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.
What is the highest marginal tax rate in the United States? By Investopedia | February 24, 2015 â 5:11 PM EST. A: In a marginal tax rate system, such as the one found in the United States, the more income one makes, the more one is expected to pay per dollar in income taxes. The IRS readjusts these numbers annually, so make sure that you are looking at the right income tax rate for the right year. For income made in 2015, the highest marginal income tax rate in the U.S. has been set at 39.6%. That will apply to single filers who made more than $413,201, to married joint filers who made over $464,850 and to heads of household who made at least $439,001.