Personal Service Professional Results We provide accountancy services with our best experts and ensure you the best results from us. LEARN MORE CONTACT US Get Free Consultation From Our Experts We proud ourself to providing great Services and support to Our Clients LEARN MORE CONTACT US

Welcome to Birchtree Sullivan

Birchtree Sullivan has been providing accounting, advisory and tax services to business owners across Greater London. Our London based offices boast one of the region’s growing specialist teams advising business owners in a number of sectors. We work with some of London’s rapidly growing design agencies, property management industries and represent a significant number of businesses and individuals in the engineering, IT and medical services industries.

limited company accounts

Company Accounts

Company Accounts…and so much more Whether you just want help preparing your statutory accounts or you go the whole

accounting business services

Business Services

Birchtree Sullivan can provide you with more than just a set of books at year end. We’ve developed a

tax return services

Tax Returns

Want to pay less tax? Finding the tax allowances and reliefs available isn’t always easy, given the complexity of...

Why People Choose Us

“ Birchtree Sullivan have been working with hundreds of businesses of all shapes and sizes across Greater London. We have gone to great lengths to listen to the needs of businesses, to invest in technology and to train our client accounting team to deliver a high level of service to new and old clients alike.”


Hours in work


Happy clients (%)


Retention (%)


Cups of coffee

  • Eastend printers reviews

    I have worked with a number of accountants over the years and have never found another who offers the same level of care, support and professionalism. Our sound working relationship over the last year has ensured that both our businesses prosper. The Birchtree Sullivan team have looked after us admirably and guided us successfully through pitfalls that any business would expect to encounter. I am delighted with the professional and efficient way in which you do things. In particular, you do what you say you are going to do, do it when you say you will and all the while keeping me fully informed and explaining everything in ‘plain English’. Perhaps those things are not a lot to ask, but these days are quite rare. They have made a big difference to my business.

    Sharik Choudhury

  • Everton Thomas reviews

    Birchtree Sullivan makes my business life so much easier. They’ve helped me with cash flow, forward planning and taxation, reducing my personal tax liability. I would have no hesitation in recommending Russell and his team and would be happy to have a conversation with anybody who would like to know more.

    Everton Thomas

  • Great start nursery reviews

    Birchtree Sullivan has helped us every step of the way in setting up our charity. They had explained in detail but in simple English the best legal form for the charity based on our circumstances. They are great at producing final accounts but what we value most is their proactive approach to our organisation and taking care of all aspects of accounting services.

    Khalil Campbell

  • reviews

    I found Birchtree Sullivan Accountants to be really professional. They always ensure I feel like a valued customer and to me what makes Birchtree Sullivan Accountants unique is their helpful team of dedicated accountants. Their response is always prompt and it makes the daunting task of accounting really easy for me. I would recommend them to everyone.

    Walid Anaan

  • client

    Birchtree Sullivan has transformed our business over the last 12 months, identifying where savings can be made and profits increased. Their approach is friendly, effective and they go beyond just providing accounts, supporting them with understanding and advice to help manage and improve your business. I would recommend them to anyone.

    Talal Mahmud

  • bts online logo

     I get on really well with the partners at Birchtree Sullivan. They were local and had a similar, fresher way of looking at things. We speak on a regular basis. They are still very interested and are an incredibly good sounding board, which I find invaluable. We’ve always had a close relationship; I think that’s why it all works so well.

    Faruk Ahmed


What makes us different?


We believe in translating our technical knowledge in to sound commercial advice, so you understand the information and impact it will have on you and your business.

Minimise Taxation

We love helping our clients to minimise their tax liabilities and ultimately seeing our business owners maximise their wealth aspirations, after all we are in business.


We know businesses require support at every stage of development, as a business owner you can rely on our experience to support your ideas & help you get goals.


Our partners run their own businesses as well, meaning we live in the real world – we’ll give you sensible, professional and practical advice.


You’ll have access to your Birchtree Sullivan partner, whatever your issue, big or small, saving you time and ensuring top quality advice.


We act as a sounding board and challenge your plans. It’s our way of ensuring that you consider all the options and make the best decisions.

chartered accountants London

Request a Free Consultation

Would you like to speak to one of our accountants over the phone? Just submit your details and we’ll be in touch shortly. You can also email us if you would prefer.

    Recent Updates

    IR35 Consultation

    The Big IR35 Consultation

    HMRC has published its keenly awaited consultation on the future of IR35. Radical changes are ahead for some freelancers and those who hire them. How could you be affected? On 18 May 2018 HMRC published its long-awaited consultation on the…

    Read More