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Where Taxpayers and Advisers Meet
Plucked Out of Thin Air
04/06/2020, by Mark McLaughlin CTA (Fellow) ATT TEP, Tax Articles - HMRC Administration, Practice & Methods
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Mark McLaughlin asks whether some discovery assessments are really made using HMRC’s best judgment.   

Introduction

HMRC’s discovery powers are an important and valuable weapon in its tax compliance armory. There are separate discovery provisions for individuals and companies. This article focuses on the former (TMA 1970 s 29).

The discovery legislation broadly provides for an HMRC officer (or HMRC) to make an assessment of income tax or capital gains tax which, in their opinion, ought to be charged in order to make good a loss of tax brought about due to (for example) a taxpayer’s omission or under-declaration of income or gains.

There are statutory safeguards to protect taxpayers against discovery assessments in certain circumstances, depending on whether the taxpayer has submitted a self-assessment return for the relevant tax year. The extent to which taxpayers are protected by these safeguards has been the subject of many disputes with HMRC, and quite extensive case law over many years.

Don’t Overlook the Obvious!

The natural instinct of taxpayers (and advisers) when discovery assessments are issued is to carefully review the safeguards (in TMA 1970 s 29(3)-(5)) to check whether the assessments have been validly made. However, the basic requirements for a discovery assessment (in s 29(1)) should not be overlooked.

First and foremost, there needs to have been a ‘discovery’ of an omission, under-declaration etc. by HMRC. HMRC may then “make an assessment in the amount, a further amount, which ought in his or their opinion to be charged in order to make good to the crown loss of tax”.

HMRC cannot simply base its discovery on figures plucked out of thin air. In Johnson v Scott [1978] STC 48, Walton J said:

“…what the Crown has to do is…on the known facts, to make reasonable inferences…the Inspector’s figures…ought to be – fair. The fact that the onus is on the taxpayer to displace the assessment is not intended to give the Crown carte blanche to make wild or extravagant claims. Where an inference, of whatever nature, falls to be made, one invariably speaks of a ‘fair’ inference. Where, as is the case in this matter, figures have to be inferred, but has to be made is a ‘fair’ inference as to what such figures may have been. The figures themselves must be fair.”

Onus of Proof

If a discovery assessment is not based on fair and proper inferences from the facts, the assessment is open to possible challenge. On appeal against a discovery assessment, it is generally accepted that the onus is on the taxpayer to prove that the assessment is inaccurate. However, in Cussens v Revenue and Customs [2019] UKFTT 543 (TC), the First-tier Tribunal reminded HMRC that it must bear the onus of establishing that the discovery assessments were made on a reasonable basis.

In Cussens, on 18 January 2018 HMRC issued discovery assessments to the taxpayer for the tax years 2004/05 to 2015/16 inclusive. The basis for the discovery assessments was that HMRC alleged they had made a discovery that the taxpayer had failed to declare trading profits for each tax year. HMRC originally began checking the taxpayer’s tax position for each of the tax years on 5 April 2017 and requested details from him. The taxpayer failed to produce any significant documentation and/or narrative, and subsequently appealed the assessments, asserting that he had no income over the relevant tax years which would result in an income tax liability.

The First-tier Tribunal pointed out that the onus of establishing that the assessments were made upon fair and proper inferences drawn from established facts rested with HMRC. The tribunal also noted that the assessments were subject to a statutory review. The review conclusion letter made it perfectly clear that “best judgment” was the basis for the assessments but failed to consider what (if anything) had been taken into account in arriving at best judgment. There was nothing in the documentary evidence to suggest that any thought, consideration or analysis whatsoever was undertaken by either the HMRC assessing officer and/or the review officer to decide whether the quantum of the assessments was reasonable. The taxpayer’s appeal was allowed.

What is ‘Best Judgment?’

In Cussens, the judge noted that the discovery assessments had been subject to a statutory review, and that the review officer indicated the assessments had been based on ‘best judgment’. There is no explicit reference to best judgment in the discovery legislation, so there is no statutory definition.

However, the tribunal judge pointed out that the following six principles on best judgment had emerged from case law (Van Boeckel v Customs and Excise [1981] STC 150; Rahman (No. 2) v HMRC [2003] STC 150 (albeit VAT decisions):

  1. The respondents must be in possession of some material upon which a best judgement assessment can properly be based;
  2. The respondents are not required to undertake the work which the taxpayer would ordinarily undertake so as to arrive at a conclusion about the exact amount of tax due;
  3. The respondents are entitled to exercise their best judgement power by making a value judgement on the material available;
  4. This tribunal should not treat an assessment as invalid simply because it takes a different view as to how the best judgement could or should have been applied to the material available to the respondents. Before the tribunal interferes, it needs to be satisfied that the purported best judgement assessment was wholly unreasonable;
  5. The tribunal is to start by assuming that the respondents have made an honest and genuine attempt to arrive at a fair assessment.
  6. It is for the tribunal to arrive at the proper sum for the tax payable in the event that it decides that the assessment(s) fail to satisfy the best judgement criteria.

Furthermore, in Homsub Ltd v Revenue and Customs [2019] UKFTT 536 (TC) the tribunal held that in addition to the factors mentioned above, any assessment said to be to best judgment will necessarily have to be methodologically sound or, at least, not methodologically flawed.

Don’t be Bullied!

Cussens is perhaps most notable for the tribunal’s severe criticism of HMRC’s approach to the discovery assessments in that case.

The tribunal was firmly of the view that HMRC’s use of a net profit margin of 50% of supposed turnover had been simply “plucked from the air”. Furthermore, the tribunal concluded that the assessments were “so wild, extravagant and unreasonable” that they were not raised for the purpose of making good to the Crown a loss of tax and so were not authorised by TMA 1970 s 29.

HMRC had decided to issue the assessments “almost in terrorem” with a view to persuading the appellant to engage properly with HMRC in the matters under review. The net profit margin of 50% adopted by HMRC could not properly be described as “best” judgment.

Whilst it would generally be better to comply with HMRC information requests timeously if applicable, taxpayers and advisers should be wary of unrealistic assessments by HMRC to frighten or provoke taxpayers into responding to requests for information where there are delays in providing it for some reason.

The above article was first published in the February/March 2020 issue of ‘HMRC Enquiries, Investigations & Powers’ (https://taxinvestigation.co/new/).

About The Author

Mark McLaughlin is a Fellow of the Chartered Institute of Taxation, a Fellow of the Association of Taxation Technicians, and a member of the Society of Trust and Estate Practitioners. From January 1998 until December 2018, Mark was a consultant in his own tax practice, Mark McLaughlin Associates, which provided tax consultancy and support services to professional firms throughout the UK.

Mark  is a consultant with The TACS Partnership LLP (www.tacs.co.uk). He is also editor and a co-author of HMRC Investigations Handbook (Bloomsbury Professional).

He is a member of the Chartered Institute of Taxation’s Capital Gains Tax & Investment Income and Succession Taxes Sub-Committees.

Mark is Chief Contributor to McLaughlin’s Tax Case Review, a monthly journal published by Tax Insider.

Mark is the Editor of the Core Tax Annuals (Bloomsbury Professional), and is a co-author of the ‘Inheritance Tax’ Annuals (Bloomsbury Professional).

Mark is Editor and a co-author of ‘Tax Planning’ (Bloomsbury Professional).

He is a co-author of ‘Ray & McLaughlin’s Practical IHT Planning’ (Bloomsbury Professional) 

Mark is a Consultant Editor with Bloomsbury Professional, and co-author of ‘Incorporating and Disincorporating a Business’. This content is available as part of a number of Bloomsbury Professional's online modules.

He is Editor and co-author of ‘HMRC Investigations Handbook‘ (Bloomsbury Professional).

Mark has also written numerous articles for professional publications, including ‘Taxation’, ‘Tax Adviser’, ‘Tolley’s Practical Tax Newsletter’ and ‘Tax Journal’, which provides free information and resources on UK taxes to taxpayers and professionals, and TaxationWeb’s sister site TaxBookShop.

Mark is a Director of Tax Insider, and Editor of Tax Insider, Property Tax Insider and Business Tax Insider, which are monthly publications aimed at providing tax tips and tax saving ideas for taxpayers and professional advisers. He is also Editor of Tax Insider Professional, a monthly publication for professional practitioners.

Mark is also a tax lecturer, and has featured in online tax lectures for Tolley Seminars Online.

Mark co-founded TaxationWeb (www.taxationweb.co.uk) in 2002.

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