How much does Weight Watchers Online cost? Weight Watchers® Online, our Internet-based offering for people who cannot attend Meetings, has two payment plan options: Monthly payment of C$22.99 plus a one-time sign up fee of C$34.99 for a first month total of C$57.98. Three months for C$86.49 (or a sign up fee of C$34.99 and three introductory months for C$51.50). If you choose either plan, we will automatically renew your subscription at the end of the prepayment period at our standard monthly rate of C$22.99 until you cancel.