Cas – Ireland's Leading Accountant to SMEs and International Businesses

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Ireland's Leading Accountant to SMEs and International Businesses

Solutions for Growing Businesses

At CAS Advisory, we are a responsive, innovative, and attentive team of accountants, auditors, and tax specialists based in Dublin. You can expect flexible, expert support in outsourced accountancy, tax, audit, payroll, restructuring, strategic advisory, and corporate secretarial services. We help Irish and international businesses stay compliant, make better decisions, and grow sustainably.

In business for over 15 years, with growth primarily driven by referrals, our clients describe us as ‘reliable advisors and the experts you want on your side’.

Trusted auditors and accountants in Ireland delivering consistent, reliable results.

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Accountancy and Advisory Services that Grow with You

From outsourced accountancy to strategic advisory work, we tailor our approach to suit your company’s needs.

We work alongside Irish business owners at every stage, from start-up to growth to successful exit.

Our role is to simplify the financial side, so you can focus on what you do best.

Why Choose Us:

A more responsive, personal approach

Direct access to experienced accountants

Responsive, proactive support

Tailored to your business needs

International network across Ireland, Europe and the US

Trusted by International Brands

We support UK and European companies setting up and expanding in Ireland, providing end-to-end guidance on company formation, tax registration, compliance, and ongoing financial management.

Well-versed in supporting entities to establish a presence in Ireland for the first time, we are regularly referred by both existing clients and professional service firms in our network for this service.

Why? Because we’re experts with a proven track record built over the last 15 years, helping companies establish, scale, and succeed in Ireland.

Looking to establish a presence in Ireland?

Whether you need day-to-day outsourced accountancy support, a local auditor, or an Irish payroll expert, we’re here to help.

What Our Clients Say

“We’ve been with CAS Advisory for over ten years now. Their reliable, hands-on approach is exactly what we need on the ground in Ireland. We know the services they provide to us are in hand, with no surprises. And if we need to seek expert advice, we can get it quickly through their senior management. We’ve grown (and continue to grow) together, and I can’t recommend them enough.”

-Maximilian Harper, COO & CDO,Ceo & CDO | Zeidler Group

“Stephen and the team at CAS Advisory have played a pivotal role in the success of Clarity VP. Their strategic approach and consistently valuable advice have enabled us to sustain continued growth since launching in 2013. The team at CAS is truly outstanding and I look forward to continuing to work with them well into the future!”

Valerie O‘KeefeCeo | Clarity VP

With our previous firm, everything last minute. Since switching to CAS Advisory, we’ve gained a partner — responsive, knowledgeable, and always one step ahead. They understand our sector, offer solid advice, and deliver a hassle-free audit across all our companies. Stephen, Corina, and the who team there are responsive, flexible, and great to deal with- I’d be happy to recommend CAS!”

Michael MurphyFinancial Controller | Bargaintown

“This is my second scale-up with CAS Advisory. CAS are more than accountants – they’re a sounding board and a strategic partner. I value being able to pick up the phone, get practical advice, and know that they understand our long-term vision. I know they are the right partner for us as we enter this exciting next phase of expansion into the UK.”

Chris RooneyHead of Marketing and Communications | Dabbledoo

“The team at CAS are a huge support to O’Hare TEP. We’ve been steadily growing over the past few years and that’s partially down to my ability to focus on business growth, while CAS Advisory looks after all my accounts, tax, payroll, and audit. They’ve been particularly valuable in helping me navigate the purchase of equipment from various locations across Europe - they’re genuine experts. I’d highly recommend CAS.”

Gavin O’HareOwner & MD | O’HareTEP

"Stephen and the team at CAS Advisory are our strategic accountancy partner in Europe, helping us navigate the ever-evolving landscape as we continue to grow. I would not hesitate to recommend CAS Advisory to any company looking to enter Europe—they are a true partner!"

Premier Paint RollerKevin Leichter -CEO