Understanding how Seedance 2.5 billing works helps you plan generations that fit your budget. This guide explains every factor that affects the final cost of a clip and how to keep spending predictable.
The first factor is resolution. Seedance 2.5 outputs at 480p, 720p and 1080p, and the per-second rate rises with resolution. 480p is the economical choice for drafts and social content; 720p is the all-round default; 1080p is reserved for final renders where detail matters.
The second factor is the audio switch. Native synchronized audio — dialogue, ambience and effects — is billed at a different per-second rate than silent clips. If you plan to add licensed music or recorded voiceover in post-production, generating without native audio is the cheaper route.
The third factor is duration. Clips run from 4 to 15 seconds and billing is strictly per second of output, so a 15-second clip costs roughly three times a 5-second clip at the same settings. Draft your idea at short duration first, then re-run the winning prompt longer.
Reference video deserves special attention: when your request includes reference videos, the input video duration is added to the billed duration on top of the output length. A 5-second output generated from a 10-second reference video is billed as 15 seconds of generation time. Keep reference clips tight — trim them to just the motion you need.
A practical workflow that saves money: prototype at 480p without audio and short duration, then generate the final version once at your target resolution with audio on. This two-pass approach typically cuts total spend dramatically compared with iterating at full settings.
The live cost estimate in the Seedance 2.5 generator updates as you change settings, so you always see the exact price before you click generate.