Child support when you're self-employed
Running your own business adds layers of complexity to child support. Whether you're a sole trader, in a partnership, or operating through a company, I can help you understand how your income is assessed.
Why self-employment complicates everything
The child support formula was built around the concept of a predictable, steady salary. When you're self-employed, almost nothing about your income is predictable or steady. Your income can vary dramatically from year to year, your business structure affects how income is reported, and the line between personal and business finances is often blurred.
I've worked with hundreds of self-employed parents — from tradies and freelancers to professionals running substantial practices. The common thread is that the standard assessment process rarely captures their financial reality accurately on the first attempt.
Whether you're the self-employed parent being assessed, or the other parent who suspects the assessment doesn't reflect the true picture, understanding how self-employment income is calculated is essential.
How your income is calculated
Services Australia doesn't just take the bottom line of your tax return. For self-employed parents, they calculate an "adjusted taxable income" that adds back certain items:
- Taxable income: Your reported business income minus allowable deductions — this is the starting point.
- Reportable fringe benefits: If your business provides you with personal benefits (vehicle, housing, etc.), these are added back.
- Reportable superannuation contributions: Voluntary super contributions above the compulsory amount.
- Tax-free government pensions or benefits.
- Net investment losses: Negative gearing and other investment losses that reduced your taxable income are added back.
The result is a figure that's intended to reflect your actual financial capacity rather than your tax-minimised income. Whether it succeeds in doing so accurately is often where the disputes arise.
Where self-employed assessments go wrong
In my experience, these are the most common areas of contention for self-employed parents:
- Income fluctuation: A great year followed by a poor year means your assessment may be based on income you no longer earn. You can lodge an estimate of current year income, but be warned — underestimating carries penalties.
- Business expenses: Services Australia can challenge deductions they consider excessive or personal in nature. A home office is fine; a "business trip" that's mostly holiday is not.
- Cash economy issues: If the other parent believes you're earning cash that isn't declared, they can apply for a change of assessment. Services Australia will look at your lifestyle relative to your declared income.
- Drawings vs salary: Many business owners pay themselves inconsistently. Whether you draw $2,000 one week and $10,000 the next doesn't matter — it's the annual picture that counts.
- New business losses: Starting a new business that generates losses can significantly reduce your assessed income. The other parent may challenge whether those losses are genuine or a strategy to minimise child support.
Questions from self-employed parents
Legitimate business expenses reduce your taxable income and therefore your child support assessment. But Services Australia can scrutinise expenses they consider personal, excessive, or primarily aimed at reducing child support. The test is whether the expense is genuinely necessary for producing your business income.
You can lodge an income estimate for the current year if your last tax return doesn't reflect your current earnings. However, if you underestimate by more than 10%, a penalty may apply. I help clients prepare realistic estimates that protect their position without triggering penalties.
They can apply for a change of assessment on reason 8 — that your income doesn't reflect your true financial capacity. Services Australia will investigate, looking at your assets, lifestyle, spending, and business records. Having clean records and a clear explanation of your financial position is your best defence.
The assessment methodology differs. As a sole trader, your business income is your personal income for tax and child support purposes. A company director's situation is more complex — Services Australia may look at both your salary and the company's income that's available to you. See my page on high income assessments for more on corporate structures.
Practical guidance for business owners
I help self-employed parents in two key ways: understanding how their income will be assessed, and navigating the process when the assessment doesn't seem right.
- Reviewing your financial structure and explaining how it affects your child support position
- Helping you prepare accurate income estimates that withstand scrutiny
- Advising on change of assessment applications — whether you're making one or responding to one
- Identifying legitimate issues with the other parent's declared income
- Guidance on binding agreements that account for income variability
Self-employed and navigating child support?
I understand the complexities of business income and child support assessments. Let's talk about your situation.
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