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Welcome to
Joan O'Sullivan & Co

We have developed a reputation for providing a quality service, which
is evident by the fact that a number of our clients have been with
the firm for a number years and new clients are continuously referred to us.

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Why Choose Us?

Quality Service
and Experience

Experience

Joan O'Sullivan & Co. was established in 2010, before this Joan worked for many years with different accounting firms across the country

Professional Team

Our staff comprise qualified accountants and accounting technicians. We offer a wide range of services for our clients

Expert Advice

We advise a broad range of corporate and private clients. Using our vast skills and knowledge, we will provide you with the best advice.

Friendly Approach

We work with all our clients to find and advise the best solutions. A member of our team will alway be available for your questions.

Annual Returns

An annual return (Form B1) is a document setting out certain prescribed company information which is required to be delivered by an Irish company...

Payroll Services

Your staff must be paid on time, every time; in the Ireland this is typically every weekly. Regular changes to payroll legislation can impose a drain on your resources...

Advisory Services

We all have financial needs, and finding an affordable solution to meeting those needs is an area that many people seek advice upon. our needs today could be...

Tax Planning

We believe in year-round Tax planning to help minimise your current and future Taxation liabilities. Our Taxation Professionals have experience providing...

Audit and Assurance

Companies with a turnover of less than €6.5m do not normally require an audit. There are certain exceptions, for example, when a small company is part of...

Accounting and Bookkeeping

No matter how large or small your business, we understand that your time is precious and, therefore, letting us prepare your accounts will relieve you of what can be...
June 4, 2026

How Weak Accountability Structures Can Quietly Damage Business Performance

As Irish SMEs grow, leadership attention often focuses on sales, recruitment, customer acquisition and operational delivery. These areas are visible and measurable, making them easier ...
Read More →
June 3, 2026

The Financial Impact of Poor Handover Processes Inside Growing Teams

As Irish SMEs grow, team structures naturally become more complex. More staff are hired, responsibilities become specialised and work increasingly moves between departments or individuals. ...
Read More →

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