Wasabi offers hot cloud storage that is easy to bundle as a partner storage solution. Various Wasabi MSPs manage end-customer data across several Wasabi buckets within one Wasabi account. This article describes how to compute charges based on bucket utilization. Refer to Bucket Size: Reviewing for instructions to download bucket utilization data.
If you anticipate many end customers leveraging Wasabi storage for data management, the method described in this article might become difficult to manage and prone to user error. Wasabi recommends implementing API automation to avoid such errors. Refer to Method 1 in Optimal Methods for MSP/CSP Partners to Manage Wasabi Accounts With WACM.
In the following CSV file for a bucket named 1tbwasabi-test, note two key columns to compute charges for this bucket:
BillableActiveStorage = 21704
BillableDeletedStorage = 1097563402033

The daily Wasabi rate is:
$6.99TB/month = $6.99/1024/30 = $0.00022754 unit price per GB per day
This example uses Wasabi's standard Pay-Go cloud storage pricing of $6.99/TB/month or $0.0068/GB/month. If you are on a different partner pricing plan, a different price would apply.
To calculate the Billable Active Storage charge, use this formula:
(((BillableActiveStorage/1024)/1024)/1024) * Daily Wasabi Rate
With a Billable Active Storage of 21704, the active storage charge is:
(21704/1024)/1024)/1024) = 0.00002021342516 * $0.00022754 = $0.00000000459936276078224
To calculate the Billable Deleted Storage charge, use this formula:
(((BillableDeletedStorage/1024)/1024)/1024) * Daily Wasabi Rate
With a Billable Deleted Storage of 21704, the active storage charge is:
(((1097563402033/1024)/1024)/1024) = 1022.185573385097086 * $0.00022754 = $0.232588
The Day 1 charge is:
BillableActiveStorage + BillableDeletedStorage
Once the Day 1 charge is calculated, repeat the same steps for each day of the month and aggregate the charges to create your monthly charge for this bucket. The following is an example of how to create this in Microsoft Excel:

Two new columns (“Daily active storage charges” and “Daily delete charges”) were added manually in the spreadsheet above (highlighted in green). The formulas above were used in these columns to compute charges for the day.
Wasabi also adds MinObjectSize charges (charges for accounts that have less than a total of 1 TB of data stored). MinObjectSize charges are not accounted for in the above description.