# Generally Accepted Accounting Principles (GAAP): Definition and Rules

U.S. public companies must follow the GAAP rules in preparing their financial statements

> **Definition**
>
> GAAP stands for generally accepted accounting principles, which set the criteria for preparing, presenting, and reporting financial statements in the U.S.

## What Are the Generally Accepted Accounting Principles (GAAP)?

The generally accepted accounting principles (GAAP) are a set of accounting rules, standards, and procedures issued and frequently revised by the [Financial Accounting Standards Board (FASB)](https://www.investopedia.com/terms/f/fasb.asp) and the Governmental Accounting Standards Board (GASB). These principles ensure consistency, accuracy, and transparency in financial reporting across various industries in the United States. Public companies must follow GAAP when preparing their financial statements, which is also widely used in governmental accounting.  

### Key Takeaways

*   GAAP stands for generally accepted accounting principles, which set the standard accounting rules for preparing, presenting, and reporting financial statements in the U.S.
*   The goal of GAAP is to ensure that a company's financial statements are complete, consistent, and comparable.
*   GAAP may be contrasted with pro forma accounting, a non-GAAP financial reporting method.
*   GAAP is used mainly in the U.S., while most other countries follow the international financial reporting standards (IFRS).
*   GAAP is also used by states and other government entities in the U.S. to prepare their financial statements.

![Generally Accepted Accounting Principles (GAAP)](https://www.investopedia.com/thmb/SrMy3iP8G5TKCrGbLgW9GxTlnLo=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/gaap.asp-Final-fcd73bc9aa6a4833bcb7f2bfe8bd3208.png)

*— Theresa Chiechi / Investopedia*

## Understanding GAAP

GAAP combines authoritative standards set by policy boards and widely accepted methods for recording and reporting accounting information. It covers [revenue recognition](https://www.investopedia.com/terms/r/revenuerecognition.asp), [balance sheet](https://www.investopedia.com/terms/b/balancesheet.asp) classification, and materiality.

The main objective of GAAP is to ensure that a company's [financial statements](https://www.investopedia.com/terms/f/financial-statements.asp) are complete, consistent, and comparable, allowing investors to analyze and extract [useful information from financial statements](https://www.investopedia.com/terms/s/sfac.asp). It also facilitates the comparison of financial information across different companies.

Unlike [pro forma](https://www.investopedia.com/terms/p/proforma.asp) accounting, a [non-GAAP](https://www.investopedia.com/terms/n/non-gaap-earnings.asp) method, GAAP provides a standardized framework. Internationally, the equivalent standard is the [international financial reporting standards (IFRS)](https://www.investopedia.com/terms/i/ifrs.asp), used in 168 jurisdictions worldwide.

GAAP is also utilized by government entities. All 50 states follow GAAP, and many local entities, such as counties, cities, towns, and school districts, must adhere to these principles.

## Compliance With GAAP

If a corporation's stock is [publicly traded](https://www.investopedia.com/terms/p/publiccompany.asp), its financial statements must follow rules set by the U.S. [Securities and Exchange Commission (SEC)](https://www.investopedia.com/terms/s/sec.asp). The SEC mandates that publicly traded companies in the U.S. file GAAP-compliant financial statements regularly to maintain their public listing on stock exchanges. GAAP compliance is verified through an appropriate [auditor's opinion](https://www.investopedia.com/terms/a/auditors-opinion.asp), resulting from an external audit by a [certified public accounting (CPA)](https://www.investopedia.com/terms/c/cpa.asp) firm.

While non-publicly traded companies aren't required to follow GAAP, it is still highly regarded by lenders and creditors. Most financial institutions require annual GAAP-compliant financial statements as a part of their debt [covenants](https://www.investopedia.com/terms/c/covenant.asp) when issuing business loans, leading many U.S. companies to adopt GAAP.

Investors should be cautious if a financial statement isn't prepared using GAAP. Comparing financial statements across different companies—even within the same industry—becomes challenging without GAAP. Some companies may use GAAP and non-GAAP measures to report their financial results. GAAP regulations require that non-GAAP measures be identified in financial statements and other public disclosures, such as press releases.

> **Warning**
>
> Even with GAAP's transparency rules, financial statements can still contain errors or misleading information. Always scrutinize financial statements, as there's potential for manipulation within GAAP's framework.

## GAAP vs. IFRS

The international financial reporting standards (IFRS), set by the [International Accounting Standards Board (IASB)](https://www.investopedia.com/terms/i/ias.asp), is an alternative to GAAP that is widely used worldwide.

One key difference between GAAP and IFRS is the [treatment of inventory](https://www.investopedia.com/ask/answers/05/070105.asp). IFRS rules ban using [last-in, first-out (LIFO)](https://www.investopedia.com/terms/l/lifo.asp) inventory accounting methods, whereas GAAP permits LIFO. Both systems accept the [first-in, first-out (FIFO)](https://www.investopedia.com/terms/f/fifo.asp) and weighted average-cost methods.

Since 2002, the IASB and the FASB have worked to align [IFRS and GAAP](https://www.investopedia.com/ask/answers/09/ifrs-gaap.asp). A significant milestone was reached in 2007 when the SEC allowed non-U.S. companies registered in the U.S. to use IFRS without reconciling to GAAP. This was a big achievement because it eliminated the need for non-U.S. companies on U.S. exchanges to provide GAAP-compliant financial statements.

As global operations and markets expand, international standards like IFRS are gaining traction, even in the U.S. Nearly all S&P 500 companies report at least one non-GAAP measure in their financial statements. This trend is evident in the widespread use of several non-GAAP metrics, with 77% of S&P 500 companies reporting adjusted earnings, 77% using adjusted EPS (earnings per share), and 29% reporting EBITDA or adjusted EBITDA.

Since much of the world uses the IFRS standard, a [convergence to IFRS](https://www.investopedia.com/articles/economics/12/impact-gaap-ifrs-convergence.asp) could benefit international corporations and investors alike.

#### Some Key Differences Between IFRS and GAAP

## Where Are Generally Accepted Accounting Principles (GAAP) Used?

GAAP is used primarily in the United States, while the international financial reporting standards (IFRS) are in wider use internationally.

## Why Is GAAP Important?

GAAP is crucial for maintaining trust in the financial markets. Without GAAP, investors might be more reluctant to trust the information presented to them by public companies. Without that trust, fewer transactions and higher transaction costs could result, ultimately weakening the economy. GAAP also helps investors analyze companies by making it easier to perform "apples-to-apples" comparisons between one company and another, allowing for more accurate and consistent analysis.

## What Are Non-GAAP Measures?

Companies can present certain figures without following GAAP guidelines, as long as they identify them as non-GAAP. Companies sometimes do that when they believe the GAAP rules don't fully capture specific operational nuances. In such cases, they may provide specially designed non-GAAP metrics alongside the required GAAP disclosures. However, investors should be cautious with non-GAAP measures, as they can sometimes be used to present a misleading view of a company's performance.

## The Bottom Line

GAAP is meant to ensure consistency, accuracy, and transparency in financial reporting and aims to provide a reliable foundation for investors to make informed decisions. While [the rules established under GAAP](https://www.investopedia.com/ask/answers/021315/when-and-why-were-gaap-first-established.asp) generally improve the transparency in financial statements, they don't guarantee that a company's financial statements are free from errors or omissions meant to mislead investors. Always scrutinize financial statements, as there can still be room for manipulation within the framework of GAAP.

> **Article Sources**
>
> 1.  Financial Accounting Standards Board. "[About the FASB](https://fasb.org/about-us/about-the-fasb)."
>     
> 2.  Financial Accounting Foundation. "[GAAP and State and Local Governments](https://www.accountingfoundation.org/page/pccAccordion?pageId=/accounting-and-standards/about-gaap/gaap-and-state-local-governments.html)."
>     
> 3.  U.S. Securities and Exchange Commission. "[Regulation S-K](https://www.sec.gov/divisions/corpfin/guidance/regs-kinterp.htm)."
>     
> 4.  U.S. Securities and Exchange Commission. "[Non-GAAP Financial Measures](https://www.sec.gov/corpfin/non-gaap-financial-measures.htm)."
>     
> 5.  International Financial Reporting Standards. "[Who We Are](https://www.ifrs.org/about-us/who-we-are/)."
>     
> 6.  Harvard Business School Online. "[GAAP vs. IFRS: What Are the Key Differences and Which Should You Use?](https://online.hbs.edu/blog/post/gaap-vs-ifrs)"
>     
> 7.  Financial Accounting Standards Board. "[Comparability in International Accounting Standards: A Brief History](https://www.fasb.org/page/PageContent?pageId=/international/briefhistory.html&bcpath=ff&isStaticPage=true)."
>     
> 8.  U.S. Securities and Exchange Commission. "[Acceptance From Foreign Private Issuers of Financial Statements Prepared in Accordance With International Financial Reporting Standards Without Reconciliation to U.S. GAAP](https://www.sec.gov/rules/final/2007/33-8879.pdf)." Pages 7-8.
>     
> 9.  Harvard Law School Forum on Corporate Governance. "[SEC Scrutiny of Non-GAAP Financial Measures](https://corpgov.law.harvard.edu/2019/02/07/sec-scrutiny-of-non-gaap-financial-measures/)."
>     
> 10.  The Center for Audit Quality. "[The Role of Auditors in Non-GAAP Financial Measures and Key Performance Indicators: Present and Future](https://www.thecaq.org/the-role-of-auditors-in-non-gaap-financial-measures-and-key-performance-indicators-present-and-future)."
>      
> 11.  U.S. Securities and Exchange Commission. "[Non-GAAP Financial Measures](https://www.sec.gov/corpfin/non-gaap-financial-measures.htm#:~:text=Presenting%20a%20non%2DGAAP%20performance,measure%20that%20could%20be%20misleading.)."