Quick Summary: If HMRC refuses your child benefit claim, stops your payments, decides against you in a disputed custody claim, or demands repayment of an overpayment, you have the right to challenge the decision. The process has two stages: first, mandatory reconsideration using form CH24A, which must be requested within one month of the decision (extendable to a 13-month absolute limit in some cases); and second, if you remain unsatisfied, an appeal to the independent First-tier Tribunal (Social Entitlement Chamber) using form SSCS5, within one month of the mandatory reconsideration notice. This is entirely separate from disputing the High Income Child Benefit Charge tax assessment — that follows HMRC’s tax appeal route, not this one. This guide covers the full process end to end.

Table of Contents

1. Which Decisions Can Be Appealed
2. The Two-Stage Appeals System Explained
3. Step 1: Mandatory Reconsideration — Form CH24A
4. Mandatory Reconsideration Deadlines
5. What Happens During Mandatory Reconsideration
6. Step 2: Appealing to the First-tier Tribunal — Form SSCS5
7. How to Complete Form SSCS5
8. The Appeal Bundle: What HMCTS Sends You
9. Disputed Claims: When Another Person Is Involved
10. What Happens If HMRC Revises the Decision Before the Hearing
11. Preparing for Your Tribunal Hearing
12. Oral Hearing vs Paper Hearing
13. What Happens at the Hearing
14. After the Tribunal Decision
15. Appealing Further: The Upper Tribunal
16. Common Types of Child Benefit Appeal
17. Late Appeals: What Happens If You Miss a Deadline
18. Getting Help and Representation
19. How This Differs From a HICBC Tax Dispute
20. Frequently Asked Questions

Which Decisions Can Be Appealed

Not every letter from HMRC about child benefit carries a right of appeal, but the most common decisions that do include:

Your decision letter must tell you whether you have a right of appeal — this is a legal requirement. If your letter says you do not have a right of appeal but you believe HMRC has made an error, you can still ask HMRC to look at the decision again informally, or seek advice from Citizens Advice about whether the letter is correct on this point.

Why Not Every HMRC Letter Carries Appeal Rights

It is worth understanding why some HMRC communications about child benefit do not carry a right of appeal, since this distinction trips up many claimants. Generally, appeal rights attach to formal decisions about entitlement, amount, or recovery — the kinds of determinations that directly affect what you receive or owe. Purely informational letters, general reminders about reporting changes of circumstances, or preliminary enquiries asking you to provide further information before a decision is made typically do not themselves carry appeal rights, because no decision has yet been made that could be appealed.

If you are unsure whether a particular letter carries appeal rights, the safest approach is to read the specific wording in the “if you disagree with this decision” section (or equivalent) of the letter itself, and if it is genuinely ambiguous, contact HMRC or Citizens Advice to clarify before the relevant time limit expires. Acting promptly to clarify this is far preferable to assuming you have more time than you do, only to discover later that a clock was already running from the date of the original letter.

The Two-Stage Appeals System Explained

For decisions made on or after 6 April 2014, child benefit appeals follow a mandatory two-stage process. The first stage is to ask HMRC to reconsider their original decision — mandatory reconsideration. The second stage is to appeal to the First-tier Tribunal, a process sometimes referred to as “direct lodgement” because the appeal goes directly to the independent tribunal rather than through HMRC’s own internal escalation.

You cannot skip stage one. The First-tier Tribunal will not accept an appeal unless you have first been through mandatory reconsideration and received a Mandatory Reconsideration Notice (MRN) — except for Tax Credit decisions, which historically had a different rule, though Tax Credits are now largely replaced by Universal Credit for new claims.

Why the Two Stages Exist

The mandatory reconsideration stage exists to give HMRC the opportunity to correct straightforward errors quickly, without the cost and delay of a full tribunal hearing. In practice, a meaningful proportion of cases are resolved at this stage — HMRC reviews the original decision, considers any new information or evidence you provide, and either upholds, varies, or overturns it.

The Pre-2014 System: Why the Date Matters

Before 6 April 2014, the appeals system worked differently — a claimant could appeal directly to the tribunal without first going through a separate mandatory reconsideration stage, and the tribunal itself had discretion over whether to accept late appeals. The system was reformed across the social security and tax credit landscape from April 2014 onwards specifically to introduce the mandatory reconsideration filter, with the explicit policy aim of resolving more disputes without the cost of a full tribunal hearing and reducing the volume of cases reaching HMCTS.

This means that if you are dealing with a very old decision — for example, a historic overpayment dispute relating to a decision made before April 2014 that has resurfaced — the procedural rules that originally applied to that decision may differ from the current process. In almost all practical cases in 2026, however, you will be dealing with the post-2014 two-stage system described throughout this guide, since decisions from over a decade ago are rarely the subject of fresh appeals unless HMRC has recently reopened or reissued them.

Why Understanding Both Stages Matters Even If You Expect to Win at Stage One

Even where you are confident your mandatory reconsideration request will succeed, it is worth understanding the full two-stage process from the outset. This is because the deadlines run consecutively and are unforgiving — if your mandatory reconsideration is unsuccessful, you will have only one month from that point to prepare and submit a full tribunal appeal. Claimants who treat mandatory reconsideration as the end of the road, and only begin researching the tribunal process after an unfavourable outcome arrives, frequently find themselves rushing to meet the one-month SSCS5 deadline. Reading the relevant guidance and gathering the evidence you might need for a tribunal appeal at the same time as preparing your mandatory reconsideration request is a more efficient use of time and significantly reduces the risk of missing the second deadline.

Step 1: Mandatory Reconsideration — Form CH24A

To request a mandatory reconsideration of a child benefit decision, you use form CH24A, or you can request one by telephone. You can request a mandatory reconsideration by telephone or in writing using form CH24A, but it is generally advisable to make the request in writing, with proof of postage, and to keep a copy.

Who Can Request It

Usually the person who made the claim or who was paid the benefit submits the request, but they can ask an independent adviser to help them. An appointee claiming on behalf of someone else — for example, a parent acting for a child, or someone formally appointed by HMRC or a court to manage another adult’s affairs — can also request a mandatory reconsideration on that person’s behalf.

The Appointee Role in More Detail

The appointee provisions exist to cover situations where the person entitled to child benefit is unable to manage their own affairs — most commonly where the “person” in question is technically a young person who, in certain limited circumstances, may have a benefit decision made in connection with their own affairs, or an adult who lacks capacity due to illness or disability and has been formally appointed for by HMRC or through a court process such as a Deputyship or Power of Attorney arrangement. It is important to distinguish a formal appointee — someone with documented legal authority recognised by HMRC for this purpose — from simply being a family member or friend who is informally helping someone with their paperwork. The latter does not require any special status to fill in forms or write letters on someone’s behalf with their consent, but they cannot sign as an “appointee” unless HMRC or a court has actually conferred that formal status on them, since the appointee role carries legal authority to make decisions in the other person’s name.

What to Include in Your Request

• The date of the decision you are disputing
• Your child benefit reference number
• A clear statement of what you disagree with and why
• Any new evidence supporting your position (you are not required to have evidence, but it materially improves your chances)
• Your contact details and signature

Mandatory Reconsideration Deadlines

Getting the timing right is critical, because missing deadlines can permanently close off your right to challenge a decision.

You must ask for the reconsideration within 1 month of the date of the child benefit decision notice. Late requests for mandatory reconsideration are possible, as long as they are made within 13 months from the date on the award notice or letter — but HMRC will only accept a late request if you give a valid reason for the delay.

No Right of Appeal Against a Refused Late Request

A critical point that catches people out: under the rules introduced for decisions made on or after 6 April 2014, there is no right of appeal against HMRC’s refusal to allow a late mandatory reconsideration request. This differs from the older system (for decisions before 6 April 2014), where a Tribunal could decide whether a late appeal should be accepted. Under current rules, if HMRC refuses to accept your late mandatory reconsideration request, that refusal itself cannot be challenged at tribunal. This makes acting within the standard one-month window — or, at minimum, within the 13-month absolute limit with a strong reason for lateness — essential.

What Happens During Mandatory Reconsideration

Once HMRC receives your CH24A request (or telephone request), an HMRC officer who reviews mandatory reconsiderations — not necessarily the original decision-maker, though this varies by case type — looks again at the decision, taking into account the points in your request and any new evidence, and makes a mandatory reconsideration decision.

Three Possible Outcomes

If the decision is overturned or varied in your favour and you are satisfied with the outcome, the process ends there — you do not need to proceed to tribunal. If you are still unhappy with any part of the outcome, you can proceed to stage two.

The Mandatory Reconsideration Notice (MRN)

Whatever the outcome, HMRC issues a Mandatory Reconsideration Notice. This letter is essential — you cannot proceed to a tribunal appeal without it, and you must include a copy with your tribunal appeal form. Keep this document safe and make copies.

Step 2: Appealing to the First-tier Tribunal — Form SSCS5

If mandatory reconsideration does not resolve matters in your favour, the next stage is an appeal to the First-tier Tribunal (Social Entitlement Chamber), run by HM Courts and Tribunals Service (HMCTS) — a body entirely independent of HMRC.

Form SSCS5 is used to appeal a decision made by HMRC regarding various benefits, including tax credits, child benefit, guardian’s allowance, tax-free childcare, 30 hours’ free childcare, guaranteed minimum pension, home responsibilities protection, and national insurance credits. This is a different form from SSCS1, which is used for DWP decisions (Universal Credit, PIP, ESA, and similar) — using the wrong form will delay your appeal.

Critical: HMRC Does Not Forward Your Appeal Automatically

You must make your appeal in writing to the tribunal service directly. HMRC will not automatically send the appeal to the Tribunal Service. This is a common and costly misunderstanding — writing back to HMRC to say you disagree with the mandatory reconsideration outcome does not constitute a tribunal appeal. You must separately submit form SSCS5 (or a letter, if you cannot complete the form) to HMCTS.

Tribunal Appeal Deadline

You have one calendar month from the date on the mandatory reconsideration notice to lodge your appeal with HMCTS — and you should allow a few days for postage, since HMCTS must actually receive your appeal within that month, not simply have it postmarked within that period.

Regional Variation

How to Complete Form SSCS5

The form requires specific sections to be completed depending on your circumstances. To fill out this form effectively, applicants must use black ink and block capitals unless otherwise instructed.

Mandatory Sections for Everyone

Conditional Sections

Section 5 — The Most Important Part

Section 5, “About your appeal,” is where you set out why you disagree with the decision. Write what you disagree with and why you disagree with it. You can write as much as you want, but you must provide at least one specific reason. You do not have to send in evidence at this stage — evidence can follow — but a clear, specific, well-reasoned account of your grounds for disagreement gives the tribunal the clearest basis to consider your case favourably.

What You Must Attach

You must include a copy of the mandatory reconsideration notice with your appeal — the form’s guidance is explicit that this is required, and in most cases, if you send your appeal by post, you must include a copy of the mandatory reconsideration notice with the appeal, or explain clearly why you do not have one if that applies to you.

The Appeal Bundle: What HMCTS Sends You

Once HMCTS receives your SSCS5, the process unfolds as follows:

1. HMCTS acknowledges your appeal — you receive a confirmation letter or email
2. HMRC has a set period to respond with their reasons for the decision and all relevant case papers — this is sometimes called the response bundle or appeal bundle, and is governed by the Tribunal Procedure (First-tier Tribunal) (Social Entitlement Chamber) Rules 2008
3. You receive a copy of all the evidence HMRC has submitted — known as the appeal bundle. You should check it carefully against what you originally submitted to HMRC during mandatory reconsideration.

You don’t need to send your evidence again with your appeal form — HMRC should pass on your mandatory reconsideration evidence to HMCTS for the appeal automatically. If any evidence is missing from the bundle you receive, send it to HMCTS directly and explain that HMRC did not include it.

Submitting Further Evidence

You can send additional evidence to HMCTS up to one month after you receive the appeal bundle. If you miss this deadline, you can still send evidence later and explain why it is late — HMCTS might extend the deadline — but it is best practice to send any evidence well before the day of your hearing rather than relying on a late extension being granted.

Reviewing the Bundle Critically

When the appeal bundle arrives, take the time to read it in full rather than skimming for the conclusion. HMRC’s bundle will typically include their statement of reasons for the original decision, copies of the claim form and any subsequent correspondence, and a summary of the relevant law they consider applicable. Checking this against your own records serves two purposes: first, identifying anything genuinely missing (as noted above, this should be flagged to HMCTS promptly); and second, understanding precisely what HMRC’s case against you actually is, so that your own evidence and submissions can respond to it directly rather than simply repeating your original position. Tribunals generally respond well to submissions that engage specifically with the points raised in the opposing bundle, rather than submissions that read as a standalone narrative disconnected from what is actually in dispute.

Disputed Claims: When Another Person Is Involved

Child benefit appeals have a distinctive feature not present in most other benefit appeals: in some cases, the dispute directly involves a second person, not just you and HMRC.

Normally there are only two parties to the appeal — you and HMRC. However, sometimes the dispute may involve another person. For example, both parents (or another adult) may be claiming child benefit for the same child, and the appeal concerns who should receive the payment. In such cases that other person becomes a party to the appeal proceedings, with rights of their own.

What This Means in Practice

This is an important factor to weigh before submitting evidence: as that other party has a right to see all the evidence submitted as part of the appeal, there will be occasions when certain types of evidence — such as bills or bank statements — will include your home address, which the other party will then have the right to see. If safety or confidentiality concerns exist (for example, in cases involving domestic abuse), raise this with HMCTS at the earliest opportunity, as special arrangements can sometimes be made to protect sensitive information while still allowing the appeal to proceed fairly.

What Happens If HMRC Revises the Decision Before the Hearing

After receiving your tribunal appeal, HMRC reviews the case again before it reaches a hearing. If they revise the decision in your favour at this stage, the appeal is said to “lapse” — meaning it ends without going to a hearing, because you have effectively won.

This is common: across the social security tribunal system generally, a significant proportion of appeals are resolved by a revised decision before they ever reach a hearing — DWP data on related benefit types shows that around 20% of initial decision appeals and a much higher proportion of review decision appeals are revised before reaching a hearing, illustrating how often a fresh look at the case by someone preparing for tribunal litigation produces a different outcome than the original decision-maker reached.

What to Do If You Receive a Lapsed/Revised Decision

If you are offered a revised decision, check carefully whether it gives you everything you believe you are entitled to. A partial revision that still falls short of full relief can itself be appealed — receiving some improvement does not require you to accept it as final if you believe further correction is warranted.

Preparing for Your Tribunal Hearing

Documents to Bring

Take your mandatory reconsideration notice and original decision letter to your first appointment if you can, along with any further evidence you have gathered since your initial submission, and a clear written summary of your key arguments.

Building Strong Evidence for Common Issues

Oral Hearing vs Paper Hearing

When completing Section 7 of the SSCS5, you choose whether you want to take part in an oral hearing or have the appeal decided on the papers alone.

The type of oral hearing available — in person, telephone, or video — is at the discretion of the tribunal, and the form asks you to select all options suitable for you to take part in.

Why Requesting an Oral Hearing Generally Improves Your Chances

Across the social security tribunal system, success rates at oral hearings are consistently and significantly higher than paper-only determinations. This is because an oral hearing allows you to clarify points the panel may have questions about, respond to anything HMRC raises in their bundle that you have not had a chance to address in writing, and present the human context behind your case in a way written submissions alone often cannot capture as effectively.

Practical Considerations When Choosing

Even where you feel nervous about an oral hearing, it is worth remembering that the tribunal panel’s role is to establish the facts fairly, not to catch you out — judges and panel members in this jurisdiction are accustomed to dealing with unrepresented claimants and generally adopt an inquisitorial, supportive approach to drawing out the relevant facts rather than a hostile, adversarial one.

What Happens at the Hearing

The First-tier Tribunal (Social Entitlement Chamber) is designed to be accessible to people without legal representation, and the format is generally less formal than a court hearing. A typical structure:

1. The tribunal panel (often a single judge, sometimes with additional members depending on the case type) introduces themselves and explains the process
2. HMRC’s representative (if attending) sets out their position
3. You present your case, answer questions from the panel, and can respond to anything HMRC has raised
4. Both parties may make closing points
5. The panel either gives a decision on the day or reserves its decision to be sent in writing afterwards

If a disputed claim involves another party, that person (or their representative) will also have the opportunity to present their position and respond to questions during the hearing.

After the Tribunal Decision

If you disagree with the tribunal’s decision, there are two distinct further options depending on the nature of your disagreement.

Setting Aside the Decision

If you believe there was a procedural error — for example, you did not receive notice of the hearing, or significant evidence was not considered — you can ask for the decision to be set aside (cancelled), allowing the case to be reheard. The decision letter from the tribunal will explain how to request this and the relevant time limit.

Appealing to the Upper Tribunal

If you believe the tribunal made a legal error — not simply that you disagree with their assessment of the facts — you can appeal to the Upper Tribunal (Administrative Appeals Chamber). This is a higher bar than the First-tier Tribunal appeal: you must identify a specific error of law, not just an unfavourable outcome. Permission to appeal is required and is not automatically granted. Legal aid may be available for Upper Tribunal appeals in some circumstances, reflecting the increased complexity of this stage.

Appealing Further: The Upper Tribunal

The Upper Tribunal does not re-examine the facts of your case from scratch. Its role is narrowly focused on whether the First-tier Tribunal applied the law correctly, followed proper procedure, and reached a decision that was legally open to it on the evidence. Common grounds for an Upper Tribunal appeal include the First-tier Tribunal misapplying the relevant legislation, failing to give adequate reasons for its decision, or reaching a conclusion that no reasonable tribunal could have reached on the evidence presented.

Given the technical nature of this stage, specialist welfare rights or legal advice is strongly recommended before pursuing an Upper Tribunal appeal — the cost and complexity increase substantially compared to the First-tier Tribunal, and success requires identifying a genuine legal flaw rather than simply disagreeing with the outcome.

Common Types of Child Benefit Appeal

Eligibility Refusals

Disputes over whether you meet the basic eligibility criteria — responsibility for the child, residency, or immigration status. These often turn on documentary evidence and the specific facts of your situation.

Stopped Payments at Age 16

A frequent source of appeals: HMRC stops payments at the standard age cut-off because the education extension was not properly recorded, despite the parent having notified HMRC. Evidence of when and how you notified HMRC (call records, online account screenshots, copies of correspondence) is essential here.

Disputed Custody/Residence Claims

Where two people both claim for the same child, the tribunal must determine who the child “normally lives with” based on the evidence from both parties. These cases involve the “other party” rules discussed above and often benefit from an oral hearing where both sides can respond to each other’s evidence directly.

These disputes are frequently the most emotionally difficult category of child benefit appeal, because they arise directly out of separated or breaking-down relationships and require the tribunal to make a finding about a sensitive family circumstance, even though the formal question before it is narrowly about which adult satisfies HMRC’s “responsibility” criteria. Tribunals dealing with these cases generally try to focus tightly on the objective evidence — school records, GP registration, the pattern of overnight stays — rather than on the broader merits of the parents’ relationship breakdown, since the legal question is specifically about which household the child is mainly based in, not about which parent is the better carer in some wider sense.

Where possible, separated parents who can reach an agreement about who will claim — even if one party feels they have a stronger claim — often find this preferable to a contested tribunal process, both because it avoids the delay and stress of the appeal itself, and because the tribunal’s role is in any event limited to applying the existing legal test rather than redesigning the arrangement to suit both parties’ wishes.

Overpayment Recovery Disputes

Where HMRC seeks to recover an overpayment, you can dispute either whether the overpayment is correctly calculated, or in some cases whether you should be liable to repay it at all — particularly if you reported relevant changes promptly and the overpayment arose from HMRC’s own administrative delay rather than your failure to notify.

A useful distinction in these cases is between disputing the existence or amount of the overpayment (a factual and calculation question) and disputing whether you should be required to repay it (sometimes a separate question, depending on the specific overpayment rules that apply). Even where HMRC’s calculation of the overpayment amount is accepted as correct, there can still be grounds to challenge the recovery itself in certain circumstances — for example, where the overpayment arose entirely from an HMRC processing delay after you promptly reported a relevant change, and you had no reasonable way of knowing you were being overpaid in the interim.

Backdating Refusals

Disputes where HMRC has not backdated a claim as far as the claimant believes is warranted. Since the standard backdating limit is three months, these appeals typically focus on whether there were exceptional circumstances justifying treating the claim as having been made earlier than it actually was.

In practice, backdating disputes are amongst the harder categories to win, because the three-month limit is a clear statutory rule rather than a discretionary guideline that a tribunal can simply choose to extend out of sympathy for the claimant’s circumstances. Successful challenges in this category tend to focus on demonstrating that an earlier claim was in fact made — for example, evidence that a claim form was submitted earlier than HMRC’s records show, perhaps lost in the post or not properly logged on receipt — rather than arguing that the three-month rule itself should not apply to the claimant’s situation.

Late Appeals: What Happens If You Miss a Deadline

Late Mandatory Reconsideration Requests

As covered above, late requests are accepted up to 13 months from the original decision, provided you give a valid reason. There is no further right of appeal if HMRC refuses to accept a late request beyond this.

Late Tribunal Appeals

Normally, an appeal has to be made within one month of the date of the mandatory reconsideration notice. In special cases the tribunal will give more time, but you must give a valid reason for the delay — they cannot accept an appeal made 13 months or more after the decision in any case. If you’ve missed the one-month deadline, you should explain why when you submit your appeal, including supporting evidence if you can — for example, evidence you were in hospital at the time of the deadline.

HMRC has the right to object to a late tribunal appeal. If they do object, the tribunal will consider their objection and decide whether to accept the late appeal anyway. The tribunal’s decision on this point is final.

Getting Help and Representation

You can ask someone who knows about the benefits system to help you with your appeal — for example, someone from your local advice centre, law centre, or Citizens Advice. You could also ask a friend or family member to help you complete the forms and gather evidence.

Formal Representatives

If you name a representative on the SSCS5 form and provide your signature authorising this, HMCTS will deal directly with your representative about your appeal, including sending them the appeal bundle. This can be useful where a welfare rights adviser or solicitor is handling your case, as it streamlines communication and ensures nothing is missed.

Where to Get Free Advice

• Citizens Advice — local offices and online guidance specifically covering child benefit appeals
• Welfare rights services — often available through local councils or specialist charities
• Law centres — for more complex legal questions, particularly involving immigration status or residency disputes

What Representation Can and Cannot Do

A representative can help you submit your appeal, prepare your evidence, attend the hearing with you or on your behalf, and communicate with HMCTS and HMRC about procedural matters. What a representative cannot do is guarantee an outcome — the tribunal remains an independent decision-maker assessing the case on its merits regardless of who presents it. That said, evidence consistently suggests that well-prepared cases — whether prepared by the claimant alone or with the help of an adviser — fare better than poorly organised ones, simply because clarity and completeness of evidence is what the tribunal needs to reach a decision in the claimant’s favour.

Understanding Realistic Expectations

Success rates vary considerably by the type of dispute and the strength of the underlying facts, and there is no single reliable published figure specifically for child benefit appeals to the Social Entitlement Chamber comparable to the figures published for some DWP benefit types. What is consistent across the social security tribunal system generally is that cases supported by clear documentary evidence, a coherent chronology, and (where appropriate) an oral hearing tend to perform meaningfully better than cases relying solely on a general assertion that the original decision feels unfair. This is not a reason to be discouraged from appealing a genuinely incorrect decision — it is a reason to invest time in the evidence-gathering and presentation aspects of your case rather than treating the forms as a mere formality.

How This Differs From a HICBC Tax Dispute

It is essential to distinguish the child benefit appeals process covered in this guide from disputing the High Income Child Benefit Charge itself. These are two entirely separate legal systems with different forms, different tribunals (in a formal sense — both ultimately reach the First-tier Tribunal, but different chambers), and different rules.

If you have received a letter about HICBC — the tax charge that claws back child benefit from higher earners — that is a Self Assessment tax matter and follows the tax appeals route, not the process described in this guide. If you are disputing whether you are entitled to child benefit at all, who should receive it, or whether HMRC has correctly calculated an overpayment of the benefit itself, this guide’s process applies.

It is worth noting that the same individual can, in principle, be involved in both processes simultaneously but separately — for example, a higher earner disputing a HICBC penalty under the tax appeal route, while their partner is separately disputing an unrelated decision about the underlying child benefit claim itself under the process in this guide. The two disputes would proceed independently, before different tribunal chambers, governed by different legislation, even though both ultimately concern the same household’s child benefit arrangements. Keeping the two processes clearly separated in your own paperwork — using the correct forms and directing correspondence to the correct HMRC team for each — avoids the confusion and delay that can result from conflating them.

Worked Example: A Complete Appeal From Start to Finish

To make the process concrete, consider a realistic scenario and how it would move through every stage described above.

The Scenario

Sarah’s son turns 16 in February 2026. He continues into Year 12 at his sixth form college, studying A-levels. Sarah calls HMRC in January, before his birthday, to confirm he will be continuing in approved full-time education, and is told this has been noted on the system. In September 2026, Sarah notices her child benefit payment has stopped. She checks her HMRC online account and finds a decision notice dated 1 September 2026 stating that child benefit ended on 31 August 2026 because no confirmation of continuing education was received.

Stage One: Mandatory Reconsideration

Sarah has one month from 1 September to request a mandatory reconsideration. She completes form CH24A, explaining that she called HMRC in January 2026 to confirm her son’s continuing education, and includes the approximate date and time of the call as best she can recall it, along with a letter from the sixth form college confirming her son’s enrolment in a full-time A-level programme from September 2025. She posts this with proof of postage on 20 September 2026, well within the one-month window.

HMRC’s mandatory reconsideration team reviews the case. They check call records from January 2026 and find that a call was indeed logged, but the adviser had failed to update the system correctly to record the educational extension. On 10 October 2026, HMRC issues a Mandatory Reconsideration Notice overturning the original decision, confirming the claim should continue, and arranging for the missed payments since September to be paid as arrears.

What Happens If the Outcome Had Gone the Other Way

Had HMRC instead upheld the original decision — for example, if no record of Sarah’s January call could be found — she would then have one month from the date of that Mandatory Reconsideration Notice to submit form SSCS5 to HMCTS. She would attach a copy of the MRN, set out in Section 5 the full chronology (the January phone call, her reasonable belief that the matter had been dealt with, the college enrolment letter as supporting evidence), and request an oral hearing in Section 7 to give herself the opportunity to answer any questions the tribunal panel might have about the timeline.

This worked example illustrates a recurring pattern in real child benefit appeals: many disputes arise not from a fundamental disagreement about entitlement, but from administrative breakdowns — a call not properly logged, a letter sent to an old address, a form processed incorrectly. Building a clear, dated, evidenced chronology of your own actions is often the single most valuable thing you can do when challenging this type of decision, regardless of which stage of the appeals process you ultimately need to use.

Why Documentation Habits Matter Beyond Any Single Appeal

The Sarah scenario above illustrates a broader practical lesson relevant to anyone interacting with HMRC about child benefit, whether or not a dispute is currently active. Telephone calls to HMRC are recorded and logged on their systems, but errors in how those calls are recorded do happen, and from the claimant’s side there is often no equivalent record beyond memory unless you take deliberate steps to create one.

Practical Habits That Strengthen Any Future Appeal

• Note the date, approximate time, and a brief summary immediately after any HMRC phone call — even a one-line note in your phone or a calendar entry can become decisive evidence months or years later
• Follow up significant phone calls in writing where possible — for example, sending a brief confirmatory message via your HMRC online account message function, if available, creates a parallel written record
• Keep all decision letters and notices, even ones that seem favourable at the time, since a later dispute may need to reference the full history of decisions on your claim
• Request and retain confirmation of any change of circumstances you report — whether by phone, app, or post
• Keep supporting documents (school enrolment letters, tenancy agreements showing address history, employer letters) for longer than you might think necessary, given that HMRC’s various time limits for revisiting decisions can run to several years

None of these habits guarantee a successful outcome if a dispute does arise, but they consistently improve the strength of the evidence available when one does — and they cost only a few minutes of effort at the time, compared to the considerably greater effort required to reconstruct a timeline retrospectively once a decision has already gone against you.

Frequently Asked Questions

How do I appeal a child benefit decision?

First, request a mandatory reconsideration using form CH24A within one month of the decision. If you remain unsatisfied with HMRC’s mandatory reconsideration outcome, appeal to the independent First-tier Tribunal using form SSCS5 within one month of the mandatory reconsideration notice.

What is form CH24A used for?

Form CH24A is used to request a mandatory reconsideration of an HMRC child benefit decision — the first compulsory stage before you can appeal to a tribunal. You can also request this by telephone, though a written request with proof of postage is generally recommended.

What is form SSCS5 used for?

Form SSCS5 is used to appeal HMRC decisions about child benefit, tax credits, guardian’s allowance, tax-free childcare, 30 hours’ free childcare, and several related benefits to the independent First-tier Tribunal (Social Entitlement Chamber). It is different from SSCS1, which is used for DWP decisions like Universal Credit and PIP.

How long do I have to appeal a child benefit decision?

One month from the date of the mandatory reconsideration notice to lodge your tribunal appeal. For the mandatory reconsideration stage itself, you have one month from the original decision, extendable to an absolute outer limit of 13 months with a valid reason for the delay.

Does HMRC automatically forward my appeal to the tribunal?

No. This is a critical point many people get wrong. HMRC will not automatically send your appeal to the Tribunal Service even after a mandatory reconsideration. You must submit form SSCS5 (or a letter) directly to HM Courts and Tribunals Service yourself.

What happens if two people are claiming child benefit for the same child and one appeals?

The other claimant becomes a party to the appeal with rights to see the evidence submitted and to submit their own evidence and attend the hearing. The tribunal decides between the two competing claims based on all the evidence presented by both parties.

Can I get a face-to-face hearing for my child benefit appeal?

Yes, if you request one on the SSCS5 form (Section 7). Oral hearings — in person, by phone, or by video at the tribunal’s discretion — generally have higher success rates than paper-only determinations, because they let you respond directly to points raised in HMRC’s evidence.

What if HMRC changes its mind before my hearing?

If HMRC revises the decision in your favour after receiving your tribunal appeal but before the hearing, your appeal “lapses” — it ends because you have effectively won. Check that the revised decision gives you everything you are entitled to; if it falls short, you can pursue a further appeal.

Is the child benefit appeal process the same as appealing the High Income Child Benefit Charge?

No. The High Income Child Benefit Charge is a tax matter disputed through HMRC’s Self Assessment tax appeal process (internal review, then the Tax Chamber of the First-tier Tribunal). Disputing your child benefit claim, eligibility, or an overpayment of the benefit itself follows the process described in this guide (CH24A, then SSCS5, to the Social Entitlement Chamber).

What if I miss the appeal deadline?

You can still submit a late appeal explaining your reasons for the delay, with evidence if possible. HMRC can object to a late appeal, and the tribunal will decide whether to accept it. The tribunal cannot accept appeals made 13 months or more after the original decision under any circumstances.

Quick Reference: Child Benefit Appeals Timeline

Related Reading

• Child Benefit Eligibility Rules 2026: The Complete UK Guide
• HICBC Appeals and Disputes 2026: Discovery Assessments, Penalties, and Tribunal
• Child Benefit Rates 2026: Complete UK Guide
• Child Benefit Payment Dates 2026: Bank Holidays and Schedule
• Child Benefit for Non-UK Citizens 2026

Information correct as of June 2026 based on current HMRC and HMCTS guidance. This article does not constitute legal advice. For help with a specific appeal, contact Citizens Advice, a local welfare rights service, or a regulated adviser. HMRC Child Benefit Office: 0300 200 3100. HMCTS Benefit Appeals helpline details are available at gov.uk/appeal-benefit-decision.