Disney FastPasses are 100% free. Yes, you heard that right, it is one of the very few things that Disney does not charge you any extra for!
With a regular Disney World Themepark ticket, you can reserve FastPasses for free up to 30 days out. If you’re staying on property at a Disney World Resort, this time is extended to 60 days out.
FastPasses can be reserved using the My Disney Experience app and are saved to your MagicBand.