Capital Gains
Capital gains tax (CGT) is one of the most significant taxes affecting investment returns. Understanding and implementing effective CGT strategies can save thousands of dollars and significantly improve after-tax returns.
This comprehensive guide covers all aspects of capital gains tax, from basic concepts to advanced strategies including parcel apportionment, cost base adjustments, the CGT discount, loss management, principal place of residence rules, and mixed-use asset considerations.
Mastering these strategies requires understanding the rules, timing considerations, and how different approaches can be combined for maximum tax efficiency.
CGT Impact on Returns
| Investment Return | Without CGT Planning | With CGT Planning | Tax Saving |
|---|---|---|---|
| $10,000 | $5,300 | $7,650 | $2,350 |
| $50,000 | $26,500 | $38,250 | $11,750 |
| $100,000 | $53,000 | $76,500 | $23,500 |
| $500,000 | $265,000 | $382,500 | $117,500 |
Based on 47% marginal tax rate with 50% CGT discount
Parcel Apportionment
Parcel apportionment is a tax deferral strategy that allows you to choose which purchase parcel of shares or units to sell. While you'll eventually pay tax on the total gain from purchase to sale price, choosing which parcel is sold can increase or decrease your tax owing for that year.
In general, you want to delay tax payments to maximize the time value of money. However, if you have a low-income year with unused tax brackets, you might want to realize higher gains to utilize those brackets and save lower-gain parcels for future years.
Parcel Apportionment Methods
- Average Price: Uses average cost across all parcels
- FIFO (First In, First Out): Sells oldest shares first
- LIFO (Last In, First Out): Sells newest shares first
- Low Cost First: Sells shares with lowest purchase price first
- High Cost First: Sells shares with highest purchase price first
Parcel Apportionment Example
Portfolio Holdings:
- 100 shares @ $10.00 (5 years ago)
- 100 shares @ $15.00 (3 years ago)
- 100 shares @ $20.00 (2 years ago)
- Current price: $25.00
Selling 100 shares:
| Method | Cost Base | Gain | Tax |
|---|---|---|---|
| Average Price | $15.00 | $1,000 | $235 |
| FIFO | $10.00 | $1,500 | $353 |
| Low Cost | $10.00 | $1,500 | $353 |
| High Cost | $20.00 | $500 | $117 |
Tax calculated at 47% marginal rate with 50% CGT discount
Cost Base Adjustments
The capital gains on an asset is the difference between the cost base and the selling proceeds.
Cost Base is the buy price plus expenses related to purchasing (e.g., stamp duty, legal fees, brokerage, building reports), plus any cost base adjustments.
Selling Proceeds is the selling price less expenses related to the sale (e.g., agent fees, advertising, legal fees, marketing).
Cost base adjustments increase (or decrease) the effective buying price during the ownership of the asset.
Depreciation & Capital Works
Capital works increase the cost base of your asset (and thus reduce tax payable on sale), they are not a deductible expense.
Depreciation is the gradual deduction of capital works (both works you completed, and works completed by previous owners of the asset). This acts as both a deferral of tax, and a reduction of tax as the capital gain can utilise the CGT discount. However there can be a downside as usually the capital gain occurs all in one year so you're faced with higher marginal tax rate in that year. If you're earning over $45k taxable income there is no downside.
AMIT Cost Base Adjustments
ETFs and managed funds distribute earnings to unit holders, but they are not required to distribute the cash at the same time. If they distribute less cash than they should have this is classed as a shortfall and will increase your cost base. It has the same effect as dividend re-investment on your cost base without actually creating a new transaction. It's important that you retain every tax statement to use on your final cost base calculation.
Cost Base Examples
Example 1: Share Purchase & Sale
| Event | Purchase | Adjustment | Sale |
|---|---|---|---|
| Buy | -$10,000 | ||
| Brokerage | -$50 | ||
| Sale | $15,000 | ||
| Brokerage | -$50 | ||
| Total | -$10,050 | $0 | $14,950 |
| Capital Gain: $4,900 | |||
Example 2: Property Purchase, Capital Works & Sale
| Event | Purchase | Adjustment | Sale |
|---|---|---|---|
| Land | -$300,000 | ||
| Building | -$200,000 | ||
| Stamp Duty | -$15,000 | ||
| Building Report | -$500 | ||
| Legal | -$2,000 | ||
| Capital Works | -$30,000 | ||
| Building Depreciation | $8,000 | ||
| Works Depreciation | $6,000 | ||
| Sale | $650,000 | ||
| Agent Fees | -$19,500 | ||
| Legal | -$1,500 | ||
| Total | -$517,500 | -$16,000 | $629,000 |
| Capital Gain: $95,500 | |||
Example 3: ETF with AMIT Adjustments
| Event | Purchase | Adjustment | Sale |
|---|---|---|---|
| ETF Units | -$20,000 | ||
| Brokerage | -$20 | ||
| Year 1 AMIT Shortfall | -$500 | ||
| Year 2 AMIT Excess | $200 | ||
| Year 3 AMIT Shortfall | -$300 | ||
| Sale | $25,000 | ||
| Brokerage | -$25 | ||
| Total | -$20,020 | -$600 | $24,975 |
| Capital Gain: $4,355 | |||
CGT Discount - 12 Month Rule
The CGT discount provides a reduction in tax on capital gains for assets held longer than 12 months. The discount rate varies depending on the entity type holding the asset.
Assets must be held for more than 12 months from acquisition date to disposal date. The holding period starts from acquisition date and disposal date is when the contract is signed. Even one day short can cost you the discount.
This applies to assets acquired after 21 September 1999 and is one of the most valuable tax minimisation strategies available.
Because companies receive no discount, you can think of it as if they do, but their tax rate is double at 60%. As a result you would in general never distribute capital gains to a company which could receive the discount when distributed to an individual or trust.
Small Business CGT Concessions do receive a capital gain discount for active business assets (e.g. machinery) held for over 15 years.
CGT Discount Rates by Entity
| Entity Type | Discount Rate |
|---|---|
| Individuals | 50% |
| Trust | 50% |
| Businesses | 0% |
| Super | 33.3% |
CGT Losses
Capital losses can be used to offset capital gains before applying the CGT discount. When approaching end of financial year you can review your current asset valuations and consider selling loss position assets to reduce your tax for that year.
- Capital losses offset current year capital gains first
- Unused losses can be carried forward indefinitely
- Losses cannot be used to offset other income types
- Must be realized losses (not paper losses)
- Wash sale rules prevent artificial loss creation through quick buy/sell transactions
Loss Offsetting Example
| Scenario | Gains | Losses | Net Gain | Tax |
|---|---|---|---|---|
| No Losses | $50,000 | $0 | $50,000 | $11,750 |
| With Losses | $50,000 | $20,000 | $30,000 | $7,050 |
| Tax Saving | - | - | - | $4,700 |
Based on 47% marginal rate with 50% CGT discount
Principal Place of Residence (PPR)
Your principal place of residence is generally exempt from CGT, making it one of the most tax-effective investments. Each individual gets to choose which property they class as their PPR; but for every day you can only have one. The 100% tax discount is applied proportionally based on the number of days the asset is classed as your PPR on your share of ownership.
You must legitimately live in the property or intend on living in the property for it to be able to be classed as your PPR.
If you move out of your home you can continue to class it as your PPR for 6 years; even if you rent it out during that period.
If you buy a new property before selling your old one, both can be treated as your main residence for up to 6 months.
As a couple you can have one property as a full PPR or two properties as half PPR each.
You do not need to make the election of PPR until you sell a property. To defer tax you would generally class the first property you sell as your PPR for the whole period. But depending on the gains on each property and the time between selling each asset this can differ.
Mixed Use Home
When a property changes from private use to income-producing use, special rules apply to determine the cost base and potential CGT implications.
When you eventually sell it you can make one of three choices:
- 6-year Rule: Use the 6 year rule to continue to class it as PPR, but means your other property cannot.
- Basic: Time & Use Apportionment PPR vs Income Producing over the total gain
- First Income: Time & Use apportionment PPR vs Income producing over the gain after the first time you generated income
You don't need to decide which method to use until you sell the property. However to be able to use the First Income rule you MUST get a valuation and records of similar house sales at that time from an agent or valuer. Therefore it is always best to get a valuation before you rent your home out for the first time. If you rent it out first you cannot use the first income rule.
Notice in the example that after you apply the first used to produce income rule the selling costs are completely deducted from the sale price. As a result if the gain that occurs in the year after moving out and renting the property does not exceed the selling costs, it is tax effective to do so.
Mixed Use Example
Scenario:
Two equal story home that could rent out the top floor, purchased for $1m, which increased in value in year 1, then dropped and only recovered by year 3 when you sold it:
- Year 1: You and children occupied entire home
- Year 2: Lived downstairs, rented out top floor
- Year 3: Moved out, rented entire house
PPR Calculations:
| Year | Property Value | Transaction Costs | PPR% | Basic | First Income |
|---|---|---|---|---|---|
| 0 | $1,000 | $50 | - | 50% PPR | 100% PPR |
| 1 | $1,200 | - | 100% | 25% PPR | |
| 2 | $1,100 | - | 50% | ||
| 3 | $1,200 | $50 | 0% |
Financial Example:
| Year | Basic Method | First Income Method | ||||||
|---|---|---|---|---|---|---|---|---|
| Event | Value | Gain | Reportable | Event | Value | Gain | Reportable | |
| 0 | Buy | $1,050 | - | - | Buy | $1,050 | - | - |
| 1 | - | - | - | - | Sell | $1,200 | $0 | $0 |
| 2 | - | - | - | - | - | - | - | - |
| 3 | Sell | $1,150 | $50 | $25 | Sell | $1,150 | -$37 | -$37 |
| Total | - | - | $50 | $25 | - | - | -$37 | -$37 |
Reportable Income:
- 6 year Rule: $0
- Basic: $25
- First Income: -$37 (best)
FAQ
From the contract date you buy to the contract date you sell (settlement dates don't control the 12-month test).
Yes, but be consistent within each sale and keep clear records showing which units/shares you sold.
Every DRP issue is a new parcel with its own cost base and date, so it can change which parcels you'll want to sell.
Buy/sell costs (brokerage, stamp duty, legal, reports), and capital improvements. Routine repairs and maintenance are usually not added—they're deductions (if eligible) in the year you pay them.
Yes. If you claim (or could have claimed) capital-works deductions, those reduce your cost base when you sell—even if a prior owner did the works.
No, not for most assets (shares/property). Interest is generally treated separately (deduction if eligible), not added to cost base.
That's just how the rules work: individuals and trusts may get it; companies don't. Instead, companies pay the company tax rate and then distribute franked dividends to shareholders.
They're different tools (active-asset concessions with their own tests). You might access both in some cases, but they're not the same as the standard 50% discount.
Usually no—as a couple you generally get one main-residence exemption between you (or you split days/percentages across the two).
You can keep treating it as your main residence for up to 6 years while it earns income—but not for the same days you claim another home as your main residence.
You can only claim 2ha as your main residence, you need to keep records of the value of the 2ha portion and the entire property.
On (or very near) the day you first rent any part of the home. You'll want a report (or strong comparables) for that date to support the market-value reset.
You can still seek a retrospective valuation, but it's harder to substantiate. Getting it contemporaneously is best.
Use a reasonable basis (typically floor area and days) for each period: private %, rented %, and portion any common areas.
No. The method needs a period where it was your main residence first, then it started producing income.
Before. You can choose which capital gains events the losses are applied to; so generally apply the to gains which cannot be discounted first. Apply the discount to any remaining net capital gain that's eligible.
Yes—indefinitely (but they only offset capital gains, not salary/wages).
Selling purely to crystallise a loss and buying back the same (or substantially identical) asset straight away may be denied under anti-avoidance rules—leave a meaningful gap and/or change exposure.
Not by itself. It increases your cost base (the flip side: a net decrease reduces your cost base). Keep every annual tax statement so your eventual gain/loss is right.
Treat DRP units as new parcels; AMIT increase/decrease amounts still adjust the cost base per unit across the holding.
Return of capital: usually reduces cost base.
Split/consolidation: adjust units and per-unit cost base but not the total.
Demerger: cost base is apportioned between the old and new holdings per the demerger notice.
Convert amounts at the relevant dates (buy, sell, and certain adjustment dates). Don't just convert the final gain.
Contracts, invoices, valuation reports, AMIT/tax statements, DRP notices, and notes on private/rented floor-area splits. Keep them for at least 5 years after you lodge the return for the sale year (longer if losses carry forward).
How to track Capital Gains with SelfManaged
Record all asset purchases and sales with dates to track holding periods and calculate CGT implications. SelfManaged helps you optimize timing and parcel selection.
Monitor your capital gains and losses to plan optimal timing of asset sales and maximize tax benefits through strategic loss harvesting.
Track cost base adjustments and parcel apportionment to ensure you're maximizing your cost base and minimizing capital gains tax.