This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Clear, detailed guide on how child maintenance is calculated and enforced in England and Wales: explains the Child Maintenance Service's six‑step calculation process, how shared care and other children affect payments, how payment plans work, and statutory enforcement options including deductions and liability orders.
Child maintenance is the legal obligation for a non‑resident parent to provide financial support for a child's everyday living costs. In England and Wales, when separated parents cannot reach an agreement about payments, the Child Maintenance Service (CMS) - a government agency - calculates the amount due and can enforce payments through statutory procedures. This article explains how maintenance is calculated, the factors that influence the amount, the enforcement mechanisms available when payments are missed, and the legal framework that governs the process.
What Is Child Maintenance?
Child maintenance is ongoing financial support paid by a parent who does not have the main day‑to‑day care of a child (the paying parent) to the parent or carer with whom the child lives most of the time (the receiving parent). It is intended to help cover essential costs such as food, clothing, accommodation and other everyday needs. Parents can make private agreements, but where they cannot agree, the CMS can calculate and manage payments.
Statutory Calculation of Maintenance
How the CMS Works Out Payments
The Child Maintenance Service uses a structured six‑step process to calculate the weekly maintenance amount, using current financial information about the paying parent. This calculation remains in effect until the next annual review or a relevant change of circumstances is reported.
Step 1 – Gross Income
The CMS first determines the paying parent's gross yearly income (before tax and National Insurance) using information from HM Revenue & Customs (HMRC). Benefits and student grants generally do not count as income.
Step 2 – Income Adjustments
The service looks at factors that may affect this gross income - for example, pension contributions or other children in the paying parent's household. Adjustments are converted into a weekly figure for calculation.
Step 3 – Child Maintenance Rate
One of several statutory rates is applied based on gross weekly income:
- Nil rate – if income is below £7 per week.
- Flat rate – for lower levels of income or certain benefit recipients.
- Reduced rate – for gross weekly incomes between certain bands.
- Basic rate – for most paying parents with gross weekly income in a determined range.
- Basic Plus and higher considerations apply in limited scenarios, such as shared care.
Step 4 – Other Children
Payments for other children the paying parent supports (whether statutory or agreed privately) are taken into account, reducing the income considered for the current maintenance calculation.
Step 5 – Weekly Amount
Using the rate and adjusted figure, the CMS calculates a weekly amount for child maintenance. For example, the basic rate applies a percentage of weekly gross income - 12% for one child, 16% for two and 19% for three or more children.
Step 6 – Shared Care Adjustments
If the child spends overnight stays with the paying parent, the CMS reduces the weekly amount proportionately. For example, 52–103 nights per year may lead to a reduction of a portion of the liability.
The Payment Plan
Once calculated, the CMS issues a Payment Plan that shows:
- The weekly maintenance amount.
- How often payments must be made (usually weekly or monthly).
- The start and end date of the payment cycle (normally covering a 12‑month period).
- Instructions on how to pay.
Receiving parents and paying parents are informed of the plan and its details. It allows both parties to understand their obligations and schedules clearly.
Collection and Enforcement of Payments
Ways the CMS Can Collect Maintenance
The CMS can manage payments in two main ways: Direct Pay and Collect and Pay:
- Direct Pay: The paying parent pays the receiving parent directly according to the Payment Plan.
- Collect and Pay: The CMS collects the maintenance from the paying parent and passes it to the receiving parent, often with administrative charges added under regulations.
Enforcement Powers
If a paying parent fails to pay the required amount in full and on time, the CMS has a range of enforcement tools at its disposal. These are designed to ensure compliance with court‑recognised maintenance obligations.
Deduction from Earnings Order
The CMS can instruct the paying parent's employer to deduct the child maintenance directly from wages or pensions before they reach the individual's bank account. This does not require the paying parent's consent.
Deduction from Benefits
For parents receiving certain state benefits, the CMS can arrange for child maintenance to be deducted from these payments before they are paid out.
Bank Account Deductions
Orders can be made to take money directly from the paying parent's bank or building society account to cover missed payments or arrears.
Liability Orders
Where payments remain unpaid, the CMS can apply to the family court for a liability order. This court order establishes the amount owed as a legal debt, enabling the CMS to pursue further legal action, register the debt in the Register of Judgments, Orders and Fines, and take additional enforcement steps. Liability orders can also affect the paying parent's credit rating.
Other Legal Actions
In persistent or severe cases, the CMS may take further action such as instructing bailiffs or applying for a charging order against property, though these are typically later stages of enforcement once liability is established.
Failure to Comply and Consequences
Failing to provide accurate information to the CMS, or providing false information, can lead to fines or legal action under child support legislation. The CMS monitors compliance, and non‑cooperation with information requests can trigger enforcement procedures.
Parents should inform the CMS of changes in address, income or employment promptly to ensure the maintenance calculation remains accurate and enforcement does not escalate due to misunderstandings.
Practical Considerations for Parents
Reporting Changes
Both paying and receiving parents have a duty to inform the CMS of significant changes in circumstances, such as changes in income, employment or shared care arrangements. Failure to do so may result in an inaccurate maintenance calculation and potential disputes.
Appeals and Reconsiderations
If either parent disagrees with how the CMS has calculated child maintenance, they can request a mandatory reconsideration before progressing to an appeal. It is important to provide evidence supporting any assertion that the calculation is wrong.
Family‑Based Agreements
Parents may choose to agree privately on maintenance amounts outside the CMS calculation. These family‑based arrangements offer flexibility but are not enforceable through CMS enforcement powers unless formalised in a consent order through the family court.
Common Questions
How often is maintenance reviewed?
Child maintenance calculated by the CMS normally undergoes an annual review to reflect changes in income, shared care or number of children. Parents should report relevant changes to ensure the amount remains fair and accurate.
What if a paying parent has multiple obligations?
The CMS accounts for other children the paying parent is responsible for, reducing the income considered in the current calculation to reflect wider obligations.
Can the court order extra maintenance beyond the CMS calculation?
If a paying parent's gross weekly income exceeds the statutory limits (e.g. above a certain threshold), the receiving parent may apply to the family court for a maintenance order that provides additional support not covered by the standard CMS formula.
Key Takeaways
In England and Wales, child maintenance calculations are made by the Child Maintenance Service using a detailed process based on the paying parent's gross income, other financial commitments, and shared care arrangements. The CMS issues a Payment Plan and enforces payments where necessary through statutory measures such as deductions from earnings, benefit deductions, bank account orders and liability orders. Parents must provide accurate financial information and co‑operate with the CMS to ensure fair and timely maintenance support. Understanding how calculations and enforcement mechanisms work helps parents fulfil legal obligations and secure reliable financial support for children's needs.
