Income tax in the United States income and tax it, so long as it acts within its constitutional authority, which includes not only the Sixteenth Amendment but also Article I, Sections 8 and 9." Similarly, in "Penn Mutual Indemnity Co. v. Commissioner", the United States Court of Appeals for the Third Circuit indicated that Congress could properly impose the federal income tax on a receipt of money, regardless of what that receipt of money is called: It could well be argued that the tax involved here [an income tax] is an "excise tax" based upon the receipt of money by the taxpayer. It certainly is not
Income tax in the Netherlands as "boxes". There is a progressive tax on wages, profits, social security benefits and pensions. Thus there are tax brackets, each with its own tax rate. Mathematically, apart from discretization (whole euros both for income and for tax), the tax is a continuous, convex, piecewise linear function of income. For 2010, income tax for people under the age 65 is as follows For 2010, the total tax on income (income tax plus mandatory pension, social security and state funded medical care payments, all of which are a percentage of income up to a maximum) for people under the age 65