SMSF actuarial certificates: why most mixed-phase funds need one each year, and what the disregarded small fund assets rule changed

For Self-Managed Super Funds with members in both accumulation phase (where fund earnings are taxed at 15%) and retirement phase (where fund earnings supporting pension liabilities are tax-exempt as Exempt Current Pension Income), the trustee must allocate fund earnings between the taxable and exempt portions each financial year. The Australian super tax framework provides two methods for doing this allocation under Subdivision 295-F of the Income Tax Assessment Act 1997. The first is segregation under section 295-385 (https://classic.austlii.edu.au/au/legis/cth/consol_act/itaa1997240/s295.385.html, accessed 8 May 2026), where specific assets of the fund are formally dedicated to supporting pension members; the earnings on those segregated assets are tax-exempt and the remainder of the fund continues under accumulation-phase tax. The second is the proportionate method under section 295-390 (https://classic.austlii.edu.au/au/legis/cth/consol_act/itaa1997240/s295.390.html, accessed 8 May 2026), where the entire fund operates as a single asset pool and an actuary calculates the average proportion of fund assets supporting pension liabilities over the year — that proportion of total earnings is exempt, with the remainder taxed at 15%. The proportionate method requires an actuarial certificate each financial year, lodged with the SMSF's annual return. From 1 July 2017, the disregarded small fund assets (DSFA) rule in section 295-387 (https://classic.austlii.edu.au/au/legis/cth/consol_act/itaa1997240/s295.387.html, accessed 8 May 2026) — introduced as part of the Treasury Laws Amendment (Fair and Sustainable Superannuation) Act 2016 (https://www.legislation.gov.au/C2016A00081, accessed 8 May 2026) — further restricted the use of segregation for SMSFs where any member has a Total Super Balance above $1.6 million and is in retirement phase somewhere in the super system. For many post-2017 high-balance SMSFs, the actuarial certificate became a routine annual cost and the segregation alternative was effectively closed off.

The two-phase distinction is the foundation of the framework. In accumulation phase, fund earnings — interest, dividends, rent, capital gains — are taxed at the standard fund rate of 15%, with the one-third CGT discount reducing the effective rate on capital gains held over 12 months to 10%. In retirement phase (where the member has commenced an account-based pension or other complying retirement income stream within the Transfer Balance Cap, currently $2.0 million from 1 July 2025), fund earnings supporting the pension are tax-exempt as Exempt Current Pension Income (ATO — calculating exempt current pension income, https://www.ato.gov.au/individuals-and-families/super-for-individuals-and-families/in-detail/smsfs/administering-and-reporting/smsf-auditors/calculating-exempt-current-pension-income, accessed 8 May 2026). The exempt earnings flow through tax-free at the fund level, and the resulting pension income is also tax-free for over-60 pensioners. For an SMSF with $2.4 million total assets where one member has $1.6 million in pension phase and another member has $800,000 in accumulation, the fund must allocate its earnings between the tax-exempt portion (supporting the pension) and the taxable portion (supporting accumulation).

The segregation method allows the trustee to formally dedicate specific assets to supporting pension members. For example, a $1.0 million pension might be specifically supported by a designated holding of cash, listed shares, and managed funds; those assets are recorded as the pension's segregated current pension assets, and the earnings on them flow through tax-free without needing actuarial calculation. Other assets (perhaps a property or a different share portfolio) continue as the accumulation member's assets and produce earnings taxed at 15%. The segregation requires clear documentation in the fund's records, asset designations that are maintained throughout the year, and accounting that allocates earnings appropriately between the two designations. Segregation avoids the annual cost of the actuarial certificate (typically $150–$400 per year for standard SMSFs) but requires more administrative discipline. Where the fund is wholly in retirement phase (every member's interest is supporting a retirement income stream, with no accumulation interests), the entire fund's assets can be treated as segregated current pension assets without needing a certificate at all — the fund's earnings are simply 100% exempt for the period.

The proportionate method treats the fund as a single undifferentiated asset pool. All earnings are aggregated, and the actuary calculates the proportion of fund assets that supported pension liabilities over the year — typically an average across the year reflecting daily or monthly weightings, accounting for pension commencements and cessations during the period. The actuary issues a certificate stating the calculated exempt proportion (e.g., 76.4%) which is applied to the fund's total earnings to determine the tax-exempt portion; the remainder is taxed at 15%. The certificate is the documentation supporting the proportionate calculation in the SMSF's annual return. The advantage of the proportionate method is administrative simplicity — no asset designation needed, single investment strategy, single accounting pool — at the cost of the annual certificate fee.

The disregarded small fund assets rule in section 295-387 changed the landscape from 1 July 2017. Section 295-387 provides that the segregated current pension assets method is unavailable where, at the prior 30 June, any member of the SMSF had a Total Super Balance over $1.6 million (the DSFA threshold, fixed at that level — it does not move with the general TBC indexation) AND that member had at least one retirement-phase income stream anywhere in the super system. Where the rule applies, the fund's assets are treated as not segregated for the purposes of section 295-385 — the proportionate method (and an actuarial certificate) becomes the only available pathway for the fund's mixed-phase year. The policy rationale was to prevent strategic segregation by wealthy members where high-growth or high-yielding assets would be steered into the segregated pension portion to capture tax-exempt earnings while low-growth assets stayed in accumulation. For SMSFs below the DSFA trigger (where no member has TSB over $1.6 million with a retirement-phase income stream), segregation remains available; for high-balance funds, the proportionate method is mandatory.

The practical impact for most SMSF trustees is that the actuarial certificate is a routine annual compliance item handled by the SMSF accountant. The market for SMSF actuarial certificates has commoditised since the 2017 reforms, with specialist providers (Heffron, Class Limited, Accurium, Lime Actuarial and others) offering online certificate services at relatively low cost. Most SMSF accountants integrate certificate procurement into their annual return workflow — the certificate is obtained automatically as part of the year-end work, lodged with the annual return, and the trustee sees the cost on the accountant's invoice rather than engaging directly with the actuary. For trustees, the certificate is essentially invisible administrative work that allows the fund's tax position to be properly calculated; the strategic choices have largely been made (or removed) by the DSFA framework.

For SMSFs that don't need a certificate, the position is straightforward: funds entirely in accumulation phase (no pension members) have no exempt earnings to calculate; funds entirely in retirement phase for the full year (every interest supporting a retirement income stream, with no accumulation interests at any point) have all earnings exempt without needing a certificate; and funds using genuine segregation where DSFA doesn't apply can rely on the segregated asset method. For everyone else with mixed phases and any DSFA trigger, the certificate is mandatory. The trustee's awareness of which category their fund falls into matters for budgeting and for understanding the fund's tax structure.

A specific scenario worth flagging is mid-year pension commencement or cessation. When a member commences a pension partway through a financial year, the fund moves from single-phase (pure accumulation) to mixed-phase (accumulation plus pension) at that point. The actuarial certificate handles the partial-year calculation, with the exempt proportion reflecting the fact that pension liabilities only existed for part of the year. Similarly, when a pension is commuted back to accumulation (for example to manage TBC after an indexation event, or upon the death of a member with reversion arrangements), the certificate accommodates the transition. Practitioners managing client TBC events don't need to schedule the actions around the financial year — the certificate calculation handles the timing. The related article on articles/2026-05-04-defined-benefit-pension-16x-special-value-tba covers the TBC special-value rules that often interact with these decisions.

The strategic implications are largely settled by DSFA for most modern SMSFs. For clients with substantial retirement-phase balances, the historical strategy of "putting high-yielding assets in the pension portion to capture tax-exempt earnings" doesn't work under the proportionate method — the calculation allocates earnings proportionally regardless of which specific assets generated them. Investment strategy decisions can focus on overall portfolio construction (risk, return, diversification, liquidity) rather than on which assets sit in which member's portion. For trustees managing investment strategy, this is administrative simplification — the asset allocation is no longer entangled with member-phase tax engineering.

For SMSFs below the DSFA threshold, segregation remains available and may be worth considering. Reasons to consider segregation include avoiding the annual certificate cost (a few hundred dollars saved per year), enabling specific asset allocation to pension members where appropriate (for example, a member's pension specifically supported by a property they want to retain into retirement), and cleaner accounting for funds with simple member structures. The trustee needs to maintain proper asset designation records, accounting allocations, and clear separation throughout the year to support the segregation. For most trustees, the proportionate method (with certificate) is the simpler default; segregation is a deliberate choice for specific scenarios.

What do worked planning examples show?

These two cases show how the actuarial certificate framework plays out for typical SMSF scenarios. Illustrative only — not personal advice — using FY25-26 figures.

Case 1 — David and Helen, joint trustees of a $2.4 million SMSF where Helen is in pension phase ($1.6m account-based pension) and David is in accumulation ($800,000). Helen's TSB is at the $1.6 million DSFA threshold and she is in retirement phase, so the disregarded small fund assets rule in s.295-387 may bite at the threshold or above; in practice for any member at or above $1.6 million TSB with a retirement phase income stream, segregation is treated as not segregated and the proportionate method is the only route. On these facts, the rational pathway is the standard annual workflow: the SMSF accountant procures an actuarial certificate from a specialist provider as part of the annual return preparation, the certificate calculates the average proportion of fund assets supporting Helen's pension over the year (around 67% given the $1.6m / $2.4m ratio with adjustments for cash flows during the year), and 67% of the fund's total earnings are tax-exempt with the remaining 33% taxed at 15%. The certificate cost (in the order of $200–$300) is included in the accountant's annual fee. The trap to avoid is assuming segregation is available — under DSFA it is not — and trying to allocate specific assets to Helen's pension portion. The proportionate method is the operative framework.

Case 2 — Robert, sole member of a $900,000 SMSF, with a $400,000 account-based pension and $500,000 in accumulation (he is still working part-time and contributing). Robert's TSB is below the $1.6 million DSFA trigger, so DSFA does not apply. He has the choice between segregation and proportionate method under s.295-385 / s.295-390. On these facts, the rational analysis is to weigh the trade-offs: segregation avoids the modest annual certificate cost but requires asset designation discipline, while the proportionate method is administratively simpler with the certificate cost. For a fund with diverse investments and Robert's working-and-contributing status, the proportionate method is likely the more practical choice — the asset allocation is dynamic with ongoing contributions, and the proportionate calculation handles this flexibility well. Robert's accountant procures the certificate annually; the cost is modest and the structure works for the changing fund position. The trap to avoid is overcomplicating the choice — for a fund of Robert's size and complexity, the proportionate method is the typical default and works well.

For SMSF trustees with members in both accumulation and retirement phases, the actuarial certificate is the documentation that supports the proportionate-method calculation of tax-exempt fund earnings under s.295-390 of the ITAA 1997. Since the DSFA rule's introduction in 2017, the proportionate method is mandatory for many high-balance funds — segregation is effectively closed off where any member has TSB above $1.6 million combined with a retirement-phase income stream. For most modern SMSFs with mixed-phase members, the certificate is a routine annual compliance item handled by the SMSF accountant at low cost. The strategic implications are largely settled — investment strategy decisions can focus on overall portfolio construction without member-phase asset engineering. For trustees, awareness of why the certificate is needed, what it does, and when segregation alternatives might apply supports good understanding of the fund's tax structure.

Sources

• classic.austlii.edu.au — S295.385
• classic.austlii.edu.au — S295.390
• classic.austlii.edu.au — S295.387
• Australian Taxation Office (ATO) — Calculating exempt current pension income
• Federal Register of Legislation — C2016A00081