CSA Meaning: The Agency That Closed and What Replaced It

CSA Meaning: The Agency That No Longer Exists

CSA Letters Still Arriving Years Later?

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CSA Meaning: What the Agency Was and What Replaced It

By Iblal IqbalPublished 25 September 2026Last reviewed 25 September 202613 mins read10 sections

CSA stands for the Child Support Agency, and the CSA meaning most people need today is a simple one: the agency no longer runs child maintenance cases. The Child Maintenance Service took that job over, and GOV.UK now sends anyone who asks for the old agency straight to the new service. So if a letter, a form or a well-meaning relative has told you the CSA will sort this out, that advice is out of date. Our child maintenance lawyers regularly advise and assist parents on both sides of that change, old CSA debts included.

This page covers England and Wales. The same statutory scheme runs in Scotland, with a few differences, and Northern Ireland has its own service (GOV.UK: eligibility).

Key takeaways

CSA means the Child Support Agency. It ran the statutory schemes set up under the Child Support Act 1991, s.1, which made each parent responsible for maintaining a qualifying child.
A different service handles it now. The Child Maintenance Service opened to all new applicants on 25 November 2013 (DWP announcement).
DWP closed the old cases on purpose. It began telling clients their case would close in June 2014, and confirmed in 2017 that liabilities in the remaining cases would end by 31 December 2018.
Money owed did not vanish. Remaining agency debt moved to the newer service for collection, which is why old letters still arrive.
The law never used the name. The Child Support Act 1991 gives the powers to the Secretary of State, not to any agency, so the label changed while the statute stayed put.
Court is not usually the route. Where the Secretary of State could make a calculation, a court cannot make, vary or revive a maintenance order (s.8(3)).

What does CSA stand for, and what is the CSA meaning?

CSA stands for the Child Support Agency. It was a government agency, not a court and not a charity, and it worked out how much a separated parent had to pay towards a child’s living costs. It opened in 1993 under the Child Support Act 1991, and for two decades its name became shorthand for the whole system.

Here is a detail almost nobody mentions. Search the full text of the Child Support Act 1991 and the words “Child Support Agency” do not appear once, so the statute never defines a CSA meaning. Calculation and collection powers belong to the Secretary of State, and the agency was only the office that used them. That is why the letters on your paperwork could change without a single line of the Act changing, and it is the first clue that the CSA meaning you remember is a brand rather than a legal body.

Two schemes ran under that name. The first began in 1993 and the second in 2003, each with its own way of working out payments. DWP still calls them “the previous 1993 and 2003 child maintenance schemes”, and the CSA meaning of that phrase is simply: the rules before this one.

CSA meaning today: who runs the scheme now?

The Child Maintenance Service, part of the Department for Work and Pensions, now runs the statutory scheme. It works out an amount, can arrange payments, can act when a parent does not pay, can settle arguments about parentage and can try to trace a parent whose address is unknown (GOV.UK).

You can see the handover in the web address itself. Typing gov.uk/child-support-agency lands you on the Child Maintenance Service guide instead. So what is the CSA now? In practice the CSA means one of three things: an old case that has closed, money still owed from one, or simply the wrong name for today’s service.

CSA meaning explained: a handwritten note reading pay child support on a kitchen table beside a cup of coffee — Old letters, new rules. Knowing which service holds your case is a calm place to start.

What is the Child Maintenance Service (CMS)?

The Child Maintenance Service (CMS) is the government service that works out how much child maintenance a separated parent should pay and, if needed, collects it. People who look up the CSA meaning, or want to claim CSA payments, usually need this service. The other route GOV.UK sets out is a private arrangement between the parents, which needs nobody else involved and can change with your circumstances.

It can take a case for a child under 16, or under 20 if they are in approved education or training. Either parent can apply, whether or not they live with the child, and so can the child’s guardian or a grandparent with main day-to-day care. The applicant must live in the UK as their main home and have the right to live here (GOV.UK: eligibility). One rule catches parents out. If a court made a maintenance order less than a year ago, nobody can apply to the CMS for that child until the year has passed (Child Support Act 1991, s.4(10)(aa)).

Once the service has worked out a figure from the paying parent’s circumstances, the money moves in one of two ways. With Direct Pay, the paying parent pays the other parent and nobody pays a collection fee. With Collect and Pay, the CMS takes the money from wages, a bank account, benefits or a pension and passes it on. Both parents pay for that: 20% is added for the paying parent and 4% comes off for the receiving parent (GOV.UK: payments). If a paying parent on Direct Pay does not pay in full and on time, the service can switch the case to Collect and Pay. It also reviews the amount every 12 months. Our guide explains how child maintenance is worked out.

What the CMS cannot do for you

The CMS cannot:

decide when your child spends time with each parent. GOV.UK treats seeing your child as separate from paying for them, and both parents stay responsible for the costs either way.
take a case where the child and the main carer live outside the UK, and usually not one where the paying parent lives and works abroad, though it may if they work for certain British employers such as the armed forces or a UK-registered company.
order school fees, a lump sum or property for a child. Those stay with the family court, as the section on what the agency could never decide explains.

To sign in to your CMS account, you need the 12-digit reference number printed on the service’s letters. You also need your National Insurance number and PIN.

How did the CSA end, step by step?

The change was gradual, which is exactly why so many parents missed it. These are the public milestones.

1991: the Act arrives. Parliament passes the Child Support Act 1991. Either the person with care or the non-resident parent may apply to the Secretary of State for a maintenance calculation (s.4(1)).
1993 and 2003: two agency schemes. The agency opens and later runs a second scheme alongside the first, with different rules for working out payments.
2012: a new scheme arrives. DWP introduces the Child Maintenance Service to run all child maintenance under the 2012 statutory scheme.
25 November 2013: the door opens. The newer service “opens to all new applicants today”, after a phased rollout that started with the largest families.
June 2014: closure letters start. In DWP’s own words, “in June 2014 we started telling CSA clients that their CSA case will close”. Fees and collection charges begin in the same month.
26 October 2017: the end date is confirmed. The closure programme had to end liabilities in remaining cases by the end of 2017; after a consultation, DWP confirmed a new end date of 31 December 2018, effective from 26 October 2017.
2021: the statistics stop. DWP publishes the final agency statistics, and remaining debt moves to the newer service for collection.

Nobody sent a single national letter saying “the CSA has gone”. The name simply fell out of use, one case at a time, which is why it survives in conversation years later.

What an old CSA case means for you now

Closing a case ended the ongoing liability. It did not wipe out what parents already owed. The Child Maintenance Service took over the arrears from the old schemes, which means a parent can still receive contact about a case that stopped years ago.

Paying parents. A closed case is not the same as a cleared balance. Ignoring a statement is the quickest way to turn an old figure into enforcement.
Receiving parents. Closure invited you to make your own arrangement or apply to the newer service. If neither happened, there may be no live calculation at all.
Either of you. The reference number on your letters tells you which service holds the case. That single detail decides who you speak to and which rules apply.

If you disagree with a decision on a live case, there is a route for that: ask for a mandatory reconsideration within 30 days, then appeal. Our guide to the child maintenance tribunal walks through what the panel looks at.

CSA meaning for your case: which scheme are you on?

Pick the line that sounds like you, then tick what is already true. Nothing here is a calculation, and your answers stay on your screen.

Which sounds like your case? It started with the old agency It is with the newer service, or it is new

Tick what is already true

Nothing you tick is saved or sent anywhere.

You know which service the letters about your case actually come from. The reference number on those letters is somewhere you can find it. It is clear whether money moves directly between you, or goes through the service. Someone has checked what was outstanding when the old case closed. The closure letters are still somewhere you can put your hands on. You know the service revisits the calculation once a year. You can list the changes you have to report straight away.

There is no score here. Anything you cannot tick yet is worth raising before your next payment date.

What your CSA and CMS letters cannot answer

Whether an old balance is still yours to deal with, and what happens if you say nothing.
Whether the statutory route suits your family at all, or whether an agreement between you would work better.
When the family court still has a part to play, and when it does not.

Those answers turn on your own facts, and they are far easier to sort out before a balance grows or a deadline passes.

Book a free initial consultation

One of our specialists will give you initial advice on your situation. It is a conversation, not a document service: it does not include drafting or reviewing paperwork.

What the agency could never decide

Neither the old agency nor today’s service ever covered everything. Where the Secretary of State could make a calculation, no court may make, vary or revive a maintenance order for the same child and parent (Child Support Act 1991, s.8(3)). Outside that box, the family court still matters.

Very high earners, where the statutory formula runs out. See our guide to top-up orders above the maximum calculation.
Support for a disabled son or daughter who is no longer a child for these purposes, covered in maintenance over 18 for disabled children.
School fees, lump sums and property for a child, which sit under Schedule 1 of the Children Act 1989.

A free initial consultation is a conversation with a specialist who gives you initial advice on your circumstances. It does not include drafting or reviewing documents. Before the call, it helps to have your letters, any reference number and a rough idea of the other parent’s work situation.

Frequently asked questions

What does CSA mean on a letter about your case?

CSA means the Child Support Agency, the office that used to run statutory child maintenance. On a letter it usually points to an old case or to money still owed from one, because the agency stopped taking on new work long ago. Today’s letters come from the Child Maintenance Service instead, so check the name and reference number at the top before you reply.

Does the CSA still exist?

Not as a live service you can apply to. DWP began closing its cases in June 2014, confirmed in 2017 that remaining liabilities would end by 31 December 2018, and published the final agency statistics in 2021. The name survives in conversation and on old paperwork, but the Child Maintenance Service does the work.

Can I still apply to the CSA?

No. Every new statutory application now goes to the Child Maintenance Service, which opened to all new applicants on 25 November 2013. GOV.UK redirects the old agency address to the new service guide. You can also agree an arrangement privately with the other parent, which GOV.UK sets out as the first of the two options.

What happens to arrears from an old case?

Closing a case did not write them off. Debt left on the old schemes moved to the Child Maintenance Service for collection, and DWP publishes separate figures on collections and write-off for those arrears-only case groups. If someone is chasing you for an old balance, or the other parent owes you one, take advice before you agree anything.

Did the CSA cover the whole of the UK?

Not quite. DWP runs the statutory scheme across Great Britain, so Scotland shares it, with differences of its own: a child over 12 can apply there in their own right. Northern Ireland runs its own Child Maintenance Service, with a separate phone number and a separate postal address.

Still getting letters about an old case? Get advice before your next payment date

An old balance does not fade away, and a case that closed years ago can still reach you. Equally, a parent who assumed the statutory route was running may find there is no live calculation at all. Book a free initial consultation and one of our specialists will give you initial advice on where you stand.

Book a free initial consultation or call 0330 094 5880

You can also return to our guide for child maintenance lawyers.

General information about the law in England and Wales, not advice on your circumstances.

Expert Tip

Parents still say CSA when they mean the whole system, and that habit costs time. Before you ring anyone, find the most recent letter and read the name and reference number at the top. That tells you which service holds the case, which rules apply and whether a balance is live. Starting with the right office is the difference between a five-minute answer and a month of phone transfers.

Iblal Iqbal, Partner & Family Law Strategist