It’s a lucrative classification. Four well-known organizations associated with white nationalism — the National Policy Institute, the New Century Foundation, the Charles Martel Society, and the VDare Foundation — have raised $7.8 million in tax-free donations over the last decade, according to a recent analysis by the Associated Press.

WASHINGTON — The US tax system contains a valuable benefit for prominent white nationalist groups, which for years have enjoyed a legal status that allows them to not pay levies and lets supporters write off their donations. This status also, for tax purposes, puts them in the same legal category as zoos, colleges, museums, orchestras, and planetariums.


Their tax status is getting renewed scrutiny after the 2016 election, in which white nationalists openly and widely championed then-candidate Donald Trump, raising their profile in US politics and adding overtly racist voices that were not part of the national dialogue in recent elections.

In a new proposal, legal expert Eric Franklin Amarante of the University of Nevada at Las Vegas is calling on the Internal Revenue Service to change the rules.

His proposal, which he published online, would force white nationalist groups to start paying taxes by removing the provision they rely on for their tax exemption, a broad rule that benefits organizations that sponsor lectures, conferences, and public discussions.

‘‘They get the assumption — the benefit of the doubt — that they are operating in the public’s interest, that this is a worthy organization,’’ Amarante said. ‘‘Is this really how we want to operate? Do we really want to give the federal government’s seal of approval, the imprimatur, to these organizations?’’

The white nationalist movement has its intellectual roots in an old tradition of justifying racial prejudice through appeals to nonscientific theories of human evolution. Some of the movement’s adherents generally espouse discredited ideas about race, arguing that there are important hereditary differences between races. Many also oppose racial integration and support a separate state for whites.


Recently, white nationalists have tried to distinguish themselves from white supremacists, an older term associated with terrorist groups such as the Ku Klux Klan.

White nationalists say they do not believe that whites are superior to people of other races or that they should have more power in society. (Peter Brimelow, who is in charge of the VDare Foundation, said the group’s website is not white nationalist, but that some writers who contribute to it could be described using that term, the Associated Press reported.)

Some white nationalists also make use of anti-Semitic themes, and supporters often give Nazi salutes.

But even organizations that condemn white nationalists’ messages are hesitant about proposals to take away their tax-exempt status. Indeed, major advocacy groups for charities and not-for-profit groups argue that as long as white nationalists do not advocate violence or get directly involved in politics — a prerequisite for their current status — they should be exempt from taxes.

The white nationalist groups qualify for tax-exempt status because they have successfully argued that they have an educational mission, and charity advocates are uncomfortable with an arrangement in which the IRS decides which groups qualify for that educational status based on their messages.

‘‘It is explicitly not the IRS’s job to make a political judgment on whether they like the content,’’ said Hadar Susskind of the Council on Foundations, a philanthropic coalition that defends legal protections for donors and charities. ‘‘If there’s a hate group that’s out there doing something bad, that’s an issue for the FBI, not the IRS.’’


Groups in this category that receive tax-deductible donations are known as 501(c)(3) organizations. You ‘‘don’t have to like all the people in the (c)(3) category to recognize that in our society we need all views expressed,’’ said David Thompson, a vice president at the National Council of Nonprofits, which advocates for charities. ‘‘We don’t make decisions on (c)(3) status based on whether we like their views or not.’’

Americans have been able to write off donations when they pay their taxes for a century, and the rule has become part of the country’s culture of charitable giving.

Americans donated an estimated $373 billion in 2015, according to Giving USA, a group based in Chicago that monitors charitable contributions.

About $10 billion of that total benefits educational organizations and their donors.