You can get Microsoft Office 2019 lifetime licenses for Windows or Mac on sale for $24.97 right now (reg. $229) through May 22. Both versions include Word, Excel, PowerPoint, Outlook, and OneNote; and the Home & Business edition for Mac also includes Teams. The Professional Plus version for Windows comes with Publisher and Access.
Hardware and software requirements are pretty straightforward: Macs need at least macOS Monterey, 4GB of RAM, and 10GB of free device space, while PCs need a minimum of Windows 10, 1GB of RAM, and 4GB of space. Licenses come from a trusted Microsoft partner.
You can get a Microsoft Office 2019 lifetime license for Windows or Mac on sale until May 22 at 11:59 p.m. PT, though prices may change at any time:
Lifetime license to Microsoft Office Professional Plus 2019 for Windows, $24.97 (reg. $229)
Lifetime license to Microsoft Office Home & Business 2019 for Mac, $24.97 (reg. $229)