For many self-managed super fund trustees, the single largest tax event in the life of the fund is not a year of dividends or rent, but the day a long-held asset is finally sold. A property or share parcel bought decades ago can carry an enormous embedded capital gain, and when that gain is crystallised the tax outcome hinges on one deceptively simple question: what phase was the fund in at the moment of sale? Because a complying SMSF can be taxed anywhere from an effective 10 per cent down to nothing at all on the same gain, the timing of a disposal relative to commencing a pension can change the result dramatically. Understanding the general principles matters long before any sale button is pressed.

 

How capital gains are taxed inside an SMSF

A complying self-managed super fund in accumulation phase pays 15 per cent tax on its earnings. Capital gains are treated a little differently. Where the fund has held an asset for more than 12 months, it qualifies for a one-third (33.3 per cent) CGT discount. Applying that discount to the 15 per cent rate produces an effective rate of about 10 per cent on the gain.

The 12-month holding rule is central. An asset sold at or before the 12-month mark receives no discount, so the full gain is taxed at 15 per cent. Cross the 12-month threshold and only two-thirds of the gain is assessable, which is why the Holding Period is one of the most important dates in an SMSF’s records. The clock generally runs from the contract date of Acquisition to the contract date of disposal, not settlement.

 

Why the retirement phase changes everything

The picture shifts once Assets move into the retirement phase to support an account-based pension. Earnings on assets supporting a retirement-phase income stream are Exempt Current Pension Income (ECPI) and are taxed at 0 per cent. That exemption applies to both ordinary income and capital gains. In other words, a Capital Gain realised on assets supporting a pension can attract no tax at all, rather than the effective 10 per cent that would apply in accumulation.

This is the crux of SMSF capital gains strategy. The same asset, the same gain, and the same Trustee can produce a materially different tax bill depending on whether the disposal occurs while the supporting capital sits in accumulation or in retirement phase.

 

The transfer balance cap constraint

The retirement phase is not unlimited. Each person has a transfer balance cap that limits how much can be moved into the tax-free retirement phase across all of their superannuation. The general cap was $2 million in 2025–26 and was indexed to $2.1 million from 1 July 2026. Amounts above a member’s personal cap cannot support a retirement-phase pension and generally remain in accumulation, where earnings and gains continue to be taxed at 15 per cent (an effective 10 per cent on discounted gains). A large, concentrated capital gain may therefore sit partly inside and partly outside the tax-free environment, depending on how much cap space a member has.

 

A hypothetical illustration

Consider a hypothetical example for illustration only. Jarrah, aged 62, holds a parcel of shares inside his SMSF that he bought many years ago for $200,000, now worth $500,000 — an unrealised gain of $300,000. The shares have been held for well over 12 months.

If the shares were sold while wholly supporting accumulation, the one-third discount would reduce the assessable gain to $200,000, taxed at 15 per cent — around $30,000, an effective 10 per cent on the full gain.

If, instead, the same shares were sold while supporting a retirement-phase pension and within Jarrah’s transfer balance cap, the gain could fall within ECPI and be taxed at 0 per cent. This example ignores franking credits, other fund income, expenses and the interaction of the proportionate ECPI method, and is not a recommendation to act in any particular way.

 

Risks, compliance and what trustees weigh up

Timing a disposal is never a purely tax exercise. Investment risk does not pause while a member waits to commence a pension; a concentrated holding could fall in value, wiping out any tax benefit of waiting. Commencing a pension also triggers minimum drawdown obligations and requires the member to have met a condition of release, such as retiring after age 60 or reaching age 65. The way ECPI is calculated — whether by the segregated or proportionate method — also affects how much of a gain is actually exempt, and larger funds may find only a proportion of a gain is covered.

There are also anti-avoidance and administrative considerations, and capital losses interact with gains in ways that can alter the arithmetic. A fund carrying forward prior-year capital losses can apply them against a realised gain before the discount is worked out, which changes the effective outcome again. These are matters where the general principles quickly meet the specific facts of a fund.

Timing is further complicated by the fact that a member must actually satisfy a condition of release — such as retiring after age 60, ceasing an employment arrangement after 60, or reaching age 65 — before a retirement-phase pension can begin. An asset cannot simply be shifted into the 0 per cent environment on a whim; the member’s personal circumstances, the fund’s cap space and its ECPI method all have to line up. For that reason, the interplay between a sale date and a pension commencement is best understood as a set of general principles rather than a fixed formula that applies uniformly to every trustee.

 

Key Takeaway

Inside a complying SMSF, a capital gain on an asset held more than 12 months is taxed at an effective 10 per cent in accumulation phase after the one-third CGT discount, but can be taxed at 0 per cent when the asset supports a retirement-phase pension. The transfer balance cap — $2 million in 2025–26, indexed to $2.1 million from 1 July 2026 — limits how much can enjoy the 0 per cent environment. The timing of a sale relative to commencing a pension, and the 12-month holding rule, can therefore make a large difference to the tax outcome. These are general principles, not a recommendation about any individual’s circumstances.