Save
Why investors could unknowingly be heading towards a CGT minefield
The calculation of a capital gain (or loss) should be simple. Unfortunately, it’s becoming more and more complicated, not because the information required to calculate the gain (or loss) has changed, but because the details of information have increased, writes Ben Johnston.
Why investors could unknowingly be heading towards a CGT minefield
The calculation of a capital gain (or loss) should be simple. Unfortunately, it’s becoming more and more complicated, not because the information required to calculate the gain (or loss) has changed, but because the details of information have increased, writes Ben Johnston.
This is mainly due to the large uptake by investors participating in Dividend Reinvestment Plans (DRP’s) combined with the simplicity of retail trading platforms that allow mum and dad investors to trade freely and frequently at their will.
Calculating the capital gain (or Loss) on the disposal of assets should in most instances be a relatively simple calculation. You take the cost base (purchase price plus costs such as brokerage fees) away from the sale price (less costs such as brokerage fees) and you have the gain (or loss) made on the sale. Depending on whether you have held the asset for over 12 months or not, you may be eligible for a discount of 50% of the gain.
The gain you make is then added to your taxable income and taxed at your marginal rate of tax.
The issue that many investors and their tax advisers are facing is the volume of capital gains calculations that are required when a client disposes of their investments, particularly if they have held their shares for a long period of time and participated in DRPs along the way.

Add on the possibility that the company they invested in many years ago was involved in a de-merger, a takeover or a capital restructure. This creates a very complicated situation when calculating the capital gain.
The Australian Taxation Office (ATO), through its sophisticated data matching program, has up-to-date information on when taxpayers dispose of their shares. Even before you go to lodge your tax return, the ATO has the date, amount and quantity of shares sold in that financial year.
What they do not have is the date of when these shares were acquired, so unless you have accurate records of your acquisitions, it can lead to one of two scenarios, each very dangerous in their own regard. You could either overpay tax by understating your cost base (not ideal) or you underpay tax which can lead to ATO scrutiny plus fines and penalties.
Take a quick example, Joe Bloggs sells 1,000 IAG shares. Joe acquired 500 of these shares when NRMA first floated in the year 2000, and since then he has participated in the DRP and hence, on average, has purchased two new parcels of shares each year. For one sale of 1,000 shares, Joe has now over 40 individual CGT calculations to make as each time he acquired new shares, a new cost base was created.
Take Joe’s simple sale of his 1,000 shares and add on multiple shareholdings across many companies and the volume of calculations increases remarkably. Add on other complications such as death, moving house, computers crashing, marriage breakdown, changing trading platforms and losing documents – you have a scenario that becomes frightening for those left to calculate the capital gains liability.
Imagine an investor that has 20 different shareholdings all participating in DRPs and they hold these shares for 40 years. It’s a minefield requiring possibly hundreds of capital gains calculations.
To avoid this nightmarish scenario, investors are advised to:
1. Keep an ongoing spreadsheet of all shares/investments purchased, including shares acquired under a DRP.
2. Always file records of share purchases, whether it be electronic or paper copy.
3. Keep these records for as long as you own these assets, the five-year substantiation rule for keeping records does not apply to these types of transactions.
4. Provide your adviser and/or lawyer with details of your investments so in the case of your death or the documents are misplaced, the information required by your beneficiaries is more readily available.
Ben Johnston, managing director of Johnston Advisory
About the author
About the author
Tax saving
$20,000 instant asset write-off extension welcomed, but calls for broader support grow
The Australian government's decision to extend the $20,000 instant asset write-off into the next financial year has been met with approval from business leaders. However, there are growing calls for ...Read more
Tax saving
The downsizer dividend: How targeted tax levers could unlock housing supply in Australia
A call by Raine & Horne to incentivise seniors to move to smaller homes has kicked off a wider policy conversation that reaches well beyond real estate. If designed well, a targeted package could ...Read more
Tax saving
Raine & Horne's bold move could unlock housing supply but what are the hidden risks
Raine & Horne’s call for targeted tax incentives to encourage empty nesters to ‘rightsize’ isn’t just another sector wish list; it’s a potential lever to free up family homes, ease rental ...Read more
Tax saving
From annual check-ups to always‑on: how modern portfolio reviews unlock after‑tax alpha
The era of once‑a‑year portfolio check‑ins is over. Continuous, tech‑enabled reviews now drive returns through tax efficiency, risk control and behavioural discipline—especially in a high‑rate ...Read more
Tax saving
Navigating tax laws for capital gains in 2023
The landscape of Australian tax laws surrounding capital gains is ever-changing, with 2023 being no exception. Read more
Tax saving
What you need to know about the tax implications of crypto
One million Aussies are now invested in crypto, but many have not thought about how these investments will affect them at tax time. Read more
Tax saving
Welfare overhaul could give recipients a leg-up
Australia’s Centrelink recipients who’ve been doing it tough are in for a potentially easier time if the federal government pursues ambitious reforms that could provide sturdier safety nets. Read more
Tax saving
Students should think twice before tapping into their super
Former students might want to think carefully before they look to take advantage of the federal government’s biggest first home buyer incentive. Read more
Tax saving
$20,000 instant asset write-off extension welcomed, but calls for broader support grow
The Australian government's decision to extend the $20,000 instant asset write-off into the next financial year has been met with approval from business leaders. However, there are growing calls for ...Read more
Tax saving
The downsizer dividend: How targeted tax levers could unlock housing supply in Australia
A call by Raine & Horne to incentivise seniors to move to smaller homes has kicked off a wider policy conversation that reaches well beyond real estate. If designed well, a targeted package could ...Read more
Tax saving
Raine & Horne's bold move could unlock housing supply but what are the hidden risks
Raine & Horne’s call for targeted tax incentives to encourage empty nesters to ‘rightsize’ isn’t just another sector wish list; it’s a potential lever to free up family homes, ease rental ...Read more
Tax saving
From annual check-ups to always‑on: how modern portfolio reviews unlock after‑tax alpha
The era of once‑a‑year portfolio check‑ins is over. Continuous, tech‑enabled reviews now drive returns through tax efficiency, risk control and behavioural discipline—especially in a high‑rate ...Read more
Tax saving
Navigating tax laws for capital gains in 2023
The landscape of Australian tax laws surrounding capital gains is ever-changing, with 2023 being no exception. Read more
Tax saving
What you need to know about the tax implications of crypto
One million Aussies are now invested in crypto, but many have not thought about how these investments will affect them at tax time. Read more
Tax saving
Welfare overhaul could give recipients a leg-up
Australia’s Centrelink recipients who’ve been doing it tough are in for a potentially easier time if the federal government pursues ambitious reforms that could provide sturdier safety nets. Read more
Tax saving
Students should think twice before tapping into their super
Former students might want to think carefully before they look to take advantage of the federal government’s biggest first home buyer incentive. Read more
