Family law guide
Part of: Financial Settlement after Divorce
Child maintenance tribunal is usually the last place a parent would like to end up in over financial support. Quite often a parent may not agree with a child maintenance decision which has been made. If you have a decision which has been made and you feel there may have been a mistake in reaching this decision by the Child Maintenance Service then you may be able to request for the decision to be reconsidered. This process is known as the mandatory reconsideration.
The time limit for asking for a mandatory reconsideration is 30 days from the date of the letter that told you about the decision. You will only be able to make an appeal once the Child Maintenance Service has reconsidered the decision. Skip this step and the tribunal cannot hear your case, while the decision you think is wrong stays in force. The child maintenance tribunal may accept late appeals where there are good reasons after the one month time limit. In such a case the other parent may be asked to confirm whether they object to the appeal being accepted.
The child maintenance tribunal is also known as the Social Security and Child Support Tribunal. For parents who need to understand the child maintenance tribunal process, especially if they are thinking about challenging a Child Maintenance Service decision, it deals with appeals that reach it within one month of the date the mandatory reconsideration notice was sent to you, and a late appeal can still be made up to 13 months from that date if you give reasons for the delay (Tribunal Procedure Rules 2008, r.22). This guide explains what the tribunal is, when you can appeal a child maintenance decision, how to appeal, how to prepare for a hearing, and how family lawyers can help where a decision affects your financial responsibilities and the support arrangements for your child. There is no tribunal fee to appeal a CMS decision, and the process is designed to be accessible.
To challenge a child maintenance decision, you first ask the Child Maintenance Service to look at it again, and only then appeal to the tribunal. The law sets that order: a right of appeal can depend on the CMS first considering whether to revise its decision (Child Support Act 1991, s.20(2A)).

The other parent is part of the appeal too. HMCTS writes to them and asks whether they want to take part in the hearing (HMCTS guidance SSCS2A). If your 30 days are already running, book a free consultation and a family lawyer can go through the decision letter with you before you send anything.
In order to make an appeal to the child maintenance tribunal you will need to complete the form SSCS2. When completing the form, you should include your 12-digit reference number on all correspondence and forms to ensure your case is correctly identified and processed. You will also need to confirm whether you want your appeal to go to a tribunal hearing to allow you to explain your case or whether you want your appeal to be heard on the form and based on supporting evidence you provide.
After submitting your appeal you will be able to provide your supporting evidence which will be considered by a judge who will then make a decision. If you are sending documents by post, use the post office and keep proof of postage for your records. The appeal process usually takes around 6 months for your appeal to be heard by the tribunal. Whilst the child maintenance decision is reviewed, or during the appeal, the original decision stays in force. This means the parent making the child maintenance will pay the amount stated and on the dates given until the issue is resolved.
A parent is able to appeal a decision if one or more of the following situations apply:
For example, if the CMS decision was made using outdated income information, you may have grounds to appeal.
Parents may quite often not be happy with the way their child maintenance matter has been dealt with and may be considering an appeal. However it is important to note that a parent will not be able to make an appeal to a child maintenance decision in the following circumstances:
A change in personal circumstances is not a valid ground for an appeal to the child maintenance tribunal. Where circumstances change a parent can ask the Child Maintenance Service to alter a child maintenance calculation once the new changes have been taken into account. The CMS uses gross income figures, often obtained from HM Revenue and Customs (HMRC), to recalculate payments. Changes affecting maintenance should be reported as soon as possible. A paying parent must report a change of address within 7 days. Where the CMS has asked them to, they must also report a new job or a pay rise of 25% or more within 14 days (Child Support Information Regulations 2008, regs 9 and 9A). These changes can be reported through your online account or by phone, and failing to report relevant changes can lead to a fine of up to £1,000.
Changes of circumstances include:
The CMS can backdate some changes to the child maintenance calculation. A parent can also request a variation for special expenses, including contact costs for keeping in touch with children and certain expenses linked to a sick or disabled child. Those expenses usually come off gross income only from the week you apply (Child Support Act 1991, s.17(4)).
Additionally, changes in shared care arrangements, such as the number of nights the child spends with each parent, can also affect the calculation.
Quite often parents may feel anxious and stressed about a tribunal hearing regarding child maintenance. Preparation is a key factor for a child maintenance tribunal hearing. Parents often list and make a note of key points which include details of evidence they have, evidence of noncompliance of the other parent, discrepancies in accounting records and discrepancies in the information provided to the tribunal and the Child Maintenance Service by the other parent. You may also need to provide information about financial arrangements or debts with your former partner, including any legal costs incurred during separation. Copies of your evidence should also be prepared for the tribunal so they can navigate through the documentation during your hearing.
It is ideal to take notes during the tribunal hearing which will give an opportunity to dispute false allegations and ask further questions. You could also use these notes as a summary of your hearing.
Prior to the tribunal you should also prepare questions which you would like to be addressed at the hearing. If you are able to consider what the other parent is likely to say and what objections if any they will be raising you will be able to prepare better for the tribunal and will equip yourself with the responses and answers you need.
At the tribunal hearing you should ensure you stick to the relevant financial information and history. The tribunal is not concerned with your past relationship with the other parent or the reasons for you splitting up.
Child maintenance tribunals are similar to other court processes you may have been involved in, such as a child arrangements case. A tribunal judge usually decides the appeal alone. Where it may need financial accounts examined, an accountant can sit with the judge as a second member (Senior President of Tribunals, Practice Direction, May 2024). The purpose of the tribunal is to consider whether the child maintenance decision made by the Child Maintenance Service is correct. Any evidence which you have provided which may confirm that the Child Maintenance Service have made an error in calculating child maintenance payments will be considered together with the financial position of both parents. The tribunal will also take into account the cost of supporting the child and any variations in the amount of child maintenance paid, including factors such as benefits and overnight stays.
The judge may review how much the paying parent is required to pay child maintenance each week, considering the needs of the receiving parent and any relevant circumstances. If the decision is deemed to be incorrect then a further calculation will be provided which will confirm the weekly amount the paying parent must pay maintenance.
It is important to note that a parliamentary and health service ombudsman is the final stage in the complaints process. The ombudsman will be responsible for complaints about the Child Maintenance Service. An ombudsman will only consider a complaint which is through your local MP and cannot be approached directly.
Prior to taking your complaint to the ombudsman you must have exhausted all of the other avenues from the complaints process. The complaints process is as follows:
If the above does not resolve your complaint then you are able to take your complaint further by contacting your MP. Your MP will be able to take your complaint with the Child Maintenance Service on their behalf. The Child Maintenance Service have a special unit to deal with correspondence from MPs and will usually process this quicker.
You can also make a complaint to the independent case examiner, within 6 months of the DWP complaints team’s final response. This case examiner will not be a part of the Child Maintenance Service. They will suggest ways to reach an agreement with the Child Maintenance Service and should make recommendations about what should be done to resolve your complaint. Following which an ombudsman can be contacted if the complaint is still not reasonably dealt with.
We regularly advise and assist parents who want to challenge a child maintenance decision, from the reconsideration request to the tribunal hearing. Where a parent feels an incorrect decision in relation to child maintenance has been made, family lawyers can provide you with the advice and assistance you need. Our family lawyers in York as well as nationally deal with all aspects of child maintenance and are able to advise you on how much child maintenance you are likely to receive based on the information you supply.
If you already have a decision on child maintenance payments and feel the decision is not accurate, we can assist you in contacting the Child Maintenance Service requesting them to reconsider their decision. If the CMS accepts your variation request, they will notify you of the new arrangement; however, if you disagree with the outcome, a lawyer can help you challenge the decision. Failing which we can provide you with advice and guidance on the appeals process and prepare you for any child maintenance tribunal hearing you may have. Child maintenance lawyers can advise you on the likelihood of successfully appealing a Child Maintenance Service assessment and prepare you for the appeals process.
Where the parent paying the child contribution is failing to make the payments as required, our family law specialists can assist you in contacting the Child Maintenance Service to ensure enforcement of the payments.
Our family lawyers advise and assist parents with child maintenance disputes, including whether and how to challenge a CMS decision. The time limits are short. You have 30 days to ask for a mandatory reconsideration, then one month to appeal from the date the notice is sent. The tribunal also looks only at the circumstances when the CMS made its decision (Child Support Act 1991, s.20(7)(b)). Missing a deadline, or sending evidence about the wrong period, can leave the wrong figure in place for months. If you want to dispute a child maintenance decision, call us on 0330 094 5880 or book a free consultation before your deadline passes. You can otherwise book a time that suits you.
8 of 29 guides — scroll sideways for more
Child Custody Specialists
Sibling Contact Orders: Protecting the Bond Between Brothers and Sisters
Child Maintenance Tribunal
Applying for a Child Contact Order
Article 21 Hague Convention – International Child Access
Reasons To Stop Child Contact
Reasons why a fathers access to children should not be restricted
Short videos from the Kabir Family Law team, explaining family law in plain English.
We are a team of legally trained family law and divorce specialists with years of experience across all areas of family law. We are not part of a firm of solicitors, do not undertake legal reserved activities unless permitted and are therefore entirely independent. Please subscribe to our mailing list.
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