Americans are devoting a growing share of their paychecks to their cars, with auto debt climbing to a new high of $1.68 trillion at the end of 2025, according to a new analysis shared with CNBC. That's up 37% from late 2018, when outstanding auto loans and leases totaled $1.23 trillion, the Century Foundation and consumer advocacy group Protect Borrowers report. Nearly 86 million people—about one in four Americans—now carry auto debt. "People are seeing more and more of their paychecks eaten by their car payments," says Angela Hanks of the Century Foundation.