How to use this calculator
- Enter annual net operating income, annual principal and interest payments, annual capital reserve.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Cash flow = NOI − debt service − capital reserve.
Assumptions and limitations
The reserve is a cash-planning allocation; taxes, appreciation and sale proceeds are excluded.
Worked example
With annual net operating income = 20000, annual principal and interest payments = 12000, annual capital reserve = 2000, annual rental cash flow is approximately 6000.
What the result means
Debt principal consumes cash even though it is not an operating expense in NOI.
Common questions
How should I interpret annual rental cash flow?
Debt principal consumes cash even though it is not an operating expense in NOI.
What should I check before using this result?
The reserve is a cash-planning allocation; taxes, appreciation and sale proceeds are excluded.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.