To go straight to the articles in the latest edition please scroll down and expand the section/s below that are of interest to you. For a preview of these articles, read the introduction to the latest edition from Sharon Baynham here:
Happy New Year and a big welcome to 2026 and the first edition of Tax Matters Digest - it only feels like a few days ago that we put the final edition for last year to bed! I was hoping we could have a nice slow start to the year so that I could get a few classes in at the gym and allow my New Year’s resolution to peter out naturally before tax policy got busy. But here we are already, with quite a bumper edition for the start of January.
After months of anticipation (and speculation), the OECD has finally released details of the ‘side by side’ arrangement which modifies key aspects of the Pillar Two global minimum tax framework. The documents, issued on 5 January, are the outcome of months of negotiation that followed the G7 statement in June 2025 committing to a collaboration whereby US parented groups would be fully excluded from the Undertaxed Profits Rule (UTPR) and the Income Inclusion Rule (IIR) in respect of both their domestic and foreign profits. Our spotlight article sets out the key highlights of the release and details actions affected multinationals should consider.
Next, we take a look at the draft guidance issued by HMRC to support the Advance Tax Certainty legislation included within Finance Bill 2025-26. The guidance sets out key procedural matters on the process and provides further information on the scope of clearances and the timing and information requirements around applying for clearance. Our article provides more information.
It will not be news that the COVID-19 pandemic fundamentally altered work patterns, with remote and hybrid working arrangements, often across geographic borders, now a permanent fixture in many organisations. This can raise tax issues, from tax and social security complexities to permanent establishment risks and transfer pricing concerns. During 2025, the OECD agreed to explore tax issues presented by the global mobility of individuals, with a view to ensuring that tax rules do not impede the opportunities that global mobility can present to businesses and employees, and to growth and investment more generally. A public consultation was launched on 26 November 2025 and our article sets out KPMG International’s response to the consultation, highlighting the challenges that businesses, individuals and tax professionals face as well as a series of recommendations and simplification requests.
We then move on to two personal tax related articles. The first discusses the Government’s pre-Christmas change to the Inheritance Tax reforms which were to limit relief for agricultural and business property to £1 million (APR and BPR respectively). The Government relaxed the reforms so that now £2.5 million of property can qualify for 100 percent relief. This follows on from the Autumn Budget 2025 announcement that individuals can transfer unused 100 percent relief allowances to a surviving spouse or civil partner, but other core changes to the APR and BPR remain in place. Our article summarises the issues that individuals need to consider before the rules come into force in April 2026.
Our second article addresses tax issues that should be considered when individuals spend more time in the US or are relocating to the US. This article highlights some of the common questions that should be asked and how actions can help manage some of the pitfalls and global tax costs.
We then provide two case updates. The first is the judgment from the Court of Appeal in The Tower One St George Wharf Ltd v HMRC which found that the SDLT general anti-avoidance rule applied to a series of intra-group land transactions. The case is of considerable interest because it sheds light on the meaning of key terms in the general anti-avoidance rule, the extent to which deeming provisions can be applied, using the ’mischief rule’ for interpreting anti-avoidance legislation purposively, and when drafting errors can be corrected by the courts.
The second case involves a First-tier Tribunal decision to reject an appeal by the taxpayer in M&C Educational Training Services Ltd (M&C) v HMRC. Our article provides a summary of the case and highlights the need for an R&D tax relief claimant to seek to advance a recognised field of science or technology.
We have a lot of updates in Other News In Brief in this Edition. We start with the progress of Finance Bill 2025-26 and the date of the ‘Spring Forecast’ (spoiler alert it is 3 March 2026!). Then we move on to HMRC’s International Manual which has been updated for the anticipated Finance Bill changes to the UK transfer pricing, permanent establishment (PE) and Diverted Profits Tax (DPT) rules and new guidance from HMRC in their Guidelines for Compliance (GfC) series which provides help aimed at multinational enterprises assessing the impact of the ‘imported mismatch’ rules. Sticking with HMRC’s GfC series we also flag changes that have been made to GFC7 on ‘common risks in transfer pricing approaches’. We also highlight an HMRC survey on the Business Risk Review Process, HMRC’s annual report on the banking Code of Practice, draft regulations for amendments to be made to the Construction Industry Scheme, and an updated OECD FAQ document in relation to the Crypto-Asset Reporting Framework and the Common Reporting Standard. Finally, we provide a link to KPMG UK’s December 2025 European Economic Outlook.
And just in case all of that doesn’t exhaust you, we also include one Indirect Tax Weekly Talking Points and Week in Tax summaries covering key tax developments from around the world.
With Storm Goretti arriving just as this edition lands in your Inbox, and with much of the UK sitting under blankets of snow, it may be a great opportunity to curl up with a cup of cocoa and catch up on all things tax.
Tax matters for business
Articles of interest to businesses
OECD Administrative Guidance in relation to ‘side-by-side’ package
Administrative Guidance in relation to simplification, safe harbours and introduction of a side-by-side system under the Pillar Two regime
Advance Tax Certainty Service: HMRC release draft guidance
Draft guidance follows publication of draft legislation in Finance Bill 2025-26 and adds key detail on procedural matters
OECD Consultation on the Global Mobility of Individuals: our response
The OECD has recently consulted on the tax issues presented by globally mobile individuals. This article summarises our response
CoA decision on application of SDLT anti-avoidance legislation
The Court of Appeal finds the SDLT distribution ‘exemption’ applies, but then applies general anti-avoidance rules to impose an SDLT charge
R&D tax relief: FTT decision on ‘scientific or technological advance’
R&D tax relief: nuanced FTT decision reiterates requirement for claimant to seek to advance a recognised field of science or technology
Indirect Tax Weekly Talking Points – 17 December 2025
This week’s edition covers two European Court judgments and previews the Supreme Court judgment in Hotel La Tour on professional fees
Tax matters for employers
Articles of interest to employers
OECD Consultation on the Global Mobility of Individuals: our response
The OECD has recently consulted on the tax issues presented by globally mobile individuals. This article summarises our response
Tax matters for Individuals
Articles of interest to individuals
OECD Consultation on the Global Mobility of Individuals: our response
The OECD has recently consulted on the tax issues presented by globally mobile individuals. This article summarises our response
Inheritance tax changes: APR and BPR allowances increased to £2.5m
Relief from IHT is no longer unlimited, highlighting the need to assess IHT exposure, funding strategies, succession plans and review wills
Moving to the United States? Are you prepared?
Individuals spending more time in, or relocating to, the US should think about the tax impact and actions to be taken prior to departure
Other news in brief
- Finance Bill update
- ‘Spring Forecast’ to be published on 3 March 2026
- HMRC International Manual updated for reform of international tax rules
- “Help with imported hybrid mismatches” HMRC guidance published
- HMRC’s Guidelines for Compliance on Transfer Pricing updated
- HMRC survey on Business Risk Review process
- Annual banking Code of Practice report published by HMRC
- OECD FAQs on CARF and CRS updated
- Draft regulations for simplification and administrative amendments to the Construction Industry Scheme (CIS) published for consultation
- European Economic Outlook – December 2025
International round up - Week in Tax
Our tax insights
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