The Internal Revenue Service says it collected $482 million from wealthy tax cheats last year, in a continuing effort to step up their enforcement.

The IRS released their year-end progress report this month, saying they will continue to audit large corporations, high-income individuals, and complex partnerships who are not paying their fair share of U.S. taxes.

The agency says it pursued 1,600 millionaires to recoup the overdue tax payments and will not stop now.