Chartered Accountants

London EC1, Reading & Dublin

Carbon Accountancy Accreditations

– Exceptional client service – see our testimonials and reviews

– Genuine fixed fees – so you can budget effectively

– Wide variety of added value services including Audits, EMI Share Schemes, Corporate Finance and Business Valuations

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Carbon Accountancy Accountant London Long Lane EC1, Reading and Dublin
Carbon Accountancy, Reading Enterprise Centre

Carbon Accountancy

Looking for a trusted London, Reading or Dublin accountancy firm that offers more than just number-crunching?

At Carbon Accountancy we pride ourselves on building lasting, personal relationships with every client — from fast-moving startups and growing SMEs to international corporations. In fact, there isn’t a single client our Founder and CEO John Leyden hasn’t spoken to personally, and many have been with us for years. Based in London, with offices in Reading and Dublin, we serve clients across the UK and internationally, offering a consistent, high-quality service thanks to our exceptional staff retention.

What sets us apart?

  • Exceptional client service – consistently praised in our testimonials and reviews
  • Genuine fixed fees – so you can plan with confidence and avoid surprises
  • Deep sector experience – across industries, business types and sizes
  • Wide-ranging services – including audits, EMI share schemes, business valuations, and corporate finance
  • Strong, long-term client relationships – built on trust and a personal approach
  • UK reach, local feel – offices in London, Reading and Dublin


If you’re looking for an accountancy firm that combines technical excellence with a human touch, we’d love to hear from you.

Key Services

Company accounts

Looking for a reliable accountant in London or Reading for your company accounts? Whether you’re a startup, growing SME, or long-established limited company, we provide expert, hassle-free support tailored to your business, whatever your sector.

Business Audits

If you’re a large, medium-sized or small business that needs an audit – not because you want one, but because statutory limits regulations, your bank, or shareholders require it – we’re here to make it easier, faster, and better value.

Listed Companies, International Groups & UK Subsidiaries

Looking for a trusted UK accountant for your international subsidiary, group company, or UK start-up? We specialise in helping listed companies, overseas groups and UK subsidiaries manage their UK financial obligations smoothly and efficiently.

Business Tax services

Navigating UK tax can be tricky — but it doesn’t have to be. As specialist tax accountants based in London and Reading, we make complex tax issues simple and straightforward for your business or as an individual.

Book Keeping

Looking for a reliable and professional accountant for bookkeeping in London? Whether you’re a growing start-up or a well-established SME, we offer cost-effective bookkeeping and company accounts services that help you stay on top of your finances — without the stress. At Carbon Accountancy, we understand that many small businesses either don’t have the internal resources to manage bookkeeping in-house or would simply prefer to outsource this time-consuming task to professionals. That’s where we come in. We provide efficient, accurate and compliant bookkeeping solutions designed to suit the unique needs of your business.

Self Assessment Tax Returns

Completing a Self Assessment Tax Return can be time-consuming and stressful — but it doesn’t have to be. Our experienced team handles the entire process for you, ensuring your return is accurate, compliant, and submitted to HMRC on time. We’ll help you make the most of available allowances and reliefs, minimise your tax liability where possible, and give you peace of mind knowing everything is handled professionally and efficiently.

Testimonials

We have been using Carbon for years, they always provide a great service when dealing with all aspects of our accountancy and finance. John, Gaurav and the team are fantastic, always helpful, friendly and respond promptly. An excellent accountancy company.
Debbie Whelan
Google
Have worked with Carbon for a number of years now and they are a fantastic accountancy firm. Always able to assist with useful information and have been invaluable in helping our growth. Gaurav has been amazingly patient and kind, John always available with great insights and advice and Ann consistently efficient. As a SME- they have been an excellent firm to work with.
Alex Siegel
Google
Carbon have been my accountants for over 10 years. They always go above and beyond to deliver an excellent service, and are very patient in working through all the intricacies of both our business accounts, and also my personal filings. John, Gaurav, Beata and the team are all excellent to work with. I'm very happy to recommend them.
Ramsay Kerr
Google
Carbon Accountancy have provided both personal and company accounting services for a number of years and they are always really responsive and extremely helpful. They have offered advice on a number of occasions which has been spot-on each time. Highly recommend
Fergus Rugg-Gunn
Google

Latest Resources

2025 ICAEW Diversity Report

Starting and Selling a Business November 2024

Investing Tax-Efficiently November 2024

Taxation of Property November 2024

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About

Carbon Accountancy - Chartered Accountants

London

Carbon Accountancy
80–83 Long Lane
London EC1A 9ET 

Reading

Carbon Accountancy 
Reading Enterprise Centre, University of Reading,
Reading RG6  6BU

Dublin

105 Serpentine Business Centre
48-56 Serpentine Avenue
Dublin 4 D04 X4W6