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27/08/2026 8:35 am
TL;DR: The “SSO Tax” turns secure login into a licensing surcharge, with some SaaS plans forcing buyers into higher tiers or custom contracts to enable federated access, according to Unixi. The governance issue is that identity controls are being treated as monetised features, which distorts IAM decisions and encourages insecure workarounds.
NHIMG editorial — based on content published by Unixi: Single Sign-On (SSO) and the SSO Tax
By the numbers:
- Airtable’s Team plan does not support SSO, while the Business plan costs 125% more to add it.
- The average enterprise runs over 300 SaaS applications, which makes even small SSO premiums compound quickly.
Questions worth separating out
Q: How should security teams deal with SaaS vendors that charge extra for SSO?
A: Security teams should treat SSO as a baseline control requirement and measure vendors against it during procurement.
Q: Why does the SSO tax create IAM risk beyond the extra license cost?
A: Because it can delay federation, fragment authentication, and leave some applications on weaker local login paths.
Q: When should organisations pay for SSO and when should they walk away?
A: Organisations should pay when the application is strategically important, has meaningful user volume, or handles sensitive data that benefits from central authentication.
Practitioner guidance
- Inventory SaaS applications that gate SSO behind paid tiers Build a contract-level view of which applications support federated login only on higher plans, then rank them by user count, privileged access, and data sensitivity.
- Embed SSO availability into procurement and renewal criteria Require SSO support as a baseline control in SaaS evaluations, and make renewal decisions depend on whether the vendor includes it without forcing plan inflation.
- Prioritise shadow SaaS first where local credentials still exist Use discovery and access review workflows to surface unmanaged applications that remain outside federation, then target those apps for central identity coverage.
What's in the full article
Unixi's full article covers the pricing and product detail this post intentionally leaves for the source:
- Plan-by-plan examples of where SSO is withheld until organisations upgrade to higher tiers
- A breakdown of how the SSO tax compounds across large SaaS portfolios
- Details on the alternative authentication approach Unixi describes for broader SSO coverage
- The article's calculator for estimating potential savings across a SaaS stack
👉 Read Unixi's analysis of the SSO tax and SaaS identity pricing →
SSO tax and SaaS pricing: what IAM teams should rethink?
Explore further
27/08/2026 8:35 am
SSO pricing is now an identity governance issue, not just a procurement issue. When secure login is monetised as an upsell, the IAM programme no longer controls adoption purely through policy and architecture. Contract terms start deciding which applications participate in federation, which creates uneven security baselines across the SaaS estate. The practitioner takeaway is that SSO entitlement must be treated as part of control design, not an afterthought in commercial negotiations.
A few things that frame the scale:
- 92% of organisations expose NHIs to third parties, raising concerns about supply chain security, according to Ultimate Guide to NHIs.
- Only 5.7% of organisations have full visibility into their service accounts, which shows how quickly governance breaks down once access leaves the central identity boundary.
A question worth separating out:
Q: What should IAM and procurement teams compare before accepting a premium SSO tier?
A: They should compare the total licence uplift against the governance cost of not federating the app, including support overhead, access review complexity, and exposure from local accounts. That comparison makes the trade-off visible to both security and business stakeholders.
👉 Read our full editorial: The SSO tax shows how secure login gets priced as leverage
