Cause. Hives can also be classified by the purported causative agent. Many different substances in the environment may cause hives, including medications, food and physical agents. In perhaps more than 50% of people with chronic hives of unknown cause, it is due to an autoimmune reaction. Medications
The average American pays almost 30% of their income to taxes. Here's the breakdown. According to the IRS's preliminary data from the 2015 tax year (the returns you filed during 2016), there was a total of $1.454 trillion in income tax owed, which translates to an average effective federal income tax rate of about 13.5% per return.
Taxes Â» Tax Brackets. Taxpayers fall into one of 7 brackets, depending on their taxable income: 10%, 15%, 25%, 28%, 33%, 35% or 39.6%. Because the U.S. tax system is a progressive one, as income rises, increasingly higher taxes are imposed. But those in the highest bracket dont pay the highest rate on all their income. For example, in 2016, single individuals pay 39.6% only on income above $415,050 (above $466,950 for married filing jointly); the lower tax rates are levied at the income brackets below that amount, as shown in the table below.