Founded in November 2006 by Dr. T. A. Williams, a distinguished Senior Tax Expert, Auditor, Finance & Management Consultant, T. A. Williams Firms is a growing professional services group delivering unparalleled expertise in auditing, accounting, tax consultancy, management consulting, and financial services. Our integrated entities —T. A. Williams Professional Services (Certified Accountants & Chartered Tax Practitioners), T. A. Williams & Associates (Finance, Management, and Corporate Consulting), and T. A. Williams Consulting (Chartered Tax Practitioners) — provide comprehensive solutions to small, medium, and large enterprises, as well as Federal and State government agencies across Nigeria.
Under the leadership of Dr. Williams, a Fellow of multiple prestigious institutes, including the Chartered Institute of Taxation of Nigeria (CITN), the Institute of Chartered Accountants of Nigeria (ICAN), and the Association of National Accountants of Nigeria (ANAN), our firm is driven by a legacy of excellence. With a Ph.D. in Accounting, an MSc in Economics, and extensive experience as a consultant to the Joint Tax Board, Federal Inland Revenue Service, and the Economic and Financial Crimes Commission, Dr. Williams brings unmatched expertise to our practice alongside other key personnel. Their academic and vast professional experience underscore our firm’s leadership and commitment to innovation.
At T.A Williams Firms, our core values of integrity, professionalism, confidentiality, due diligence, and care guide every engagement. Our dynamic team of Ph.D. and Master’s degree holders, also certified by Nigeria’s leading professional accountancy bodies, combines deep financial acumen with advanced analytical and investigative skills to deliver tailored solutions from tax optimization and audit precision to strategic financial planning, we empower our clients to achieve sustainable growth and compliance with confidence.
Duly registered with the Corporate Affairs Commission (CAC) and fully licensed by Nigeria’s foremost accountancy bodies and in compliance with other relevant regulatory bodies, we are pursuing international affiliations to expand our global reach.
T. A. Williams Firms upholds the highest standards of professionalism and integrity. At T.A Williams Firms, we don’t just provide services—we deliver peace of mind, enabling our clients to focus on what matters most: their success.

What We Do

T.A WILLIAMS FIRMS is a composite of T.A WILLIAMS PROFESSIONAL SERVICES (Certified Accountants & Chartered Tax Practitioners), T.A WILLIAMS & ASSOCIATES (Finance, Management and Corporate Consulting) and T.A WILLIAMS CONSULTING (Chartered Tax Practitioners). We are a group of firms which provide efficient and reliable Auditing, Accounting, Tax Consultancy, Management Consultancy and Financial Services to small, medium, and large companies including Federal and State Governments as well as Government Agencies and Institutions. We are duly registered with the Corporate Affairs Commission (CAC), Chartered Institute of Taxation of Nigeria (CITN), Association of National Accountants of Nigeria (ANAN), Financial Reporting Council of Nigeria (FRCN) and Office of Auditor General of the Federation (OAuGF), and Institute of Chartered Accountants of Nigeria, (ICAN).

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Core Values

*Integrity

We act with honesty and ethical principles in every decision and interaction.

*Professionalism

We maintain the highest standards of conduct, expertise, and service excellence.

*Confidentiality

 We protect and respect the privacy of all information entrusted to us.

*Care

 We approach every client relationship with genuine concern and personalized attention.

*Due diligence

We thoroughly research, analyze, and verify to ensure accuracy and completeness.

Why Choose T.A. Williams Firms

At T. A. Williams Firms, we are a dedicated team of highly skilled professionals eager to deliver exceptional Accounting, Taxation, Auditing, Finance, and Management services. Our diverse group of experts brings a wealth of experience, holding prestigious memberships with the Institute of Chartered Accountants of Nigeria (ICAN), Association of National Accountants of Nigeria (ANAN), Chartered Institute of Taxation of Nigeria (CITN), Chartered Institute of Bankers of Nigeria (CIBN), and other esteemed bodies. Backed by advanced academic credentials from leading universities worldwide, we are committed to providing cost-effective, efficient, and transparent solutions that inspire trust.
Our unwavering dedication to integrity ensures that your confidential information is safeguarded in a secure and comfortable environment. We prioritize your satisfaction, delivering top-tier services tailored to meet your unique needs. Partner with us and experience the confidence that comes with working with a team that values excellence and client success above all.

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Our Team

Our firm boasts a team of highly skilled professionals, seamlessly blending expertise in consulting, finance, accounting, auditing, and advanced computing. This group possesses a robust skill set, encompassing financial reporting, investigative prowess, articulate communication, analytical insight, interpersonal skills, exceptional report writing, and sophisticated data analytics.
With remarkable foresight, profound financial acumen, and an enterprising spirit, our dynamic team is poised to deliver exceptional results. We are steadfastly committed to surpassing client expectations, underpinned by an unwavering adherence to the highest professional standards, ensuring integrity, consistency, and a relentless pursuit of continuous improvement.

Dr. TION A. WILLIAMS

Head of the Firm

Dr. HARUNA DZUGWAHI

Quality and Assurance Consultant

Dr. TILE TERHEMBA, FCA

Public Sector Accounting (IPSAS) Consultant of the Firm

HABEEB ADEWALE OJO

Group Manager/Head Audit & Assurance Service Unit

Mrs Olaitan Modupe

Assistant Audit Manager

Aremu Segun Israel

Group Assistant Manager & Head, Taxation Service Unit

Our Clientele

Our clientele includes domestic and international entities of various sizes from different industries. Likewise, for tax purposes, we also serve individuals. To ensure confidentiality and professional ethics, names, and nature of business of clients cannot be disclosed unless where necessary. Our firm has garnered expertise in the fields of audit, taxation, consultancy, training, and business consultancy in its many years of providing professional services.