How to Calculate Property Cash Flow

24.10.26

How to Calculate Property Cash Flow

Himak – Property Folio AI author

Author:Himak

How to Calculate Cash Flow on an Investment Property

Cash flow is the money left over, or the shortfall, after a property’s income and costs are taken into account. It decides how comfortably you can hold a property and whether you can afford the next one. Here is how to work it out.

The Basic Formula

Annual cash flow = rental income − (loan repayments + ongoing expenses)

If the result is positive, the property puts money in your pocket. If it is negative, you need to top it up from other income.

Income to Include

  • Rent received (allow for vacancy weeks)
  • Any other income, such as parking or storage fees

Costs to Include

  • Loan repayments (interest, plus principal if principal and interest)
  • Council rates and water
  • Strata or body corporate fees
  • Landlord insurance
  • Property management and letting fees
  • Repairs and maintenance
  • Land tax, where it applies

A Worked Example

Rent: $580 per week × 50 weeks (allowing 2 vacant weeks) = $29,000.

Interest-only repayments: $26,000. Other expenses: $8,500.

Cash flow = $29,000 − ($26,000 + $8,500) = −$5,500 a year, or about −$106 a week before any tax effects.

Pre-tax vs After-tax Cash Flow

The example above is pre-tax. After-tax cash flow also considers deductions such as depreciation and the tax effect of any net rental loss. That depends on your personal situation, so it is worth reviewing with your accountant.

Watch It Across the Whole Portfolio

One property with a small shortfall may be fine. Several negative properties together can stretch your budget, especially when interest rates move. Tracking cash flow at portfolio level shows the full picture.

Track this automatically with Property Folio AI

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Frequently Asked Questions

What is a cash flow positive property?

One where rental income is higher than all holding costs, including loan repayments, so it produces a surplus.

Should I include principal repayments in cash flow?

Yes, for cash flow. Principal is cash leaving your account even though it builds equity rather than being an expense.

How do interest rate changes affect cash flow?

Higher rates increase repayments, which reduces cash flow. Even a small rise can matter across several properties.

This article is general information only and is not financial, tax or legal advice. Consider speaking with a licensed professional about your circumstances.

How to Calculate Property Cash Flow How to Calculate Property Cash Flow

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