A report by the White House against the Amazon report details Donald Trump’s price impact on customers, calling it “hostile” political behavior.
Press Secretary Karoline Leavitt said she had discussed the move with the president and claimed it represents "another reason Americans should buy Americans."
Amazon has not confirmed plans to list tariff costs to U.S. consumers.
The bank is a sign of the growing trend facing the Trump administration in its new import tax, which economists warn that will lead to higher prices for consumers and increase opportunities for recession.
In a press conference marking the 100-day presidency, Treasury Secretary Scott Bessent defended the administration's economic record and committed to trade talks with many of the largest U.S. partners.
But he avoided questions about whether the United States will negotiate with China, the third largest source of imports since the EU and Mexico last year.
Trump has raised tariffs since re-entering the office in January, which he believes will boost manufacturing and increase U.S. tax revenue.
Even after re-forming his initial plan this month, his announcement left behind many foreign imports, facing a new duty of at least 10%, while products from China still faced an import tax of at least 145%.
These measures have prompted a sharp decline in trade between the two countries and have increased concerns about supply shocks and product shortages, with China being the main supplier, from strollers to umbrellas.
Amazon founder Jeff Bezos met with Trump after the election and praised him for pushing down and tax cuts.
Amazon is one of many businesses that donated to the president’s inauguration, and Mr. Bezos received honors at the event.
Amazon first reported on Tuesday that it detailed its plans to introduce the impact of customers’ tariffs and cited anonymous sources. The company has not responded to a request for comment from the BBC.
Press Secretary Karoline Leavitt declined to comment on the relationship between Trump and Bezos, but said she had spoken to Trump about the news.
"It's hostile and political behavior of Amazon," she said. "When the Biden administration rose to its highest level in 40 years, why didn't Amazon do that?"
Some businesses have begun to detail the cost of their customers’ measures, and Shein and Temu have already announced price increases in online platforms.
Analysts say businessmen from China represent about half of sellers on Amazon in the United States.
Reports contributed by Bernd Debussman