Rental property mortgage calculator with income

Rent can offset the monthly carrying cost, but only after you include the expenses and empty periods that come with the property.

Updated July 21, 2026

Separate the mortgage from the property budget

Start with the loan payment, property tax, insurance and mortgage insurance. Then list association dues, utilities paid by the owner, management, routine maintenance and other recurring costs.

Keep major repairs, vacancy and capital reserves visible even if they are not a fixed monthly bill. A calculation that assumes every rent dollar is available for the mortgage overstates the result.

Use rent you can defend

Use a signed lease for an occupied unit or a conservative market estimate supported by comparable local properties. Test a lower-rent plan and a vacancy plan. The gap shows how dependent the mortgage is on continuous income.

Monthly carrying-cost example

If the mortgage and recurring property costs total $2,800 and conservative rent is $2,250, the estimated carrying cost before reserves is $550 per month. A vacancy or repair can increase it quickly.

Add rental income in Bricks Calc

  1. Create the mortgage with the purchase price, down payment, rate and term.
  2. Add property tax, insurance and recurring expenses.
  3. Add expected monthly rental income.
  4. Review the estimated net monthly carrying cost.
  5. Duplicate the plan for lower rent, vacancy or higher expenses.

Save each plan with a clear name so the assumptions stay visible when you compare them later.

Use the result as one part of due diligence

The mortgage scenario does not calculate tax treatment, depreciation, property appreciation, transaction costs or every operating risk. It is a focused way to understand the debt payment and monthly cash-flow inputs.

Bricks Calc is not an investment analysis, appraisal, tax tool or lending decision. Confirm local costs and professional advice where needed.

Model rent against the real costs

Compare expected income with the mortgage and recurring property expenses.

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