A Little Tax History
The first income tax suggested in the United States was during the War of 1812. The tax was based on the British Tax Act of 1798 and applied progressive rates to income. The tax was developed in 1814 but was never imposed because the treaty of Ghent was signed in 1815, ending hostilities and the need for additional revenue.
Several tax acts were proposed and passed in the 1860s. The Tax Act of 1861 proposed broad income taxation on any kind of income or wages earned by every person in the U.S. In 1864, a new tax act was passed to raise additional funds for the Civil War and reintroduced a sliding tax scale.