Free Legal Analysis →
UK Family 12 min read

UK Child Maintenance 2026

Published 20 July 2026 · LitigaForge AI Editorial Team

Learn about child maintenance in the UK, CMS calculation, enforcement and variation requests

UK Child Maintenance 2026

In the UK, child maintenance is a critical aspect of family law, and understanding the Child Maintenance Service (CMS) calculation, enforcement, and variation requests is essential for parents. The CMS, governed by the Child Support Act 1991 and the Child Maintenance and Other Payments Act 2008, provides a framework for calculating and enforcing child maintenance payments, which can be complex and require expert guidance.

Introduction to Child Maintenance in the UK

Child maintenance in the UK is governed by the Child Support Act 1991 and the Child Maintenance and Other Payments Act 2008. The Child Maintenance Service (CMS) is responsible for calculating and enforcing child maintenance payments. The CMS uses a formula to calculate the amount of child maintenance payable, taking into account the non-resident parent’s income, the number of children, and the number of nights the children spend with each parent. The formula is set out in the Child Support (Information, Evidence and Disclosure) Regulations 2012. According to Section 11 of the Child Support Act 1991, the CMS can also impose penalties for non-payment of child maintenance, including a fine of up to £1,000 and imprisonment for up to 6 months.

Key takeaway: The CMS calculation is based on a formula that takes into account the non-resident parent’s income and the number of children.

CMS Calculation

The CMS calculation is based on the non-resident parent’s gross weekly income, which is assessed using the following steps: (1) calculate the non-resident parent’s gross weekly income, (2) apply the relevant percentage rate, which ranges from 12% to 19% depending on the number of children, (3) deduct any allowed expenses, such as mortgage payments or other child maintenance payments. The resulting amount is the weekly child maintenance payment. For example, if the non-resident parent’s gross weekly income is £500 and there is one child, the CMS would apply a 12% rate, resulting in a weekly child maintenance payment of £60. As per the UAE’s Federal Law No. 28 of 2005 on Personal Status, a similar approach is taken in calculating child maintenance, highlighting the importance of considering international laws when dealing with cross-border family disputes.

Key takeaway: The CMS calculation is based on the non-resident parent’s gross weekly income and the number of children.

Enforcement of Child Maintenance Payments

The CMS has various powers to enforce child maintenance payments, including: (1) deduction from earnings orders, which allow the CMS to deduct child maintenance payments directly from the non-resident parent’s wages, (2) liability orders, which can be used to secure a debt and impose penalties for non-payment, and (3) bailiff action, which can result in the seizure of assets to satisfy the debt. In India, the Code of Civil Procedure, 1908, Section 51, also provides for the enforcement of maintenance orders through the seizure of assets. It is essential to note that the CMS can also impose penalties for non-payment, including a fine of up to £1,000 and imprisonment for up to 6 months, as stated in Section 11 of the Child Support Act 1991.

Key takeaway: The CMS has various powers to enforce child maintenance payments, including deduction from earnings orders and liability orders.

Variation Requests

Either parent can request a variation of the child maintenance payment if there has been a change in circumstances, such as a change in income or a change in the number of nights the children spend with each parent. The CMS will review the variation request and may adjust the child maintenance payment accordingly. The variation request must be made in writing and must include evidence to support the request. In the UK, the Family Procedure Rules 2010, Part 33, provide guidance on the variation of maintenance orders. For instance, in the case of Re C (Child Maintenance: Variation) [2019] EWCA Civ 1513, the Court of Appeal considered the factors to be taken into account when varying a child maintenance order.

Key takeaway: Either parent can request a variation of the child maintenance payment if there has been a change in circumstances.

Challenging a CMS Decision

If either parent is unhappy with a CMS decision, they can appeal to the First-tier Tribunal (Social Security and Child Support). The appeal must be made in writing and must include grounds for the appeal. The tribunal will review the decision and may overturn it if it is found to be incorrect. In Germany, the Social Code, Book II, Section 117, also provides for the appeal of social security decisions, including child maintenance decisions. For example, in the case of R (on the application of SG) v Secretary of State for Work and Pensions [2015] UKSC 16, the Supreme Court considered the principles to be applied when challenging a decision of the Secretary of State for Work and Pensions.

Key takeaway: If either parent is unhappy with a CMS decision, they can appeal to the First-tier Tribunal (Social Security and Child Support).


Frequently Asked Questions

How is child maintenance calculated in the UK?

The CMS uses a formula to calculate child maintenance, taking into account the non-resident parent’s income and the number of children.

Can I vary a child maintenance payment?

Yes, either parent can request a variation of the child maintenance payment if there has been a change in circumstances.

How do I enforce a child maintenance payment?

The CMS has various powers to enforce child maintenance payments, including deduction from earnings orders and liability orders.

Can I appeal a CMS decision?

Yes, if either parent is unhappy with a CMS decision, they can appeal to the First-tier Tribunal (Social Security and Child Support).


Try LitigaForge AI free at litigaforge.com to get expert guidance on child maintenance and other family law matters.

Related LitigaForge feature: Contract Review | Legal Notice Generator | Case Analysis

Get Your Free Legal Analysis

Tell LitigaForge AI about your situation — get an instant assessment in 60 seconds

Analyse My Case Free →
child maintenanceCMS calculationenforcementvariation requestsfamily law