Mortgage or rent? In the starting example, renting finishes $22,447 ahead after 10 years. The comparison uses a $350,000 home, $2,000 monthly rent and the financing, ownership and investment assumptions below. Change any underlined number and the explanation, calculation sheets, timeline and answer update together.
A mortgage payment is not the same as the cost of owning, and rent is not automatically money “thrown away.” This article compares the wealth remaining at the same exit date: the buyer’s estimated sale proceeds and invested monthly savings against the renter’s invested upfront cash and monthly savings.
What belongs in a fair mortgage-versus-rent comparison
Buying: principal and interest are only the beginning. Property tax, homeowners insurance, PMI when applicable, maintenance, purchase costs and selling costs affect cash flow or realizable equity. Principal reduces the debt, so it is not treated as a consumed expense.
Renting: the renter begins with the cash that the buyer would use for the down payment and buyer closing costs. Each month, whichever side has the lower modeled housing cost invests the difference. This prevents the comparison from assuming that unused cash disappears.
Use a genuinely comparable home in the same location and condition. Utilities, moving costs and lifestyle benefits are omitted because they depend on the household and may not differ equally between the two choices.
Why the time horizon changes the answer
Purchase and sale costs are concentrated around the transaction, while mortgage principal is repaid gradually. A short holding period gives the buyer less time to offset those costs. Over longer periods, home-price changes, rent growth and investment returns compound, so modest assumption changes can reverse the result. There is no universal break-even year.
Build your comparison in the text
The underlined values are editable. They are planning assumptions, not national averages, forecasts, loan offers or tax advice.
What buying requires and costs at the start
The buyer commits $45,500 before a separate emergency reserve: $35,000 down and $10,500 of buyer closing costs. The original mortgage is $315,000 and the first modeled monthly ownership cost is $3,003.
Property tax, insurance, maintenance and PMI are separate assumptions. Replace them with figures for the property, insurer and loan. HOA dues, utilities, renovations and special assessments are not included.
What the buyer has at the selected exit
After 10 years, the estimated home value is $470,371 and $270,309 of mortgage remains. After $28,222 of selling costs, realizable home equity is $171,839. The buyer's invested monthly savings add $0, producing a $171,839 total position.
What the renter has over the same period
The renter starts by investing the same $45,500 that the buyer commits upfront. Comparable rent begins at $2,000 per month and reaches $2,688 in year 10. Monthly savings and investment growth produce a $194,286 renter position.
The direct answer
After 10 years, the buyer position is $171,839 and the renter position is $194,286. Renting leads by $22,447 under the entered assumptions. This is a scenario result, not a forecast.
Buying does not catch renting within the selected 10-year horizon. A later crossover is not promised.
How the answer changes over time
Each row is a selected milestone, not every forecast year, and represents a separate hypothetical exit at that year-end. Year 1, the selected horizon and any modeled crossover are always included. Selling costs and the remaining mortgage are already deducted from the buyer position; the values are not annual amounts to add together.
| Year | Buyer position | Renter position | Buy minus rent |
|---|
Which assumptions can reverse the result
A longer stay, lower purchase and sale costs, faster principal repayment, stronger home appreciation, higher comparable rent or lower ownership costs can favor buying. A shorter stay, higher financing and maintenance costs, weaker home prices or stronger net investment returns can favor renting.
Test several defensible scenarios instead of adjusting only the assumption that supports the answer you prefer. Financial output also cannot price mobility, renovation control, neighborhood stability, repair risk or the value of liquidity.
How the calculation works
The 30-year mortgage uses the standard fixed-payment amortization formula. Each month, interest is charged on the remaining balance and the rest of principal-and-interest reduces debt. The model adds property tax, insurance, maintenance and estimated PMI to ownership cash flow. PMI is modeled only while the scheduled balance exceeds 80% of the original price; actual cancellation conditions and exceptions remain loan-specific.
Home value, rent and investment balances compound monthly at annual-equivalent rates. Both sides receive the same starting cash and monthly housing budget; the lower-cost side invests the difference. At each year-end, the buyer position equals estimated home value minus selling costs and mortgage balance, plus the buyer portfolio. The renter position is the invested upfront cash plus invested monthly savings. Tax deductions, capital-gains tax, investment volatility, HOA dues, utilities and moving costs are excluded.