OA International Holdings is a Singapore-based accounting firm that was founded in 2011. OA provides accounting, audit, tax, accounting advisory, and corporate advisory services.

OA delivers audit services for businesses that include statutory financial audits, special reviews, special purpose audits, and sales audits.

OA company income tax services include tax computation, preparation & filing of income tax returns, and collating with companies to answer IRAS queries. OA will apply and obtain tax or tax incentives, assist in corporate tax planning & management, handle tax objections & disputes, assist with withholding tax compliance, and assist in tax-related matters. OA will help in managing tax for dormant companies or companies liquidizing, advise on corporate income tax-related issues and assist in IRAS corporate tax investigation.

OA offers personal income tax services such as tax reputations, preparation of income tax refunds, preparation of returns of employees’ remuneration, tax clearance, assistance to respond to queries from IRAS, application for voluntary disclosures of past tax errors, tax planning, and tax advisory. Additionally, they provide help with Goods & Services Tax.

OA provides corporate services such as company incorporation, corporate secretarial, and translation.

Valuation services provided by OA include asset valuation, business valuation, purchase price allocation, natural resources valuation, and technical advisory services.

OA delivers accounting services such as compilation of financial statements, XBRL financial report services, payroll services, bookkeeping & accounting, and accounting software setup & training.

OA provides advisory services that include business advisory services, Initial Public Offering consulting, Reverse Takeover consulting, mergers & acquisitions, and grant advisory.



Accounting is the fundamental of all business, but not everyone have the skillset to practice accounting. Furthermore, it can be unpractical for some business to hire an accountant to manage the accounts. We can be the solution to your problems. We provide bookkeeping and accounting services at an affordable rate. We strive to deliver accurate financial information timely so that you can focus on your main business.

Accounting Software

With the recent surge in technology advancement, programmers have designed applications to aid accountants in their daily work. Although the usage of software can enhance the efficiency of accountants, accountants will need to familiarise themselves with the basis of the application. We provide services to setup software in your offices and training to your employees. With our guidance, we believe that our employees will be able to grasp the concept of the application and utilize it in their work. OA International is a Gold partner of Xero Accounting Software. All our team members are Xero Certified Advisors. Xero is a cloud based accounting software that allows you to access your accounts on the go via your laptop or mobile.


OA International can be the solution to your problems. We provide bookkeeping and accounting services at an affordable rate. We strive to deliver accurate financial information timely so that you can focus on your main business. Stop worrying about your accounting or bookkeeping problems and let us take care of them while you focus on your core business functions.


Our advisory services have spanned over the Asian countries in particular of Hong Kong, Guangzhou, Vietnam, Malaysia, Singapore and expanded into Southeast Asia in view of the growth of the business and the cultural cultivation. Our core capabilities are to deliver innovative deal solutions from the initiation stage through to deal completion that lie in our in-depth fundamental knowledge of business and industry and excellent networking with key and strategic players.


The underlying value of an audit is a means of maintaining the credibility of a business. It is more than a formality, it is a necessity to protect your business and encourage it to thrive. Our approach to audit begins with understanding our clients and managing their expectations, followed by our pre-audit planning stage where we access our client’s risk control and plan our timeframe and scope for the audit. Audit work then commences while keeping our clients in the loop with regards to our progress. By the proposed deadline, the audit will be completed.


Setting up a business in Singapore requires you to comply with the various compliance requirements. It can be a turn off for potential start-ups owing to the complex compliance requirements. Incorporating your company can be a challenging matter if you do not have the relevant experience. With OA International company incorporation services, we are able to simplify the process and advise you according to your requirements. By advising you on Singapore’s statutory compliance requirements, we simplify the process of incorporating your company and setting up your business in Singapore. In addition, we can also provide basic advisory service on your business in hope to seeing your business flourish. Speak to OA International to find out more about our company incorporation services today!


Our company secretarial services team members are vigilant and committed and deliver qualified services in a timely manner. Our corporate secretary role includes: Routine secretarial filing Preparation of annual general meeting and submission of annual returns Update of registers and minutes book Other substantial secretarial or administration function


Payroll plays an important role within a company and is easily identified as one of the main portion of the company’s expenditure. , Given the huge variations, changes in labour policies and business regulations, payroll can be a challenging task in fast growing companies. We believe that we can help you manage your payroll functions and provide advice, thus enabling you to better understand the impact of changes in policies and regulations in the business. We are familiar with several HR softwares that is SMP friendly and working with them in order to serve our client better.


Tax is one of the main revenue source for the government. With a wide variety of schemes and processes in place, company without the right expertise will be unfamiliar in this aspect. It is especially so when the tax authorities (IRAS) have been actively monitoring and adjusting the policies.

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JSE Offices
JSE Offices
The Accountancy Partnership
The Accountancy Partnership
onestop professional
Onestop Professional Services


What services does OA International Holdings provide

We provide services in the following areas Accounting, Accounting Software, Bookkeeping, Advisory, Auditing, Incorporation, Secretary, Payroll, Tax

How can I contact OA International Holdings

You can call us +65 6914 1111, come to the office Сингапур 068902, contact us via email at, or via social networks ["Facebook"]

What country is OA International Holdings headquartered in

Our organization is headquartered in Singapore