Mont. Code Ann. § 25-10-103

Unless otherwise provided, in actions other than those mentioned in 25-10-101, costs may be allowed or not and, if allowed, may be apportioned between the parties on the same or adverse sides, in the discretion of the court, but no costs can be allowed in an action for the recovery of money or damages when the plaintiff fails to recover more than $50 or in an action to recover the possession of personal property when the value of the property is not more than $50.