Uses credits: animating a video tour clip, re-animating a clip, and running an Image Studio edit. The exact cost is always shown before you confirm.
Does not use credits: uploading and reordering photos, browsing Image Studio options, choosing your tour pacing, switching aspect ratios, setting up your opening and closing cards, choosing music, generating captions, generating Script Studio hooks/scripts/captions, and downloading or re-downloading finished content. Exporting is always free: once a video is generated or a photo edit is finalized, downloading it costs nothing in any format your plan includes, and Image Studio outputs download at the resolution you picked in the composer, 2K or 4K. See which export formats are included.
One exception worth knowing: changing a tour after it has finished rendering needs an Update Final Tour, and that costs a single credit. Editing the opening or closing card, swapping the music, re-pacing, or reordering, removing, or adding a scene all trigger it. Everything you set up before you generate is free.
Image Studio edits are charged only after they succeed, so a failed edit costs you nothing. Video tours are charged per scene as each scene is submitted, and if a scene fails its credits are held to cover one free retry rather than returned right away. If that retry also fails, or you leave the tour, the credits come back automatically. See how credits work when a job fails.