SMSF Invest in Private Company ATO: The 5% Rule That Could Derail Your Retirement Plans

Self-Managed Super Funds (SMSFs) have become increasingly popular among Australians seeking greater control over their retirement savings. Unlike traditional superannuation funds, SMSFs give trustees direct decision-making power over investment choices, potentially offering more flexibility and customization to match individual retirement goals. The Australian Taxation Office (ATO) serves as the primary regulator for SMSFs, overseeing compliance with superannuation laws and ensuring that funds operate within the established legal framework.

The growing preference for SMSFs stems from their capacity to provide investment autonomy. Many trustees appreciate the ability to make strategic decisions about their retirement funds rather than relying on external fund managers. However, this freedom comes with significant responsibility, particularly when considering investments in private companies. The ATO’s oversight ensures that SMSF investments serve their primary purpose – providing retirement benefits to members – rather than being used for immediate benefits or purposes that contravene superannuation legislation.

Investing in Private Companies Through Your SMSF

When managed correctly, SMSFs can legitimately invest in private companies as part of a diversified investment strategy. This approach can potentially offer several advantages for trustees looking to expand beyond traditional assets like property and publicly listed shares. Private company investments may provide exposure to emerging sectors, family businesses, or specialized industries that align with the trustees’ knowledge and expertise.

A professional boardroom meeting with diverse SMSF trustees reviewing investment documents for a private company. Financial charts and investment portfolios visible on the table. Modern office setting with city skyline visible through windows. Photo style, shallow depth of field, natural lighting, shot with 50mm lens.

The potential benefits of investing your SMSF funds in private companies include:


  1. Diversification beyond traditional assets – Private company investments can complement more conventional SMSF holdings such as property and listed shares.

  2. Potential for higher returns – Some private companies may offer growth opportunities that outpace more traditional investment vehicles.

  3. Investment in familiar industries – Trustees can leverage their professional expertise by investing in private companies within sectors they understand.

  4. Contribution to business growth – SMSF capital can support emerging businesses that may not qualify for traditional financing.

However, these investments must always align with the fund’s sole purpose test – providing retirement benefits to members. This fundamental principle guides all SMSF investment decisions, including those involving private companies. Additionally, investments must be made on an arm’s length basis, meaning transactions occur under the same conditions that would apply between unrelated parties in a standard business transaction.

When considering whether to invest your SMSF in a private company, trustees must carefully evaluate whether such investment supports members’ retirement objectives. The investment should form part of a coherent, documented investment strategy that considers risk, return, diversification, and liquidity needs of fund members.

Key Point: Always ensure private company investments align with your documented SMSF investment strategy and support long-term retirement objectives.

The Critical 5% In-House Asset Rule

Perhaps the most significant ATO rule governing SMSF investments in private companies is the 5% in-house asset rule. This regulation is designed to prevent SMSFs from being used primarily to support related businesses rather than focusing on retirement savings.

Under this rule, investments in related parties (including related private companies) must not exceed 5% of the total market value of the fund’s assets. This threshold applies at the time of acquisition and must be continuously monitored, particularly at the end of each financial year on June 30.

The ATO defines an in-house asset as:

  • A loan to a related party
  • An investment in a related party
  • An asset of the fund that is leased to a related party

For example, if your SMSF has total assets of $1 million, no more than $50,000 can be invested in related private companies. This limitation ensures that the bulk of retirement savings remains diversified and not overly concentrated in related entities.

If an SMSF exceeds the 5% threshold at the end of a financial year, trustees must prepare and implement a written plan to reduce the in-house asset percentage to 5% or less. This plan must be formulated before the end of the next financial year and executed promptly.

⚠️ Compliance Alert: If your SMSF exceeds the 5% in-house asset threshold, immediate action is required to develop and implement a correction plan.

A worried business professional reviewing SMSF compliance documents with a large "5%" warning sign prominently displayed. Red regulatory flags and warning indicators visible on financial charts. Desktop with calculator, investment statements, and ATO notification letter. Photo style, dramatic lighting, professional office setting.

“Many SMSF trustees underestimate the strictness with which the ATO enforces the 5% rule,” explains Sarah Chen, SMSF specialist at Aries Financial Pty Ltd. “We’ve seen cases where even a temporary breach has led to significant compliance issues. Maintaining continuous awareness of this threshold is essential for trustees investing in private companies.”

Maintaining transactions on an arm’s length basis is equally crucial when investing in private companies. All investments must be made at market value, and any returns must reflect commercial rates. Independent valuations become particularly important when dealing with private companies, as their shares aren’t publicly traded with readily available market prices. This is especially important for SMSF asset valuation compliance.

Documentation and Valuation Requirements

When an SMSF invests in a private company, proper documentation becomes crucial for ATO compliance. Trustees should maintain:

  1. Written investment strategy documenting how the private company investment fits within the fund’s overall approach
  2. Valuation evidence showing the investment was acquired at market value
  3. Ongoing valuations to demonstrate continued compliance with the 5% in-house asset rule
  4. Transaction records showing all dealings occurred on commercial terms

Independent valuations are particularly important for private company investments since, unlike publicly listed companies, there’s no daily market price available. The ATO expects trustees to obtain objective valuations from qualified professionals, especially when dealing with related entities. This requirement aligns with ATO guidelines on valuing SMSF assets.

These valuations should be conducted:

  • At the time of initial investment
  • Annually as part of financial year reporting
  • When additional investments are made
  • If there are significant changes to the company’s circumstances

“Independent valuations serve as your protection,” notes David Thompson, compliance advisor at Aries Financial Pty Ltd. “They demonstrate to the ATO that you’ve taken reasonable steps to ensure compliance with the arm’s length requirements and the 5% rule. This documentation is your first line of defense in case of an audit.”

Risks of Non-Compliance and Potential Penalties

The consequences of failing to comply with ATO rules for SMSF investments in private companies can be severe, potentially derailing retirement plans and resulting in significant financial penalties.

If an SMSF breaches the 5% in-house asset rule and fails to correct it according to a documented plan, the ATO may determine the fund to be non-compliant. This classification can lead to:

  1. Loss of tax concessions – The fund’s income (including capital gains) may be taxed at the highest marginal rate (currently 45%) rather than the concessional 15% rate typically applied to complying SMSFs.

  2. Administrative penalties – The ATO can impose administrative penalties of up to 60 penalty units (currently $13,320) per trustee for serious breaches.

  3. Rectification directions – The ATO may issue legally binding directions requiring trustees to take specific actions to address breaches.

  4. Education directions – Trustees may be required to complete specified education courses to improve their understanding of SMSF obligations.

  5. Disqualification of trustees – In severe cases, the ATO can disqualify individuals from acting as SMSF trustees.

Beyond these immediate penalties, non-compliance can significantly impact retirement plans. The higher tax rates applied to non-complying funds can erode retirement savings, while forced liquidation of non-compliant investments may occur at inopportune times, potentially leading to financial losses.

A recent case study highlights these risks. In 2022, an SMSF invested 30% of its assets in a related private company without properly documenting how this aligned with the fund’s investment strategy. When the ATO conducted an audit, the trustees faced penalties of over $8,000 each and were required to divest most of the investment to bring the fund below the 5% threshold – during a market downturn that resulted in significant losses.

Warning: Non-compliance with SMSF regulations can result in significant financial penalties and threaten your retirement security.

Navigating Compliance Successfully

Understanding and adhering to ATO regulations is essential for SMSF trustees, property investors, and financial professionals considering private company investments through SMSFs. The regulations aren’t designed to prevent such investments entirely but rather to ensure they serve their proper purpose – building retirement wealth within a structured framework that protects beneficiaries.

At Aries Financial Pty Ltd, we believe in empowering our clients with the knowledge and tools to make informed investment decisions that comply with regulations while advancing their financial goals. Our philosophy centers on three core principles that directly apply to SMSF investments in private companies:

Integrity – We advocate for transparent, ethical investment practices that prioritize long-term retirement security over short-term gains or convenience. This means ensuring all private company investments are properly documented, independently valued, and maintained within regulatory limits.

Expertise – Our team maintains deep knowledge of SMSF regulations, particularly around complex areas like private company investments. We stay current with ATO guidelines and interpretations to provide accurate, up-to-date guidance.

Empowerment – We focus on educating SMSF trustees about both the opportunities and constraints of private company investments, enabling them to make confident decisions that balance compliance with investment objectives.

For trustees considering investing their SMSF in a private company, we recommend these best practices:

  1. Conduct thorough due diligence on the private company, assessing its financial health, governance structure, and growth prospects.

  2. Document how the investment aligns with your fund’s investment strategy and the sole purpose test.

  3. Maintain rigorous records of all transactions, including evidence of arm’s length dealings and market-based pricing.

  4. Implement regular valuation processes to monitor compliance with the 5% in-house asset rule, particularly for related-party investments.

  5. Consider the liquidity implications of private company investments, ensuring the fund can still meet benefit payment obligations.

  6. Consult with SMSF specialists before proceeding with complex investments to identify potential compliance pitfalls.

“The key to successful SMSF private company investments lies in preparation and ongoing vigilance,” says Michael Roberts, Director at Aries Financial Pty Ltd. “When properly structured and monitored, these investments can form a valuable component of a retirement strategy while remaining firmly within ATO guidelines.”


The 5% in-house asset rule represents just one of many regulations governing SMSF investments in private companies, but it’s often the most challenging to manage, particularly as fund values fluctuate over time. By understanding these limitations and implementing robust compliance processes, trustees can confidently explore private company investments while safeguarding their retirement plans from regulatory pitfalls.

As Australia’s trusted SMSF lending specialist, Aries Financial Pty Ltd remains committed to supporting clients in navigating the complexities of SMSF investments, ensuring compliance while maximizing opportunities for growth and diversification in retirement planning.

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