Updated 2016-09-29: Revit 2016 and AutoCAD 2016 will be the last versions offered with Perpetual Licensing for Stand-Alone Desktop Software.
Autodesk Software Licensing for standalone desktop software will transition from perpetual licensing to desktop subscription licensing on February 1, 2016.
Perpetual Licensing for Autodesk Suites Licenses Will Remain Available After February 2016.
February 1, 2016, marks the end of “perpetual licenses for standalone desktop products,” clarified Andrew Anagnost, Autodesk Senior VP. “The suites [such as Building Design Suite, Product Design Suite, Entertainment Creation Suite] will continue to be available as standalone desktop products for some time, but that won’t last forever.”
Customers with perpetual licenses purchased prior to the cutoff date can continue to use their products with support from Autodesk. If these customers are on maintenance contract, Autodesk is expected to keep their perpetual desktop titles current with updates.
Robert Green's February 2015 article; How Will You Buy CAD Software in 2016? -- defines the terms of what licenses will be affected on February 1, 2016.
Defining License Terms and Costs
Perpetual License: A software license you own that runs with no time limits. A perpetual license for one seat of standalone AutoCAD 2015 is $4,195.
Maintenance Subscription: An annual maintenance contract that you can purchase with a perpetual license to keep the software up to date. Maintenance Subscription for AutoCAD is $545 per year.
Desktop Subscription: An annual or monthly rental contract that entitles you to run the latest version of the software. At the end of the rental period, if you don't renew, the software stops working. Desktop Subscription for AutoCAD is $1,680 per year or $210 per month. View Robert's complete article with sample cost structures.