you eventually sell, agent commissions alone typically run 5-6% of the sale price. On a home that has appreciated to $430,000, that is $21,500 to $25,800 straight off the top of your equity.

These costs are real and substantial. The calculator above factors all of them in, which is why the results often surprise people who assumed buying is always cheaper than renting.

The Hidden Costs of Renting

Renting has its own set of financial downsides that are easy to overlook when making the comparison.

• No equity buildup. Every rent check is a pure expense. After ten years of renting, you own nothing. A homeowner who made the same monthly payments has built tens of thousands in equity through principal paydown and appreciation.
• Rent increases compound aggressively. At a 3% annual increase, $2,000/month rent becomes $2,687/month after ten years and $3,612 after twenty. A fixed-rate mortgage payment never changes, so the gap between buying costs and renting costs widens each year.
• No mortgage interest tax deduction. Homeowners can deduct mortgage interest and property taxes, effectively reducing the cost of ownership. Renters receive no comparable tax benefit from housing expenses.
• Requires investment discipline. The "rent and invest the difference" strategy only works if you actually invest the savings consistently. A mortgage functions as forced savings — the investment discipline is built into the payment structure.

When Does Buying Make More Sense?

Several key factors tilt the equation toward buying:

Time horizon is the single biggest factor. Buying almost always wins over long periods (10+ years) because the fixed mortgage payment becomes relatively cheaper as rents rise, and home equity compounds through appreciation and principal paydown. The break-even point — when buying overtakes renting — typically falls between 3 and 7 years, depending on market conditions.

Strong local appreciation tips the scales. In markets where home prices consistently grow 4-5% or more annually, the equity gains from appreciation can outweigh the higher upfront costs of buying within just a few years. Use the appreciation slider in the calculator to see how different growth rates affect the outcome.

Low interest rates dramatically favor buying. When mortgage rates are low, a larger share of each payment goes toward principal (equity), and the total interest paid over the life of the loan is much lower. The difference between a 4% and a 7% rate on a $280,000 loan is over $200,000 in total interest.

High local rents relative to home prices. This is captured by the price-to-rent ratio. When the ratio is low (below 15-16), buying tends to be cheaper. When it is high (above 20-21), renting tends to win. At the default values in this calculator, the price-to-rent ratio is 15:1.

The Break-Even Point

The break-even point is the year when the cumulative cost of buying drops below the cumulative cost of renting. Before this point, you would have been financially better off renting; after it, buying is the better deal.

Typical break-even ranges are 3 to 7 years in most markets, but this can vary dramatically based on your inputs. In expensive coastal markets with high price-to-rent ratios, the break-even can extend to 10-15 years or more. In affordable Midwest and Sun Belt markets where rents are high relative to home prices, buying can break even in as little as 2-3 years.

The break-even calculation is sensitive to three inputs above all others: interest rate, home appreciation rate, and time horizon. Small changes in any of these can shift the break-even point by several years. Use the sliders in the calculator to see how adjustments affect the result in real time.

Why this matters for your decision: If you are not confident you will stay in the home past the break-even point, renting is likely the safer financial choice. The transaction costs of buying and selling (closing costs + agent commissions) create a significant hurdle that only time and appreciation can overcome.

How Interest Rates Affect the Rent vs Buy Decision

Interest rates are arguably the most impactful variable in the rent vs buy equation. They affect both the monthly payment and how quickly you build equity.

At a 7% mortgage rate (close to current rates in early 2026), the monthly payment on a $280,000 loan is approximately $1,863. In the first year, about $1,633 of each monthly payment goes to interest and only $230 goes to principal. That means you are building equity very slowly while paying a high monthly cost — a double headwind for the buying case.

Compare this to a 4% rate: the same loan costs $1,337/month, and $403 goes to principal in month one. The buyer saves $526/month in payments and builds equity 75% faster. This is why the rent vs buy calculation was dramatically more favorable to buying during the low-rate environment of 2020-2021.

If you are on the fence in today's higher-rate environment, consider that rates may come down in the future, allowing you to refinance. The calculator uses a fixed rate for the entire horizon, so the current result represents a conservative scenario if rates decline. Adjust the interest rate input to model different refinancing scenarios.

Frequently Asked Questions