Cost and Free Tier

# Current month estimated charges
aws ce get-cost-and-usage \
  --time-period Start=$(date -u +%Y-%m-01),End=$(date -u +%Y-%m-%d) \
  --granularity MONTHLY \
  --metrics BlendedCost \
  --query 'ResultsByTime[0].Total.BlendedCost'

# By service (last 30 days)
aws ce get-cost-and-usage \
  --time-period Start=$(date -u -d '-30 days' +%Y-%m-%d),End=$(date -u +%Y-%m-%d) \
  --granularity MONTHLY \
  --metrics BlendedCost \
  --group-by Type=DIMENSION,Key=SERVICE \
  --query 'ResultsByTime[0].Groups[*].[Keys[0],Metrics.BlendedCost.Amount]' \
  --output table

# Forecast next month cost
aws ce get-cost-forecast \
  --time-period Start=$(date -u +%Y-%m-%d),End=$(date -u +%Y-%m-01 -d 'next month') \
  --granularity MONTHLY \
  --metric BLENDED_COST

# View Savings Plans recommendations
aws savingsplans describe-savings-plans-purchase-recommendation \
  --savings-plans-type COMPUTE_SP \
  --term-in-years ONE_YEAR \
  --payment-option NO_UPFRONT \
  --lookback-period-in-days THIRTY_DAYS

# Enable billing alerts (once per account, us-east-1)
aws cloudwatch put-metric-alarm \
  --alarm-name billing-alert-50 \
  --alarm-description "Estimated charges > $50" \
  --namespace AWS/Billing \
  --metric-name EstimatedCharges \
  --dimensions Name=Currency,Value=USD \
  --statistic Maximum \
  --period 86400 \
  --threshold 50 \
  --comparison-operator GreaterThanOrEqualToThreshold \
  --evaluation-periods 1 \
  --alarm-actions arn:aws:sns:us-east-1:123:billing-alerts \
  --region us-east-1

# Create a $100/mo cost budget with 80% + 100% alerts
aws budgets create-budget \
  --account-id 123456789012 \
  --budget '{
    "BudgetName": "monthly-100",
    "BudgetLimit": {"Amount":"100","Unit":"USD"},
    "TimeUnit": "MONTHLY",
    "BudgetType": "COST"
  }' \
  --notifications-with-subscribers '[
    {
      "Notification": {
        "NotificationType":"ACTUAL",
        "ComparisonOperator":"GREATER_THAN",
        "Threshold":80,
        "ThresholdType":"PERCENTAGE"
      },
      "Subscribers":[{"SubscriptionType":"EMAIL","Address":"you@example.com"}]
    },
    {
      "Notification": {
        "NotificationType":"FORECASTED",
        "ComparisonOperator":"GREATER_THAN",
        "Threshold":100,
        "ThresholdType":"PERCENTAGE"
      },
      "Subscribers":[{"SubscriptionType":"EMAIL","Address":"you@example.com"}]
    }
  ]'

aws budgets describe-budgets --account-id 123456789012

# Activate user-defined tag for cost tracking
aws ce update-cost-allocation-tags-status \
  --cost-allocation-tags-status TagKey=Project,Status=Active \
                                TagKey=Env,Status=Active

# Check which tags are active
aws ce list-cost-allocation-tags --status Active

# Enable Compute Optimizer for the account
aws compute-optimizer update-enrollment-status \
  --status Active \
  --include-member-accounts

# Get EC2 rightsizing recommendations
aws compute-optimizer get-ec2-instance-recommendations \
  --query 'instanceRecommendations[*].[instanceArn,finding,recommendationOptions[0].instanceType]' \
  --output table

# Lambda rightsizing
aws compute-optimizer get-lambda-function-recommendations \
  --query 'lambdaFunctionRecommendations[*].[functionArn,finding,memorySizeRecommendationOptions[0].memorySize]' \
  --output table

# List cost-related checks (requires Business/Enterprise support)
aws support describe-trusted-advisor-checks --language en \
  --query 'checks[?category==`cost_optimizing`].[id,name]' \
  --output table

# Get results for a specific check
aws support describe-trusted-advisor-check-result \
  --check-id Qch7DwouX1   # Low Utilization Amazon EC2 Instances