Why is the OnPrem Service Plan more expensive than the SaaS (Cloud-based) ones?

Our prices are based on our customers expectations for our presence. Our experience with OnPrem (Self-hosted) solutions is that they require much more presence and support from our consultancy staff than the SaaS solutions. Self-hosted solutions will always experience challenges with local network infrastructure, database, certificate servers and other backend services. All these needed services are on place with the SaaS based service and will not need installations and setup from your internal IT-department.