What is a CMS Tribunal?
A Child Maintenance Service (CMS) tribunal is an independent legal process where a parent can challenge a CMS decision. Tribunals are run by HM Courts & Tribunals Service and are separate from the CMS and DWP.
You may need a tribunal if you believe the CMS has calculated child maintenance incorrectly, ignored income, failed to consider shared care, or made procedural errors.
How to prepare a Tribunal Bundle
Read the guidance provided on what is required prior to purchsse. The Full Tribunal Pack is in the menu at top of this website.
When Can You Appeal to a Tribunal?
You usually go to tribunal after:
- Requesting a Mandatory Reconsideration (MR)
- Receiving a Mandatory Reconsideration Notice
- Disagreeing with the CMS final decision
The tribunal is your opportunity to present evidence and explain why the CMS decision is wrong.
Who Conducts a CMS Tribunal Hearing?
The tribunal will normally be conducted by an independent tribunal judge. Depending on the case, other tribunal members may also be appointed.
They review:
- Income evidence
- Shared care arrangements
- Special expenses
- CMS calculation errors
- Procedural fairness
How to Prepare for a CMS Tribunal
Preparation is critical. You should create a tribunal bundle containing:
- Your appeal statement
- CMS decisions and correspondence
- Income evidence (payslips, accounts, HMRC)
- Shared care proof (calendars, messages, school records)
- Bank statements
- Relevant legislation or guidance extracts
Your tribunal bundle should be organised, indexed, and clearly labelled. Judges prefer structured evidence.
If you discover additional evidence after submitting your appeal, you can provide it to the tribunal. Send any additional evidence as soon as possible rather than waiting until the hearing. Keep a complete copy of everything you send and make sure it is clearly identified so the tribunal can understand what it relates to.
Writing Your Tribunal Statement
Your statement should be factual, structured, and calm. Avoid emotional language. Explain:
- What decision you are appealing
- Why the decision is wrong
- What evidence supports your position
- What outcome you request
What Happens at the Tribunal Hearing?
Tribunals can be in-person, telephone, or video hearings.
The judge will ask questions about your case. The CMS may attend but often does not.
You can explain your evidence. You do not need a solicitor. Many parents represent themselves.
If you cannot attend the hearing, contact the tribunal as soon as possible and explain why. Do not assume that the hearing will automatically be postponed. If you do not attend, the tribunal may decide your appeal using your appeal form and the supporting evidence you have provided.
Possible Tribunal Outcomes
- CMS decision upheld
- CMS decision changed
- Case sent back to CMS for further consideration or recalculation
A tribunal decision may change the CMS decision, which could affect the child maintenance calculation and any arrears arising from that decision.
The tribunal will provide a written decision explaining the outcome. If you disagree with the decision, there may be further options in certain circumstances, including where there has been a legal or procedural error. Any further appeal or escalation has its own rules and time limits.
Common Mistakes Parents Make
- Submitting emotional rants instead of structured evidence
- Missing appeal deadlines
- Not sending evidence before the hearing
- Not understanding CMS calculation rules
- Failing to prove shared care properly
Is Legal Representation Required?
No. Many parents successfully appeal without lawyers. However, legal advice can be helpful in complex financial cases.
Important Disclaimer
This guide provides general information only and is not legal advice.
Child Support Advice is not affiliated with the CMS, DWP, or HM Courts & Tribunals Service. Using this website does not create a solicitor-client relationship.
You remain responsible for your own case, submissions, and evidence.