The IDA license doesn't expire: once it has been granted, provided the license is not revoked for non-payment, piracy or other licensing breaches, the software is yours to use for as long as you see fit. Your ability to get support and updates is limited in time and must eventually be renewed through support plans/upgrades. Your initial IDA license comes with a year of support and upgrades.
The End User Agreement for IDA can be found here.
A floating license can be installed on as many computers in your company as you want. The only limitation is the number of concurrent users: it should not exceed the number of purchased seats. To ensure this, floating licenses use a license manager. You or your admin will have to download and install it. Floating licenses are convenient for tracking the license use and more flexible than computer licenses.
Licensed to a specific machine, as many local users as one wants, provided only one of them uses the software at any given time.
Licensed to a specific individual. Assigned to single user, at most three computers by that single user: his laptop, and two desktop computers. The software can run max on one of these three computers at a time.
|Available to individuals||Yes||No||No|
|Available to companies||No9||Yes||Yes|
|Single license can be used by many different users||No 1||Yes 2||Yes 3|
|Single license can be installed on more than one machine||Yes 4||No||Yes 5|
|Tied to a specific end user||Yes 1||No 10||No 10|
|Several copies can be run simultaneously||Yes 6||Yes 6||Yes 6|
|Requires network connection||No||No||Yes 7|
|Locked to hardware||No||No||No 8|
|Support period||1 year||1 year||1 year|
|Requires a dongle||No||No||No|