PCAOB vs AICPA Audits: Key Differences and Which One Applies to You
When conducting audits in accordance with United States standards, two main authorities may be involved: the PCAOB and the AICPA. Although both regulate audits, they apply to different types of companies and have distinct objectives.
If you’re a Singapore business operating in the US, preparing for public listing, or reporting to a US parent company, it’s crucial to know which audit standards apply to you.
What Is an AICPA Audit?
The American Institute of Certified Public Accountants (AICPA) provides audit standards primarily used for private companies. These standards are more flexible and allow auditors to exercise greater professional judgment, especially in areas with lower risk exposure.
While PCAOB audits are mandatory for US-listed entities, many private companies in Singapore with US operations or subsidiaries may still be able to use AICPA audit standards, provided they do not fall under SEC regulations.
In Singapore, most private companies follow audit standards aligned with Singapore Financial Reporting Standards (SFRS) and International Standards on Auditing (ISA), which are conceptually closer to AICPA frameworks.
The AICPA (American Institute of Certified Public Accountants) issues audit standards under Generally Accepted Auditing Standards (GAAS), applicable to:
- Private companies
- Non-profits
- Governmental entities not subject to SEC oversight
It is the primary body for CPAs in the US for non-public entity audits.
Overview of AICPA Audits
The AICPA was established in the 1940s, making it the oldest of the two. The more current set of self-regulatory audit standards was first established in the 1970s.
The group’s extensive range of duties includes anything from creating audit criteria for businesses of all sizes, as well as nonprofits and governmental organizations, to preparing for and grading the CPA test and public financial education initiatives.
Keeping all of these extensive audit standards and principles in mind, it is evident that a single business cannot perform all of those different jobs.
A closer look at the AICPA audit also shows it has less strict standards because it started as an auditor-friendly process. The primary purpose of an AICPA audit is to assure the stakeholders that a company’s financial statements are dependable, accurate, and devoid of substantial misstatements.
As a result, although the concurring partner’s assessment is still intended to support the process’s integrity, it is considerably shorter and less evasive. Since the PCAOB has little authority over the process, an AICPA audit has a much longer schedule and lower risk.
What Is the PCAOB Audit?
The Public Company Accounting Oversight Board (PCAOB) regulates the audits of public companies listed in the US. Singapore-incorporated companies that plan to list on a US stock exchange (e.g. NASDAQ or NYSE) or issue American Depository Receipts (ADRs) must engage a PCAOB-registered audit firm to comply with US Securities and Exchange Commission (SEC) regulations.
PCAOB audits are considered more rigorous than AICPA audits. They require:
Detailed testing of high-risk areas, including fraud risks
Formal communication with audit committees
Disclosure of Critical Audit Matters (CAMs)
Strong documentation standards and internal control assessments
Periodic inspections and enforcement actions by the PCAOB itself
This makes PCAOB audits essential for Singapore businesses aiming for cross-border IPOs or acquisitions involving the US capital market.
Overview of PCAOB Audits
A PCAOB audit is more thorough and scrutinizing than an AICPA audit, which is considered to be a softer and easier type of audit. In reality, the Public Corporate Accounting Oversight Board, established in 2002 as a component of Sarbanes-Oxley, speaks volumes just by its name and origin.
PCAOB was established as a direct reaction to the many accounting scandals of the time that together undermined investor confidence and destroyed the public’s faith in several publicly listed corporations.
PCAOB auditors have a forward-looking attitude to keep up with changes in the financial environment, given the industry’s dynamic character, assisting in maintaining investor safety.
As a result, a PCAOB audit has a clear bias in favor of a company’s stakeholders and in favor of delivering transparency, accuracy, and accountability to the investing public.
So, PCAOB auditors will provide two opinions: one analyzing the financial statements and the other, the ICFR, assessing the environment and efficacy of your controls.
Due to the risk involved and the fact that the firm is publicly traded, the auditor often has a lower materiality threshold. This is also consistent with reduced scoping materiality.
Differences
Public corporations that are registered with the Securities and Exchange Commission are the only ones subject to PCAOB audits (SEC). These audits, which are mandated by law, are carried out by independent auditing companies that are PCAOB-registered.
Sarbanes-Oxley Act of 2002 compliance and the absence of substantial misstatements in public corporations’ financial statements are the main objectives of PCAOB audits.
On the other hand, the AICPA conducts audits for a broad spectrum of customers, including for-profit businesses, nonprofits, and governmental bodies. Independent auditors who are also AICPA members do these audits.
The main goals of AICPA audits are to assist customers in streamlining their financial reporting procedures and to guarantee the accuracy of financial statements.
Each sort of audit may have a somewhat different emphasis owing to the unique rules and procedures that apply to it.
In terms of the risk, with a PCAOB audit, the repercussions when things go wrong for PCAOB auditors are far greater.
In addition to the PCAOB itself casting a shadow over the auditor, businesses also have comprehensive review procedures in place, where a committee examines each document before it is released to check for uniformity across the whole company.
Only PCAOB audits are subject to this mandated consultation; AICPA audits are not. A PCAOB audit is unquestionably more thorough and careful and casts a broader net since the materiality is lower, all with a quicker turnaround.
PCAOB vs AICPA Audits: What’s the Difference?
| Feature | PCAOB Audit | AICPA Audit |
|---|---|---|
| Applies to | Public companies (listed) | Private companies & non-profits |
| Overseen by | PCAOB (regulated by SEC) | AICPA (self-regulatory) |
| Legal authority | Enforced under Sarbanes-Oxley Act | Not enforced by SEC |
| Standard used | PCAOB Auditing Standards | AICPA GAAS |
| Documentation & inspection | Strict and reviewed by PCAOB | Less frequent inspections |
| Reporting | Must be filed with SEC | Internal use or private disclosures |
When Do Singapore Companies Need a PCAOB Audit?
You will need a PCAOB audit if:
Your company is incorporated in Singapore but listed on a US stock exchange
You are preparing for a dual listing (e.g. SGX and Nasdaq)
You issue US-traded securities or ADRs
You’re part of a global group headquartered or reporting in the US
For example, a Singapore fintech startup preparing for a Nasdaq IPO would be required to undergo a PCAOB-compliant audit, ensuring that all financial disclosures, testing procedures, and internal controls meet US public company standards.
Why This Matters for Singapore Businesses
As more Singapore companies expand globally or attract foreign investors, understanding audit requirements across jurisdictions becomes essential. PCAOB audits bring credibility when entering US capital markets but require more time, cost, and documentation. AICPA audits, meanwhile, are more appropriate for companies with limited US exposure or those remaining private.
At TY TEOH, we help Singapore businesses navigate international audit standards, whether you’re preparing for a US listing or strengthening your financial transparency for cross-border operations. Our audit teams are equipped to deliver both AICPA-compliant and PCAOB-compliant audits through our global network.
Frequently Asked Questions (FAQ)
Yes. Many audit firms are registered with both, especially those auditing public and private clients.
Generally, yes. PCAOB inspections are more rigorous due to SEC oversight and public filing requirements.
All in all
Overall, there are some key differences between PCAOB and AICPA audits, but they are meant to bring financial fairness, accuracy, and transparency to organizations.
In order to complete these audits in the best way possible, it is recommended that companies rely on professional audit firms in Singapore and let the experts handle them in the best way possible.
