Creditors’ Proofs of Debt in Liquidation: HMRC Claims, Admission & Challenge

When a company enters liquidation, HMRC is almost invariably one of the creditors in the queue. Understanding how HMRC proves its tax debts, how the liquidator handles admission and rejection and how those decisions can be challenged is essential knowledge for insolvency practitioners, company advisers and creditors alike. The High Court’s decision in Re Alba Insulation [2026] EWHC 832 (Ch) provides a timely reminder that the procedural requirements for challenging a proof of debt are strict and that non-compliance can be fatal to an otherwise meritorious challenge.

Why This Matters

In most corporate insolvencies HMRC is one of the largest creditors. The quantum of the HMRC proof directly affects the dividend available to all other creditors. An incorrectly quantified HMRC proof, whether overstated through estimated assessments or understated through failure to file, can distort the entire distribution. Equally, a creditor or member who suspects that the liquidator has improperly admitted or rejected a proof has a time-limited right to challenge that decision and the procedural requirements for exercising that right are unforgiving.

This guide explains the proof of debt process from HMRC’s perspective as creditor, from the liquidator’s perspective as decision-maker and from the perspective of anyone seeking to challenge the outcome. It is anchored on Re Alba Insulation [2026] EWHC 832 (Ch), a recent High Court (Chancery Division) decision in which ICC Judge Greenwood refused to grant an extension of time to bring a late challenge to the admission of a proof, with significant consequences for the liquidation and the applicant.

What is a Proof of Debt?

A proof of debt (or simply “a proof”) is the formal written claim by which a creditor participates in a dividend distribution in a corporate insolvency. The terminology and process are governed by Part 14 of the Insolvency (England and Wales) Rules 2016 (IR 2016).

Core Definitions

Under rule 1.2 IR 2016, the key concepts are:

• Proving: A creditor who claims for a debt in writing is said to be “proving” that debt.
• Proof: The document by which the creditor submits details of its claim.
• Provable debts: All debts and liabilities to which the company is subject at the relevant date, plus contingent and future liabilities (rule 14.1). Not all debts are provable: certain categories (e.g., penalties for contempt) are excluded by statute.

The Purpose of Proving

Creditors prove in order to participate in dividend distributions declared by the liquidator from the realisation of the company’s assets. A creditor who does not prove will not receive a dividend, even if the liquidator is aware of the debt. Proving also affects the creditor’s ability to vote at meetings of creditors in decision-making procedures, though in most CVLs and compulsory liquidations the primary purpose is the dividend.

Submitting a Proof: The IR 2016 Process

Rule 14.4 IR 2016 sets out the content requirements for a proof of debt. The proof must state:

• The creditor’s name and address;
• The total amount of the claim as at the date of the winding-up order or resolution (with any applicable discount for accelerated payment);
• Whether the debt carries interest and the basis for any interest claim;
• Details of any security held and its estimated value;
• Particulars of the debt, including how it arose and any documents evidencing it;
• A statement of truth.

When and How to Submit

Creditors may submit proofs at any time before the liquidator declares a final dividend. The liquidator will typically write to known creditors inviting them to prove and setting a deadline. For HMRC, proofs are submitted through HMRC’s Debt Management and Banking unit. The liquidator acknowledges receipt and, in due course, notifies the creditor of the decision to admit or reject.

Inspection of Proofs

Under rule 14.6 IR 2016, creditors, members and contributories may inspect the proofs lodged with the liquidator on reasonable notice. This right of inspection is important for any party who wishes to challenge the admission of another creditor’s proof: they must know what has been admitted before they can mount a challenge.

Admission and Rejection by the Liquidator

Rule 14.8(1) IR 2016 requires the liquidator to examine every proof and, in writing, admit or reject it (wholly or in part), or make provision for it. The liquidator’s decision must be accompanied by a written statement of the reasons for rejection under rule 14.8(2).

Standards Applied by the Liquidator

The liquidator is not a court and does not conduct a trial of the underlying debt. However, the liquidator must form a genuine view on whether the claimed debt is, on the face of the evidence presented, a valid and quantified obligation of the company. Where a proof is in respect of a tax liability, the liquidator will typically look to the assessments, determinations or returns filed by the company as the evidential basis.

Where HMRC has issued assessments that have not been appealed, those assessments represent a quantified and final liability. Where the tax position is disputed, for example where an appeal is pending, the liquidator may admit the proof in a reduced or contingent amount pending the outcome.

Estimated and Contingent Debts

Rule 14.8(3) IR 2016 provides that where the amount of a debt cannot be ascertained, the liquidator must make an estimate. Where a proof is submitted in respect of a contingent liability, the liquidator must value it at the date of the winding-up order or resolution for the purposes of calculating the dividend. Estimations of contingent debts are frequently contentious in HMRC cases where the underlying tax liability remains under appeal.

Challenging the Decision: Rule 14.8 IR 2016

Any creditor, member or contributory who is dissatisfied with the liquidator’s decision to admit or reject a proof may apply to court under rule 14.8(4) IR 2016. This is the exclusive procedure for challenging a liquidator’s decision on a proof: it is not appropriate to use the office holder’s general investigatory powers under s236 IA 1986 to obtain information about a creditor’s proof where the correct route is an appeal under rule 14.8 (see Bellmex International v British American Tobacco [2001] BCC 253).

Time Limits

The rule 14.8 application is subject to strict time limits:

• For creditors whose proofs have been rejected: 21 days from receipt of the notice of rejection (rule 14.8(3)).
• For members and contributories challenging the admission of a third party’s proof: 21 days from becoming aware of the office holder’s decision to admit (rule 14.8(3)).

These are limitation-type provisions and the court has a discretion to extend them, but that discretion is not exercised liberally where the delay is substantial or where extension would prejudice the liquidation process.

The Critical Procedural Requirement: Notice to the Creditor

Rule 14.8(5) IR 2016 requires that, once the court has fixed the venue for the hearing of a rule 14.8 application, the applicant must deliver notice of the venue to the creditor whose proof is being challenged (unless the application is in respect of the applicant’s own proof), and to the office holder. This requirement exists to ensure that the creditor whose proof is under challenge has the opportunity to participate and defend its position.

Re Alba Insulation [2026] EWHC 832 (Ch): Procedural Lessons

Alba Insulation Limited was a home insulation company that carried out works under the ECO3 scheme, a government programme administered by Ofgem designed to improve household energy efficiency. The company entered creditors’ voluntary liquidation following difficulties with its principal contract counterparty, Enesco Limited. The liquidators admitted Enesco’s proof of debt.

Two directors and shareholders of Alba (Giorgo Tori and Dashamir Karriqi) applied under rule 14.8 IR 2016 in April 2024 to challenge the admission of Enesco’s proof. The application was stamped with a hearing date of June 2024. However, notice of the venue was not formally given to Enesco until January 2026, nearly 21 months after the application was issued and in clear breach of rule 14.8(5). Enesco applied to join the proceedings on the morning of the scheduled trial, which ICC Judge Greenwood granted.

The Court’s Findings

Judge Greenwood refused to grant an extension of time to allow the late notice to be regularised and the trial to proceed. The key factors in the exercise of discretion were:

• The severity of the breach: Formal notice was not given to Enesco for over 21 months from the date of the application. This was not a minor delay. It was a complete failure to comply with rule 14.8(5) throughout the entire pre-trial period.
• Prejudice to Enesco: Enesco had not been a party to the proceedings and had not had the opportunity to file evidence or prepare for trial. Granting an extension would require a full adjournment and a fresh round of directions, adding an estimated 18 months to the timeline.
• Impact on the liquidation: The ongoing delay had a direct effect on the progress of the liquidation: until the proof question was resolved, distributions could not be finalised. Three days of court time had been wasted.
• No adequate explanation: The applicants offered no sufficient justification for the failure to serve Enesco during the long period between April 2024 and January 2026.

What Alba Teaches Practitioners

The decision in Alba Insulation is a reminder of several principles that practitioners and company advisers must keep in mind when advising clients who wish to challenge a proof of debt:

• Rule 14.8 is a strictly procedural regime. The time limits and notice requirements are not technicalities. They serve substantive purposes and the court will not routinely waive them.
• The 21-day time limit runs from the date the applicant becomes aware of the decision, which may be earlier than the date formal written notice is received. Members and creditors with access to the liquidator’s reports or who attended meetings at which the proof was discussed need to act promptly.
• The creditor whose proof is being challenged is a necessary party from the outset and must be notified under rule 14.8(5) as soon as the court has fixed a hearing date. Compliance with this obligation is not optional and should be a first-step action after the application is issued.
• Late challenges cause real harm to liquidations. Courts are alive to the prejudice that unresolved proof disputes inflict on the administration of the insolvency estate and on other creditors waiting for distributions.

HMRC as a Creditor: Quantifying and Lodging the Tax Proof

HMRC’s approach to proving in a liquidation differs from that of a trade creditor in several important respects. Understanding those differences helps advisers assess the quantum of the HMRC proof, identify grounds for challenging its amount and manage the interaction between the liquidation process and any ongoing tax appeal.

How HMRC Quantifies Its Claim

HMRC’s proof is based on the company’s outstanding tax liabilities as at the date of the winding-up order or resolution to wind up. The relevant liabilities are typically:

• Corporation tax: Based on assessments raised or on returns filed (where a self-assessed liability exists). Where returns have not been filed, HMRC may rely on estimated determinations made under paragraph 36 of Schedule 18 FA 1998.
• PAYE and employer NICs: Based on the RTI (Real Time Information) records and any PAYE compliance review. These liabilities are monthly obligations; any arrears at the date of liquidation will form part of the HMRC proof.
• VAT: Based on submitted returns, VAT assessments under s73 VATA 1994 or estimated assessments where returns are outstanding.
• Penalties and interest: These are separately identifiable in the proof and rank alongside the principal tax debt unless they are preferential (they are not, all penalty and interest amounts rank as ordinary unsecured debts).

Challenging the Quantum

A liquidator who doubts the accuracy of HMRC’s proof, for example because it includes estimated assessments that have been or could be challenged, should ask HMRC to provide the underlying assessments, determinations and returns. Where an appeal against an assessment is pending at the date of liquidation, the liquidator may admit the proof in an estimated amount, reserving the final figure pending the appeal outcome.

Directors and advisers who believe HMRC’s proof is overstated, for example because an assessment was made without adequate basis or because a pending appeal would reduce the liability, should raise this with the liquidator at the earliest opportunity. The liquidator has a duty to adjudicate the proof fairly and cannot simply rubber-stamp HMRC’s claimed figure.

Preferential vs Ordinary Status: The FA 2020 Changes

From 1 December 2020, the Finance Act 2020 restored HMRC to preferential creditor status in respect of certain categories of tax debt. This is a significant change from the position that had prevailed since the Enterprise Act 2002, which had removed Crown preference entirely.

What Is Now Preferential

HMRC’s “secondary preferential” status under FA 2020 covers debts that HMRC collects as agent for third parties, money that belongs economically to employees and customers rather than to the company:

• PAYE income tax and employee National Insurance Contributions deducted from employees’ wages but not paid over to HMRC;
• VAT collected by the company from its customers but not remitted to HMRC;
• Construction Industry Scheme (CIS) deductions from sub-contractor payments.

What Remains Unsecured

The preferential treatment does not extend to:

• Corporation tax;
• Employer’s National Insurance Contributions (as distinct from employee deductions);
• Capital gains tax or income tax assessed on the company in its own right;
• Any interest or penalties on the above.

These amounts rank pari passu with other unsecured creditors and receive the same pro-rata dividend as trade creditors and other ordinary claimants.

Practical Guidance for Advisers

For Liquidators Adjudicating HMRC Proofs

• Request the underlying assessments, returns and determinations for each head of duty before admitting the proof.
• Check whether any assessments are subject to live appeals: if so, admit a contingent amount and reserve the full figure pending resolution.
• Be alert to estimated assessments based on the CIS, RTI or s73 VATA powers: these may not reflect the company’s actual position and could be significantly overstated.
• Identify the split between preferential and ordinary amounts and make provision accordingly in the distribution waterfall.

For Directors and Members Seeking to Challenge

• Act immediately on learning of the liquidator’s decision to admit a proof. The 21-day limitation period under rule 14.8 begins from the date of awareness, not from formal notification.
• Issue the rule 14.8 application promptly and, as soon as the court fixes a hearing date, serve notice of the venue on the challenged creditor under rule 14.8(5). This is not optional, failure to do so was fatal in Re Alba Insulation [2026].
• Consider carefully whether the grounds for challenge are substantive (the underlying debt is disputed), or procedural (the liquidator failed properly to adjudicate the proof). Substantive challenges require evidence about the underlying tax liability; procedural challenges focus on the liquidator’s conduct.

For Creditors Whose Proofs Are Rejected

• A rejected creditor has 21 days from receipt of the written rejection notice to issue a rule 14.8 application.
• Obtain the liquidator’s written reasons for rejection (rule 14.8(2)), and consider whether the rejection is based on a point of law, a factual dispute or insufficient supporting evidence. Each requires a different approach.
• Consider whether the underlying dispute (e.g., the validity of a tax assessment) should be resolved through the appropriate appeals mechanism before or in parallel with the proof challenge.

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