Income Inequality in America: 5 Charts

Income inequality is the measure of who gets what when the economy grows. For a generation after World War II, the answer was roughly "everyone, together" — pay rose across the income ladder as the country got richer. Then, starting around the late 1970s, that broad sharing ended. The economy kept expanding. The gains stopped reaching most workers and started piling up at the top.

That shift is the engine behind nearly every affordability grievance on this site. When most of a growing economy's rewards flow to a small slice at the top, the typical paycheck stalls — even as the cost of housing, healthcare, and education sprints ahead. This is the definitive breakdown of what happened, by the numbers.

What is income inequality, and how is it measured?

Income inequality describes how unevenly yearly earnings are spread across households. Economists track it a few ways: the share of total income going to the top 1% or top 10%, the ratio of high earners to low earners, and measures like the Gini coefficient. By all of them, the U.S. has grown markedly more unequal since the 1970s, and it ranks among the most unequal of wealthy nations.

The cleanest way to see it is the gap between productivity and pay. The Economic Policy Institute has documented for years that worker productivity — output per hour — climbed dramatically since 1979, while the pay of a typical worker grew only a small fraction as much. The economy produced far more per worker. Most workers didn't see it in their checks.

Where did the money go?

Upward. As the productivity–pay gap opened, the income the economy generated concentrated at the top. The share of total income captured by the highest earners rose substantially, and the most visible symbol is executive pay. CEO compensation at large firms climbed to roughly 290 to 340 times the pay of a typical worker (EPI), up from a ratio in the low double digits in the 1960s and 70s.

That ratio isn't just a talking point — it's a snapshot of the whole shift. We break it down in CEO-to-worker pay: the 21-lifetimes problem. When the person at the top earns in a day what a worker earns in a year, the question of where the gains went answers itself.

What's the difference between income and wealth inequality?

Income inequality is about the yearly flow — what you earn. Wealth inequality is about the accumulated stock — what you own: homes, savings, retirement accounts, stocks. The two are linked but distinct, and wealth is even more concentrated than income in the U.S. (Federal Reserve Survey of Consumer Finances). High earners save and invest their surplus, which compounds into assets, while households living paycheck to paycheck accumulate nothing.

That compounding is why inequality entrenches across generations. We cover the asset side in wealth inequality in America and the wealth gap in America. Income inequality is the faucet; wealth inequality is the bathtub it fills over decades.

How does income inequality hit ordinary people?

Through stalled wages colliding with rising costs. When the economy's gains bypass typical workers, the median paycheck barely grows after inflation — while housing climbs to roughly five times income, family health premiums reach around $25,000 a year (KFF), and college costs explode. The result is a growing economy in which more households still live one paycheck from the edge.

The federal minimum wage frozen at $7.25 since 2009 (U.S. Dept. of Labor) is the floor-level version of the same story: the bottom didn't rise even as the top soared. Inequality isn't an abstraction for low- and middle-income families. It's the reason a bigger economy didn't translate into a more affordable life.

What's the real cause — and the fix?

Income inequality didn't happen by accident. It tracks specific choices: a frozen wage floor, eroding bargaining power for workers, tax and policy changes that favored capital over labor, and the breaking of the productivity–pay link. Each of those is a decision, which means each can be revisited.

The way back doesn't require punishing success. It requires reconnecting work to reward — making sure that when the economy grows, the gains reach the people producing them. Lifting the wage floor, restoring worker bargaining power, and ensuring full-time work covers a full life are the direct levers. Income inequality is the structural heart of the broken American Dream: the economy got richer, and most people didn't. Fixing that is the whole point of the fight for a living wage.