In short

A Public Ancillary Fund (PuAF) sub-fund lets a retiree open a named charitable sub-account inside an established public fund, typically from around $20,000-$50,000, getting an immediate tax deduction at their marginal rate while a professional trustee handles compliance and investment. The fund must distribute at least 4% of its net assets to operating charities each year, on the donor's recommendation.

For Australian retirees who want structured, ongoing charitable giving to be part of their retirement plan — especially in a one-off windfall year (the sale of a business, a large capital gain, an inheritance) when the tax saving on a deductible donation is at its highest — a Public Ancillary Fund sub-fund (PuAF sub-fund) is often a better fit than either a Private Ancillary Fund (PAF) or simply writing cheques. A PAF needs substantial committed capital to make its governance worthwhile and puts the donor (or family) in the trustee's chair with the full compliance load. A direct cheque is simple but builds no lasting structure. A PuAF sub-fund sits in between: it is established inside a larger public fund run by a professional trustee, can typically be opened with a modest amount (minimums vary by provider, commonly from around $20,000–$50,000), gives the donor an immediate tax deduction at their marginal rate, preserves the donated capital as an ongoing source of grants, and asks nothing of the donor beyond recommending where the grants go. For retirees with philanthropic intent but without PAF-scale capital, it is an under-used and often ideal vehicle.

The basic structure is well-established. A Public Ancillary Fund is a single trust endorsed as a Deductible Gift Recipient (DGR), within which a professional trustee — a major trustee company, a community foundation, or a charity-aligned trustee — runs many separate donor sub-funds. Each sub-fund is named ("The Smith Family Sub-Fund"), tracks its own capital and grant history, and follows the donor's recommendations on where to grant, while the trustee's shared infrastructure (compliance, accounting, investment management, grant administration) keeps the per-donor cost far below a stand-alone PAF. A retiree can usually have a sub-fund operating within weeks, with minimal documentation and no continuing governance burden.

The tax deduction works like any other DGR gift: it is deductible to the donor at their marginal rate, so for someone on the top rate (45% plus 2% Medicare levy, 47% for FY25-26) a $200,000 cash donation produces an immediate $94,000 tax saving. One important mechanical point: a gift deduction cannot create or increase a tax loss in a single year, so where a donation is larger than that year's taxable income, the donor can elect to spread the deduction over up to five income years. That five-year spread is exactly what makes the windfall-year strategy work — a retiree with a large capital gain on a business sale can concentrate the deduction against that top-rate income and carry the remainder forward against later years. Modelling the optimal split depends on projected taxable income across the period, but the lever is genuinely useful.

The 4% minimum distribution rule keeps the capital flowing to working charities. Each financial year a PuAF must distribute at least 4% of the market value of its net assets (valued at the end of the previous financial year) to DGRs that fall under item 1 of the table in section 30-15 — the operating charities such as the Red Cross, Cancer Council, food banks, hospital and education foundations, environmental and religious charities. It cannot distribute to other ancillary funds (item 2). This 4% rate is the headline difference from a Private Ancillary Fund, which must distribute at least 5%. For the donor, a $200,000 sub-fund must therefore push out at least $8,000 a year to operating charities of their choosing, while the trustee continues to invest the capital — so a well-invested sub-fund can fund grants for decades and still grow.

The comparison with a PAF clarifies the choice. A PAF is a stand-alone trust with its own DGR endorsement, bank accounts, investment portfolio and annual ATO compliance, where the donor or family act as trustee. Its annual running costs (audit, accounting, trustee administration) mean it is generally only cost-effective from around $500,000–$1M of capital. A PuAF sub-fund spreads that infrastructure across many donors, so it works from far smaller amounts. The PAF buys more control — full discretion over grants, investments and timing — at the price of the governance load; the PuAF cedes some of that control to the foundation's trustee but removes the administration entirely. For retirees who want to give in a structured way without becoming part-time philanthropy administrators, the sub-fund is usually the right answer.

The CGT trap on donating assets is where the original framing of this strategy most often goes wrong — and where Australia differs sharply from the United States. Donating appreciated assets (shares, property) rather than cash does not let you avoid capital gains tax during your lifetime. When you give an asset away, you are treated as having disposed of it at its market value on the day of the gift, so a CGT event happens and you must include the capital gain in that year's return — even though the gift is also deductible. You get a deduction for the market value (for listed shares worth $5,000 or less and held at least 12 months you can use the ASX value; larger gifts of property generally need an ATO valuation), but the gain is still realised. The deduction and the gain are separate entries; they may partly offset, but there is no CGT-free "donate the stock" outcome in life.

The estate angle reverses both halves of that — and is the genuinely tax-effective way to give assets. A gift made under your will (a testamentary gift) to a DGR is CGT-exempt: under section 118-60 of the ITAA 1997 the capital gain or loss is disregarded where the gift would have been deductible had it not been testamentary. The trade-off is that a testamentary gift is not income-tax deductible to anyone — the deceased can't claim it and the estate generally can't either. So the rule of thumb is: gifts of appreciated assets are cleanest on death (CGT-exempt, no deduction), while gifts of cash are cleanest during life (fully deductible, no CGT). A PuAF sub-fund can sit at the centre of both: you fund it with cash for the deduction now, and direct further capital to it under your will, with named successor advisers (often your children) continuing the recommending role across generations. Super death benefits are a separate and trickier matter — a super fund generally can only pay a death benefit to a tax dependant or to your estate, not directly to a charity, so directing super to a DGR is done through the estate and the tax on the taxable component needs careful structuring.

What do worked planning examples show?

These two cases show how PuAF sub-funds work in practice. Illustrative only — not personal advice — using FY25-26 figures.

Case 1 — Helen, 67, has just sold her business for $1.2M, with a $700,000 capital gain (after any small business CGT concessions). She has long supported her local hospital foundation, an environmental NGO and an adult-literacy charity, and wants to commit to ongoing giving without the administrative load of a PAF. On these facts Helen is a strong PuAF candidate. With a large gain landing in the sale year, her marginal rate is at the top, so a $250,000 cash donation concentrated against that top-rate income is worth up to about $117,500 (47% of $250,000); if the windfall year cannot absorb the whole deduction without creating a loss, she can spread the balance over up to five years against her later retirement income. The sub-fund must then distribute at least 4% — about $10,000 a year — across her three nominated causes on her recommendation, while the capital stays invested. On these facts the rational path is to choose a PuAF provider aligned with her causes, fund the sub-fund with cash from the sale proceeds (cash, not shares — to keep the gift fully deductible without an extra CGT event), and recommend grants each year, leaving the sub-fund to keep giving well beyond her lifetime if she names successor advisers.

Case 2 — Robert, 72, retired professional with about $1.4M in assets ($900,000 in super, a $500,000 home), no windfall, steady retirement income, who has been writing $5,000–$10,000 of cheques a year to local charities. Here the PuAF case is weak. Most of Robert's retirement income is tax-free super pension, so his marginal rate — and therefore the value of any deduction — is low; the deduction may be worth little or nothing against largely untaxed income. His giving is already at a scale where direct cheques work cleanly, and a sub-fund's structure would add overhead without a matching tax benefit. On these facts the honest advice is to keep giving directly, and perhaps to use a small testamentary sub-fund funded from his estate (where a gift of assets would be CGT-exempt) as a lasting legacy, rather than forcing a current-year structure that does nothing for him. Recognising when a PuAF does not fit is as much a part of the advice as recommending it when it does.

For retirees with charitable intent and capital to give — particularly in windfall years when marginal rates make a deduction valuable — the PuAF sub-fund is often the missing piece of the plan. The advice work is to quantify the giving capacity, compare PAF, PuAF and direct giving honestly, choose a provider whose values and infrastructure match the donor's intent, time the deduction (cash in life for the deduction, assets by will for the CGT exemption), and integrate the plan with the estate for continuity. Too often structured giving is left until "later," by which point the windfall year — and its deduction — has passed. The PuAF's low entry capital and minimal administration make it a vehicle retirees can realistically engage with at the right moment, not just in principle.

Sources

Key takeaways

  • A PuAF sub-fund typically opens from around $20,000-$50,000, far below the $500,000-$1M usually needed to make a stand-alone Private Ancillary Fund cost-effective.
  • A PuAF must distribute at least 4% of its net asset value to operating charities each year, compared with the 5% minimum for a Private Ancillary Fund.
  • A gift deduction can't create or increase a tax loss, but it can be spread over up to five income years — useful for concentrating a large donation against a windfall year's top marginal rate.
  • Donating appreciated shares or property during your lifetime still triggers CGT on the market-value gain, even though the gift is also deductible — there's no CGT-free way to donate assets while alive.
  • A gift of assets made under your will to a DGR is CGT-exempt, though it isn't income-tax deductible — the opposite trade-off to donating the same assets during your lifetime.

Frequently asked questions

What's the difference between a Private Ancillary Fund and a Public Ancillary Fund sub-fund?

A Private Ancillary Fund (PAF) is your own stand-alone trust with your own DGR endorsement and full compliance responsibility, generally only cost-effective from around $500,000-$1M of capital. A Public Ancillary Fund (PuAF) sub-fund sits inside a larger public fund run by a professional trustee, sharing the compliance and administration costs across many donors, so it can work from a much smaller amount — commonly $20,000-$50,000.

How much does a PuAF sub-fund need to give to charity each year?

At least 4% of the market value of its net assets, valued at the end of the previous financial year, must go to operating charities like hospitals, environmental groups, or the Red Cross. On a $200,000 sub-fund, that's a minimum of $8,000 a year, with the donor recommending which causes receive it.

Can I donate shares to my charitable sub-fund to avoid capital gains tax?

No. Giving away an appreciated asset like shares or property is treated as a disposal at market value, so it triggers a capital gains tax event in that year, even though the gift is also tax-deductible. There's no way in Australia to donate an appreciated asset during your lifetime without realising the gain.

Is it better to give assets to charity during my lifetime or through my will?

For appreciated assets, giving through your will is generally more tax-effective, since a testamentary gift to a DGR is exempt from capital gains tax (though it isn't income-tax deductible to you or your estate). For cash, giving during your lifetime is better, since it's fully deductible at your marginal rate with no CGT involved.

A note on advice. This article is general information only and doesn't account for your personal circumstances. Everyone's situation is different — before acting, it's worth talking it through with a licensed adviser who knows your full picture.