A Firm with Big Ideas

Atreus Accountants is a firm of chartered accountants and tax advisers providing professional accounting, tax planning, bookkeeping, VAT and payroll services to small businesses, sole traders and limited companies in Wimborne, Dorset and across the UK.

We believe in offering clear, jargon-free advice and practical support that helps you stay compliant, understand your finances and confidently plan for the future.

Experienced, Proactive and Practical

Our approach is centred on helping businesses keep on top of their accounting obligations while reducing uncertainty, stress and last-minute pressure.

We work with clients at every stage of their journey — from new start-ups needing basic compliance support to established businesses looking for guidance on tax planning, cloud accounting and growth strategies.

We combine technical expertise with:

  • Straightforward, plain-English communication

  • A focus on digital solutions and cloud accounting

  • A proactive attitude to deadlines and compliance

Whether you need support with Self Assessment, bookkeeping, VAT & Making Tax Digital (MTD) or payroll, we tailor our advice to suit your needs.

Learn more about our services.

Who We Help

We support a wide range of clients, including:

  • Sole traders and self-employed individuals

  • Limited company directors

  • Small and growing businesses

  • Contractors and consultants

  • Business owners who value clarity and proactive support

No matter your industry — from hospitality to e-commerce and motor trade — we aim to provide relevant, well-structured accounting support that helps you focus on what matters most.

Based in Wimborne, Serving the UK

Located in Wimborne, Dorset, we work with local businesses while also providing remote support to clients throughout the UK. Our use of modern cloud-based accounting software allows us to deliver efficient, up-to-date services without geographical limitations.

We pride ourselves on combining local knowledge with the capability to support businesses nationwide.

William Bailey-O’Neill B.A.

Managing Director

With over 15 years’ experience in accountancy and business management, William leads Atreus with a focus on practical, client-centred advice. He has extensive expertise in Xero, Sage and QuickBooks accounting software and has ensured Atreus is fully prepared for Making Tax Digital (MTD) compliance.

William believes in sharing knowledge clearly and supporting clients to make informed financial decisions — whether that’s completing tax returns or planning ahead for growth.

We aim to be more than just a service provider — we’ll act as a trusted partner in your business accounting and tax management. This includes:

  • Regular review meetings and check-ins

  • Clear explanations of your accounts and tax position

  • Support with technology and reporting

  • Active planning, not passive compliance

👉 Get in touch to see how we can help you stay on top of your accounting and tax needs.

Switching to Atreus Accountants

Changing accountants doesn’t need to be complicated. Atreus offers a smooth, guided transition process so you can move with confidence.

👉 Learn more on our Switch to Us page.

Ready to Talk?

If you’re a sole trader, limited company or small business owner considering professional accounting support, we’d love to hear from you.
Contact Atreus Accountants today and discover how straightforward and helpful professional accounting can be.

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