Using the Cost Explorer chart - Amazon Cost Management
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Using the Cost Explorer chart

By default, you can view your costs at the chargeable rate as either a cash-based view with unblended costs or as an accrual-based view. In a cash-based view, your costs are recorded when cash is received or paid. In an accrual-based view, your costs are recorded when income is earned or costs are incurred. You can view data for up to the last 13 months, the current month, and forecast how much you're likely to spend for the next 12 months. You can also specify time ranges for the data and view time data by day or by month.

By default, Cost Explorer uses the Group by filter for the Daily unblended costs graph. When using the Group by filter, the Cost Explorer chart displays data for up to ten values in the Group by filter. If your data contains additional values, the chart displays nine bars or lines and then aggregates all remaining items in a tenth. The data table that's below the chart breaks out the data for individual services that are aggregated in the chart.

If your organization is onboarded to Billing Conductor, member accounts placed in billing groups automatically see your costs in Cost Explorer at the proforma rate configured in Billing Conductor. Member accounts can view costs and usage starting from when they joined their current billing group, and will lose access to the chargeable data for the period prior to joining their current billing group. If a backfill of proforma billing data is needed, submit a support ticket requesting a proforma backfill from the Billing Conductor team.

For more information about proforma rate configurations, see the Billing Conductor User Guide.