FinOps Basics Cheat Sheet

Introduces FinOps principles, the crawl-walk-run maturity model, cost allocation via tagging, and key cost optimization levers.

1 PageBeginnerFeb 20, 2026

FinOps Core Principles

Foundational tenets of the FinOps Framework.

Teams need to collaborate- Engineering, finance, and business work together on cloud spend decisions
Decisions driven by business value- Cost trade-offs are evaluated against the value delivered, not cost alone
Everyone takes ownership- Engineers are accountable for the cost of what they build and run
FinOps data should be accessible and timely- Near real-time cost visibility, not month-old invoices
A centralized team drives FinOps- A dedicated function sets rate optimization and governance practices
Take advantage of the variable cost model- Cloud's pay-as-you-go nature enables continuous optimization, unlike fixed CapEx

Key Cost Optimization Levers

Common techniques to reduce cloud spend.

Rightsizing- Matching instance/resource size to actual observed utilization
Reserved Instances / Savings Plans- Commit to usage over 1-3 years for a significant discount vs on-demand
Spot Instances- Use spare capacity at steep discounts for fault-tolerant, interruptible workloads
Tagging / Cost Allocation- Tag resources by team/project/environment to attribute spend accurately
Idle Resource Cleanup- Identify and terminate unattached volumes, unused elastic IPs, idle load balancers

AWS Cost Explorer CLI Query

Retrieve daily cost grouped by service for the last 7 days.

bash

aws ce get-cost-and-usage \  --time-period Start=2026-07-01,End=2026-07-08 \  --granularity DAILY \  --metrics "UnblendedCost" \  --group-by Type=DIMENSION,Key=SERVICE

Pro Tip

Enforce mandatory cost-allocation tags (team, environment, project) at resource-creation time via IaC policy — retrofitting tags onto untagged legacy resources is far more expensive than preventing untagged spend up front.

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