Guides

Plain-English guides to every stage, from the first CMS letter to the Upper Tribunal. Read them in order or jump to the one you need.

  • Child maintenance explained

    What the Child Maintenance Service is, who counts as the paying and receiving parent, how money changes hands and what happens after someone applies.

  • How the calculation works

    The four steps of a CMS calculation in plain English, with the current rates, worked examples and the mistakes worth checking for.

  • Shared care and overnight care

    How the CMS counts nights, which evidence it accepts when parents disagree, and how to make sure the right shared care band is used.

  • Equal care and day to day care

    When care is shared equally, the question is not just nights. Regulation 50 decides who, if anyone, is the paying parent. Here is how it works and how to evidence it.

  • Variations: special expenses and additional income

    How either parent can ask the CMS to adjust the standard formula for costs such as contact travel, or for income that the standard calculation misses.

  • Changes of circumstances and the annual review

    Which changes you must report, when a recalculation happens, how the annual review works and why a change is not the same as an appeal.

  • Mandatory reconsideration

    The compulsory first step before you can appeal a CMS decision. How to ask, what to include, and what to do when the answer comes back.

  • Appealing to the First-tier Tribunal

    How to complete and send form SSCS2, what the tribunal can and cannot do, and what happens between sending your appeal and the hearing.

  • The DWP response and directions

    How to read the appeal bundle DWP sends, how to reply to it, and what to do with directions from the tribunal.

  • Evidence and written submissions

    How to organise evidence into a bundle a judge can use, and how to write a submission that makes your case in a few clear pages.

  • The hearing: what to expect

    Who will be there, how the hearing runs, how to give evidence and ask questions, and how to prepare in the week before.

  • After the decision

    Decision notices, statements of reasons, setting aside, corrections and appealing to the Upper Tribunal on a point of law.

  • Arrears and enforcement

    How arrears build up, what the CMS can do to collect them, the fees involved, and what to do if you cannot pay or are not being paid.

  • Complaints, the Ombudsman and compensation

    When to complain rather than appeal, the stages of the CMS complaints process, the Independent Case Examiner, the Ombudsman and asking for money back.

  • Getting your records: subject access requests

    How to get copies of what the CMS and DWP hold about you, including call recordings and case notes, for free.

  • Child arrangements and the family court

    How child arrangements orders work in England and Wales, the steps from mediation to final hearing, and how a court order affects the CMS.

  • Looking after yourself

    Representing yourself is draining. Practical ways to protect your time, money and mental health, and where to turn if things feel too much.

Not sure where to start?

The Start here page helps you work out which guide fits your situation, and what to do first.

This is information, not legal advice. It explains how the system generally works in England, Wales and Scotland. Your situation may be different. Check the official guidance on GOV.UK and get free advice from the organisations on our Get help page before making important decisions.