Highlights

• Division 296 proposes an additional 15% tax on earnings attributable to the portion of a superannuation balance above AUD 3 million.
• The measure would be assessed at the individual level using a person's total superannuation balance across all funds.
• The original design could include unrealised gains in the earnings calculation, a feature that has attracted significant debate.
• The absence of indexation for the AUD 3 million threshold could expand the number of affected investors over time.

Few changes to Australia's retirement system have generated as much discussion among investors and their advisers as Division 296. The measure, designed to apply an additional layer of tax to very large superannuation balances, has prompted detailed questions about how the numbers actually work, who falls within its reach, and how the design might evolve before it takes effect.

This explainer walks through the mechanics in plain terms. It sets out what Division 296 proposes to do, how the extra tax is calculated, why the treatment of unrealised gains has attracted attention, and the consequences of leaving the $3 million threshold unindexed. The aim is to give wealthier Australians and those approaching the threshold a clear, calm understanding of the proposal rather than a reason for alarm.

Throughout, it is worth keeping in mind that the policy has shifted during debate and that its final form depends on legislation. Where the detail matters, investors should confirm the final position with a licensed professional.

Direct answer: Division 296 is a proposed measure that would apply an additional 15 per cent tax on the share of superannuation earnings attributable to an individual's total superannuation balance above $3 million. It operates at the individual level, sits on top of the existing 15 per cent tax on fund earnings, and is calculated using the proportion of a balance that exceeds the threshold. As proposed, it has been framed as commencing on 1 July 2026, though the start date and design remain subject to final legislation.

Why this matters now

Superannuation has long been treated as one of the most tax-effective ways to accumulate and hold long-term savings in Australia. Concessional contribution caps, a low headline rate on fund earnings and tax-free pension treatment in retirement have all encouraged Australians to build wealth inside the system. Division 296 represents a meaningful adjustment to that long-standing settlement for a small group at the top.

The relevance is not limited to those who already hold more than $3 million. Because the threshold is not indexed in the original design, balances that sit comfortably below the line today could cross it over a working lifetime through investment growth and ongoing contributions. That makes the proposal a planning consideration for a broader audience than the headline figures might suggest.

There is also a timing dimension. With the measure framed around a 1 July 2026 start, the period before that date is when individuals and their advisers can review structures, contribution patterns and liquidity. Acting on incomplete information carries its own risks, so the sensible posture is to understand the proposal closely while waiting for the legislative detail to settle.

Who may be affected

Division 296 is aimed at individuals whose total superannuation balance exceeds $3 million at the end of a financial year. Importantly, the test combines all of a person's superannuation interests, so someone with balances spread across several funds is assessed on the total rather than on any single account.

On the figures commonly cited, the cohort initially captured is a small share of account holders, often described as around 0.5 per cent, or tens of thousands of people. For most Australians, the measure will have no direct effect at all. The point of the threshold is to focus the additional tax on the largest balances in the system.

That said, the absence of indexation means the affected group could widen over time. As balances grow with markets and contributions, more people may eventually find themselves above $3 million in nominal terms, even if the real value of that sum has eroded. This is the bracket-creep concern that commentators have raised, and it is one reason younger high earners are paying attention.

What investors should understand

An additional 15 per cent, not a replacement

The first thing to grasp is that Division 296 does not replace the existing tax on superannuation earnings. Fund earnings are already generally taxed at 15 per cent in the accumulation phase. Division 296 would add a further 15 per cent on the relevant portion of earnings, which is why commentators often describe an effective rate of around 30 per cent on that portion.

Crucially, the additional tax applies only to the share of earnings linked to the balance above $3 million, not to the entire balance and not to every dollar of earnings. The mechanics of that apportionment are what make the calculation distinctive.

The proportion above the threshold

The proposal calculates the share of earnings subject to the extra tax using a simple proportion: the amount by which the total superannuation balance exceeds $3 million, divided by the total balance. In formula terms, that is (TSB minus $3,000,000) divided by TSB.

Consider an individual with a balance of $4 million. The excess over the threshold is $1 million, and the proportion is $1 million divided by $4 million, or 25 per cent. Only 25 per cent of that year's earnings would be exposed to the additional 15 per cent, not the whole amount. As a balance climbs further above the threshold, the proportion rises towards, but never reaches, 100 per cent.

Liability sits with the individual

Division 296 is assessed and levied at the individual level rather than at the fund level. The person receives the assessment and is liable for the tax. In general, they can elect to pay it from personal funds or to have it released from their superannuation, giving some flexibility in how the cost is met.

The unrealised gains debate

One of the most debated features of the original proposal is how it defined earnings. Rather than relying solely on income that has been received or gains that have been realised, the original design measured earnings by reference to the year-on-year change in the total superannuation balance, adjusted for contributions and withdrawals.

The practical effect of that method is that movements in the value of assets could be captured even where nothing had been sold. In other words, unrealised gains, paper increases in the value of holdings such as shares or property, could form part of the earnings figure on which the additional tax is calculated.

Critics argued this was a departure from the usual principle of taxing gains when they are realised, and raised concerns about taxing value that might later fall away. Supporters of the broad approach pointed to its administrative simplicity. This treatment should be understood as a feature of the original proposal rather than settled law; it has been a central point of contention, and investors should confirm the final detail before drawing conclusions.

SMSF and managed super fund considerations

Because Division 296 is assessed on an individual's combined balance, it applies regardless of whether savings are held in a self-managed superannuation fund (SMSF) or a large managed fund. The structure of the fund does not change the test; the individual's total balance does.

For SMSF trustees, the practical issues tend to be sharper. SMSFs often hold concentrated or illiquid assets, such as direct property or unlisted investments, and an earnings measure based on year-on-year balance changes could produce a tax liability in a year when little or no cash has actually been received. Trustees may need to think about how a liability would be funded if it arises, and about the quality and timing of asset valuations.

Members of large managed funds are not exempt, but the mechanics of valuation and liquidity are typically handled within the fund's pooled arrangements. The individual still receives an assessment based on their share of the relevant balance, and still chooses how to pay it. The common thread is that the measure follows the person, not the fund.

Possible planning options

Wealth advisers and tax specialists have discussed a range of areas that individuals near or above the threshold might review with a licensed professional. These are options that people talk about, not recommendations, and their suitability depends entirely on personal circumstances.

• Reviewing the level and timing of voluntary contributions, given the role contributions play in pushing a balance higher.
• Considering, where eligible, partial withdrawals or recontribution arrangements that adjust how wealth is held.
• Holding some assets through alternative structures outside superannuation, where appropriate to the individual's goals.
• Family or discretionary trusts as a way some households organise long-term wealth.
• Investment or insurance bonds, which some commentators raise as a tax-effective vehicle held outside super.
• Philanthropic or charitable structures for those with giving objectives.

Each of these carries its own rules, costs and trade-offs. The right course depends on age, cash-flow needs, the composition of assets and the final shape of the legislation. None should be pursued without tailored, licensed advice.

Risks and uncertainties

The most significant uncertainty is the legislation itself. The proposal has moved during debate, and elements that feature in commentary, including the start date, the treatment of unrealised gains and the question of indexation, may differ in the final law. Decisions made on the assumption that the original design will pass unchanged could prove premature.

A further risk is overreacting. Because only a small portion of earnings on the excess above $3 million is exposed to the extra tax, the impact for many affected individuals is more modest than headline framing suggests. Restructuring in haste can crystallise costs, trigger other tax consequences or sacrifice the genuine benefits of superannuation.

There is also the long-run question of bracket creep. If the threshold remains unindexed, the proposal's reach broadens over time. That is a structural feature worth monitoring rather than a reason for immediate action today.

What to watch before 1 July 2026

Ahead of the framed commencement date, several signals will help clarify how the measure will operate in practice.

• Whether the final law retains the year-on-year balance method for earnings or moves towards a realised-gains approach.
• Any decision on indexing the $3 million threshold, which directly affects how many people are captured over time.
• Confirmation of the start date and any transitional rules for the first year of operation.
• Guidance on valuation requirements for illiquid assets and the timing of assessments.
• Detail on how individuals elect to pay the tax personally or from their fund.

Tracking these points allows individuals to prepare without committing to irreversible steps based on a design that may still change.