Rent vs. Buy: What If You Invest the Difference?

Buying a home builds equity. Renting may leave more cash available to invest. Put both paths into numbers and compare their estimated wealth over time.

Rent vs. buy is more than rent versus a mortgage payment

A fair comparison needs to include more than the monthly mortgage payment. Homeowners can face property taxes, homeowners insurance, maintenance, homeowners association dues and upfront closing costs. The Consumer Financial Protection Bureau notes that homeownership can involve taxes, insurance, repairs and HOA dues, while closing costs often add another meaningful upfront expense.

How this calculator compares the two paths

The calculator starts both choices with the same available cash. On the buying side, that cash is used for the down payment and estimated buying closing costs. On the renting side, that same amount is invested. Each month, the model compares the homeowner's modeled housing cash outflow with rent. If owning costs more, the renter invests the difference. If renting costs more, the buyer invests that difference in a separate side portfolio. This keeps the comparison closer to an equal-budget test instead of giving only one side credit for monthly savings.

What counts as homeowner wealth?

Mortgage principal is not treated purely as an expense because paying down principal reduces the loan balance. At each year, homeowner wealth is estimated as the projected home value minus the remaining mortgage and estimated selling costs, plus any side investment accumulated when owning was cheaper than renting.

Why investing the difference matters

Renting only produces the modeled investment advantage if the unused upfront cash and monthly savings are actually invested. Investment returns are not guaranteed and can be negative. The return input is therefore an assumption, not a forecast.

Property tax: editable now, ZIP estimate later

Property taxes can vary substantially by location and by the specific property, taxing districts, assessed value and exemptions. A ZIP code alone cannot determine an exact tax bill. For this version, enter an estimated annual property-tax rate and adjust it if you have a better number from a listing, tax record or local authority. MoneyInNumbers can later add ZIP-based estimates as a convenience layer while keeping the rate editable.

Closing costs can change the short-term math

The CFPB says buyer closing costs commonly fall around 2% to 5% of the purchase price, excluding the down payment, though actual costs vary by loan, location and transaction. The calculator lets you change the buying-closing-cost assumption and separately model estimated selling costs at the end of the comparison period.

Tax benefits are intentionally excluded

This first version does not estimate federal or state tax benefits. The IRS notes that qualifying mortgage interest and certain real-estate taxes may be deductible for eligible taxpayers, generally when deductions are itemized and subject to applicable limits. Because tax circumstances vary, the calculator does not assume every homeowner receives the same tax benefit.

The crossover year is useful—but it is not a guarantee

The chart identifies the first modeled year in which the buying path catches or exceeds the rent-and-invest path. Changing just one assumption—mortgage rate, rent growth, appreciation, investment return, property tax or time horizon—can move that crossover or remove it entirely. Treat it as a scenario result, not a prediction.

Sources and further reading

• Consumer Financial Protection Bureau — upfront homebuying and closing costs
• Consumer Financial Protection Bureau — costs and responsibilities of homeownership
• Internal Revenue Service — potential tax benefits of homeownership
• Investor.gov — investing, risk and compound growth

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