This move will increase the total tax rate for one of the US's key trading partners to 50%.
President Donald Trump has previously accused New Delhi of "supporting" the Ukrainian conflict through purchasing Russian oil, and said he would impose additional sanctions on the South Asian country over its defense and trade ties with Moscow, in addition to the 25% tariffs he imposed last week.
"I see that the Indian government is currently directly or indirectly importing oil from the Russian Federation," Trump said in an executive decree released by the White House on August 6.
According to the decree, this tax rate will take effect after 21 days from the date of announcement, that is, at the end of August.
The Indian Foreign Ministry has condemned the move, calling it "unfair, unfounded and unreasonable". India's trade with Russia is based on market factors and aims to ensure the country's energy security. New Delhi will take all necessary measures to protect its national interests, the Indian Foreign Ministry warned in a statement.
Last week, Mr. Trump criticized India's economic relations with Russia. He wrote in a post on Truth Social that "Moscow and New Delhi can together destroy their weak economy, I don't care", and said the US "does very little business with India".
He continued to describe the Asian country's tariffs on foreign goods as "too high". India is the 10th largest trading partner of the US.
In response to US threats of imposing secondary sanctions on Russian trade partners, including India, China and Brazil, Moscow said that "soviet states should have, and actually have, the right to choose their own trade partners," as well as decide which cooperation method best serves their national interests.
