The Universal Calculation Engine
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The Universal Calculation Engine

Cash Flow

Scheduled inflows and outflows each month—before appreciation stories.

Start this lessonWhat net operating income means before the mortgage

Landlord math

Gross rent is not spendable. Subtract mortgage, taxes, insurance, maintenance, management, and a vacancy allowance. What remains is operating cash flow before taxes.

Why reserves matter

One empty month or a water heater can erase half a year of “profit” on paper. Cash flow positive means surviving those months without panic selling.

Model debt service

Mistakes

  • Assuming 100% occupancy forever.
  • Skipping capex reserves because “the inspection looked fine.”

Use the calculator

FAQ

Is appreciation cash flow?

No—it is hypothetical until you sell or borrow against equity, both with costs and risk.