The IRS announced on Friday it is launching an effort to aggressively pursue 1,600 millionaires and 75 large business partnerships that owe hundreds of millions of dollars in past due taxes. IRS Commissioner Daniel Werfel said that with a boost in federal funding and the help of artificial intelligence tools, the agency has new means of targeting wealthy people who have “cut corners” on their taxes.

“If you pay your taxes on time, it should be particularly frustrating when you see that wealthy filers are not,” Werfel told reporters in a call previewing the announcement. He said 1,600 millionaires who owe at least $250,000 each in back taxes and 75 large business partnerships that have assets of roughly $10 billion on average are targeted for the new “compliance efforts.”

Werfel said a massive hiring effort and AI research tools developed by IRS employees and contractors are playing a big role in identifying wealthy tax dodgers. The agency is making an effort to showcase positive results from its burst of new funding under President Joe Biden’s Democratic administration as Republicans in Congress look to claw back some of that money.

“New tools are helping us see patterns and trends that we could not see before, and as a result, we have higher confidence on where to look and find where large partnerships are shielding income,” he said.