Six member SMSFs: pooling family super, and what it really costs in control

Until 1 July 2021, an SMSF could have no more than four members. The Treasury Laws Amendment (Self Managed Superannuation Funds) Act 2021 lifted the limit to six. For most funds nothing changed: the typical SMSF still has one or two members. But for families in business, a six-member fund opened up a new option: parents and adult children pooling their super to buy and hold the family's business premises.

The option got more attention after 10 August 2026, when new SMSF loans to buy real property became limited to business real property. Pooling more members' balances is one way to buy without borrowing. This guide explains when a larger family fund makes sense, how control and voting work, what happens when a member dies or leaves, and the risks people underestimate. It's general information. Whether to set up or join an SMSF, and whether to roll your super into it, is financial product advice that a licensed financial adviser should give each member individually. We do the tax, accounting and compliance modelling and look after the fund.

When does a six-member SMSF make sense?

It makes sense when there is a clear shared purpose, the family can make decisions together, and each member would be better off (or at least no worse off) than in their own fund.

Key point: A six-member fund is a shared investment vehicle, not an inheritance plan. Each member's super stays theirs, and death benefits leave the fund.

How does a family SMSF buy business premises?

This is the main reason families set up larger funds. Business real property (land and buildings used wholly and exclusively in a business) is the one kind of real estate an SMSF can buy from a related party and lease back to the family business. Our business real property guide explains the definition.

Worked example: a family buys the warehouse

Example only, with round numbers. Say two parents in their early sixties each have $900,000 in super. Their three adult children, in their thirties and all working in the family business, have $150,000 each.

The family company leases a warehouse it would like to own. The building costs $1,800,000 including stamp duty and costs. The fund buys it from an unrelated seller with no debt, and keeps $450,000 in cash and other investments.

Each member's account gets a share of the income in proportion to their balance. When the parents start retirement-phase pensions, the share of income supporting those pensions becomes tax-free, and an actuarial certificate usually sets the exempt percentage each year.

Without the children's $450,000, the parents' $1,800,000 would cover the purchase but leave the fund with almost no cash. With them, the fund has a buffer for vacancies, repairs and pension payments. That's the real benefit of the extra members: liquidity and diversification, not just buying power.

The alternatives the family should also compare: the parents' fund borrowing under an LRBA (allowed for business real property), the parents' fund and the family trust co-investing through a 13.22C unit trust, or the property staying outside super. The children's own retirement interests have to be weighed separately in each case.

Who controls a six-member SMSF?

Every member is a decision-maker. With individual trustees, every member must be a trustee. With a corporate trustee, every member must be a director (a member under 18 is represented by a parent or guardian, and a member who has lost capacity by their attorney under an enduring power of attorney).

Trustee structure

The ATO notes that some state and territory laws limit the number of trustees a trust can have to fewer than six. In practice, a fund with five or six members almost always uses a corporate trustee: one company, with all members as directors. It also means one administrative penalty for a breach rather than one per trustee, and no title changes when members come and go. Our corporate trustee guide covers the switch.

Voting

The SIS Act doesn't set voting rules. The fund's trust deed and, with a corporate trustee, the company's constitution do. The common approaches:

Individual trustees are generally expected to act unanimously unless the deed says otherwise. Whatever you choose, it must be written into the deed and constitution by your solicitor, and it should cover:

• which decisions need a special majority (selling the property, borrowing, admitting a new member),
• how a director is removed or replaced, including on incapacity or death,
• how disputes are resolved before they reach court.

What happens when a member dies or wants to leave?

This is where family funds most often go wrong, because the plan was built around buying the property, not around getting money out.

When a member dies

• Their benefit must be paid. It can be paid to a spouse as a pension (a reversionary pension, if set up) or as a lump sum, or to other dependants, or to the estate.
• It can't be moved to a child's account inside the fund. Adult children who aren't financially dependent can only receive a lump sum, and it must leave the super system.
• Tax applies for non-dependants. An adult child who isn't a tax dependant generally pays up to 15% plus the Medicare levy (17% in total) on the taxed element of the taxable component of a lump sum death benefit. Our death benefit nominations guide explains how to plan this.
• The fund needs liquidity. In the warehouse example, when both parents have died their combined balances (perhaps $2 million or more by then) must be paid out. The children's balances can't absorb that. The fund will usually have to sell the property or transfer part of it out of super, which can trigger stamp duty and capital gains tax.

The family's wills, binding death benefit nominations and the deed's succession clauses have to be planned together. Our SMSF incapacity and succession guide covers how control passes when a director dies or loses capacity.

When a member leaves

A child who changes jobs, moves overseas, separates from a partner or simply wants out can roll their balance to another fund. The fund must pay them their share. With most of the fund in one property, that can mean selling it, unless the deed and the family have agreed how exits will be funded, such as other members contributing or the fund keeping a larger cash reserve.

What are the other risks of a six-member SMSF?

• One member's breach is everyone's problem. All trustees are responsible for the fund's compliance. If one member lends themselves fund money, the others carry the consequences.
• Different life stages, one investment strategy. The strategy must consider every member's circumstances, including liquidity for the parents' pensions and the children's long horizon. One property rarely suits both. Our investment strategy guide explains what it must cover.
• Residency. If a member moves overseas, the fund can fail the tests for being an Australian superannuation fund, which has severe tax consequences. Plan before anyone leaves.
• Family law. A member's balance can be split on separation, and if a former partner is also a member, the family has to agree how they leave the fund. Exits may be forced at a bad time.
• Large balances. Parents with total super balances above $3 million can pay extra tax under Division 296 from 2026–27. The family structure doesn't change that. See our Division 296 guide.
• Administration. More members mean more contributions to track, more member statements, actuarial certificates when members are in different phases, and more signatures for every decision.
• 13.22C entities. A non-geared unit trust only keeps its special status while the fund has no more than six members. That limit now matches the SMSF maximum, but it's a reason never to try adding a seventh person informally.

How do you add members to an existing SMSF?

In outline, with each step involving the right professional:

1. Each new member gets their own financial advice on whether to join, from a licensed financial adviser.
2. Check the trust deed allows up to six members, sets the voting rules you want, and covers exits and succession. Older deeds often cap membership at four. A solicitor varies the deed.
3. Set up or update the corporate trustee, appointing each new member as a director. Each new director needs a director ID.
4. Each new member signs the ATO trustee declaration within 21 days of becoming a trustee or director.
5. Update the ATO's records for the fund's members and trustees.
6. Roll over the new members' balances, and update the fund's investment strategy to reflect everyone's circumstances.
7. Review insurance for the new members, which may need to be arranged inside or outside the fund.

Mistakes we see with large family SMSFs

1. Assuming the property can stay in the family's super forever. Death benefits must leave the fund.
2. No voting rules, or rules nobody has read.
3. Adding a child for their balance, not for their interest. They carry trustee duties and penalties they don't understand.
4. No liquidity plan for pensions, exits and deaths.
5. Individual trustees in a state that limits the number of trustees.
6. A member moving overseas without checking the residency rules.
7. No plan for a member's separation.
8. Rent from the family business that isn't market rent, or isn't paid on time.

How BPAG helps

We prepare the fund's financial statements, member statements and annual return, coordinate the independent audit with an approved SMSF auditor, and monitor compliance year round. For families considering a larger fund:

• Modelling before anyone joins. We show each member's position under the options: separate funds, a six-member fund, a 13.22C unit trust, or the property outside super. Our super and SMSF agent works through the technical points (caps, pensions, death benefits, residency); your accountant checks every figure.
• Death and exit scenarios, so the family sees what happens to the property when a parent dies or a child leaves, before it happens.
• Estate planning check. Our estate planning agent reviews each member's will, enduring power of attorney and death benefit nomination for gaps; your accountant reviews the findings with you and your solicitor.

The agents draft. Qualified accountants review and sign off, and nothing goes to you, the auditor or the ATO without a person approving it. The deed, constitution and nominations are prepared by your solicitor, and each member's decision to join is a recommendation for a licensed financial adviser. Our succession and estate planning service brings the pieces together.

What to send us

• Each family member's latest super statement and total super balance
• The fund's trust deed and trustee company constitution, if the fund already exists
• Details of the property, the business that would lease it and the current lease
• Each member's will, enduring power of attorney and death benefit nomination, if available
• Any plans for members to retire, move overseas or leave the business

For the property rules, see our SMSF property guide. For ongoing accounting and audit, see our SMSF service.

General information only, current as at 18 October 2026. It is not personal tax, legal or financial product advice and doesn't take your circumstances into account. Talk to us before you act. Where a recommendation needs a licensed financial adviser or a solicitor, we work alongside them.