Highlights

• Division 296 would add an extra 15% tax on earnings attributable to the portion of a superannuation balance above AUD 3 million.
• The proposal operates through a proportional formula, meaning only a share of earnings is exposed to the additional tax, not the entire balance.
• As balances rise further above the threshold, a larger proportion of earnings becomes subject to the extra tax.
• The treatment of unrealised gains and the lack of threshold indexation remain among the most closely watched aspects of the proposal.

For a generation, the logic of Australian retirement planning has pointed in one direction: contribute to superannuation, let it compound in a low-tax environment, and draw on it tax-free in retirement. The proposed Division 296 super tax does not dismantle that logic, but it does introduce a new variable at the top end that may change how some Australians think about building and holding wealth.

This article explores the behavioural and strategic shift the measure could prompt. Rather than focusing only on the mechanics, it considers how the prospect of an additional tax on the largest balances may influence decisions about contributions, asset location and the very goal of maximising super. The shift is subtle, but for those affected it is real.

Because the proposal has evolved during debate and depends on final legislation, the discussion below is about how thinking may adapt, not a forecast or a recommendation. Investors should confirm the detail with a licensed adviser.

Direct answer: Division 296 may change retirement planning by adding a reason to weigh how much wealth to accumulate inside super against holding it elsewhere, for those with the largest balances. It would apply an extra 15 per cent on earnings attributable to a total superannuation balance above $3 million, assessed individually. The strategic shift is about balance and location of wealth, not abandoning super. As proposed, it has been framed to commence on 1 July 2026, though the start date and design remain subject to final legislation.

Why this matters now

Superannuation's appeal has rested on a stable set of incentives. Division 296 adds a counterweight for high balances, and that counterweight is enough to make some savers pause and reconsider assumptions they have held for years. The significance lies less in the dollars for any single year and more in how it reframes long-term decisions.

The proposal arrives at a moment when many Australians are accumulating wealth rapidly through strong asset markets and consistent contributions. For high earners on a path towards $3 million, the measure introduces a question that did not previously arise: at what point does adding to super stop being unambiguously the most tax-effective choice?

With the framed start date approaching, the conversation is shifting from whether the measure exists to how people should think about it. That makes this a natural time to examine the behavioural dimension rather than only the arithmetic.

Who may be affected

Division 296 targets individuals whose total superannuation balance exceeds $3 million at year-end, aggregated across all funds. The initially affected group is small, commonly cited at around 0.5 per cent of account holders, or tens of thousands of people.

The behavioural effect, however, may reach further than the directly affected cohort. Younger high earners who expect to approach the threshold over time are precisely the people most likely to adjust their planning early. For them, the measure is a signal about the future shape of their strategy, even if it does not touch them today.

The unindexed threshold in the original design reinforces this. If the line does not move with inflation, more people will cross it over the years, which is part of why the strategic rethink extends beyond those at the top right now.

What investors should understand

The mechanics that drive the rethink

Division 296 would apply an additional 15 per cent on the share of earnings attributable to the balance above $3 million, on top of the existing 15 per cent on fund earnings. The taxable share is set by the proportion (TSB minus $3 million) divided by TSB, and the individual is liable, with the option to pay personally or from the fund.

It is this targeted design that shapes the behavioural response. Because the extra tax applies only to earnings on the excess above the threshold, the marginal attractiveness of holding additional wealth in super changes once a balance passes $3 million, while the treatment of amounts below the threshold is unaffected.

Why location of wealth comes into focus

Historically, the question was simply how much to put into super, with the answer often being as much as the caps allowed. Division 296 introduces a second question: where additional wealth is best held once super becomes large. That is the heart of the strategic shift, and it is why advisers increasingly frame planning around the location of wealth, not just its accumulation.

The unrealised gains dimension

The original design measured earnings using year-on-year balance changes, which could capture unrealised gains. For those weighing how to hold growth assets, this feature matters, because it can create a liability before a gain is realised. It is a feature of the original proposal rather than settled law, and one that has shaped how commentators discuss the measure.

From accumulation to allocation: the mindset shift

Perhaps the clearest change Division 296 may bring is a shift in mindset from pure accumulation towards thoughtful allocation. The old default, maximise super, gives way to a more nuanced calculation for those near or above the threshold.

In practice, this means some savers may think harder about whether to keep directing every available dollar into super or to build wealth through other structures once their balance is large. The decision becomes one of balance: retaining the genuine advantages of super for amounts below the threshold while considering alternatives for wealth above it.

Importantly, this is not a rejection of superannuation. For the vast majority, and for the portion of any balance below $3 million, super remains a tax-effective home for retirement savings. The shift is at the margin, for the largest balances, and it is about adding a question rather than reversing the answer.

How planning conversations may change

Advisers report that planning conversations are increasingly forward-looking, modelling not just where a balance is today but where it may be in a decade given growth and contributions. That projection matters more under Division 296, because crossing the threshold changes the marginal calculus.

Conversations may also place more weight on liquidity and the timing of gains, particularly given the original earnings method. A saver holding volatile growth assets inside super might think differently about concentration and realisation than one holding income-producing investments.

Finally, the measure may prompt earlier engagement. Where retirement planning was once something to formalise closer to retirement, the prospect of Division 296 encourages high earners to start the conversation sooner, so that decisions about accumulation and location can be made with a longer runway.

SMSF and managed super fund considerations

The strategic rethink applies regardless of whether wealth is held in a self-managed superannuation fund (SMSF) or a large managed fund, because Division 296 follows the individual. That said, the practical texture differs.

SMSF members, who often hold concentrated or illiquid assets, may find the location-of-wealth question especially pointed. Deciding whether a particular growth asset belongs inside the fund or in an alternative structure carries liquidity and valuation implications that an SMSF trustee must manage directly.

Members of large managed funds face the same conceptual question with the practical mechanics handled within the pooled structure. In both cases, the behavioural shift is the same: weighing accumulation inside super against holding wealth elsewhere once the balance is large.

Possible planning options

Advisers and tax specialists discuss several areas that people sometimes consider as their thinking adapts. These are options people raise, not recommendations, and suitability depends on circumstances and the final law.

• Reviewing the pace and level of voluntary contributions as a balance approaches the threshold.
• Partial withdrawals or recontribution arrangements where eligible.
• Holding some growth assets through alternative structures outside super.
• Family or discretionary trusts as a way some households organise wealth.
• Investment or insurance bonds as a vehicle held outside super.
• Philanthropic or charitable structures for those with giving objectives.

Each carries costs, rules and trade-offs, and none should displace the real benefits super still offers below the threshold. Tailored, licensed advice is essential before acting.

Risks and uncertainties

The foremost uncertainty is the legislation. The proposal has shifted during debate, and the treatment of unrealised gains, the start date and indexation may change. Reshaping a long-term plan around the original design before it is settled carries genuine risk.

There is also a behavioural risk of overcorrection. The strategic shift Division 296 prompts is one of balance, and abandoning super entirely or making drastic changes can forfeit benefits and trigger costs that outweigh the additional tax, which applies only to a portion of earnings on the excess.

And the unindexed threshold means the population rethinking their approach may grow over time. That is a reason to plan thoughtfully, not to act rashly.

What to watch before 1 July 2026

• Whether the earnings calculation keeps the balance-change method or moves to realised gains.
• Any decision to index the $3 million threshold.
• Confirmation of the start date and transitional rules.
• Guidance affecting how growth assets are valued and assessed.
• Detail on electing to pay the tax personally or from the fund.