Can the Other Parent Spend Child Maintenance on Themselves?

This is one of the most asked questions in the whole child maintenance system, and one of the angriest. A paying parent watches the money leave their account every month and suspects it is going on a car, a holiday or a new partner rather than the child. So they ask what the rules are.

The answer is short, and many people do not like it. There are no rules.

What the law actually says about spending

Child maintenance is paid under the Child Support Act 1991 and worked out under the Child Support Maintenance Calculation Regulations 2012. Read both from beginning to end and you will not find a single provision that says what the money must be spent on, requires the receiving parent to keep records, or gives the paying parent any right to see them.

That is not a drafting gap. The legislation creates a duty on one parent to pay a sum of money to the other. It does not create a trust fund, a ring fenced account or a set of approved categories. Once the payment arrives, it is the receiving parent's money to spend as they see fit within their own household.

Legally, child maintenance is a contribution to the general costs of raising a child. Those costs are broad by design: housing, heating, food, clothing, school uniform, travel, and the ordinary running of the home the child lives in. Our guide to what child maintenance is meant to cover goes through that in more detail.

The CMS will not investigate, and cannot

Parents ring the CMS every day asking for an investigation into spending. Caseworkers cannot open one, because it is not part of the service's job.

The statutory remit of the CMS is narrow. It calculates the figure, it collects the money if you are on Collect and Pay, and it enforces payment when someone does not pay. That is the whole list. There is no audit function, no spending compliance team and no power to demand an account from a receiving parent. Nothing in the Child Support Act 1991 gives the department that power, so no official inside it can use it.

It also has no capacity for it. DWP figures to March 2026 put the caseload at around 810,000 arrangements, split roughly 55% on Direct Pay and 43% on Collect and Pay. The service is built to process volume against a formula, not to examine household budgets one by one.

The calculation ignores spending completely

This is the part that catches people out. The figure is arithmetic, not judgement.

At the basic rate, the CMS takes a straight percentage of gross weekly income.

Notice what is missing. The formula does not ask what your child actually costs. It does not ask what the receiving parent earns. It does not ask what the money gets spent on. It takes an income figure, usually straight from HMRC, applies a percentage and produces a number. Our breakdown of how child maintenance is calculated walks through each stage, and the calculator runs the same formula on your own figures.

Because the calculation never looks at spending, disapproving of the spending cannot change the calculation. There is no box for it.

What does change the figure

Only the statutory factors move the number:

• Gross income. What counts, and what does not, is set out in the regulations. See what counts as income for child maintenance.
• The number of qualifying children.
• Shared care nights. Overnight stays reduce the figure in bands. Our guide to how shared care affects the calculation sets out the thresholds.
• Other children living in the paying parent's household. This reduces the income the percentage is applied to.
• Variation grounds. A defined list, including unearned income, diversion of income and certain special expenses. The variation checker tells you whether any of them apply to you.

Spending is not on that list, and there is no residual discretion to add it.

The household overhead point most people miss

Here is the honest part, and it cuts against the instinct on both sides.

A large share of what a child genuinely costs is household overhead, and overhead does not itemise per child. Rent or a mortgage does not come with a line saying which portion is the child's bedroom. Energy bills do not separate the heating a child uses from the heating a parent uses. Council tax, water, broadband, insurance and the cost of running a car to school and back are all whole household costs that exist because the household exists.

So money that looks like it is being spent on the parent is very often paying for the roof the child sleeps under. A parent who moves to a bigger property so each child has a bed is spending child maintenance on the child, even though the transaction on the bank statement says letting agent. Bills paid from a joint account, a food shop that feeds everyone, a car that does the school run: none of it separates cleanly.

That is the practical reason the law does not attempt to police it. Any honest accounting exercise would collapse almost immediately into an argument about how to apportion a gas bill.

Can you take it to court instead?

Generally no. Section 8 of the Child Support Act 1991 removes the courts' jurisdiction over child maintenance in most cases. A family judge cannot set your maintenance figure, and cannot order a receiving parent to produce an account of spending in place of the CMS.

The narrow exceptions to section 8 are things like top up orders where income is above the CMS ceiling, school fees, costs relating to a child's disability, and consent orders both parents agree to. None of them is a route to an audit of household spending.

There is no application form, tribunal or ombudsman that will compel a receiving parent to itemise where the money went. The First-tier Tribunal hears appeals about the calculation, not about spending. The Independent Case Examiner looks at how the CMS treated you, not at what the other parent bought.

Why the system was built this way

Two reasons, and neither is a secret.

The first is administrative simplicity. The 2012 scheme was deliberately designed as a formula that a computer can run against an HMRC income feed. Adding a spending test would mean reviewing hundreds of thousands of household budgets a year, with an appeal route attached to every one. The system that already struggles to collect the money would grind to a halt.

The second is that the state would have to start adjudicating family budgets. Someone would have to decide whether a holiday counts, whether a haircut counts, whether a bigger flat counts. Parliament chose not to put a government department in that role.

The transparency angle

This is one of the most common complaints paying parents make about the system, and it is worth being straight about the evidence.

There is no published data on how often child maintenance is misused, because no public body collects it. The DWP does not measure it. The CMS does not record it. No statistic exists in either direction, so anyone quoting a figure for how much maintenance is spent on the child is making it up.

What the department does measure is money that never arrives at all. Around £791.2 million of unpaid maintenance has accumulated across the CMS since 2012. That gap is measured, published and debated. The spending question is not measured at all, and the absence of any accounting mechanism is a design choice made in 1991 and kept in 2012, not an oversight waiting to be fixed.

Genuine welfare concerns are a different route

There is an important line here, and it needs stating clearly.

If you believe a child is being neglected, is going without food, or is not safe, that is a safeguarding matter and it has nothing to do with the CMS. Contact children's services at the local council where the child lives. If a child is in immediate danger, call 999.

Children's services have statutory duties under the Children Act 1989 and can act. The CMS has none of those powers and will not pass a concern on for you. Raising a safeguarding worry with a maintenance caseworker will achieve nothing except delay.

What you can actually do

If you are a paying parent with concerns, the realistic options are limited but they are not nothing.

• Check the calculation is right. Errors in income, shared care nights or the number of children are common and they are fixable. Spending is not.
• Check whether a variation applies. If your own circumstances have changed, that is a statutory ground and it can move the figure.
• Buy things directly where the other parent agrees. Some parents agree that certain payments, such as school trips or a phone contract, are made directly. This only works by agreement, and on Collect and Pay it will not usually count towards your liability unless the CMS accepts it.
• Complain about CMS service failure, not about spending. If the service has handled your case badly, our complaints letter generator puts it in writing and copies your MP. A complaint about the other parent's spending will be closed with no action.

If you are a receiving parent, you do not have to justify your spending to anyone, and a demand for receipts has no legal force. It is also worth knowing that nothing stops you sharing information voluntarily if you think it would reduce conflict. That is a choice, not a duty.

This article is information, not legal advice. If your situation involves safeguarding, a disputed calculation or enforcement action, get advice from a solicitor or a service such as Citizens Advice.