Definition
SSO Tax refers to extra cost for single sign-on in SaaS plans. In SaaS procurement, this term can affect security approval, total cost, administrator workload, renewal timing, or the ability to switch vendors later.
Questions to ask vendors
- Is this capability included in the plan being quoted?
- Does it require an add-on, higher edition, or implementation service?
- Which team owns configuration and ongoing review?
- Can the vendor document how this works before contract signature?