Q.Explain the canons of taxation given by Adam Smith.

Adam Smith laid down four classic principles that any good tax should satisfy, covering fairness, predictability, convenience and cost of collection. …

In The Wealth of Nations (1776), Adam Smith laid down four fundamental principles — the canons of taxation — that a well-designed tax system should follow. These remain the standard reference point in the study of public finance across Indian intermediate/PUC economics courses, including this Andhra Pradesh Intermediate syllabus.

1. Canon of Equity. The burden of taxation should be distributed among the citizens broadly in proportion to their ability to pay — those with a greater capacity to pay (higher income or wealth) should contribute a larger share. This is the basis for progressive direct taxes such as income tax.

2. Canon of Certainty. The tax payable by an individual should not be arbitrary; the amount, the time of payment, and the manner of payment should all be clear and certain, both to the tax payer and to the government. Uncertainty in taxation opens the door to harassment and corruption in collection.

3. Canon of Convenience. A tax should be levied and collected in a manner and at a time that is most convenient for the contributor to pay — for example, collecting agricultural income tax after harvest, or salaried income tax through monthly deduction at source rather than a single lump sum.

4. Canon of Economy. The cost of collecting a tax should be kept as small as possible relative to the revenue it actually yields to the government; a tax whose collection machinery consumes a large share of what it raises is inefficient and self-defeating. …

Students sometimes list only two or three canons, or confuse 'equity' with 'equality' (equal tax for everyone) — Smith's equity specifically means proportio …