.png)
How It Works
When multiple AWS accounts are linked under AWS Organizations, AWS pools their usage and applies any Reserved Instance or Savings Plan discounts across the group. The resulting blended cost spreads those discounts evenly across all accounts in the family, producing a single averaged rate per resource type. This means an account that did not directly purchase a Reserved Instance may still show a lower effective rate because it is absorbing some of the discount from another account in the organization. The blended rate is a weighted average of all per-unit costs, both discounted and on-demand, for that resource family.
Why It Matters for Cloud Cost
Blended cost figures can obscure the true economics of individual accounts. A team reviewing their blended cost line may see a rate that looks discounted without understanding whether their account actually consumed any committed capacity, or whether it is simply receiving a fractional benefit from commitments owned elsewhere. This makes it difficult to accurately attribute costs to specific teams, projects, or business units. Finance teams relying on blended cost for chargebacks or showback reporting may under or overcharge internal stakeholders. Unblended cost, which shows the actual rate charged to each specific resource, is generally more useful for accurate cost allocation. Understanding the difference between the two is a prerequisite for reliable FinOps reporting.
Usage AI: Usage AI’s ClearCost layer surfaces unblended and fully loaded cost views across your AWS organization, giving finance and engineering teams accurate data for showback and chargeback reporting rather than averaged figures that mask true account-level spend.