Guide · Updated 07/07/2026
Arrears: check before you accept
An arrears figure is not a fact of nature — it is the arithmetic product of every liability decision and every payment record on your case. If any input is wrong, the arrears are wrong. Treat every arrears notice as a claim to be verified, whichever side of it you are on.
How arrears legitimately arise
- Missed or short payments on Collect & Pay or Direct Pay;
- The gap between the initial effective date (when the paying parent was first notified) and the first payment — weeks or months of liability can accrue while the CMS processes the case, entirely lawfully;
- Backdated recalculations — an annual review or corrected decision applied retrospectively;
- Variation decisions taking effect from an earlier date.
How phantom arrears arise
- Direct Pay payments made and received but recorded as missed — the CMS holds no payment data for Direct Pay, so a dispute becomes evidence-versus-assertion;
- Reported changes never actioned, leaving liability running on stale figures;
- Corrected decisions not flowed through the arrears ledger;
- Allocation errors — payments credited to the wrong period or the wrong element (fees v maintenance v arrears).
Step one, always: the full breakdown
You are entitled to understand the debt. Demand, in writing, a complete arrears breakdown showing: each liability amount and the decision it flows from; each payment received and the date credited; each charge added; and a running balance. The template letters page has wording. Reconcile it line-by-line against your bank records. If the CMS cannot produce a coherent breakdown, say so in writing — that failure itself supports both a challenge and a complaint.
Arrears cannot be "appealed" as a lump. What can be challenged are the decisions that generated them — the calculation, a supersession refusal, an effective date. A revised decision automatically re-computes the arrears. Check each underlying decision with the self-assessment; note that official-error revision has no time limit, which matters for old arrears built on old mistakes.
Negotiating repayment
The CMS aims to recover arrears within two years on top of ongoing maintenance, but schedules are negotiable against evidenced means. Put a realistic offer in writing, with a budget. Keep paying the ongoing liability come what may — arrears negotiations collapse when current maintenance stops. Receiving parents: you can ask the CMS to prioritise collection and escalate enforcement; you can also, if you choose, agree to write off arrears owed to you (never feel pressured to — the choice is entirely yours).
Write-off: rare, but real
Under the Management of Payments and Arrears Regulations 2009 (as amended by the 2018 compliance and arrears strategy), the CMS can write off arrears in limited cases — for example where the receiving parent consents or cannot be traced after proper efforts, where the paying parent died without recoverable estate, or historic CSA-era debts that went through the 2018–19 representation exercise. Modern 2012-scheme arrears owed to a receiving parent are not written off merely because they are old or the parent is unemployed. Be sceptical of anyone selling "arrears removal" services.
Interaction with insolvency
Child maintenance arrears are not released by bankruptcy or a debt relief order — they survive. Include them in any debt advice conversation, but do not expect insolvency to clear them.
Sources
| Source | Type | Date | Credibility |
|---|---|---|---|
| Child Support (Management of Payments and Arrears) Regulations 2009 | Primary legislation (SI) | As amended | High |
| Commons Library CBP-7774 — Arrears and enforcement | Parliamentary briefing | Current | High |
| DWP — Compliance and arrears strategy (consultation response) | Primary (government policy) | 2018 | High — note age |
| Citizens Advice — If you owe child maintenance | Charity guidance | Current | High |