Child Support for the Self-Employed: Line 15000 is Just the Start.
Why your tax return doesn't tell the whole story. Understanding 'Add-Backs,' Retained Earnings, and how courts calculate true income for business owners.
Book Your Income Analysis SessionLegal Review: This financial guide was reviewed by Deepa Tailor, Senior Family Lawyer, to ensure compliance with Sections 17-20 of the Federal Child Support Guidelines regarding self-employment income (2026).
The 'CRA' vs. 'Family Law' Income Gap
For an employee, Child Support is based on Line 15000 of their tax return. For a self-employed person, Line 15000 is often artificially low due to tax write-offs. Family Courts have the power to 'look through' your tax return and add back deductions that are not valid for support purposes (like car allowances or home office write-offs). The goal is to determine the money actually available to pay support.
What Expenses Get Added Back to Income?
Personal Expenses
Vehicle leases, cell phone bills, and travel meals expensed through the business but used for personal life are added back to your income.
Home Office
Writing off mortgage interest or utilities reduces tax, but it doesn't reduce your ability to pay support. Courts often add a portion back.
Income Splitting
Paying a salary to a new spouse or family member who doesn't do real work? The court will add that salary back to *your* income.
Pre-Tax Corporate Earnings
Leaving money inside your corporation to defer tax? Courts can attribute those 'Retained Earnings' to you as if you paid yourself a dividend.
Tax Logic vs. Support Logic
The Accountant's Goal
Minimize Tax. Write off everything possible to lower Line 15000. Keep money in the corporation. This is smart tax planning.
The Judge's Goal
Maximize Support. Scrutinize every write-off. If a deduction provides a personal benefit, it is income. Judges will 'Impute' a higher income to ensure fairness to the child.
Proving (or Disproving) Income
A T1 General isn't enough. Self-employed parties must provide:
Financial Statements
Full financial statements of the business (Balance Sheet + Income Statement) for the last 3 years.
The General Ledger
A detailed list of every transaction. This reveals if 'Office Supplies' was actually 'School Supplies for the kids' or 'Groceries'.
Credit Card Statements
Personal and Business credit card statements to cross-reference lifestyle spending against declared income.
The Imputed Income Report
We often hire a valuator to write a report stating: 'The Payor says they earn $50k, but their lifestyle costs $120k. Income should be imputed at $120k.'
Self-Employment FAQs
Lifestyle Analysis. If you declare $20k/year but drive a Mercedes and pay a $3k mortgage, the court will assume you are hiding income and impute a higher amount.
Related Financial Resources
Deepa Tailor
Senior Family Lawyer
Deepa Tailor is the founder of Tailor Law. She works with forensic accountants to unravel complex self-employment income, ensuring support is based on financial reality, not just tax returns.
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