Yes, you can buy through two main methods: a one-time purchase for lifetime use on a single device, or a recurring subscription that offers ongoing updates and multi-device access. One-Time Purchase (Perpetual License)

: You can purchase these directly from the Microsoft Store or authorized retailers like Amazon. Microsoft 365 Subscription

This is a service-based model where you pay monthly or annually.

If you don't want to purchase the full suite, there are several free ways to use Office tools: