Rent vs Buy Calculator 2026

How the Rent vs Buy Calculator Works

The rent vs buy decision is one of the most consequential financial choices you will ever make. Our calculator performs a comprehensive net-wealth analysis, comparing the total cost of homeownership against renting and investing the difference. Rather than simply comparing monthly payments, it tracks equity building, opportunity costs, tax benefits, and the compounding effect of invested savings over time.

What We Calculate

On the buying side, we account for your mortgage payment (principal and interest), property taxes, homeowners insurance, HOA fees, maintenance costs, and closing costs. We track how your home equity grows through both principal paydown and property appreciation.

On the renting side, we model your monthly rent increasing annually, add renters insurance, and critically, we invest the difference between buying costs and renting costs at your specified investment return rate. We also invest the down payment and closing costs that a renter would otherwise put into the market.

The break-even year is when the homeowner's total net wealth (home equity plus any invested savings) exceeds the renter's total net wealth (invested savings from the down payment plus monthly cost differences).

Key Factors in the Rent vs Buy Decision

• How long you plan to stay: The longer you stay, the more buying typically favors you because closing costs and transaction fees are amortized over more years.
• Down payment opportunity cost: A 20% down payment on a $500K home is $100K that could be invested in the stock market instead. At 7% returns, that grows significantly.
• Local rent-to-price ratio: In cities where rents are low relative to home prices (like San Francisco), renting often wins. In cities with high rents relative to prices, buying tends to win.
• Interest rates: Higher mortgage rates increase the monthly cost of buying and push the break-even point further out. Each 1% increase in rates can add hundreds to your monthly payment.
• Home appreciation vs market returns: If the stock market outperforms real estate in your area, the renter who invests the difference comes out ahead.

The Price-to-Rent Ratio Rule of Thumb

A quick way to gauge whether renting or buying makes more sense: divide the home price by the annual rent. If the ratio is below 15, buying is usually favorable. Between 15 and 20 is a gray area. Above 20, renting and investing the difference typically builds more wealth. For example, a $400,000 home renting for $2,000/month has a ratio of about 16.7.

Common Mistakes in the Rent vs Buy Analysis

The biggest mistake people make is comparing only the mortgage payment to rent. True homeownership costs include property taxes, insurance, maintenance (typically 1-2% of home value per year), HOA fees, and the opportunity cost of the down payment. Many first-time buyers underestimate these by 30-50%.

Another common error is ignoring the investment return a renter earns on money not tied up in a down payment. That $80K to $200K invested in a diversified portfolio can compound significantly over a decade or more.

When Buying Almost Always Wins

If you plan to stay for 10+ years, have a low interest rate, live in an area with strong appreciation and high rents, and can make a 20% down payment without depleting your emergency fund, buying is almost always the better financial decision.

When Renting Almost Always Wins

If you plan to move within 3 years, live in an expensive coastal city with low rent-to-price ratios, expect interest rates to fall (enabling a future refinance), or have better investment opportunities for your down payment capital, renting typically wins.