Investment Property Cashflow Calculator

Stress-test your rental income against real running costs and mortgage repayments to find your true cashflow.

The HLF Investment Cashflow Calculator

Stress-test your real-world expenses and mortgage structure to find your true cashflow.

Income & Finance
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Property Running Costs
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Interest Only
Principal & Interest
Expected Net Cashflow (Before Tax)
+$200
Cashflow Breakdown
Category
Property Investors
Budgeting
Information

When analyzing a potential investment property, it is easy to get blinded by a great marketing flyer. Real estate agents love to talk about gross rental yield because it makes a property look incredibly profitable on paper.

But yield won't pay your mortgage, and it won't save you if your tenants move out.

To build a sustainable property portfolio in New Zealand, you must look at Net Cashflow. This is the exact amount of cold, hard cash that will either enter your bank account or be drained from it every single year after every single operating expense is paid.

Use our interactive cashflow calculator below to stress-test your expected numbers. Toggle between interest-only and principal-and-interest structures to find the exact configuration that keeps your investment safe and scalable.

Run Your Numbers: The HLF Cashflow Visualizer

  • Step 1: Enter the expected weekly rent and your total proposed investment loan balance.
  • Step 2: Account for local council rates, landlord insurance, and a realistic annual maintenance fund.
  • Step 3: Switch between repayment structures to see exactly how your annual maths shifts.
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FAQS

Investment Property Cashflow

What is the difference between rental yield and cashflow?

Rental yield is a high-level percentage showing the relationship between annual rental income and the property's purchase price. Cashflow is the actual dollar amount left over after deducting all running expenses, property management fees, and mortgage repayments from that rental income. Yield is an asset metric; cashflow is a bank account reality. (Calculate high-level snapshots first using our standalone [Property Rental Yield Calculator])

Why do NZ investors choose interest-only mortgages?

New Zealand property investors frequently use interest-only mortgages to preserve cashflow and maximize capital efficiency. By keeping mortgage outgoings to the absolute minimum, investors retain more liquid cash to support the holding costs of the property or to fund the deposit on their next investment purchase.

Is negative gearing a good investment strategy in NZ?

Negative gearing means your property costs more to run than it earns in rent, resulting in a net cashflow loss. While some investors accept short-term negative cashflow in exchange for long-term capital growth, a heavily cashflow-negative property reduces your borrowing power with banks and limits your ability to scale a portfolio.

How much should I set aside for property maintenance in NZ?

As a standard rule of thumb, property investors should budget between 0.5% and 1% of the property's total value annually for maintenance on an existing standalone home. Older homes may be a little more than this. For modern townhouses or new builds, this provision can typically be safely scaled down to 0.2% to 0.5% for the first few years of ownership.

Expert advice for your home loan, KiwiSaver, and beyond.