when is federal income tax due 
generally federal income tax is due on april 15 of every year the day can shift slightly if april 15 falls on a weekend or because of other factors 37the bottom linefederal income taxes are considered a marginal tax or progressive tax and apply to all forms of earnings that make up a taxpayer s taxable income including wages salaries commissions bonuses tips investment income and certain types of unearned income each year the irs releases updates to the tax brackets and rates that apply to single filers married individuals filing joint returns or separately and heads of households 