342,203.3595 is the example result. Read it using the units and relationship stated below.
Rent vs Buy uses home price, monthly rent, mortgage rate (%).
Comparing financial amounts on a defined basis
For rent vs buy, the relationship is Difference = total modeled mortgage payments − total rent over the loan term. Mortgage payment uses the loan annuity formula. This excludes ownership equity, resale value, taxes, insurance and maintenance. The amount depends on the supplied home price, monthly rent, rather than a live market price or a value imported from another record. A financial model is useful when its cash amounts, rate convention and time horizon describe the same case. Interest, return and purchasing power are different outputs. A projection should remain separate from an observed or audited balance.
What the model includes
Difference = total modeled mortgage payments − total rent over the loan term. Mortgage payment uses the loan annuity formula. This excludes ownership equity, resale value, taxes, insurance and maintenance. Check whether a rate is annual, monthly, simple or compounded. Enter fees only where the form represents them and identify contractual charges that remain outside the estimate. A monthly payment alone does not establish affordability or total ownership cost. Use the result to prepare the next question about terms or assumptions. Tax treatment, lender conditions and valuation evidence require the relevant source documents; they cannot be recovered from a few numeric inputs.
Example with the supplied inputs
Home price: 450000; Monthly rent: 2500; Mortgage rate (%): 6; Time horizon (years): 7. Result: 342,203.3595. The values are illustrative.
Compare one changed input
Home price changes from 450000 to 495000. The result becomes 397,423.6954. All other inputs remain fixed.
Calculation rule
Difference = total modeled mortgage payments − total rent over the loan term. Mortgage payment uses the loan annuity formula. This excludes ownership equity, resale value, taxes, insurance and maintenance.
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Home price | 450000 | Use home price on the currency and period basis shown by the formula. Keep gross amounts, net amounts and unit amounts distinct; the page does not fetch a price or exchange rate. |
| Monthly rent | 2500 | Use the source quantity represented by monthly rent. Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Mortgage rate (%) | 6 | Enter mortgage rate (%) on the percentage scale used in the formula (20 means 20%, not 0.20). Keep its base and reporting period consistent with the other inputs. |
| Time horizon (years) | 7 | Use the duration unit stated in time horizon (years). A time period is not interchangeable with a currency amount or a count of events. |
Output: 342,203.3595 is the example result. Read it using the units and relationship stated below. Use the formula to distinguish a cash amount, count, percentage or ratio.
How to use the page
Collect the inputs
Gather Home price, Monthly rent, Mortgage rate (%). Use one period and the units shown in the form.
Run the calculation
Enter the values and select the action. The calculation rule above explains how the inputs produce the result.
Compare a scenario
Change Home price on its own, keeping the other inputs fixed. Read both results before changing another assumption.
Worked example
With the example inputs listed above, the result is 342,203.3595.
Change Home price from 450000 to 495000 while keeping every other value fixed. The result becomes 397,423.6954. This comparison isolates that input; it does not forecast how other variables will respond.
Check the stated formula, units and limits before using the result in a decision.
Keep the displayed formula, input units and model scope with the result. Corrections or questions can be sent through the request section on this page.
Content updated: October 11, 2026