Action News has confirmed with sources that Perzel is scheduled to change his plea from innocent to guilty at a hearing in Harrisburg on Wednesday.
Prosecutors have described the Philadelphia Republican as the architect of a scheme to illegally use millions of dollars' worth of taxpayer-financed computer technology to gain an edge in political campaigns.
The 61-year-old Perzel faces 82 counts that include theft, conspiracy and conflict of interest.
Eric Ruth, a former House GOP technology office employee, is also scheduled to plead guilty. Ruth's lawyer says his pleas will be to conspiracy and conflict of interest.