# Authentication operating cost worksheet

This is a planning template. Supply your own approved estimates and vendor quotes.

Evaluation date:
Currency and exchange-rate source, if needed:
Period in months:
Expected usage and definition:
Mandatory methods and controls:

| Cost item | Custom build | Self-hosted service | Managed provider | Basis and source date |
| --- | --- | --- | --- | --- |
| Initial engineering | | | | |
| Migration and rehearsal | | | | |
| Monthly licence | | | | |
| Monthly infrastructure | | | | |
| Monthly delivery charges | | | | |
| Monthly maintenance effort | | | | |
| Monthly support and on-call | | | | |
| Review and testing allowance | | | | |
| Exit and handover allowance | | | | |
| Taxes and variable charges | | | | |

Evaluation cost = setup + migration + period operations + exit allowance.
Period operations = months times the monthly licence, infrastructure, delivery,
maintenance and support costs.

Keep taxes and other allowances explicit. Avoid counting bundled fees twice.
Record assumptions rather than presenting estimated savings as measured results.