Audit & Assurance
Statutory audits, special-purpose assurance, first-year audits, group reporting support and internal control reviews.
Hong Kong CPA · Cross-border practice
Accounting and compliance,
across four markets.
AONECPA is a Hong Kong CPA practice supporting businesses and families with audit, tax, accounting, company secretarial and immigration matters across Hong Kong, Singapore, Mainland China and the United States. One point of contact, one timeline.
Hong Kong CPA practice · cross-border
Four markets · coordinated
Bilingual · English / Chinese
Clear scope · before engagement
Services
Six services, from incorporation to recurring compliance.
Each service can be engaged on its own or combined into an annual compliance programme. Scope, deliverables and fees are confirmed before work begins.
Tax Services
Profits tax returns, salaries tax, tax planning, source-of-profits analysis and support with IRD enquiries.
Accounting & Bookkeeping
Monthly or quarterly bookkeeping, bank reconciliations, management reporting and cloud accounting setup.
Company Secretarial & Incorporation
Incorporation in four markets, statutory registers, annual returns, director changes and registered address support.
Immigration & Mobility
Eligibility assessment and document coordination for work, investment and dependant visas across the four markets.
Cross-border Advisory
Market entry, holding structures, transaction support, internal controls and outsourced finance leadership.
Markets
Where we work.
Entity choice, tax residence and filing obligations differ in each market. We compare the options first, then coordinate incorporation, accounting, audit and immigration support.
Hong Kong HK
Territorial tax, no VAT, annual statutory audit and a common-law framework long used for regional holding and trading companies.
Singapore SG
A regional headquarters hub with a 17% corporate rate, GST and a resident-director requirement for local companies.
Mainland China CN
WFOE or joint-venture setup, VAT invoicing, annual corporate income tax reconciliation and locally licensed support.
United States US
LLC or corporation setup, federal and state filings, sales-tax nexus and coordination with US licensed advisers.
Tax rates and filing requirements are indicative and subject to change. Local statutory audit, tax representation, legal and immigration work is carried out by locally licensed professionals where required.
Why AONECPA
A single view of a cross-border business.
Where the entity sits, who signs the contract, how funds move and who files the return are connected questions. We keep them on one timeline instead of treating them as four unrelated tasks.
Talk to us01
One point of contact
Hong Kong, Singapore, Mainland China and US matters are coordinated by the same team, with locally licensed professionals brought in where the law requires.
02
Scope and fees first
We confirm the work, assumptions, timetable and fee basis before engagement. Out-of-scope work is agreed before it is performed.
03
Compliance in context
Audit, tax and secretarial filings are not just forms. We flag cash flow, related-party and control issues so compliance informs decisions.
04
Independence and confidentiality
Audit independence, client confidentiality and anti-money-laundering checks are non-negotiable. Work is documented and traceable.
About
A Hong Kong practice built around cross-border work.
Our clients are usually managing more than one set of rules: a Hong Kong audit deadline alongside a Singapore board meeting, Mainland invoicing that affects Hong Kong revenue recognition, or US sales-tax thresholds that depend on where contracts are signed.
We start with the business substance, ownership and money flow, then arrange the filings and documents. Where local audit, tax, legal or immigration input is required, we work with licensed professionals in that jurisdiction and keep one point of accountability.
We do not claim to provide every service in every market. Our role is to decide what needs a local expert, what can be coordinated centrally, and in what order.
Contact
Tell us what you are dealing with.
Include the company location, business activity, year established and the most urgent deadline. We usually reply within one to two business days. Initial discussions are in English or Chinese.