US GAAP Principles Explained: Key Concepts for Financial Reporting
(2026 Update)
Consistency and transparency are the bedrock of trustworthy financial reporting. In the United States, that foundation is built on Generally Accepted Accounting Principles — commonly known as US GAAP. Whether you are a publicly listed company, a multinational with Singapore operations, or a private business seeking investor confidence, understanding US GAAP is essential.
This guide covers the 10 core US GAAP principles as recognised by the Financial Accounting Standards Board (FASB), recent updates to GAAP standards, how US GAAP compares to IFRS and Singapore’s SFRS, and what these principles mean for businesses operating across borders.
What Is US GAAP?
US GAAP is the set of accounting standards, principles, and procedures that govern how companies in the United States prepare and present their financial statements. It is the authoritative framework for financial reporting by US-listed public companies and is widely followed by private businesses, multinational corporations, and subsidiaries of US-headquartered groups worldwide.
The primary body responsible for maintaining and updating US GAAP is the Financial Accounting Standards Board (FASB), an independent, private-sector organisation established in 1973. The FASB issues Accounting Standards Updates (ASUs) when standards need to be clarified, corrected, or updated to reflect changes in business practice. Its work is overseen by the Financial Accounting Foundation (FAF), and the US Securities and Exchange Commission (SEC) formally recognises the FASB’s authority.
US GAAP is governed by the FASB Accounting Standards Codification (ASC), which is the single, authoritative source of non-governmental US GAAP. It organises all accounting standards by topic — from revenue recognition (ASC 606) to leases (ASC 842) — making it easier for accountants and auditors to locate and apply the relevant guidance.
The 10 Key Principles of US GAAP
The FASB has defined 10 foundational principles that underpin all US GAAP standards. These principles do not govern individual transactions — they establish the professional and ethical framework within which all financial reporting must operate.
Principle of Regularity
Accountants must adhere strictly to all established GAAP guidelines. There is no selective compliance — if a standard applies to a transaction, it must be followed in full. This principle ensures that financial statements are prepared within a defined, rules-based framework rather than at the discretion of individual preparers.
Example: A company cannot choose to apply ASC 606 revenue recognition rules to some contracts but not others — the standard applies consistently across all qualifying arrangements.
2. Principle of Consistency
The same accounting methods and policies must be applied consistently from one reporting period to the next. If a company changes its accounting method — for example, switching from one depreciation method to another — the change must be disclosed in the notes to the financial statements, along with the reason and the financial impact of the change.
Consistency allows investors, auditors, and regulators to make meaningful comparisons between periods and across companies.
Example: If a company uses the straight-line method to depreciate fixed assets, it must continue using that method unless a change is justified and properly disclosed.
3. Principle of Sincerity
Accountants are required to represent a company’s financial position accurately and impartially — even when the picture is unflattering. Financial statements must reflect actual performance and condition, not a managed or optimistic version of it.
This principle is especially important in audits: the auditor’s role is to assess whether management has applied sincerity in preparing the accounts.
Example: A company experiencing significant losses must report them honestly. It cannot offset losses against unrelated gains or present results in a way designed to mislead users.
4. Principle of Permanence of Methods
This principle reinforces consistency, but specifically as it applies to long-term reporting practices. Companies should not change their accounting methods frequently, as doing so makes year-on-year comparison difficult and opens the door to earnings manipulation.
Changes should only be made when there is a compelling reason — such as a new FASB standard or a material change in business model — and must be fully disclosed.
Example: If a company changes its inventory costing method from FIFO to weighted average cost, it must disclose the change, restate prior period figures if required, and explain the impact on reported earnings.
5. Principle of Non-Compensation
Companies must present all financial information fully — without netting assets against liabilities, or revenues against expenses — unless a specific GAAP standard permits offsetting. Each item should be shown separately to provide a clear, unmanipulated view of financial performance.
Example: A company cannot offset a lawsuit liability against the proceeds from an insurance policy that covers the same claim. Both must be disclosed separately.
6. Principle of Prudence
Financial statements should be based on verifiable facts, not speculative projections. When uncertainty exists — for example, about the outcome of a legal case or the recoverability of a debt — accountants should err on the side of caution. Potential losses should be recognised as soon as they are probable; potential gains should only be recognised when they are realised.
Example: If a company has a customer with doubtful debt, it must recognise a provision for that expected loss in the current period, even if the debt has not yet been written off.
7. Principle of Continuity (Going Concern)
Financial statements are prepared on the assumption that the business will continue to operate for the foreseeable future. This assumption affects how assets are valued — under going concern, assets are recorded at historical cost or fair value rather than liquidation value.
If there is substantial doubt about a company’s ability to continue as a going concern, this must be disclosed. In such cases, the financial statements may need to be prepared on a different basis.
Example: A startup with limited runway and declining revenues must disclose going concern risk if it cannot demonstrate it has sufficient funding to operate for at least 12 months from the reporting date.
8. Principle of Periodicity
Companies must divide their financial activities into defined time periods — typically quarterly and annually — and report results for those periods consistently. Revenue and expenses must be allocated to the period in which they occur, not shifted between periods.
This principle prevents companies from manipulating results by moving income into future periods or pulling future expenses forward.
Example: A software company that receives annual subscription payments upfront must recognise revenue over the service period — it cannot book 12 months of subscription revenue in month one.
9. Principle of Materiality
All information that could reasonably influence the decisions of financial statement users must be disclosed — whether in the main statements or in the notes. Materiality is a judgement call, but the guiding test is: would a reasonable investor consider this information significant?
Immaterial items can be simplified or combined; material items must be separately disclosed regardless of their nature.
Example: A contingent liability from a major lawsuit must be disclosed even if the outcome is uncertain. A minor parking fine does not need to be separately called out.
10. Principle of Utmost Good Faith
All parties involved in financial reporting — management, accountants, auditors — must act with complete integrity and honesty. This principle goes beyond compliance: it is an ethical commitment to truthful, transparent reporting in the interests of all stakeholders.
Example: Management must not instruct accountants to structure transactions in a way that technically complies with GAAP but is designed to obscure the economic reality of the company’s position.
Recent FASB Updates: What Has Changed in 2025–2026
US GAAP is not static. The FASB regularly issues Accounting Standards Updates to address emerging issues, correct technical errors, and keep standards aligned with evolving business practices. Key updates from 2025–2026 that preparers should be aware of include:
ASU No. 2025-12 – Codification Improvements
Issued in December 2025, this update addresses 33 specific technical issues within the FASB Accounting Standards Codification. The improvements are largely clarifying in nature — correcting errors and removing inconsistencies rather than overhauling fundamental principles. The amendments are effective for annual reporting periods beginning after 15 December 2026.
Diluted EPS Clarification
Also issued in December 2025, this standard clarifies how companies calculate diluted earnings per share (EPS) during loss periods — an area where practice had been inconsistent across preparers.
Government Grants Recognition
In December 2025, the FASB issued guidance establishing how business entities should recognise, measure, and present government grants. Previously, US GAAP lacked specific authoritative guidance on this topic, leading to varied practice across industries.
Expense Disaggregation Requirements
Effective from 2025 onwards, public companies are now required to disaggregate expenses by function and nature in their financial disclosures. This provides investors with greater insight into cost structure — for example, distinguishing how much of cost of goods sold relates to employee costs versus depreciation.
2026 FASB GAAP Taxonomy Update
The 2026 FASB GAAP Financial Reporting Taxonomy adds 120 new structured data elements while deprecating 564 older elements, reflecting the ongoing evolution of reporting requirements.
Companies operating under US GAAP — including Singapore-based subsidiaries of US-listed groups — should work with their auditors to assess whether these updates affect their current accounting policies.
US GAAP vs IFRS: Key Differences
For multinational businesses and Singapore-based companies, the relationship between US GAAP and International Financial Reporting Standards (IFRS) is a practical daily concern. For a deeper comparison specific to Malaysian companies, see our guide on US GAAP vs IFRS: key differences. Singapore companies follow SFRS (Singapore Financial Reporting Standards), which is converged with IFRS. This means there are meaningful differences between SFRS and US GAAP that require careful management.
Area | US GAAP | IFRS / SFRS |
|---|---|---|
Inventory costing | LIFO permitted | LIFO prohibited |
Development costs | Must be expensed as incurred | Can be capitalised if criteria are met |
Revenue recognition | ASC 606 (5-step model) | IFRS 15 (largely aligned, minor differences remain) |
Lease accounting | ASC 842 | IFRS 16 |
Investment property | Measured at cost (generally) | Fair value option available |
Revaluation of PP&E | Not permitted | Permitted under IFRS revaluation model |
These differences matter significantly when a Singapore subsidiary must be consolidated into a US-listed parent’s accounts. The Singapore entity prepares SFRS financial statements locally, but adjustments must be made to align them with US GAAP for group reporting purposes. For a detailed walkthrough of this process, see our guide on IFRS to US GAAP conversion in Singapore.
The Role of Audit Firms in Singapore
For multinational corporations with Singapore operations, US GAAP accounting in Singapore is not simply a matter of following accounting policies — it involves navigating the overlap between Singapore’s regulatory environment and US reporting requirements.
SFRS to US GAAP Reconciliation
Singapore-incorporated subsidiaries of US-listed groups typically prepare their statutory accounts under SFRS (aligned with IFRS). When these results are consolidated into the US parent’s group accounts, the subsidiary’s figures must be reconciled to US GAAP. Key reconciliation items commonly include inventory costing differences, capitalisation of development costs, and treatment of lease modifications.
Experienced audit firms in Singapore understand both frameworks and can assist businesses in identifying and quantifying these reconciliation adjustments efficiently.
MAS Reporting Requirements
Companies listed on the Singapore Exchange (SGX) are subject to disclosure requirements set by the Monetary Authority of Singapore (MAS). Where a Singapore-listed company also has cross-listing obligations in the US, it must maintain parallel compliance with both MAS disclosure rules and SEC reporting requirements — including filing on Form 20-F, which requires IFRS or US GAAP-compliant financial statements.
PCAOB Compliance
Audit firms in Singapore that audit US-listed companies — or Singapore subsidiaries of US-listed groups — must comply with the standards of the Public Company Accounting Oversight Board (PCAOB), in addition to local audit standards. PCAOB-registered firms are subject to inspection by the PCAOB, which oversees audit quality for US-listed entities globally.
Practical Support from Singapore Audit Firms
A Singapore-based audit firm with US GAAP expertise can assist in several ways:
- Reviewing and adjusting SFRS accounts for US GAAP consolidation purposes
- Identifying GAAP accounting policy differences that require adjustments
- Ensuring disclosures meet both SGX Listing Rules and SEC requirements
- Conducting PCAOB-compliant audits for subsidiaries of US-listed parents
- Advising on the impact of new FASB standards on Singapore operations
For businesses at the intersection of Singapore and US reporting requirements, choosing an audit firm with genuine cross-jurisdiction expertise is not optional — it is a compliance necessity. Learn more about our US GAAP audit services for Singapore businesses.
Importance of US GAAP Principles
Transparency and Investor Confidence
US GAAP principles ensure that financial statements present a true and fair view of a company’s financial position. This transparency reduces the risk of fraud, enables more accurate valuation, and builds investor confidence — all of which contribute to lower cost of capital for well-governed companies.
Comparability Across Companies
Because US GAAP requires consistent application of standards, investors and analysts can compare financial results across different companies and industries on a like-for-like basis. This is particularly valuable in capital markets, where relative performance is often the basis for investment decisions.
Regulatory Compliance
For companies listed on US exchanges — including the NYSE and NASDAQ — GAAP compliance is a legal requirement enforced by the SEC. Non-compliance can result in enforcement action, restatement of financial results, or delisting.
Global Recognition
US GAAP is widely recognised by international investors, lenders, and regulators. For Singapore businesses seeking US investment, listing on a US exchange, or entering joint ventures with US partners, GAAP-compliant financial statements provide a foundation of credibility.
US GAAP vs. IFRS: Key Differences
While US GAAP is the official standard in the US, many countries follow International Financial Reporting Standards (IFRS). Here’s how they differ:
| Feature | US GAAP | IFRS |
|---|---|---|
|
Standard Setter |
FASB (US) |
IASB (Global)
|
|
Basis |
Rules-based |
Principles-based
|
|
Inventory Valuation |
Allows LIFO & FIFO |
Only FIFO
|
|
Goodwill Treatment |
Impairment test annually |
Amortized over time
|
|
Revenue Recognition |
Strict, detailed guidelines |
More flexibility
|
Many US companies operating internationally must comply with both US GAAP and IFRS to meet reporting requirements in different jurisdictions.
US GAAP vs. SFRS: Key Differences
While both US GAAP and SFRS are high-quality frameworks, they differ in several important areas. Here’s a side-by-side comparison to help Singapore businesses navigate dual reporting requirements:
| Area | US GAAP (United States) | SFRS (Singapore – based on IFRS) |
|---|---|---|
|
Standard Setter |
Financial Accounting Standards Board (FASB) |
Accounting Standards Council (ASC), aligned with IFRS |
|
Framework Type |
Rules-based: detailed, specific |
Principles-based: broad, flexible
|
|
Revenue Recognition |
ASC 606 – 5-step model
|
SFRS(I) 15 – mirrors IFRS 15
|
|
Inventory Costing
|
LIFO and FIFO allowed
|
LIFO not permitted
|
|
Development Costs
|
Expensed as incurred
|
May be capitalised if certain criteria met |
|
Revaluation of Assets |
Not allowed (Historical cost only) |
Revaluation allowed for PPE and intangibles |
|
Presentation Format |
Specific formats required by SEC |
More flexibility under IFRS-style presentation
|
|
Impairment |
Two-step impairment testing |
One-step recoverable amount test
|
Understanding these differences is crucial, especially when preparing consolidated group accounts, reconciling financials, or preparing investor reports for US-based stakeholders.
Local Audit Considerations
In Singapore, financial statements must comply with SFRS for statutory submission to ACRA and IRAS. However, where US GAAP statements are required for group consolidation or investor reporting, your external auditor may perform additional reconciliations or prepare a US GAAP conversion report.
At TY TEOH, we assist businesses across Southeast Asia with:
US GAAP to SFRS reconciliations
Dual reporting for group structures
Audit preparation for cross-border requirements
Compliance advisory for SGX or US-bound companies
Our experience ensures accurate and compliant reporting across jurisdictions—whether you’re expanding into the US, dealing with investors, or managing multinational operations.
All in All
US GAAP provides the framework that makes financial reporting consistent, transparent, and comparable across the world’s largest capital market. Its 10 core principles — from regularity and consistency through to utmost good faith — are not bureaucratic rules but practical standards that protect investors, support business credibility, and reduce the risk of financial misstatement.
For businesses operating in Singapore with connections to US markets — whether through a US-listed parent, US investors, or cross-border financing — understanding US GAAP and its interaction with Singapore’s SFRS framework is essential. The right audit and advisory partner can bridge both worlds, helping businesses meet their reporting obligations without unnecessary complexity.
TY Teoh’s team of experienced professionals works with multinational corporations across Singapore and the region to navigate US GAAP compliance, SFRS reconciliation, and cross-border financial reporting. Contact us to discuss how we can support your business.
Disclaimer: This article is intended for general informational purposes and does not constitute accounting or legal advice. Businesses should consult a qualified professional regarding their specific reporting obligations.
Frequently Asked Questions (FAQ)
US GAAP is updated by the FASB through Accounting Standards Updates (ASUs). The FASB follows a formal due process that includes research, stakeholder consultation, public exposure drafts, and a comment period before any standard is finalised. This ensures that updates reflect input from preparers, auditors, investors, and other users of financial statements.
Yes. Some multinational companies prepare two sets of financial statements — one under US GAAP for SEC reporting and one under IFRS for other jurisdictions. In practice, most companies maintain one primary set of accounts and prepare reconciliation adjustments for the secondary framework. Foreign private issuers listed in the US may file under IFRS without a GAAP reconciliation, provided they use IFRS as issued by the IASB.
US GAAP is mandatory for companies listed on US stock exchanges. However, many private companies — particularly those seeking bank financing, preparing for an IPO, or operating as subsidiaries of US-listed parents — also apply GAAP voluntarily or as a contractual requirement. See our guide on GAAP for small businesses for a practical overview of what this means in practice.
Yes. A Singapore subsidiary that prepares its statutory accounts under SFRS can prepare a separate set of management accounts or reconciliation schedules aligned with US GAAP for the purpose of consolidation into a US-listed parent’s group accounts. The key differences to address typically include inventory costing, development cost capitalisation, and any lease accounting differences. An audit firm with both SFRS and US GAAP expertise can manage this process.
Singapore Exchange (SGX)-listed companies are generally required to report under SFRS. However, foreign issuers listed on the SGX may be permitted to use IFRS or, in some cases, US GAAP, depending on their primary listing jurisdiction and SGX listing rules. Companies should confirm with their auditors and the SGX whether an exemption applies to their specific circumstances.
The most significant practical differences for Singapore businesses include: LIFO inventory costing (permitted under GAAP, prohibited under SFRS/IFRS), capitalisation of development costs (required expensing under GAAP, optional capitalisation under IFRS 15), revaluation of property, plant and equipment (not permitted under GAAP, permitted under IFRS), and certain differences in lease and financial instrument accounting.
Adopting US GAAP for financial reporting purposes does not change a Singapore company’s obligations under the Inland Revenue Authority of Singapore (IRAS). Singapore corporate tax is assessed based on accounts prepared under SFRS, with specific IRAS adjustments. For a full breakdown, read our article on US GAAP vs tax accounting for Singapore businesses. Where a company prepares US GAAP accounts for consolidation purposes, it will typically maintain SFRS accounts as the statutory basis. From an audit perspective, audit firms engaged to audit US GAAP financial statements or components thereof for a US-listed group must comply with PCAOB standards in addition to local Singapore Standards on Auditing (SSAs).
