If you choose to pay on a monthly basis you'll pay a bit more by the end of the year, but you'll also have the ability to back out of your subscription at the end of any month. If you choose to pay on a yearly basis, you essentially get a discount that works out to two free months per year. Office 365, whether Personal, Home, or University, is a subscription-based service. Let's break down some of the major differences between Office products to help you decide which is best for you. If you'd rather buy once and stick with a set of apps and don't mind the lack of OneDrive storage and, in some cases, fewer apps, Office 2019 is likely a better choice. With a subscription to Office 365, you will pay more for years of service, but you do get quite a few more features, including OneDrive storage and Skype minutes.
While you'll get the core Office apps you love with either Office 365 or Office 2019, there are quite a few differences between the two options. Will not receive new apps when released.
