Income statement
An income statement or profit and loss account (also referred to as a profit and loss statement (P&L), statement of profit or loss, revenue statement, statement of financial performance, earnings statement, statement of earnings, operating statement, or statement of operations) is one of the financial statements of a company and shows the company's revenues and expenses during a particular period. It indicates how the revenues (also known as the "“top line”") are transformed into the net income or net profit (the result after all revenues and expenses have been accounted for). The purpose of the income statement  is to show managers and investors whether the company made money (profit) or lost money (loss) during the period being reported. An income statement represents a period of time (as does the cash flow statement). This contrasts with the balance sheet, which represents a single moment in time. Charitable organizations that are required to publish financial statements do not produce an income statement. Instead, they produce a similar statement that reflects funding sources compared against program expenses, administrative costs, and other operating commitments. This statement is commonly referred to as the "statement of activities". Revenues and expenses are further categorized  in the statement of activities by the donor restrictions on the funds received and expended. The income statement can be prepared in one of two methods. The Single Step income statement totals revenues and subtracts expenses to find the bottom line. The Multi-Step income statement takes several steps to find the bottom line: starting with the gross profit, then calculating operating expenses. Then when deducted from the gross profit, yields income from operations. Adding to income from operations is the difference of other revenues and other expenses. When combined with income from operations, this yields income before taxes. The  final step is to deduct taxes, which finally produces the net income for the period measured. Usefulness and limitations of income statement. Income statements may help investors and creditors determine the past financial performance of the enterprise, predict the future performance, and assess the capability of generating future cash flows using the report of income and expenses. Its very important for the business. However, information of an income statement has several limitations: Guidelines for statements of comprehensive income and income statements of business entities are formulated by the International Accounting Standards Board and numerous country-specific organizations, for example the  FASB in the U.S.. Names and usage of different accounts in the income statement depend on the type of organization, industry practices and the requirements of different jurisdictions. If applicable to the business, summary values for the following items should be included in the income statement: Operating section. "Expenses" recognised in the income statement should be analysed either by nature (raw materials, transport costs, staffing costs, depreciation, employee benefit etc.) or by function (cost of sales, selling, administrative, etc.). (IAS 1.99) If an entity categorises by function, then additional information on the nature of expenses, at least, – depreciation, amortisation and  employee benefits expense – must be disclosed. (IAS 1.104) The major exclusive of costs of goods sold, are classified as operating expenses. These represent the resources expended, except for inventory purchases, in generating the revenue for the period. Expenses often are divided into two broad sub classicifications selling expenses and administrative expenses. Irregular items. They are reported separately because this way users can better predict future cash flows - irregular items most likely will not recur. These are reported net of taxes. Cumulative effect of changes in accounting policies (principles) is the difference between the book value of the affected assets (or  liabilities) under the old policy (principle) and what the book value would have been if the new principle had been applied in the prior periods. For example, valuation of inventories using LIFO instead of weighted average method. The changes should be applied retrospectively and shown as adjustments to the "beginning" balance of affected components in Equity. All comparative financial statements should be restated. (IAS 8) However, changes in estimates (e.g., estimated useful life of a fixed asset) only requires prospective changes. (IAS 8) No items may be presented in the income statement as extraordinary items under IFRS regulations, but are  permissible under US GAAP. (IAS 1.87) "Extraordinary items" are both unusual (abnormal) and infrequent, for example, unexpected natural disaster, expropriation, prohibitions under new regulations. [Note: natural disaster might not qualify depending on location (e.g., frost damage would not qualify in Canada but would in the tropics).] Additional items may be needed to fairly present the entity's results of operations. (IAS 1.85) Disclosures. Certain items must be disclosed separately in the notes (or the statement of comprehensive income), if material, including: (IAS 1.98) Earnings per share. Because of its importance, earnings per share (EPS) are required to be disclosed on  the face of the income statement. A company which reports any of the irregular items must also report EPS for these items either in the statement or in the notes. formula_1 There are two forms of EPS reported: Sample income statement. The following income statement is a very brief example prepared in accordance with IFRS. It does not show all possible kinds of accounts, but it shows the most usual ones. Differences between IFRS and US GAAP would affect the interpretation of the following sample income statements. Bottom line. “Bottom line” is the net income that is calculated after subtracting  the expenses from revenue. Since this forms the last line of the income statement, it is informally called “bottom line.” It is important to investors as it represents the profit for the year attributable to the shareholders. After revision to IAS 1 in 2003, the Standard is now using profit or loss for the year rather than "net profit or loss" or "net income" as the descriptive term for the bottom line of the income statement. Requirements of IFRS. On 6 September 2007, the International Accounting Standards Board issued a revised "IAS 1: Presentation of Financial Statements", which is effective  for annual periods beginning on or after 1 January 2009. A business entity adopting IFRS must include: All non-owner changes in equity (i.e., "comprehensive income") shall be presented either in the statement of comprehensive income or in a separate income statement and a statement of comprehensive income. Components of comprehensive income may not be presented in the statement of changes in equity. "Comprehensive income" for a period includes profit or loss (net income) for that period and other comprehensive income recognised in that period. All items of income and expense recognised in a period must be included in profit  or loss unless a Standard or an Interpretation requires otherwise. (IAS 1.88) Some IFRSs require or permit that some components to be excluded from profit or loss and instead to be included in other comprehensive income. (IAS 1.89) Items and disclosures. The statement of comprehensive income should include: (IAS 1.82) The following items must also be disclosed in the statement of comprehensive income as allocations for the period: (IAS 1.83) "No" items may be presented in the statement of comprehensive income (or in the income statement, if separately presented) or in the notes as "extraordinary items".