Through our work with clients, we have a significant role to play in making tax and legal systems work better. Our stakeholders have an interest in how we play that role and the impact we make. This report informs our stakeholders through sharing the principles of our approach, examples of our work and the details of our tax contribution.
Throughout FY25 our 4,500 UK Tax & Legal colleagues have helped clients navigate complexity, drive growth and supported the effective operation of tax and legal systems.
This report is a source of great pride and includes stories of the impact we’re making in:
We help shape the future of tax and legal systems through our policy contribution and our investment in people and technology.
The year 2024 saw over 60% of the world population called to polling stations with intense election periods, manifestos and then new governments settling in. The UK was no exception and further to the change of government, HMRC is now focusing on three key priorities: closing the tax gap, improving customer services, and modernising and reforming the tax and customs system. Our tax policy contributions this year have extended to highlighting opportunities for efficiency in administration, as well as areas where the tax system could be simplified.
Our clients were faced with geopolitical challenges and uncertainty, impacting both trade and tax policies which required up to the minute insight, and then a degree of agility and resilience. This year’s Attitudes to Trade survey was the third in our series and was well received by both businesses and the government.
Our trade policy team continued to produce regular insights in their trade newsletter, which is circulated to around 5,000 targeted business contacts each fortnight. Additionally, between January and June 2025, the trade policy team delivered briefings and webinars on the impact of US tariff policy to internal and external audiences.
In FY25 the complexity of tracking, interpreting and understanding global and local tax policy changes continued and we helped businesses navigate this via our technical alerts, webcasts and presentations.
As filing requirements for Pillar Two returns (GIR) become established the focus on data, technology and processes for compliance have intensified. We worked closely with our technology and process experts to ensure Deloitte’s Pillar Two Agent (a global Pillar Two compliance and filing solution, keeps pace with technical, governmental and Organisation for Economic Cooperation and Development (‘OECD’) latest developments.
Other international projects include: policy input to help keep the tax framework up to date with modern business practices such as remote/cross-border working, continued improvements to international tax certainty processes, and long term focus areas such as transfer pricing and permanent establishments. We have provided input to the OECD and UK government stakeholders and guidance to our clients in order that these areas are shaped and adopted appropriately for business in the 21st century.
Registrants to our programme of 42 Dbrief webcasts
Internal specialist presenters share news and views relating to current tax topics with a wide audience of tax practitioners and others
Written responses to tax-related consultations
Bodies including HMRC, HM Treasury, the Department for International Trade and the Organisation for Economic Cooperation and Development (OECD) on a wide range of domestic and international tax issues
User sessions on our UK Tax Policy Map
For the second year running since launch, our UK Tax Policy Map continues to be a compelling reference point across a series of policy themes in an evolving tax landscape
Our investment in people is most clearly shown in our promotion of 1,195 colleagues on 1 June 2024; our recruitment of almost 520 new joiners, including 31 school leavers (our Bright Start programme), 236 graduates and 250 experienced hires.
Earning and maintaining trust is at the heart of every client relationship and is an essential aspect of every person's role in Tax and Legal which, in a large part, happens through the knowledge, skills and technical expertise our people acquire and apply.
This year, we've continued to emphasise the vital role learning plays in developing and maintaining trust. Building on last year's successes, in FY25 we delivered a comprehensive range of learning experiences encompassing technical knowledge, professional education and essential skills. We also promoted the importance of continuous learning through on-the-job experiences to reinforce acquired knowledge.
Learning hours delivered across over 4,000 live sessions
Attendees at 32 separate in-person technical training courses
Professionals attended development programmes at Deloitte University, our dedicated learning and development facility in Paris
Tax & Legal professionals trained in Generative AI, equipping them with the skills needed for the future of work
Alongside the launch of the CIOT Diploma in Tax Technology and the Deloitte Diploma in UK and International Taxation to enhance digital skills and tax knowledge respectively, we also facilitated 820 attendees at our flagship development programmes.
A week-long event to welcome new graduate and school-leaver recruits into the business
A 3.5-day residential course for all newly promoted Consultants
A one-day course to equip our people with tools, skills, strategies and the mindset needed to deliver an unmatched client experience
Throughout FY25 a dedicated learning team of 20 professionals, along with a wide network of learning leads and champions, supported the delivery of our comprehensive learning agenda. We continued to have a strong focus on Diversity Equity & Inclusion, as well as sustainability and wellbeing across our courses.
This year we activated on our Tax and Legal People and Purpose strategy which centres around three key pillars. These pillars underpin our key aims from a talent perspective and reflect our ongoing commitment to our people.
"People Leaders are responsible for supporting their team members’ wellbeing, performance and development. This role is crucial to maintaining our high-performance culture in Tax and Legal and ensuring we maximise people potential as career shapers."
- Harvey Smith, UK Tax & Legal People & Purpose Leader
Zainab Najefi and James Panayi give a sense of how our inclusion policies impact the lives of our people.
The exponential progression in the field of Artificial Intelligence remains an essential area of focus and development within Deloitte Tax and Legal. This year we have scaled our transformation initiatives to provide our people with access to the best tools to provide our services. As we scale, risk, governance and control remain central to all development through our Trustworthy AI model.
Listen here to our digital leader, Hayley McKelvey, talk about our progress.
Our society relies on businesses and individuals engaging with the tax and legal systems in a responsible manner. Our clients trust us to provide the tax and legal advice and compliance services they need to meet this obligation.
HMRC data estimates that the cost of taxpayers not taking ‘reasonable care’ and making errors in relation to tax compliance increased to £21.7 billion in the tax year ended April 2024.
Our client base primarily comprises larger businesses where the tax gap is comparatively low and we help keep it low, by applying the highest professional standards and combining expertise with technology and efficient delivery models.
Given the size of our practice this translates to meaningful social contribution on a national and international scale.
During the calendar year 2024, UK teams have overseen the management of over 90,000 global tax obligations via our Intela client collaboration platform.
The types of obligations managed through this platform include corporate income tax, VAT, transfer pricing, withholding tax, financial statements, country-by-country reporting and many more.
We have submitted more than 15,700 UK personal income tax returns of behalf of our clients with internationally mobile employees and over 5,700 personal tax returns for our private clients. Over 90% of these returns were digitally filed meaning less manual burden on teams to file our clients tax returns.
All Deloitte partners and employees who advise on UK tax matters are committed to upholding the reputation of the profession and adhere to the principles set out in the Professional Conduct in Relation to Taxation jointly developed by the UK’s leading tax and accountancy bodies.
Our legal teams have also supported clients to stay ahead of new obligations and regulations, from providing scoping services and implementation support to ongoing compliance management using the latest technology. As the regulatory landscape continues to evolve – with new digital regulations, the Employment Rights Bill and CRD VI to name a few - we have provided business solutions for our clients, built on legal excellence.
“Good tax governance is the essence of responsible tax and our UK team is demonstrating its world class credentials by contributing to the international debate.”
- Tim Hayle, Tax Director, Deloitte UK
Every year we help many of the most influential leaders across the tax and legal professions connect with the cutting edge of technical developments in their field and build their personal capabilities to help their businesses engage with tax and legal developments at an organisational level.
Photo of Ed Balls, former British politician, George Osborne, British politician and Andy Coticelli, Partner & Vice Chair at Deloitte Private, at the Tax Leader’s Conference 2024.
Our commitment to both our work and charitable causes is actively shaping a more effective societal response to crucial issues like inequality and climate change.
Deloitte makes a significant contribution to the UK Exchequer through the taxes paid by the equity partners and the business. In total this is estimated to be £643m in respect of the past year (FY24: £603m). The partnership itself does not pay tax and national insurance on profits as UK tax rules look through a partnership to its equity partners to tax those profits.
The tax and national insurance borne by the equity partners of Deloitte relates to the profits earned by them. Income tax and national insurance payable by equity partners on the current year profits arising in the UK is estimated to be £347m (FY24: £307m). The average effective rate of tax (including NIC) for equity partners on their total profit entitlement is 49.39% (FY24: 49.87%). The average effective tax rate for an equity partner is higher than the comparable effective tax rate of 45.92% an employee would incur on the same level of income, primarily because, as business owners, the equity partners are required to meet the additional tax cost of disallowable expenditure within the business.
In addition, Deloitte has collected business taxes on behalf of the UK Exchequer of £1,139m (FY24: £1,151m) which includes employee tax and national insurance of £588m (FY24: £622m) and VAT of £551m (FY24: £530m).