From the overview:
There is significant room for improvement in state and local tax codes. Income tax laws are filled with top-heavy exemptions and deductions. Sales tax bases are too narrow and need updating. And overall tax collections are often inadequate in the short-run and unsustainable in the long-run. In this light, the growing interest in tax reform among state lawmakers across the country is welcome news.
Too often, however, would-be tax reformers have proposed policy changes that would worsen one of the most undesirable features of state and local tax systems: their lopsided impact on taxpayers at varying income levels. Nationwide, the bottom 20 percent of earners pay 10.9 percent of their income in state and local taxes each year. Middle-income families pay a slightly lower 9.4 percent average rate. But the top 1 percent of earners pay just 5.4 percent of their income in such taxes. This is the definition of regressive, upside-down tax policy.
State and local tax systems add to the nation’s growing income inequality problem when they capture a greater share of income from low- or moderate-income taxpayers. Further, state tax systems that ask the most of families with the least are not well-suited to generate the revenues needed to fund schools, health care, infrastructure, and other public services that are crucial to building thriving communities. This problem is particularly acute in the long run since regressive tax systems depend more heavily on low-income families that face stagnating incomes while taxing the superrich, whose wealth and incomes continue to grow, at lower rates.
As the information in this chart book helps illustrate, it does not have to be this way. States vary considerably in the fairness of their tax codes, and pursuing policies adopted by states with the least regressive tax systems is a proven strategy for reducing tax inequity.