A tariff imposed principally as a source of government revenue. This is contrasted with a protective tariff, imposed mainly as a means of assisting domestic producers to compete with imports. Many actual tariffs have effects in both ways, though a tariff on goods a country does not produce is clearly for revenue purposes only, while a prohibitive tariff can only be protective as it raises no revenue. Revenue tariffs are important for many less developed countries (LDCs), which find difficulty in collecting taxes from a largely informal internal economy.

• inferior good
• infinitesimal
• infinity
• inflation
• inflation accounting
• inflation-adjusted budget deficit
• inflationary gap
• inflationary spiral
• inflation tax
• inflection, point of
• inflow, capital
• information
• information agreement
• infrastructure
• inheritance tax
• initial conditions
• injections to the circular flow of incomes
• Inland Revenue
• innocent entry barriers
• innovation
• input-output
• input prices
• inputs
• inside money
• insider dealing