Financial accounting provides information to external decision makers such as shareholders and creditors. It measures a business's economic activity to provide useful information for decisions. Financial accounting information is used to evaluate a company's performance and decide whether to invest in or lend to the business. Managerial accounting provides more detailed internal information for managers to make decisions about new plants, advertising spending, equipment purchases, and more. Tax accounting involves tax compliance like filing tax forms and tax planning to structure transactions in a tax-efficient way.