Regressive Tax

What Does Regressive Tax Mean?
A tax that takes a larger percentage from low-income people than from high-income people. A regressive tax is generally a tax that is applied uniformly. This means that it hits lower-income individuals harder.

Investopedia explains Regressive Tax
Some examples include gas tax and cigarette tax. For example, if a person has $10 of income and must pay $1 of tax on a package of cigarettes, this represents 10% of the person's income. However, if the person has $20 of income, this $1 tax only represents 5% of that person's income.

Sales taxes that apply to essentials are generally considered to be regressive as well because expenses for food, clothing and shelter tend to make up a higher percentage of a lower income consumer's overall budget. In this case, even though the tax may be uniform (such as 7% sales tax), lower income consumers are more affected by it because they are less able to afford it.