Accounting methods and principles
Financial ratios may not be directly comparable between companies that use different accounting methods or follow various standard accounting practices. Most public companies are required by law to use generally accepted accounting principles for their home countries, but private companies, partnerships and sole proprietorships may not use accrual basis accounting. Large multi-national corporations may use International Financial Reporting Standards to produce their financial statements, or they may use the generally accepted accounting principles of their home country.
There is no international standard for calculating the summary data presented in all financial statements, and the terminology is not always consistent between companies, industries, countries and time periods.
Abbreviations and terminology
Various abbreviations may be used in financial statements, especially financial statements summarized on the Internet. Sales reported by a firm are usually net sales, which deduct returns, allowances, and early payment discounts from the charge on an invoice. Net income is always the amount after taxes, depreciation, amortization, and interest, unless otherwise stated. Otherwise, the amount would be EBIT, or EBITDA
Companies that are primarily involved in providing services with labour do not generally report “Sales” based on hours. These companies tend to report “revenue” based on the monetary value of income that the services provide.
Note that Shareholder’s Equity and Owner’s Equity are not the same thing, Shareholder’s Equity represents the total number of shares in the company multiplied by each share’s book value; Owner’s Equity represents the total number of shares that an individual shareholder owns (usually the owner with controlling interest), multiplied by each share’s book value. It is important to make this distinction when calculating ratios.