Taxation – Cas

GET IN TOUCH

Taxation Services

Expert tax advisory and compliance services in Ireland that drives efficiency and savings.

We work closely with business owners, in-house finance teams, and international groups to provide clear, practical tax advice that supports your goals. Or, avail of our fully outsourced tax compliance service, where we complete every aspect of your taxation, including corporation tax, VAT, PAYE, Employer PRSI, RCT, R&D, and more.

Our clients include Directors, SMEs, owner-managed businesses, and Irish subsidiaries of multinational groups. We work across various sectors and have clients in many different industries, including property and construction, eCommerce and retail, pharmaceutical, manufacturing, service-based businesses, and professional service firms.

Led by our experienced tax advisors and senior leadership team, we provide a proactive service focused on responsiveness, laser focus on detail, and accessible support.

Practical tax support, tailored to your business

Corporate Tax Services

Personal Tax Services

VAT & Indirect Taxes

International & Advisory Tax

Smarter tax support for growing businesses

Effective tax management helps you stay compliant while improving financial outcomes. With the right advice, you can plan ahead and ultimately, reduce your overall tax liability.

Key benefits of professional tax services

Accurate and timely tax filings.
Improved tax efficiency and cash flow.
Reduced risk of penalties or Revenue queries.
Clear guidance on complex tax matters.
Support with business growth and structuring decisions.
Confidence that your tax position is fully compliant.
Structured, experienced support available if you do end up in a Revenue Audit.
Experience in Revenue engagement and issue resolution.

Experts in R&D Tax Efficiency

Over the past number of years, we’ve seen a growing demand for R&D tax support and an increasing appetite from Irish government to support firms that are investing in research and development. This is good news on both fronts as R&D (whether that be lab or desk-based) can really advance your offering as a company, as well as enabling you to maximise tax credits.

Underused in many respects, we ensure the companies we work with avail of the maximum credits available under R&D, where applicable.

Who We Work With

Supporting businesses across Ireland and internationally.

Our tax clients include

SMEs and owner-managed businesses.
Growing and scaling companies.
Irish subsidiaries of international groups.
High-net-worth individuals and directors.
Businesses with complex or cross-border tax requirements.

We tailor our tax services to your structure, sector, and growth plans.

What You Can Expect with a CAS-Led Tax Service

We take time to understand your business and tax position. Advice is clear, organised, accessible, and tailored to your needs. You have a defined ‘no surprises’ plan.

Your tax matters are handled by experienced advisors. You have rapid access to senior support when needed.

We keep things simple and easy to understand. You are kept informed of changes and obligations. No technical jargon, just practical guidance.

All filings are completed accurately and on time. Revenue deadlines are managed proactively. You stay on track without pressure.

Staying ahead of regulatory compliance and revenue changes on your behalf. Your tax affairs are aligned with Irish regulations. Documentation and filings are handled correctly.

Why Clients Choose CAS for their Irish Company Tax?

A more proactive approach to tax

A responsive and approachable team.
Strong focus on practical, commercial advice.
Direct access to experienced advisors.
Support across both compliance and planning.
Experience with Irish companies, international groups operating in Ireland, and cross-border taxation.
Efficient delivery with minimal disruption.

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’HareTEP. 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