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Welcome to Taxkey

Taxkey is a specialised tax advisory practice providing practical solutions to Irish SMEs and their owners. We work closely with accountants, solicitors and financial advisors to ensure that all clients receive a holistic and seamless solution for the business and personal financial goals.

In addition, Taxkey advises businesses based outside of Ireland on the tax implications of relocating commercial activities to Ireland. We also have significant experience advising individuals living outside of Ireland and who are subject to Irish tax on their income and gains.

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What type of client are you?

Accountancy Firms

Taxkey is dedicated to proving accountants with a practical tax support service.

Legal Firms

We work closely with legal firms who need specialist tax advice.

Financial Advisors

We work closely with Financial Advisers who are engaged in wealth planning for their clients.

Irish SMEs and their owners

We deliver practical and proactive tax planning strategies for Irish businesses and their owners

Companies operating in Ireland and abroad

We provide expert Irish tax advice for businesses with operations in Ireland and abroad.

Individuals taxed in Ireland and abroad

We provide expert Irish tax advice for individuals who are taxed in Ireland and other jurisdictions.


I was introduced to TaxKey by my own accountant when I had a particularly difficult situation that needed immediate attention. Mairead and her team really ‘stepped up to the plate’ and not only concurred with the opinion, but offered a slightly differing view which, when taken into account reduced the final tax due even more. I am more than happy to recommend TaxKey, as I have done in the past. Her exposure and experience and value for money is second to none!

Declan Kennedy Reiken & Associates

We consult with Taxkey when we come across a tax issue that is outside the scope of our in-house expertise, or when we want a second opinion about a technical tax issue. We have always found Mairéad’s advice to be concise, accurate, to the point and provided in a timely and cost-efficient manner. We highly recommend Mairéad

Declan Long Long Accountants Limited

Kane Bergin & Company used the services of Taxkey on a tricky tax assignment in 2019. We found Mairéad to be very professional, courteous and practical in dealing with us and our client. We would have no hesitation in using Taxkey in the future or recommending their services

Austin Bergin Kane Bergin & Company

Mairéad recently completed a body of work for us relating to VAT on the sale of our company’s commercial property. We found Mairéad to be attentive, practical and capable of guiding us smoothly through the various VAT related complexities of the transaction.

Martin O’Donnell Nuhall Retail Services Limited

Mairéad and the team at Taxkey were brilliant to engage with on our R&D Tax credit. Helped us to understand what was valid R&D expenditure and worked with us every step of the way, producing our technical case and financial accounts for our claim. Would wholeheartedly recommend.

Eamonn Costello patientMpower

As a Sole Practitioner the services of Taxkey have given me the exact reassurance I require in relation to any tax issue. Mairead is always quick to respond and her advice is always excellently measured with all Tax-Heads for any issue given thorough consideration.

Ger Kirwan GK Accounts

Mairead Hennessy is a super accountant. Smart, professional and a pleasure to deal with. I would highly recommend Mairead to anyone looking for an accountant.

Luke Hanahoe Hanahoe & Hanahoe Solicitors

Why Choose Taxkey

Why Choose Taxkey

Timely Support

Client service is at the heart of what we do. We respond to all queries within 24 hours and we will work with you to answer all queries as quickly as possible.

Flexible Service

We are happy to meet you in person or by teleconference depending on your preference.

Expert Advice

Tax is constantly changing. At Taxkey, we stay up to date with tax law and practice to ensure you are getting the best advice possible.

Transparent Fee Structure

At Taxkey, we pride ourselves on our communication skills. Our fees structure is transparent and we are always happy to provide a quotation in advance of starting a piece of work.

Knowledge Centre

Read our tax articles and practical case studies

Our Partners

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