Some CVS workers could soon be ringing up more than just customer purchases.

A judge has given the green light to a class-action suit that charges the drug-store chain with illegally denying its assistant managers overtime payments.

Manhattan federal Judge Paul Crotty cited court filings from employees who claim they’re misclassified as “executives” because they have no authority to hire or fire and routinely have to run cash registers, load and unload trucks, unpack merchandise and stock shelves at the chain’s 6,900 outlets.

“This ruling gives workers nationwide a chance to tell CVS: ‘Save the discounts for your customers, our wages are not on sale,’ ” plaintiffs’ lawyer Justin Swartz said.

A spokesman for CVS declined to comment on the ruling.