diff --git a/crates/lib/artcraft_router/src/generate/generate_video/cost/artcraft/estimate_video_cost_artcraft_seedance2p0.rs b/crates/lib/artcraft_router/src/generate/generate_video/cost/artcraft/estimate_video_cost_artcraft_seedance2p0.rs
index 233351ea3d..2e258e596e 100644
--- a/crates/lib/artcraft_router/src/generate/generate_video/cost/artcraft/estimate_video_cost_artcraft_seedance2p0.rs
+++ b/crates/lib/artcraft_router/src/generate/generate_video/cost/artcraft/estimate_video_cost_artcraft_seedance2p0.rs
@@ -5,7 +5,7 @@ use seedance2pro::requests::generate_video::generate_video::{BatchCount, Generat
 use crate::generate::generate_video::plan::artcraft::plan_generate_video_artcraft_seedance2p0::PlanArtcraftSeedance2p0;
 use crate::generate::generate_video::video_generation_cost_estimate::VideoGenerationCostEstimate;
 
-pub fn estimate_video_cost_artcraft_seedance2p0(
+pub (crate) fn estimate_video_cost_artcraft_seedance2p0(
   plan: &PlanArtcraftSeedance2p0<'_>,
 ) -> VideoGenerationCostEstimate {
   let duration_seconds = plan.duration_seconds.unwrap_or(5).clamp(4, 15);
@@ -26,6 +26,8 @@ pub fn estimate_video_cost_artcraft_seedance2p0(
     resolution: Resolution::Square1x1,
     duration_seconds,
     batch_count,
+
+    // NB: These do not contribute to costs in the Seedance2 integration
     start_frame_url: None,
     end_frame_url: None,
     reference_image_urls: None,
@@ -42,3 +44,54 @@ pub fn estimate_video_cost_artcraft_seedance2p0(
     has_watermark: false,
   }
 }
+
+#[cfg(test)]
+mod tests {
+  use crate::api::common_video_model::CommonVideoModel;
+  use crate::api::provider::Provider;
+  use crate::client::request_mismatch_mitigation_strategy::RequestMismatchMitigationStrategy;
+  use crate::generate::generate_video::begin_video_generation::begin_video_generation;
+  use crate::generate::generate_video::generate_video_request::GenerateVideoRequest;
+
+  fn estimate_usd_cents(duration_seconds: u16, video_batch_count: u16) -> u64 {
+    let request = GenerateVideoRequest {
+      model: CommonVideoModel::Seedance2p0,
+      provider: Provider::Artcraft,
+      prompt: None,
+      start_frame: None,
+      end_frame: None,
+      reference_images: None,
+      resolution: None,
+      aspect_ratio: None,
+      duration_seconds: Some(duration_seconds),
+      video_batch_count: Some(video_batch_count),
+      request_mismatch_mitigation_strategy: RequestMismatchMitigationStrategy::ErrorOut,
+      idempotency_token: None,
+    };
+    begin_video_generation(&request)
+      .expect("begin_video_generation should succeed")
+      .estimate_costs()
+      .cost_in_usd_cents
+      .expect("cost_in_usd_cents should be present")
+  }
+
+  #[test]
+  fn test_estimate_cost_usd_cents() {
+    // Batch 1:
+    assert_eq!(estimate_usd_cents(4, 1), 64);
+    assert_eq!(estimate_usd_cents(5, 1), 80);
+    assert_eq!(estimate_usd_cents(6, 1), 96);
+    assert_eq!(estimate_usd_cents(7, 1), 112);
+    assert_eq!(estimate_usd_cents(15, 1), 240);
+
+    // Batch 2 = 2×
+    assert_eq!(estimate_usd_cents(4, 2), 128);
+    assert_eq!(estimate_usd_cents(5, 2), 160);
+    assert_eq!(estimate_usd_cents(15, 2), 480);
+
+    // Batch 4 = 3× (not 4×)
+    assert_eq!(estimate_usd_cents(4, 4), 192);
+    assert_eq!(estimate_usd_cents(5, 4), 240);
+    assert_eq!(estimate_usd_cents(15, 4), 720);
+  }
+}
diff --git a/crates/lib/artcraft_router/src/generate/generate_video/cost/mod.rs b/crates/lib/artcraft_router/src/generate/generate_video/cost/mod.rs
index e3a8f2a048..d7f9b4c4dd 100644
--- a/crates/lib/artcraft_router/src/generate/generate_video/cost/mod.rs
+++ b/crates/lib/artcraft_router/src/generate/generate_video/cost/mod.rs
@@ -1 +1 @@
-pub mod artcraft;
+pub (crate) mod artcraft;