It starts when the Free Tier is consumed.
If the project is not deleted, the billing ends after the last installment. Otherwise, the billing will end at the project deletion.
If the project exceeds the Free Tier, you will pay only for the transformed lines of code (not part of previous billed installments). The installments are canceled, and the billing is done once. Otherwise, no payment is required.
No.
See details here.
No. There is no additional charge for re-converting the same code multiple times within the same TC project.
Using Catch-up.
The project metrics (Transformable lines of code, number of installments…) will be updated accordingly.
If the files have already been transformed, nothing will happen. Otherwise, the total transformable lines will decrease and the project metrics will be updated accordingly.
No. See Pricing page.
No. See Pricing page.
Yes. All lines except empty ones for supported languages (see supported list).
There are badges in the Usage module that indicate the consumption of the Free Tier and Billable lines.
Yes, if the original files are overwritten using Catch-up. Only the newly added lines will be charged.
1 month per 1M modernizable LoC.
As much as you need based on you role.
Yes.
Yes.
No.
No.