Proving income when the other side is self-employed or owns a business
REVIEWED BY: Sean McNamara on 2026-09-01
The core problem
Salaried income is easy to verify: payslips and P60s. Self-employed income and business ownership are not — money can sit in a company, be paid as dividends, deferred, or made to look like business expenses. Both child maintenance and financial remedy cases meet this constantly.
The tools the law already gives you
Child Maintenance Service
- CMS can assess income from HMRC tax data — it uses taxable profit for the relevant year, which catches most self-employed parents.
- If you believe the reported figure is manipulated, you can ask the CMS to reassess and to investigate unearned income; a variation application can bring in dividends, rental income and other untaxed earnings.
- CMS can also require information directly and use penalties for non-cooperation.
Financial remedy (divorce finances)
- Form E requires full financial disclosure including business accounts, directorships and shareholdings. Deliberate non-disclosure can lead to the court re-opening a settlement years later (non-disclosure cases are a recognised route back to court).
- The court can order specific disclosure: tax returns (SA302s), company accounts filed at Companies House, bank statements, and a questionnaire answered before the Financial Dispute Resolution hearing.
- Forensic accountants can be jointly instructed to analyse a business's true earnings capacity; the court can also draw adverse inferences where a party refuses to disclose or assets mysteriously moved.
Red flags worth documenting
- Income reported to CMS/HMRC that never matches visible lifestyle.
- A new company or directorship created around separation.
- "Company loan" drawings, salary paid to a new partner, or dividends timed to assessment dates.
- Cash-in-hand patterns — harder to prove but corroborated by bank deposit patterns.
Practical approach
1. Collect what is public anyway: Companies House filings are free to search. 2. Put precise document requests in writing early; vague "full disclosure" requests get vague answers. 3. Ask the CMS (or the court) to look at earning capacity, not just current declared income — a parent who voluntarily under-earns can be assessed on what they could earn.
Official links
- https://www.gov.uk/child-maintenance-service-what-it-is
- https://find-and-update.company-information.service.gov.uk/
- https://www.gov.uk/government/publications/form-e-financial-statement
This page is general information, not legal advice. YourFamilyCase.co.uk is an independent information directory and is not affiliated with HMCTS, HMRC or gov.uk.
Content verified against the official HMCTS court directory, gov.uk forms and fees pages, and the professional body registers (SRA, FMC, Bar Council). Last reviewed September 2026.