Savings Plan amortized cost converts a front-loaded or recurring Savings Plan fee into a daily rate you can actually reason about. The default unblended view shows what AWS billed your account each day so a 1-year All Upfront Savings Plan appears as a single large charge on Day 1, then silence for 364 days. Accurate for cash flow. Operationally useless for tracking commitment ROI, allocating costs to teams, or detecting underutilization.
Here's what amortized cost is technically, how it differs from unblended and blended, and critically how to use it to catch unused commitment before it compounds.
What Is Savings Plan Amortized Cost?
Amortized cost is a cost dataset in AWS Cost Explorer and the Cost and Usage Report (CUR) that spreads Savings Plan fees uniformly across each day of the commitment term. It's an accrual accounting view of your cloud spend.
The formula AWS applies:
