Those parts of the economy which operate through institutions which feed figures into official statistics. This includes firms organized as companies, payments made via the banking system, incomes reported to the tax authorities, sales reported to the VAT authorities, and employment reported to the National Insurance authorities. These constitute the vast majority of total economic activity in advanced economies. The organized sector is contrasted with the informal or unofficial economy, in which individuals, voluntary bodies and criminal organizations engage in trade, mainly for cash, which is not reported to the tax authorities, and employment, also for cash, which is not reported to the tax or social security authorities. In national income accounts, data on the organized sector is largely based on written records of transactions, while data on the informal sector is based on guesswork.

• investment income surcharge
• investment in stocks and work in progress
• Investment Management Regulatory Organization
• investment trust
• investor, relationship
• invisible balance
• invisible hand
• invisibles
• involuntary unemployment
• inward investment
• IOU
• irredeemable security
• irreversibility
• irrigation
• IRS
• IS curve
• IS-LM model
• isocost curve
• isoquant
• issue
• issued capital
• J-curve
• job
• job acceptance schedule
• jobber