Rent vs Buy Home Affordability Calculator

Compare the long-term financial cost of renting versus buying a home, accounting for your mortgage, taxes, insurance, maintenance, home appreciation, and investment returns.

Mathematical Audit

Rent vs Buy Formula

This calculator projects the total cost of buying and the total cost of renting over your chosen time horizon, then compares the net financial position of each option after accounting for home equity, selling costs, and investment growth on money not spent on a down payment.

Monthly Mortgage Payment (P&I) = L × r ÷ (1 − (1 + r)^−n), where L is the loan amount and r is the monthly interest rate
Monthly Ownership Cost = Mortgage P&I + Property Tax + Home Insurance + Maintenance
Net Cost of Buying = Total Cash Spent on Ownership − (Home Value − Remaining Loan Balance − Selling Costs)
Net Cost of Renting = Total Rent Paid − Value of Invested Down Payment & Monthly Savings Difference
If Net Cost of Renting > Net Cost of Buying, buying is the better financial choice (and vice versa)

This model assumes that any money not spent on a down payment, closing costs, or higher monthly ownership costs is invested and grows at your chosen investment return rate. It does not account for taxes on investment gains, mortgage interest tax deductions, or one-time moving costs, and is intended for educational comparison rather than a precise financial projection.

Operational Guide

How to Use the Rent vs Buy Calculator

1

Enter the home purchase details

Add the home price, down payment percentage, mortgage rate, loan term, and one-time closing costs.

2

Enter ongoing ownership costs

Add your estimated property tax rate, annual homeowners insurance, and maintenance costs as a percentage of home value.

3

Enter your renting details

Add your current monthly rent and how much you expect rent to increase each year.

4

Enter growth assumptions and time horizon

Add expected home appreciation, the return you'd expect on invested savings, and how many years you plan to compare.

5

Compare your results

Review the net cost of buying versus renting over your time horizon to see which option leaves you financially ahead.

Real-World Scenario Example

"A $350,000 home with a 20% down payment, a 6.5% 30-year mortgage, 1.1% property tax, $1,500/year insurance, 1% maintenance, compared against $2,200/month rent rising 3% per year, with 3.5% home appreciation and a 6% investment return over a 7-year horizon."

Inputs

homePrice:350000
downPaymentPercent:20
mortgageRate:6.5
loanTermYears:30
propertyTaxRate:1.1
annualHomeInsurance:1500
maintenanceRatePercent:1
monthlyRent:2200
annualRentIncrease:3
homeAppreciationRate:3.5
investmentReturnRate:6
comparisonYears:7
closingCostPercent:3
sellingCostPercent:6

Result

The monthly mortgage payment (P&I) is $1,769.79, with a total monthly ownership cost starting around $2,507.29. Over 7 years, buying has a net cost of about $132,504.97, while renting has a net cost of about $61,485.75 — making renting the better financial choice by roughly $71,019 in this scenario.

Important Disclaimer

This calculator provides estimates for educational purposes only and does not constitute financial, tax, or real estate advice. Actual costs, tax treatment, home values, and investment returns will vary. Consult a qualified financial advisor, tax professional, or real estate professional before making a decision to rent or buy.