AWS Cost Explorer
Visual analysis and forecasting tool for your AWS cost and usage data.
Verified against AWS documentation · 2026-08-28
Key facts
- 01Views up to 13 months of historical cost and usage; forecasts up to 18 months ahead (monthly) or 3 months (daily)
- 02Filter and group by service, account, Region, tag, usage type — answers "what is costing me money and why"
- 03Includes Reserved Instance and Savings Plans recommendations, utilization, and coverage reports
- 04Console UI is free; the API and hourly granularity are the only paid parts
- 05Once enabled it can't be disabled; data refreshes at least once every 24 hours — it's analysis, not real-time monitoring
Exam triggers
Phrases and scenarios that point here.
- "Visualize", "analyze", "break down" past or current spend → Cost Explorer
- "Forecast" or "predict" future AWS costs → Cost Explorer
- "Which service/account/tag is driving the bill" → Cost Explorer with filters/grouping
- Historical spend trends over months → Cost Explorer, not the Billing dashboard
Not this service
- Alert me when spend crosses a threshold → AWS Budgets
- Most detailed line-item billing data for BI tools → Cost and Usage Report (Data Exports)
- Estimate costs *before* building anything → AWS Pricing Calculator
- Right-sizing compute based on performance metrics → AWS Compute Optimizer
Use cases
- 01Monday-morning bill shock triage: a $400 jump appeared on the invoice — group by service, then by usage type, and find the NAT Gateway data processing nobody noticed
- 02Chargeback by team: filter by cost allocation tags to show each squad exactly what their workloads cost last quarter
- 03Deciding whether Savings Plans are worth it: check the built-in recommendations and coverage reports before committing to 1- or 3-year terms
- 04Budget planning: use the 18-month forecast to give finance a defensible number instead of a guess
- 05Feeding a custom cost dashboard via the API when the console views aren't enough
How it's charged
- 01Console usage is completely free — this trips people up because the API is not
- 02API: $0.01 per paginated request — each page of results counts as a separate request, so a chatty script or third-party tool polling it can quietly rack up real money
- 03Hourly granularity (14-day lookback) is an opt-in paid add-on, billed per usage record hosted
- 04The classic billing surprise: an integration or cron job hammering the Cost Explorer API — you pay to look at what you're paying
