That's up from about 84 percent last year.
The increase comes thanks to the tax-reform bill passed in December, which kept the progressive structure of the US tax code.
The new law reduced taxes for all income levels. Doing so increased the percentage of the total paid by workers earning $150,000 or more.
To New Yorkers, earning a $150,000 salary may not sound like it will make you rich, but it's the dividing line that puts a worker into the top 20 percent of American earners. That's the group that includes people with last names like Buffett, Bezos and Zuckerberg.
The biggest beneficiaries of the new tax structure are those earning between $300,000 to $733,000, according to the analysis. They'll see an average tax cut of about 3.4 percent, taking home an extra $11,200 this year on average.
The top 1 percent get a smaller break on a percentage basis, about 2.2 percent, but they will keep on average about $32,650 more.
Overall, about two-thirds of taxpayers are in line for a tax cut. About 6 percent will pay more, while the rest will see no significant change.
Most families earning under $50,000 a year will pay no federal income taxes at all, and many will get money back, due to measures like the increased standard deduction and the child tax credit.
The analysis doesn't consider how much workers pay in Social Security and Medicare taxes, which are taken out of all paychecks, or state and local income, property or sales taxes.
Because of income disparities in different parts of the country, the law reduces the income-tax hit by different amounts on a state-by-state basis. High-earning states like New York, New Jersey and Connecticut each get a 5-to-6 percent federal income-tax cut overall, the low end of the scale. Low-wage states such as North and South Dakota will both get closer to a 10-percent tax cut, the top end of the scale, according to the study.
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