Under Biden's plan, the top 1% of Americans would pay an extra $100,000 in taxes every year

• Biden wants to increase taxes on the highest-earning Americans to offset his spending plans.
• His proposed increases would basically only impact the top of 1% of Americans, according to a report.
• Biden's tax proposals aren't final, and his proposed capital gains increase may not go up that much.

Under President Joe Biden's proposed tax increases, the top 1% of Americans could soon see their tax bills grow by about $100,000 per year.

A new report from the Institute on Taxation and Economic Policy (ITEP) finds that only the highest-earning Americans would see their taxes change if President Biden's proposed increases to the income tax rate and capital gains rate pass. That change is concentrated amongst the top 1%, defined as those with an income over $681,600 (their average income is $2,167,700). The bottom 99% of taxpayers would see a 0% tax change, it said.

On average, the highest earners would see an increase of $104,130 in taxes, coming in at around 4.8% of their income. For those making between $276,200 to $681,600 - an average income of $404,100 - the average tax increase would be $20 a year.

Some states will be hit harder than others by tax increases

In a few states, a larger share of the population would feel the impact of proposed tax hikes. The report highlights that in five states - and the District of Columbia - a more than 1% share of the population would feel a hit.

Those are New Jersey, Massachusetts, Connecticut, California, and New York. In Massachusetts and New Jersey, 1.2% of the population would be affected by tax hikes. The wealthiest New York City residents will soon have the highest tax rate in the country regardless, per Insider's Hillary Hoffower.

Biden's proposals target the wealthy, but they're not final

Biden's latest tax proposals explicitly target the highest-earning Americans to offset the costs of multibillion-dollar investments in childcare, education, and paid leave. He's also proposed raising the corporate tax rate from 21% to 28% to offset investments in infrastructure like roads and bridges.

Beyond increases, the IRS could also get about $80 billion in funding to ramp up enforcement on the wealthiest taxpayers, as Biden is proposing. A recent study by IRS researchers and academics found that the top 1% of Americans may be hiding billions from the IRS; Biden's increased IRS funding could raise $700 billion over a decade, which would still leave the wealthy hiding hundreds of billions.

Of course, the package still has a long way to go before becoming law. A Morgan Stanley research note looked at Biden's proposals versus what they predict as possible, and said the corporate tax rate and rate on capital gains will ultimately come in lower. However, the income tax rate increase and IRS enforcement will likely be as Biden proposes.

"Look, I'm not out to punish anyone. But I will not add to the tax burden of the middle class of this country," Biden said in a Wednesday speech to the joint session of Congress.

He added: "When you hear someone say that they don't want to raise taxes on the wealthiest 1% and on corporate America - ask them: whose taxes are you going to raise instead, and whose are you going to cut?"