Chartered Accountants · Lagos & Abuja
Trusted advisers to businesses and institutions in Nigeria since 1983.
For over 40 years, AO&A has been a trusted partner to public and private sector organisations, delivering professional services that strengthen governance, enhance business performance and support informed decision-making. From audit, tax and advisory to forensic investigations, due diligence, business restructuring, feasibility and economic studies, risk management and internal control enhancement, we provide practical, value-driven solutions that help organisations navigate complexity, manage risks and achieve sustainable growth.
Prefer a quick message? Chat with us on WhatsApp or call +234 706 181 5079
Our clients
Trusted by leading organisations
Past and present clients include banks, manufacturers, universities, hospitals, media houses and public bodies.
What we do
Seven service areas, one integrated team
Our specialists work across disciplines, so you get one joined-up service.
Our approach
How we work
Practical, client-focused and built around your objectives.
AO&A Academy
Building capability, strengthening performance
Practical training for finance teams and their colleagues: 47 courses in eight areas, delivered in person, online or hybrid. Our Ikeja training hall and boardroom are also available to hire.
Let’s talk about the challenge you are facing.
Whether you need an audit, tax advice, a fraud review, support with a transaction or training for your team, we will connect you with the right specialists.
About us
More than 40 years of independent professional advice
AO&A is a multidisciplinary firm of chartered accountants and advisers. We practise as AO&A AUDIT and AO&A CONSULT, with offices in Lagos and Abuja.
Our history
- 1983Founded as Aba Ogunsola & Associates, an accounting practice providing assurance and tax services in Lagos.
- 2002Became AO&A Chartered Accountants, operating as AO&A AUDIT and AO&A CONSULT.
- TodayA multidisciplinary professional services firm with offices in Lagos and Abuja. Our head office is at 11 Oba Akinjobi Street, GRA, Ikeja, Lagos.
Who we are
- We choose our clients carefully and put integrity first in every engagement.
- We have long experience serving local and international organisations.
- Our audit, tax, advisory and training teams work together, so each client gets one joined-up solution.
Our mission
Excellence in all we do.
Our people
Skilled professionals working in a structured, supportive environment to deliver high-quality services.
What you can expect from us
Services
Our services
Seven service areas. Each is led by specialists, and our teams work together when your needs cross disciplines.
Clients
Organisations we have worked with
Banks, manufacturers, hospitals, universities, media houses, public bodies and growing businesses have relied on our services. Past and present clients include:
Filter by sector
We also serve trading companies, professional services firms, technology businesses, government-related entities and not-for-profit organisations. References and case studies are available on request.
Ask for a referenceIndustries
Industries we serve
We understand the regulations, risks and reporting demands of the sectors we work in. These are the services organisations in each sector most often need.
AO&A Academy
Training that builds capability
Our training, recruitment and staff development programmes, mostly finance-focused, help organisations keep up with changing business needs.
Course catalogue
Training & meeting facilities
Our head office has a training hall and boardroom. We use them for our own programmes and hire them out for training sessions, board and C-suite meetings, Annual General Meetings (AGMs) and other corporate events.
Location: AO&A Head Office, 11 Oba Akinjobi Street, GRA, Ikeja, Lagos.
Contact
Contact us
Send us a message and the right specialist team will respond.
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Privacy Notice
Last updated: 16 October 2026
AO&A Chartered Accountants (“AO&A”, “we”, “us”) respects your privacy. This notice explains what personal data we collect through this website, why we collect it, how we protect it and what rights you have, in line with the Nigeria Data Protection Act 2023 (NDPA).
1. Who we are
AO&A Chartered Accountants is the data controller for personal data collected through this website. Head Office: 11 Oba Akinjobi Street, GRA, Ikeja, Lagos, with a branch in Abuja. Email: [email protected]. Telephone: +234 706 181 5079.
2. Personal data we collect
- Contact form: inquiry type, first name, last name, email address, country, state, city, phone number, company or organisation, role or job title, and the message you write.
- When you email, call or message us on WhatsApp: the details you choose to share with us.
- Website use: this website does not set advertising or analytics cookies. Fonts are loaded from Google Fonts, so your browser may send technical data such as your IP address to Google when the page loads.
3. How we use your personal data
- To respond to your inquiry and arrange consultations.
- To provide information about our services, training programmes and training and meeting facilities.
- To keep records of our communications with you.
- To meet our legal and regulatory obligations and to protect our rights.
4. Our lawful basis
We process your personal data where you have given consent, where it is needed to respond to your request or take steps before entering into an agreement with you, where we have a legitimate interest in running and improving our services that does not override your rights, or where we are required to by law.
5. Who we share it with
We do not sell your personal data. We share it only with our staff who need it to deal with your inquiry, with service providers that help us operate this website and our email and communication systems (who must keep it confidential and secure), and with authorities where the law requires. If you contact us through WhatsApp, WhatsApp’s own terms and privacy policy also apply.
6. Transfers outside Nigeria
Some of our service providers may process data outside Nigeria. Where this happens, we take steps to make sure your data stays protected as the NDPA requires.
7. How long we keep it
We keep personal data only for as long as we need it for the purposes above or as the law requires. After that we delete it or make it anonymous.
8. Security
We use appropriate technical and organisational measures to protect personal data against loss, misuse and unauthorised access.
9. Your rights
Under the NDPA you have the right to be informed about how your data is used, to access it, to have it corrected, to ask for it to be erased or its use restricted, to object to processing (including direct marketing), to receive your data in a portable format where applicable, to withdraw your consent at any time, and not to be subject to decisions based solely on automated processing. To use any of these rights, email [email protected] and we will respond within the time the law requires. If you are unhappy with how we handle your data, you may complain to the Nigeria Data Protection Commission (NDPC).
10. Children
This website is not meant for children under 18, and we do not knowingly collect their personal data.
11. Changes to this notice
We may update this notice from time to time. The date at the top shows when it was last changed.
12. Contact us
For any question about this notice or your personal data, email [email protected] or call +234 706 181 5079.