Gypes

Housing decision tool

Rent vs. buy calculator

Compare estimated net positions after renting or buying, including transaction costs and investing the cash-flow difference.

Compare the same home and the same time period. Use local ownership costs and a realistic rent quote. Gray placeholder numbers are examples only and are not used until you enter a value.

1Set the home price and down payment

Use a home comparable with the rental alternative and the cash-down scenario you are actually considering.

2Enter the mortgage quote

Copy the note rate and term from one current loan scenario. A cash purchase can use a 100% down payment and 0% rate.

3Add recurring ownership costs

Use local estimates for this property and keep taxes, insurance, and maintenance separate.

4Estimate buying and selling effects

These assumptions affect the owner’s net position when the comparison period ends.

5Enter the rental alternative

Use the rent and insurance for a genuinely comparable home, plus a defensible annual rent change.

6Choose time and opportunity cost

The model invests cash not tied up in the home at the assumed return and compares both paths at this horizon.

What this comparison measures

The model estimates the buyer’s net sale equity and the renter’s investment account after the chosen horizon. It begins the renter with cash equal to the modeled down payment and buying closing costs. Each month, the side with the lower housing cash outflow adds the difference to its modeled investment position.

Buying cash flow and equity

The buyer pays principal and interest on a fixed-rate mortgage, property tax based on the modeled home value, annual insurance divided monthly, and maintenance based on home value. Home value compounds monthly at the entered appreciation rate. At the horizon, modeled selling costs and the remaining loan balance are subtracted from home value.

Renting and opportunity cost

Rent changes monthly at the entered annual growth rate and renter insurance is added. The alternative investment compounds monthly at the entered return. When buying costs more during a month, the difference is added to the renter’s investment; when renting costs more, that difference reduces the renter’s modeled account. This symmetric treatment prevents the calculator from assuming one household can spend more without consequence.

What the result does not decide

Taxes, deductions, mortgage insurance, association fees, utilities, renovations, deposits, moving costs, rent concessions, investment taxes and fees, financing points, irregular repairs, and differences in property quality are excluded. Appreciation, rent growth, returns, insurance, and costs are uncertain. The model does not value flexibility, stability, school access, commute, control of the property, or moving risk.

Use scenarios instead of one forecast

Change the horizon first, then test lower and higher appreciation, maintenance, rent growth, investment return, and transaction costs. Short ownership periods often make transaction costs especially important. Compare the mortgage payment with the Mortgage Amortization Calculator, and read the detailed rent-versus-buy guide before interpreting a small difference.

This is an educational scenario, not real-estate, mortgage, investment, tax, legal, or financial advice. It does not predict prices, rents, returns, repairs, rates, taxes, or eligibility. Verify actual quotes, contracts, local rules, property condition, affordability, and professional guidance before making a housing decision.