Progressive Tax
Tax Glossary Term
Definition
A progressive tax is a tax system where the rate increases as the taxable amount increases. The US federal income tax is the most prominent example, with seven brackets ranging from 10.0% to 37.0% for 2026. The design principle is that higher-income taxpayers can afford to pay a larger percentage of their income in tax, while lower-income taxpayers keep a larger share. In a progressive system, everyone benefits from the lower rates on their initial dollars of income. A millionaire pays the same 10.0% on their first $12,400 as someone earning $30,000. This is different from a flat tax, where a single rate applies to all income, and a regressive tax, where the effective rate decreases as income rises (sales taxes are often considered regressive because lower-income households spend a larger share of their income on taxable goods). The progressive structure creates the distinction between marginal and effective tax rates. Your marginal rate (the rate on your last dollar) is higher than your effective rate (total tax divided by total income). Progressive taxation also means that deductions are worth more to higher-income taxpayers — a $10,000 deduction saves $3,700 for someone in the 37.0% bracket but only $1,000 for someone in the 10.0% bracket. Critics argue this creates complexity and can discourage additional work or investment at the margin, while supporters view it as a fairer distribution of the tax burden.
Example
Two single filers in 2026:
Filer A: $30,000 taxable, tax ~$3,362, effective rate: 11.2%
Filer B: $300,000 taxable, tax ~$68,413, effective rate: 22.8%
Higher income = higher effective rate