Your bill each month is pro-rata calculated per second for all billable items you used during the month. All Billing information can be seen (appropriate permissions needed) on your Organizations>Billing>Invoices page.
Each project is billed as follows:
1. The fee for the plan size multiplied by the portion of the month that the project was active. The quantity is calculated as the number of seconds the project was active, divided by the number of seconds in that calendar month.
For a full month, the quantity is 1.0000.
If you change the plan during the month, you will see separate line items for each portion of the month where the plan was different.
2. Extra user(s) are billed per additional user, for the portion of the month that the additional user was active. The quantity is calculated as the number of seconds the project was active, divided by the number of seconds in that calendar month and then multiplied by the number of users active for that portion of the month.
For an extra user who is active for the entire month, the quantity will be 1.0000.
If you have a change in the number of users during the month, you will see separate line items for each portion of the month where the number of users was different.
3. Extra storage is billed per 5GB per environment. The quantity is calculated as the number of seconds the project was active, divided by the number of seconds in that calendar month and then multiplied by the number of additional 5GB chunks allocated to that project.
4. Any applicable VAT will be added at the project level.
5. A project Subtotal will then be shown.
All the subtotals are added and displayed at the bottom of the invoice. The total VAT will be shown in a separate line.