Mainpay Ltd v Commissioners for HM Revenue and Customs

Factual and Procedural Background

This is an appeal from a decision of the Upper Tribunal (Tax and Chancery Chamber) ("the UT") which had upheld a decision of the First-tier Tribunal (Tax and Chancery Chamber) ("the F-tT"). The taxpayer on appeal (referred to below as Company A) had its appeal against determinations and notices issued by the revenue authority (referred to below as Company B) dismissed by the F-tT and that dismissal was upheld by the UT.

Company A operates as an umbrella/employment business providing payroll and related services to temporary workers engaged via agencies to perform assignments in sectors such as education, health and social care. Company B issued determinations and notices (including PAYE determinations and a notice under social security legislation) for tax years covering 2010–2014 denying certain subsistence expense deductions which Company A had treated as tax-free reimbursements. Some of the challenged assessments were issued more than four years after the end of the relevant tax year, so Company B relied on statutory extensions of time applicable where a loss of tax was "brought about carelessly" or deliberately.

The F-tT's central factual findings included: the content and practical operation of Company A's 2010 and 2013 contracts with workers; how assignments were sourced and allocated via agencies and Company A's online portal; the operation of a subsistence allowance system (including default automatic claims and limited documentary requirements); and factual conclusions about the adequacy and scope of legal and tax advice obtained by Company A. The F-tT concluded (relevantly for this appeal) that (i) for the 2013 contract there was not an overarching contract of employment covering gaps between assignments (and each assignment gave rise to a separate employment), (ii) Company A could not treat the subsistence payments as automatically tax-free in the absence of an appropriate dispensation and evidence the expenses had been incurred, and (iii) Company A had failed to take reasonable care in respect of earlier tax years such that the extended limitation period applied. The UT considered five grounds of appeal from the F-tT, rejected them, and this appeal to the higher court raises three grounds (summarised in paragraph 92 of the opinion).

Legal Issues Presented

1. Whether the contractual relationship between Company A and its temporary workers amounted to an overarching contract of employment (or, alternatively, whether successive assignments under the same framework constituted a single employment for the purposes of ITEPA), such that each workplace attended on an assignment was a temporary workplace rather than a permanent workplace for tax-deduction purposes.
2. Whether, in principle, an employer may use reasonable estimate/benchmark (round sum) rates to reimburse and deduct subsistence expenditure for tax purposes without a formal dispensation from the revenue authority and without documentary evidence that the expense was actually incurred.
3. Whether the revenue authority discharged the burden required to show that any loss of tax in out-of-time years was "brought about carelessly" by Company A (i.e., the causal question of whether the identified carelessness caused the loss of tax), and whether the pleading of causation by Company B was adequate.

Arguments of the Parties

Appellant's Arguments (Company A / Attorney [Firth])

• Ground 1 (single discontinuous employment): Company A's position was that all services performed by workers were provided under the same contract and that this single contract should be treated as one employment for the purposes of ITEPA, even if there were gaps between assignments. The correct approach is to identify the contractual arrangement and then apply the statute to that contract; where the parties have created one contract it should be treated as one employment.
• Ground 2 (estimates/benchmark rates): Company A argued it was entitled to reimburse subsistence by reference to round sums/benchmark scales without documentary evidence and without a dispensation.
• Ground 3 (causation and time limits): Company A argued that it was not sufficient for Company B to show mere carelessness; Company B had to plead and prove that the carelessness caused the loss of tax (a factual or "but-for" counterfactual). Company A relied on advice it had obtained and argued that any failure to read or follow advice did not necessarily cause the tax loss.

Respondent's Arguments (Company B / Attorney [Choudhury] and Attorney [Magee])

• On the employment question, Company B contended that each assignment constituted a separate employment (a framework agreement produced consecutive contracts of service), so that the workplaces were permanent for each assignment and subsistence was, in principle, non-deductible as ordinary commuting.
• On benchmarking and dispensation, Company B contended that benchmark/round-sum rates could only be used where the employee had actually incurred the cost and where the employer had obtained a dispensation; Company A had not obtained a dispensation and often required no evidence from workers.
• On time limits and causation, Company B argued that the extended limitation applied because Company A had failed to take reasonable care (a statutory concept) and that this failure brought about the loss of tax. Company B relied on the F-tT's pleading and case management discretion; it argued the pleading was adequate and that the F-tT and UT were entitled to find causation on the evidence without requiring a precise counterfactual of what would have happened had different steps been taken.

Table of Precedents Cited

Court's Reasoning and Analysis

The court's reasoning proceeds from statutory provisions through contractual classification to issues of deductible expenditure and time limits for assessments.

Statutory framework and interpretive approach

• The court emphasised the relevant statutory provisions: sections 29, 34, 36 and 118 of the Taxes Management Act 1970 (TMA) and sections 4, 338 and 339 of the Income Tax (Earnings and Pensions) Act 2003 (ITEPA). Key statutory points include (i) section 36(1) extends the assessment period to six years where loss of tax was "brought about carelessly", (ii) section 118(5) defines carelessness as failure to take reasonable care to avoid bringing about the loss or situation, and (iii) ITEPA's definitions of "employment", "workplace" and "permanent workplace" depend on the duties of "the employment".
• On statutory construction the court emphasised that the word "brought about" in section 36(1) is synonymous with "caused" and that section 118(5) explains what "carelessly" means rather than removing any causal requirement.

Contractual classification and the single/discontinuous employment argument (Ground 1)

• The court accepted that the parties' characterisation of their contract is a relevant starting point but does not determine legal classification: the court must analyse the legal effect of contract terms and the surrounding legal tests (substance over labels).
• Applying authorities (including Street v Mountford, Reed and other employment-status authorities), the court concluded that intermittent performance of assignments under a single written framework did not, on the facts found, amount to a continuing or overarching contract of employment covering gaps between assignments. Instead, the correct analysis was intermittent employment: periods when there was a contract of employment (during assignments) and periods when there was no contract of employment (gaps).
• The F-tT's factual findings that agencies generally agreed assignments with workers and that workers had an unfettered right to refuse assignments supported the conclusion there was insufficient mutuality of obligation between assignments to constitute an overarching contract of employment. Given that analysis, each assignment gave rise to a separate contract of service and thus a separate "employment" for the purposes of ITEPA.

Deductibility of subsistence payments and use of benchmark rates (Ground 2 — not reached on appeal)

• The court indicated that if the overarching contract argument failed (as it did), the question whether Company A could deduct subsistence payments using benchmark/round-sum rates without a dispensation was largely academic on this appeal because the primary issue (single employment) was resolved against Company A. The majority declined to express a view on the substantive correctness of ground 2.
• The F-tT had found, on the facts, that the benchmark/round-sum payments were not supported by adequate procedures (no dispensation, no requirement for evidence, automatic default claims) and that there was a serious question whether the arrangements were a genuine attempt to reimburse expenses actually incurred. The F-tT concluded there was no automatic entitlement to deduct the amounts in the absence of dispensation and adequate evidence.

Carelessness, causation and limitation periods (Ground 3)

• The court examined whether sections 36 and 118(5) remove or alter the common-sense causal requirement that the taxpayer's carelessness must have caused the loss of tax. It concluded that they do not: "brought about" is causal language and section 118(5) defines what "carelessly" means (failure to take reasonable care to avoid bringing about the loss) rather than eliminating causation.
• The practical application involved five sub-issues the F-tT had to decide: (i) whether the taxpayer acted carelessly, (ii) what that carelessness was, (iii) whether the carelessness brought about the loss of tax (causation), (iv) burden of proof, and (v) adequacy of Company B's pleading.
• On the facts, the F-tT found Company A had failed to take reasonable care (notably in its reliance on partial/limited advice from its employment lawyers without giving them full background or obtaining specific tax advice on whether the contract would support tax-free reimbursement). The F-tT found the failure to take reasonable care led directly to the loss of tax because Company A treated reimbursements as tax-free when, on the correct legal analysis, they should have been taxable in the absence of an overarching contract and/or a dispensation and evidence of expense.
• The court endorsed the UT's approach on causation: while the burden remains on Company B to show that the careless behaviour brought about the loss of tax, HMRC (Company B) is not necessarily required in every case to prove a precise counterfactual outcome (i.e., to establish with certainty what would have happened had the taxpayer taken different steps). What HMRC must show depends on facts and the nature of the deficiency. If HMRC makes out a prima facie case that carelessness caused the loss, there is an evidential burden on the taxpayer to adduce contrary evidence.
• On the present facts the court concluded the F-tT and the UT were entitled to find causation on the balance of probabilities and that HMRC's pleading (taken as a whole) was adequate to put Company A on notice of the case to meet.

Holding and Implications

Holding: The court would APPEAL DISMISSED and uphold the decisions below.

Implications:

• The F-tT's and the UT's conclusions are affirmed: the 2013 contractual arrangements did not constitute an overarching contract of employment covering gaps between assignments; successive assignments under the framework did not constitute a single employment for the purposes of the relevant ITEPA provisions on the facts found.
• As a result of the contractual classification, Company A could not treat the subsistence reimbursements in the manner it did without appropriate dispensation and evidence; the F-tT's adverse conclusions on the genuineness of the reimbursement procedures and on the inadequacy of documentary safeguards stand.
• The court confirmed that section 118(5) defines "carelessly" but does not eliminate the need for a causal link: HMRC must show that the taxpayer's failure to take reasonable care caused the loss of tax, though HMRC need not always prove the detailed counterfactual consequences of different advice or conduct. On these facts the tribunals were entitled to conclude that Company A's failure to take reasonable care brought about the loss of tax and therefore the extended time limits for assessment applied for the relevant out-of-time years.
• No new general principle was established to alter existing tests for employment status or the causation requirement beyond the confirmed interpretive points; the decision applies the existing statutory language and precedents to the facts of Company A's arrangements and record-keeping and so its precedential effect is fact-specific.

This summary is confined to matters explicitly stated in the provided opinion and does not infer additional facts or legal positions beyond the text of that opinion.