Short answer

A flat fee per tenant is a pricing model where a cloud or SaaS provider charges each customer (tenant) a fixed, predictable amount—regardless of usage volume, active users, or compute consumption. It simplifies budgeting and financial forecasting for buyers and reduces billing complexity for vendors.

TL;DR

Flat-fee pricing decouples cost from resource utilization, contrasting with usage-based or per-user models.

Common in mid-market SaaS deployments where predictability outweighs granular cost optimization.

Typically applies to infrastructure-as-a-service (IaaS) or platform-as-a-service (PaaS) offerings with bounded scope (e.g., defined API calls/month, storage cap, or named-user entitlements).

May include tiered flat fees (e.g., “Starter,” “Professional,” “Enterprise”) reflecting feature access—not raw capacity.

Requires clear contractual definition of “tenant” (e.g., legal entity, subsidiary, or logical isolation boundary) to prevent scope creep.

IBM Cloud and IBM Granite SaaS…