AWS Cost and Usage Report (CUR)

Cloud Financial Management

The most detailed AWS billing dataset — line-item cost and usage data delivered to an S3 bucket you own.

Verified against AWS documentation · 2026-08-28

Key facts

  1. 01Delivers granular line items (per service, per resource, per hour if enabled) as files into your S3 bucket — it's raw data, not a dashboard
  2. 02Time granularity: hourly, daily, or monthly; optionally includes resource IDs for per-resource cost attribution
  3. 03Refreshed at least once a day; initial delivery can take up to 24 hours after setup
  4. 04Integrates with Athena (query with SQL), QuickSight (visualize), and Redshift (warehouse) — Parquet format is built for the Athena path
  5. 05Tracks Reserved Instance and Savings Plans utilization at the line-item level — the data source for serious commitment analysis

Exam triggers

Phrases and scenarios that point here.

  • "Most detailed" or "most granular" billing/cost data → CUR
  • "Analyze costs with SQL / Athena" or "custom cost dashboards in QuickSight" → CUR in S3
  • Cost data "delivered to S3" → CUR (Cost Explorer has no S3 delivery)
  • Chargeback / showback per team, per resource, or per tag → CUR with resource IDs and cost allocation tags

Not this service

  • Visual point-and-click cost exploration and forecasts → Cost Explorer
  • Alerts when spend crosses a threshold → AWS Budgets
  • Cost optimization recommendations → Trusted Advisor / Compute Optimizer
  • Splitting bills across business units → AWS Billing Conductor

Use cases

  1. 01Feeding a FinOps pipeline: CUR lands in S3, Athena queries it, QuickSight dashboards it — the standard homegrown cost analytics stack
  2. 02Chargeback: tagging resources by team, then using CUR line items to bill each department for exactly what they consumed
  3. 03Auditing a surprise bill — CUR is where you find *which* resource, in *which* hour, generated the charge Cost Explorer only shows as a spike
  4. 04Verifying RI and Savings Plans coverage before renewing commitments, using actual utilization line items instead of estimates

How it's charged

  1. 01The report itself is free — no charge to enable or generate it
  2. 02You pay for what surrounds it: S3 storage for the report files, and Athena/QuickSight/Redshift costs if you query or visualize the data
  3. 03Enabling resource IDs or hourly granularity multiplies file size — meaning more S3 storage and more Athena data scanned per query

Commonly confused with

AWS Cost ExplorerCloud Financial ManagementAWS BudgetsCloud Financial ManagementAWS Trusted AdvisorManagement & Governance

References