Generally accepted accounting principles (GAAP) are the standard framework of guidelines for financial accounting used in any given jurisdiction; generally known as accounting standards or standard accounting practice. These include the standards, conventions, and rules that accountants follow in recording and summarizing and in the preparation of financial statements. Many businesses choose to "opt out" of GAAP practices as they operate on a cash basis, as opposed to an accrual basis. A comparison would be the way that most people balance their checkbooks: when a check is written, its amount is deducted from the total balance even though the funds have not yet left the account. Financial decisions made after the check is written are based on the balance after the check is deducted.
The main parts to GAAP are entity, going concern, monetary unit and the time frame in question.
Generally accepted accounting principles Wikipedia
InternationalInternational Financial Reporting Standards
Domestic examplesChina - Chinese Accounting Standards (Zhōngguó qǐyè kuàijì zhǔnzé 中国企业会计准则)
Canada - Generally Accepted Accounting Principles
France - Generally Accepted Accounting Practice (Plan Comptable Général)
Germany - Generally Accepted Accounting Practice (Grundsätze ordnungsmäßiger Buchführung)
India - Generally Accepted Accounting Practice
Russia - Generally Accepted Accounting Practice (RAP)
United Kingdom - Generally Accepted Accounting Practice
United States - Generally Accepted Accounting Principles
Many countries use or are converging on the International Financial Reporting Standards (IFRS) that were established and are maintained by the International Accounting Standards Board. In some countries, local accounting principles are applied for regular companies but listed or large companies must conform to IFRS, so statutory reporting is comparable internationally.
All listed and grouped EU companies have been required to use IFRS since 2005, Canada moved in 2009, Taiwan in 2013, and other countries are adopting local versions.
In the United States, while "...the SEC published a statement of continued support for a single set of high-quality, globally accepted accounting standards, and acknowledged that IFRS is best positioned to serve this role..." progress is less evident.