Wealth of Nations

Part II. Of Taxes

The private revenue of individuals, it has been shown in the first book of this Inquiry, arises, ultimately from three different sources; rent, profit, and wages. Every tax must finally be paid from some one or other of those three different sources of revenue, or from all of them indifferently. I shall endeavor to give the best account I can: first, of those taxes which, it is intended should fall upon rent; secondly, of those which, it is intended should fall upon profit; thirdly, of those which, it is intended should fall upon wages; and fourthly, of those which, it is intended should fall indifferently upon all those three different sources of private revenue. The particular consideration of each of these four different sorts of taxes will divide the second part of the present chapter into four articles, three of which will require several other subdivisions. Many of these taxes, it will appear from the following review, are not finally paid from the fund, or source of revenue, upon which it is intended they should fall.

Before I enter upon the examination of particular taxes, it is necessary to premise the four following maxims with regard to taxes in general.

1. The subjects of every state ought to contribute towards the support of the government, as nearly as possible, in proportion to their respective abilities; that is, in proportion to the revenue which they respectively enjoy under the protection of the state. The expense of government to the individuals of a great nation, is like the expense of management to the joint tenants of a great estate, who are all obliged to contribute in proportion to their respective interests in the estate. In the observation or neglect of this maxim, consists what is called the equality or inequality of taxation. Every tax, it must be observed once for all, which falls finally upon one only of the three sorts of revenue above mentioned, is necessarily unequal, in so far as it does not affect the other two. In the following examination of different taxes, I shall seldom take much farther notice of this sort of inequality; but shall, in most cases, confine my observations to that inequality which is occasioned by a particular tax falling unequally upon that particular sort of private revenue which is affected by it.

2. The tax which each individual is bound to pay, ought to be certain and not arbitrary. The time of payment, the manner of payment, the quantity to be paid, ought all to be clear and plain to the contributor, and to every other person. Where it is otherwise, every person subject to the tax is put more or less in the power of the tax-gatherer, who can either aggravate the tax upon any obnoxious contributor, or extort, by the terror of such aggravation, some present or perquisite to himself. The uncertainty of taxation encourages the insolence, and favors the corruption, of an order of men who are naturally unpopular, even where they are neither insolent nor corrupt. The certainty of what each individual ought to pay is, in taxation, a matter of so great importance, that a very considerable degree of inequality, it appears, I believe, from the experience of all nations, is not near so great an evil as a very small degree of uncertainty.