TORONTO - An Ontario court judge deciding whether a class action lawsuit against Scotiabank (TSX:BNS) over unpaid overtime should be dismissed has reserved his decision.

Lawyer Louis Sokolov said that arguments wrapped up on Thursday.

A judge can reserve a decision for weeks or even months as they wade through the facts and arguments of a case. Justice George Strathy did not provide an estimated timeline for his decision.

Sokolov represents Cindy Fulawka, the lead plaintiff representing about 5,000 employees working as personal or senior bankers, financial advisers and account managers for small businesses at the bank's retail operations.

Fulawka, who has worked for the bank since 1986 but is currently on medical leave, claims the bank was loose with its record keeping when it came to extra work hours, resulting in employees working extra time they weren't being paid for.

None of the allegations have been proven in court.

Sokolov, told the court on Monday that Scotiabank has a duty to record and monitor all of the hours worked by its employees, and compensate them properly.

Robert Armstrong, a lawyer for Scotiabank, argued that a class action lawsuit over unpaid overtime should be dismissed because thousands of employees involved in the case have individual claims.

He told the judge that even if some employees do have legitimate claims for overtime, their experience varies, indicating that the issue isn't consistent across the major bank's operations.

Scotiabank has more than 69,000 employees and operations across Canada, Latin America and the Caribbean.