Chartered Accountants & Registered Auditors

Intelligent financial solutions that support your goals

O'Brien & Co. is a chartered accountancy practice in Blackrock, Dublin, helping Irish businesses stay compliant, tax-efficient and ready to grow — with a personal, hands-on service.

20+
Years serving Dublin
10
Industries served
CPA
Ireland certified

Welcome to O'Brien & Co.

At O'Brien & Co., we are dedicated to helping your business thrive while meeting all its Revenue and Taxation obligations. No matter how small or big your operation, we are the accountants for you.

We are committed to establishing close working relationships with our clients and delivering a timely and efficient service. Our comprehensive range of services includes bookkeeping, income tax services, company tax returns, auditing, and much more.

We have an interest in you. Our team takes the time to understand your unique circumstances, providing personalised financial solutions that support your goals — both personal and professional.

Our Services

Comprehensive accounting and financial services tailored to your business needs.

Tax Returns

We provide comprehensive tax return preparation and filing services for individuals, sole traders, partnerships, and limited companies. Our team ensures your tax returns are accurate, compliant, and submitted on time to Revenue.

Our tax return services include: - Personal Income Tax Returns (Form 11, Form 12) - Corporation Tax Returns (Form CT1) - Partnership Tax Returns - VAT Returns (Form VAT3) - Capital Gains Tax Returns - Relevant Contracts Tax (RCT) Returns

We stay up to date with the latest Irish tax legislation to ensure you claim all available reliefs and credits, minimising your tax liability while maintaining full compliance.

Auditing

As Registered Auditors, we provide independent statutory audit services for companies of all sizes. Our audit approach is thorough, efficient, and designed to add value beyond compliance.

Our audit services cover: - Statutory Company Audits - Solicitors' Client Account Audits - Charity and Not-for-Profit Audits - Management and Internal Audits - Due Diligence Reviews

We go beyond simply meeting regulatory requirements — our audits provide valuable insights into your financial controls, operational efficiency, and business risks.

Accountancy

We provide a full range of accountancy services designed to give you a clear picture of your business's financial health. From day-to-day bookkeeping to annual financial statements, we've got you covered.

Our accountancy services include: - Preparation of Annual Financial Statements - Management Accounts (monthly/quarterly) - Bookkeeping Services - Credit Control - Cash Flow Management and Forecasting - Budgeting and Financial Planning

We use the latest accounting software to ensure accurate, timely information that helps you make informed business decisions.

Taxation

Our taxation advisory services help you navigate the complex Irish tax system with confidence. We provide proactive tax planning strategies that save you money while keeping you fully compliant.

Our taxation services include: - Tax Planning and Advisory - Revenue Audit Assistance and Representation - Inheritance and Gift Tax Planning (CAT) - Stamp Duty Advice - VAT Planning and Advice - Employment Tax and Benefits-in-Kind - CGT and Exit Planning

We take a proactive approach to tax planning, identifying opportunities and mitigating risks before they become problems.

Law Society Reports

We specialise in preparing Law Society accountants' reports for solicitors' practices in Ireland. Our team has extensive experience with the specific regulatory requirements set by the Law Society of Ireland.

Our Law Society services include: - Annual Solicitors' Accountants Reports (Form SAR) - Solicitors' Client Account Audits - Compliance Reviews and Advisory - Assistance with Law Society Investigations - Practice Management Advice

We understand the importance of meeting Law Society deadlines and requirements, and we work efficiently to deliver reports on time.

Management Reports

Timely and accurate management information is essential for making informed business decisions. We provide customised management reporting solutions that give you the insights you need.

Our management reporting services include: - Monthly and Quarterly Management Accounts - Key Performance Indicator (KPI) Tracking - Budget vs. Actual Analysis - Profitability Analysis by Product, Service, or Division - Cash Flow Reporting and Forecasting - Board and Investor Reporting Packs

We work with you to design reports that are meaningful for your business, presented in a clear and actionable format.

Company Formation & Secretarial

Starting or restructuring a business? We provide complete company formation and secretarial services to help you get set up correctly from day one.

Our company services include: - New Company Formation and Registration with CRO - Company Name Reservation - Registered Office Service - Annual Returns Preparation and Filing - Company Secretarial Services - Changes to Company Structure, Directors, or Shareholders - Company Strike-off and Restoration

We handle all the paperwork and filings so you can focus on running your business.

New Business Start-up

Starting a new business is exciting, but the financial and regulatory landscape can be daunting. We guide you through every step of the start-up journey.

Our start-up services include: - Business Structure Advice (Sole Trader, Partnership, Limited Company) - Business Plan Preparation and Review - Revenue Registration (Income Tax, VAT, PAYE/PRSI) - Financial Projections and Cash Flow Forecasts - Funding and Grant Application Support - Initial Bookkeeping Setup and Software Training

We've helped hundreds of businesses get started on the right foot. Let us help you too.

Payroll and Book-keeping

Efficient payroll and bookkeeping services that save you time and ensure compliance. We handle the numbers so you can focus on growing your business.

Our payroll services include: - Weekly, Fortnightly, and Monthly Payroll Processing - PAYE/PRSI/USC Compliance and Filing - Employee Payslip Generation - P45, P60, and P35 Returns - Revenue Payroll Notifications (RPN) Management - New Employee Registrations and Cessations

Our bookkeeping services include: - Day-to-Day Transaction Recording - Bank Reconciliations - Accounts Payable and Receivable Management - VAT Return Preparation - Cloud Accounting Setup and Support

We use industry-leading payroll and accounting software to deliver accurate, timely results.

Limited Partnership Accounts

We provide specialised accounting and compliance services for Limited Partnerships, a structure commonly used in investment funds, property ventures, and professional services firms.

Our limited partnership services include: - Annual Accounts Preparation for Limited Partnerships - Partner Profit Allocations and Distributions - Capital Account Maintenance - Regulatory Compliance and Filing - Partnership Tax Returns - Partner Exit and Admission Planning

We understand the unique accounting and tax requirements of limited partnerships and provide expert guidance tailored to your structure.

What Our Clients Say

Trusted by businesses across Ireland for over two decades.

We first used the services of O'Brien & Co. when our business had just started in 2002. At that time we were in start-up mode and required services that a small accountancy practice could provide at a reasonable cost. As our business grew, O'Brien & Co. adapted and expanded their service offering to match our new needs.

Tom O'Brien and his team have demonstrated exceptional professionalism combined with a personal touch that larger firms simply cannot match. They have been an integral part of our journey, providing not just accounting services but genuine business advice and support.

We would have no hesitation in recommending O'Brien & Co. to any business looking for a dedicated, knowledgeable, and approachable accountancy partner.

ICD Business School
ICD Business School

Tom O'Brien is the most personable, professional and practical accountant I have ever had. It is a pleasure to do business with this intelligent firm.

What sets O'Brien & Co. apart is their genuine interest in understanding your business and your goals. They don't just process numbers — they provide insights and recommendations that have directly contributed to our growth and profitability.

Their response times are excellent, their fees are fair and transparent, and the quality of their work is consistently outstanding. I have recommended O'Brien & Co. to several colleagues, all of whom have been equally impressed.

Declan O'Rourke
Business Owner

Ready to work with us?

Get in touch today for a confidential discussion about how we can help your business thrive.