Procurement Glossary

SSO Tax

SSO Tax means extra cost for single sign-on in SaaS plans. Learn why it matters when buying, renewing, or replacing business software.

Plain-English meaning

An informal buyer term for the higher plan or added charge sometimes required to obtain single sign-on or related identity controls.

Why it matters in a software decision

A security requirement can force a plan upgrade that changes the economic comparison between products.

Where you may see it

Plan comparison tables, enterprise quotes, identity integration documentation, and negotiation notes.

What to verify

  • Supported sso protocols
  • Minimum plan and quantity
  • Scim or lifecycle features
  • Support and configuration limits

Do not confuse it with

The phrase is market shorthand, not a formal fee category; the actual quote may bundle several enterprise capabilities.

Procurement example

Compare the required secure configuration, not the cheapest advertised plan, and document which upgrade is driven by identity needs.

This glossary explains procurement usage in plain English. Contract, privacy, security, accounting, and regulatory conclusions require context-specific review.