Office 2016 -- One-time purchase

The final choice is to buy just one copy of office 2010 professional plus product key outright, starting at $149.99 (119.99, AU$169). For that price, you get just Office 2016 for PC or Mac, with whatever features can be found as of September 22, 2015. Microsoft requires a snapshot of the software on that date and makes that version available to buy.

If Microsoft adds capabilities to Office down the road, the version you receive with a one-time purchase won't get them. You'll only get stability and security updates that be sure that your software keeps working as it ought to. Whenever a new version of Office arrives, you will need to pay to upgrade.

Additionally, when you purchase the software, it's yours to use for so long as you want. This is not the same as buy windows 10 , where should you cancel your subscription, the Office apps you downloaded together with your membership is only going to run inside a reduced functionality mode, which only lets you open and print files, not edit them or create brand new ones.