Understand cash flow before you invest in property

Oliver Holcombe • January 15, 2024

Understanding cash flow

Understanding cash flow can be the difference between a solid long-term investment and a costly mistake, writes Michael Sloan. So do your research – and get good advice before you buy.

What is negative cash flow?

Oftentimes investment properties generate negative cash flow. That means, you must put money in each year to cover the difference between the total cost of the property (interest repayments, rates, insurance, maintenance, etc.) and the total income (rent and tax breaks). Investors are happy to do this because they expect a long-term profit. Over time the rental increases that go in hand with inflation should mean this ‘top-up’ is no longer needed.

Unfortunately, some investors don’t know what the cash flow of their property is before they buy. They don’t realise something’s wrong until their cash flow dries up and they get the bad news from their financial advisor. So seek advice from your accountant before you buy, not after. Always do the numbers first.

Miscalculating cash flow

It’s easy to miscalculate cash flow. Your estimated rental income might be over-optimistic, and you might also assume full occupancy (52 weeks a year). You might also underestimate maintenance costs or insurance.

Investors who get the cash flow of their property wrong can quickly run into problems. They either have to raise extra cash to prop up their property each month (potentially putting them under great financial stress), or sell. Selling property under pressure is never ideal and these investors can lose a lot. Sadly, this is a common mistake.

Work out your cash flow

To understand the cash flow on a potential investment property, get your accountant to do the numbers for you (if they can’t, get a new accountant). The number one rule is: ‘Don’t buy a property without knowing what the cash flow is’.

Make sure your accountant has all the costs of holding the property, including rates, body corporate fees, insurance and property management fees. They can work out the interest, estimate depreciation and give you an idea of the cash flow for the property. Have the property inspected and if possible see if you can check body corporate records, if needed. This could help you find out about any big maintenance or structural repairs planned.

If buying that property will put strain on your finances, then find a property with better cash flow. Also, when doing your figures, factor in possible interest rate rises and potential vacancies.

When the company selling you a property provides a cash flow report, don’t take it as gospel. The figures can always be manipulated, so get your accountant to work through them.

Your key to staying financially safe? Understand the cash flow before you buy.

A tip about tax

If you think you’ll have a net rental loss (i.e. your deductions, including interest, depreciation and capital allowances exceed your rental income), you can improve your cash flow by applying to the Australian Tax Office (ATO) for a PAYG withholding variation. If the variation is approved, you may be able to reduce the tax taken out from each wage packet, rather than waiting till the end of the year to get a tax refund. 

Speak to us for more information. 

Source:  NAB
Reproduced with permission of National Australia Bank (‘NAB’). This article was originally published at https://www.nab.com.au/personal/life-moments/home-property/invest-property/cash-flow
National Australia Bank Limited. ABN 12 004 044 937 AFSL and Australian Credit Licence 230686. The information contained in this article is intended to be of a general nature only. Any advice contained in this article has been prepared without taking into account your objectives, financial situation or needs. Before acting on any advice on this website, NAB recommends that you consider whether it is appropriate for your circumstances.
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By Nikki Ashurst • November 2, 2026
Many Australians don't know how their super fund has performed or what it invests in. Are you one of them? Here's what to check and why it matters. Do you know how your super fund performed over the last two years? Many Australians don’t and are working towards their financial future without fully understanding one of their most important assets and without a clear plan for how their super may support them in retirement. That's not surprising, as many people view super as something that should run quietly in the background while they're busy with careers, families and everything else that life throws at them. But when you’re not sure what’s happening behind your balance, it’s harder to know whether you’re on track, whether your current approach reflects your goals or what opportunities might be available to help you make the most of what you’ve built so far. 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The trouble is that a return figure means nothing without context: What it's being compared to Growth and conservative options invest differently and with different levels of risk. Compare like with like or the comparison may not be genuine. The comparison period A single year can be heavily influenced by short term market conditions. Super is measured in decades, so five, seven and ten year returns tell you far more about whether a fund is consistently doing its job, albeit not a predictor of future performance. Fees and tax Published returns should reflect investment fees, costs and tax but administration fees may be charged separately from your balance. Two funds quoting the same return can leave you in meaningfully different places once all fees are accounted for. Then there are the things that returns can't show you at all. For example, what insurance is attached to your account and what it's costing you, whether the fund offers guidance, tools and advice or simply sends a statement once a year. Another consideration maybe the level of support available when you need it. When comparing funds, it's worth looking at the full picture, including performance, fees, investment options, retirement support and member benefits. What today’s decisions mean tomorrow To understand how your super stacks up, start here: Find your investment option It's on your annual statement and in your online account. Look at what's in it Your fund publishes the asset allocation (shares, cash etc.) for each investment option. Check the long-term return for that option Focus on five and ten year returns, not just last year and compare them with equivalent options. Understand the total cost Add together administration fees, investment fees and insurance premiums as an annual dollar figure. Comparing super is about working out which option will perform best for you. Before you jump in, it’s worth understanding what's behind the numbers so you can make decisions based on more than a headline return. Knowing where you stand is the first step A super balance tells you where you are today. Understanding how your super is invested, how it compares and whether it's aligned with your goals helps show whether you're heading in the right direction. Source: MLC The information in this article does not take into account your objectives, needs and circumstances. We recommend that you obtain investment and taxation advice specific to your investment objectives, financial situation and particular needs before making any investment decision or acting on any of the information contained in this document. Subject to law, Capstone Financial Planning nor their directors, employees or authorised representatives gives any representation or warranty as to the reliability, accuracy or completeness of the information; or accepts any responsibility for any person acting, or refraining from acting, on the basis of the information contained in this document. Principal Wealth Management Pty Ltd trading as BMO Financial Solutions ABN 53 109 336 601 is a Corporate Authorised Representative (CAR 277821) of Capstone Financial Planning Pty Ltd ABN 24 093 733 969 Australian Financial Services Licence (AFSL) No. 223135.
By Jude Schofield • October 7, 2026
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