What this means
This calculator gives a quick estimate for rental income vs mortgage using the numbers you enter. The main result is meant to help you understand the size of the number and compare a few practical scenarios without building a full spreadsheet. It is most useful as a first-pass planning tool: change one input, tap Calculate again, and use the related calculators below to check nearby questions. This is an investment planning estimate. Market rents, financing, taxes, expenses, vacancy, appreciation, and liquidity can materially change returns. Before making a high-stakes decision, confirm the details that matter most, such as local prices, taxes, benefits, loan terms, legal rules, insurance plan details, or live market data.
Rental Income vs Mortgage Calculator
Last updated July 2, 2026
Last reviewed July 8, 2026
Rental income versus mortgage coverage is a landlord cash-flow screen: it asks whether rent and other property income are enough to cover the mortgage and owner-paid operating costs. The calculation should start with monthly rent, subtract vacancy, management, repairs, utilities, taxes, insurance, HOA, capital reserves, and other recurring expenses, then compare the remaining income with the mortgage payment. A property can have rent above the mortgage and still be cash-flow negative once realistic expenses are included.
Percentage-based expenses should move when rent changes. If rent falls by 10 percent, vacancy allowance and management fees based on rent should generally fall too, while fixed costs such as insurance or HOA remain fixed unless the user changes them. That is why scenario rows need to recompute the whole rental ledger instead of subtracting a flat amount from the baseline. Other monthly income, such as parking or laundry income, should be preserved unless the scenario explicitly changes it.
Use the rental income versus mortgage calculator to test whether the property covers debt service on a realistic operating basis. A positive result is not a full investment recommendation; it is a monthly cash-flow screen before taxes, appreciation, financing changes, major repairs, legal risk, and vacancy shocks. If rent barely covers the mortgage before expenses, the property probably needs a deeper underwriting pass before purchase.
How this is estimated
Assumptions used
Calculator updated 2026-06-19
Calculator reviewed 2026-07-08
- Compares rent against mortgage-only and full ownership cost
- Vacancy, maintenance, management, utilities, HOA, and capex can change the result
- Positive rent-minus-mortgage is not the same as positive cash flow
Source and freshness note
Calculator formulas use stored metadata, visible assumptions, and the input fields shown on this page. Educational-use framing appears in the site footer and disclaimer.
This calculator uses either reviewed annual constants, public-data helpers, editable planning assumptions, or location-sensitive inputs. The Sources page shows reviewed dates for shared data sets, and user-entered values remain part of the estimate.
Page-level sources for the article above appear in its Sources section when the article uses category-specific references. Shared data sources are summarized on the Sources page.
