Cracking the ATO’s Traffic Light System: Tax Planning for Professionals in Public Practice

For years, the wealth creation playbook for professionals in public practice—whether you are a lawyer, engineer, architect, IT consultant, or accountant—was predictable: set up a company or a family trust, pass a Personal Services Business (PSB) test, and safely split your income with a lower-earning spouse or park profits at the 25% corporate tax rate.

But the game has fundamentally changed.

With the ATO’s release of PCG 2025/5, the regulator has aggressively shifted the goalposts. The ATO has made it explicit that simply passing a technical "PSB test" (like having multiple unrelated clients) no longer shields a practitioner from Part IVA (the general anti-avoidance rules). If the dominant purpose of your corporate structure is to split personal exertion income or artificially hoard profits to pay less tax, the ATO will look right through it.

The ATO has granted a transitional grace period ending on 30 June 2027 for practitioners to realign their practices. Here is what you need to know to keep your structure compliant while maximizing your legitimate tax positions.

1. The "Whose Brain Earned It?" Rule

The law draws a sharp line between a business driven by an asset structure (like a firm owning heavy machinery, proprietary software IP, or employing a large team of graduates) versus a practice driven by personal exertion.

If your clients engage the business specifically for your personal expertise, license, and billable hours, your earnings are legally classified as Personal Services Income (PSI).

Even if you operate under a multi-client consultancy model or a fee-split arrangement with a principal firm, passing the unrelated clients test is no longer a blank check to divert profits. Under PCG 2025/5, the ATO uses a "Traffic Light" Risk Framework to judge your setup.

2. Navigating the ATO’s Risk Zones

🟢 The Green Zone (Low Risk)

• The Strategy: Your practice fees are collected by your company, ordinary business expenses are deducted, and 100% of the remaining net profit is distributed directly to you as a salary or director's fee.
• The Tax Reality: You are taxed at your individual marginal rate. While entirely audit-proof, using a company this way offers zero immediate income tax savings over being a sole trader. It acts merely as an administrative pass-through.

🟡 The Amber/Orange Zone (Moderate Risk)

• The Strategy: The company pays you a "commercial benchmark" salary—equivalent to what a senior principal or director in your specific field would earn in the open market (e.g., an anchored $400,000 salary inclusive of super). The remaining surplus (e.g., $300,000) is retained inside the company at the 25% base rate.
• The Catch: To survive an audit here, you must demonstrate a Genuine Commercial Rationale. The retained cash must stay inside the corporate bank account to fund actual business expansion, working capital, or capital expenditure. If you draw it out for personal lifestyle use via sloppy Division 7A loan agreements, you instantly drop into the Red Zone.

🔴 The Red Zone (High Risk — Audit Target)

• The Strategy: Paying dividends or an inflated "administrative salary" to a non-working spouse or family member who does not actively contribute to the firm, or hoarding profits at 25% with no commercial purpose.
• The Consequence: The ATO will apply Part IVA, cancel the tax benefits, re-allocate the income back to your personal return, and hit the group with hefty interest and penalties.

3. Legitimate Tax Levers: The Home Office / Studio Play

If aggressive income splitting is off the table, how do high-earning professionals minimize tax? The answer lies in building a genuine commercial asset.

If you are considering investing in building a dedicated consulting room, design studio, or professional office at your home, you may have found the ultimate Orange Zone justification. Earmarking retained corporate profits to fund business infrastructure completely answers the ATO's question of why you are keeping money in the company.

However, this strategy requires precise engineering to avoid major traps:

• The CGT Main Residence Trap: Dedicating a portion of your home as a formal, dedicated place of business breaches Section 118-190 of the ITAA 1997. You will lose your tax-free Capital Gains Tax (CGT) exemption on that specific percentage of the home’s floor area when you sell. Pro tip: You must get a formal property valuation the day the workspace opens to lock in your historical tax-free capital growth.
• Funding the Build (Division 7A): Do not let your company pay for structural "bricks and mortar" extensions on land you own personally—the ATO can treat this as a deemed dividend. Instead, pay for the structural build personally (and deduct the loan interest), while letting your company pay for and depreciate the internal fit-out (commercial fit-out, specialized tech infrastructure, client meeting fit-out) as corporate leasehold improvements.

4. The Malpractice Myth: Structure vs. Insurance

A final warning for professionals looking to incorporate: A Pty Ltd company does not protect you from personal professional negligence.

While a corporate structure shields your personal wealth from commercial debts (like defaulting on a commercial office lease or a business loan), it cannot absorb a tortious duty of care. If you provide negligent advice, sign off on faulty engineering designs, or breach your professional code of conduct, a client has the legal right to sue you personally.

Your primary shield against professional liability is an ironclad Professional Indemnity (PI) Insurance policy, not an ASIC registration.

Asset Protection: The "Low-Risk Spouse" Strategy

If you want to protect your personal wealth (like the family home) from potential professional lawsuits without destroying your tax exemptions, skip holding the property inside a Discretionary Trust. Trusts attract heavy state land tax surcharges and entirely wipe out your CGT Main Residence Exemption.

Instead, look at the Spouse Strategy: buying and titling the family home 100% in the name of a low-risk spouse (someone not exposed to professional indemnity claims) from day one. You preserve the 100% tax-free capital gains on your home while keeping the asset entirely out of reach from potential future professional negligence claims.

Is Your Practice Ready for 2027?

The ATO's transitional window is closing. If your current accounting structure relies on splitting professional fees with family members or hoarding profits without a documented capital expansion plan, you are sitting in the Red Zone.

Need to de-risk your structure? Book an Accountant Online

Disclaimer: This article is of a general nature only and does not constitute specific financial or tax advisory. Before changing your corporate structure or making property decisions, contact a certified professional.