ToolifyToolkit
EN中
HomeProperty investingMultifamily rental cash flow calculator
Money & mortgage

Multifamily rental cash flow calculator

Estimate multifamily gross potential rent, effective income, operating expenses, NOI, debt service, and monthly cash flow.

  • USD inputs · transparent calculation assumptions
  • Instant updates as inputs change
  • Data is calculated in this browser only
USD inputs · transparent calculation assumptions
Your scenario
Updates as you type
Estimated monthly cash flow$52.00
Gross potential rent
$43,200.00
Effective gross income
$41,040.00
Operating expenses
$16,416.00
Net operating income
$24,624.00
Annual debt service
$24,000.00
Annual cash flow
$624.00
Debt-service coverage ratio
1.03
Break-even occupancy
93.56%
Calculation notes

Understand the Multifamily rental cash flow calculator

The Multifamily Rental Cash Flow Calculator validates every input, normalizes monthly and annual amounts, and calculates gross potential rent, vacancy, operating expenses, NOI, debt service, and DSCR from one consistent scenario.

Formula and logic

How does the Multifamily Rental Cash Flow Calculator calculate gross potential rent, vacancy, operating expenses, NOI, debt service, and DSCR?

Potential rent G = units × average monthly rent × 12. Effective income E = G × (1−vacancy). NOI = E × (1−operating-expense ratio). Annual cash flow = NOI − annual debt service D; DSCR = NOI / D. The displayed occupancy reference uses current expenses plus D divided by G.

Worked example

What does a worked Multifamily Rental Cash Flow Calculator example show?

Two units at $1,800 monthly rent produce $43,200 potential income. At 5% vacancy and 40% expense ratio, NOI is $24,624. A $2,000 monthly mortgage costs $24,000 a year, leaving $624 annually or $52 monthly; DSCR is 1.026.

How to read the result

How should I interpret the Multifamily Rental Cash Flow Calculator results?

  • DSCR barely above 1 leaves little room for rent loss or repairs; a positive number alone is not a sufficient reserve.
  • The occupancy reference freezes current expenses; an exact break-even analysis would separate fixed and variable costs.
Limits and assumptions

Which costs, rules, or risks are outside the Multifamily Rental Cash Flow Calculator?

  • A single average rent and expense ratio hide differences across units. Capital expenditure, management detail, rent concessions and tax are excluded.

Content and calculation reviewed:

Understand the calculation

How to use it and the math behind it

Read the complete explanation

Four steps to check your inputs and results

  1. Confirm currency and monthly versus annual amounts. U.S. tax and loan models should be used within their stated scope.
  2. Prepare Property type, Number of units, Average monthly rent per unit, Vacancy allowance, Operating-expense ratio, Monthly mortgage payment. Defaults demonstrate the model rather than your personal circumstances.
  3. Check the headline result and its components. A key interpretation for this tool is: DSCR barely above 1 leaves little room for rent loss or repairs; a positive number alone is not a sufficient reserve.
  4. Compare the baseline with a changed scenario: The occupancy reference freezes current expenses; an exact break-even analysis would separate fixed and variable costs.

A cash-flow waterfall and scenario sensitivity

Income and costs form successive layers. Subtracting financing before computing NOI changes the definition and distorts cap-rate comparisons. Principal repayment uses cash but can also build equity, so a tax profit, operating profit and cash-flow result may legitimately differ.

Effective income = potential income × (1 − vacancy)
NOI = effective income − operating expenses
Cash flow = NOI − debt service
DSCR = NOI / debt service

The detailed guide adds variable definitions, a reproducible example, a practice question and model limitations.

Keep calculating
Rental property ROI calculatorRental property cash flow calculatorRental property cap rate calculator