Rent vs. Buy Calculator
Enter your rent details and potential home purchase parameters to compare the total cost of renting versus buying over your chosen time horizon. The calculator accounts for mortgage amortization, property appreciation, taxes, maintenance, insurance, and rent increases to give you a comprehensive comparison.
Tax notice: Tax calculations shown are simplified estimates for educational purposes. Actual tax liability depends on your individual circumstances, filing status, applicable deductions, and current tax law. This is not tax advice. Consult a CPA or tax professional. Full disclaimer.
What is Rent vs. Buy?
The rent-vs-buy decision is one of the most significant financial choices most people face. This calculator compares the total cost of renting (cumulative rent payments with annual increases) against the total cost of buying (down payment, mortgage payments, property taxes, maintenance, and insurance — minus the equity you build through appreciation and principal paydown). The "total buy cost" shown is a net figure: the gross costs of ownership minus the home equity you accumulate. Equity comes from two sources — property appreciation (the home increases in value) and principal paydown (each mortgage payment reduces your loan balance). When you eventually sell, this equity is returned to you (minus selling costs), making it more like forced savings than a pure expense. The comparison is highly sensitive to a few key variables. Mortgage interest rate is the most impactful — at 4%, buying wins in most scenarios after 5-7 years; at 8%, renting often wins for 10+ years. Annual appreciation is the second most important — the historical US average is about 3-4%, but individual markets vary dramatically. Rent increase rate matters too — in markets with rapid rent growth, buying provides a fixed housing cost that becomes increasingly advantageous over time. The calculator includes homeowner's insurance estimated at 0.5% of the home price annually. It does not include closing costs on sale (typically 5-6%), HOA fees, or the opportunity cost of the down payment (what you could earn if you invested that money instead of buying a home). These factors generally favor renting at the margin. This analysis considers only the financial dimension. Non-financial factors — stability, customization freedom, maintenance responsibility, mobility, community ties — are equally important and cannot be calculated. Many people rationally choose to rent even when buying is financially cheaper, or buy even when renting is cheaper, because their lifestyle priorities differ.
How to Calculate
- Enter your current monthly rent and expected annual rent increase
- Enter the home price, down payment percentage, mortgage rate, and loan term
- Enter the expected annual appreciation rate for the area
- Enter the property tax rate and annual maintenance percentage
- Set your time horizon — how long you plan to stay in the area
- Compare total rent cost against net buy cost and review the verdict
- Experiment with different rates and time horizons to see how the decision changes
Formula
Total Rent Cost = Sum of (Monthly Rent × 12) for each year, with rent increasing annually Monthly Mortgage = P × [r(1+r)^n] / [(1+r)^n - 1] where P = loan amount, r = monthly rate, n = total payments Total Buy Cost (Gross) = Down Payment + Total Mortgage Payments + (Property Tax + Maintenance + Insurance) × Years Home Equity = Future Home Value − Remaining Mortgage Balance Total Buy Cost (Net) = Total Buy Cost (Gross) − Home Equity Buying Advantage = Total Rent Cost − Total Buy Cost (Net). Positive means buying saves money. Insurance is estimated at 0.5% of home price annually. Future home value uses compound appreciation. Remaining mortgage balance is calculated by amortizing principal payments over the time horizon.
Example Calculation
Renting at $1,500/month with 3% annual increases vs. buying a $300,000 home with 20% down, 7% mortgage rate, 30-year term, 3% appreciation, 1.2% property tax, 1% maintenance, over 10 years: Total Rent Cost: $1,500/month compounding at 3%/year for 10 years ≈ $206,350 Down Payment: $60,000 Monthly Mortgage: $1,597 on $240,000 loan at 7% Total Mortgage Payments: $191,607 (10 years of payments) Ownership Costs: ($3,600 tax + $3,000 maintenance + $1,500 insurance) × 10 = $81,000 Gross Buy Cost: $60,000 + $191,607 + $81,000 = $332,607 Home Value After 10 Years: $300,000 × 1.03^10 = $403,175 Remaining Balance After 10 Years: ≈ $205,950 Home Equity: $403,175 − $205,950 = $197,225 Net Buy Cost: $332,607 − $197,225 = $135,382 Buying Advantage: $206,350 − $135,382 ≈ $70,968 In this example scenario, buying shows an estimated advantage of approximately $71,000 over 10 years — primarily driven by equity buildup from appreciation and principal paydown. Actual results depend on many factors not captured in this simplified model.
Frequently Asked Questions
How many years does it take for buying to become cheaper than renting?
It depends heavily on your market, but typically 5-7 years at normal mortgage rates (5-6%) and 7-12 years at higher rates (7-8%). The break-even point is when your accumulated equity exceeds the extra costs of ownership. Try adjusting the time horizon in this calculator to find your specific break-even year.
Does this calculator include closing costs?
The down payment input should include your closing costs (typically 2-5% of the purchase price). However, the calculator does not include selling costs (typically 5-6% of the sale price), which would reduce the buying advantage. If you plan to sell, subtract approximately 5-6% of the future home value from the equity figure for a more conservative estimate.
What mortgage rate should I use?
Use the rate you can currently qualify for, not a projected future rate. Check current rates at your bank or mortgage broker. As of 2025-2026, 30-year fixed rates in the US have been in the 6-7.5% range. Your specific rate depends on your credit score, down payment, and loan type.
What appreciation rate should I use?
The long-term US average is approximately 3-4% per year. However, individual markets vary dramatically. Use local data: check recent home price trends in your target neighborhood over the past 5-10 years. For a conservative estimate, use 2-3%. For a realistic estimate in a growing market, use 3-5%. Never assume double-digit appreciation will continue indefinitely.
Why does the calculator show buying is expensive at high mortgage rates?
At high mortgage rates, most of your monthly payment goes to interest rather than building equity. At 7%, only about $200 of a $1,596 monthly payment on a $240,000 loan goes to principal in the first year — the rest is interest. This means you build equity slowly while paying high carrying costs, making renting more competitive.
Should I factor in the investment return on my down payment?
For a rigorous analysis, yes — the down payment money could be invested in stocks or bonds instead. If you could earn 7-10% annually on that capital in the stock market, that is an opportunity cost of buying. This calculator does not include opportunity cost, which means it slightly favors buying. For a simple adjustment, add the expected investment return on your down payment to the total rent cost.