diff --git a/CHANGELOG.md b/CHANGELOG.md
index 67b1c0e..d0902c7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Added
+
+- `taskIsAdhoc` option to `OneBlinkUploader.uploadSubmission()`
+
 ## [7.0.0] - 2026-04-23
 
 ### Added
diff --git a/src/OneBlinkUploader.ts b/src/OneBlinkUploader.ts
index 2fed794..e967595 100644
--- a/src/OneBlinkUploader.ts
+++ b/src/OneBlinkUploader.ts
@@ -76,6 +76,7 @@ export default class OneBlinkUploader {
     taskActionId,
     taskGroupInstanceId,
     taskCompletionTimestamp,
+    taskIsAdhoc,
     formSubmissionDraftId,
     completionTimestamp,
     recaptchas = [],
@@ -130,6 +131,7 @@ export default class OneBlinkUploader {
         taskActionId,
         taskGroupInstanceId,
         taskCompletionTimestamp,
+        taskIsAdhoc,
         jobId,
         previousFormSubmissionApprovalId,
         recaptchas,
diff --git a/src/types.ts b/src/types.ts
index 2c35816..42ffeb9 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -61,6 +61,11 @@ export type UploadFormSubmissionOptions = UploadOptions & {
   taskGroupInstanceId?: string
   /** The date and time (in ISO format) the task was completed */
   taskCompletionTimestamp?: string
+  /**
+   * `true` if the task is being completed outside of its schedule or `false` if
+   * the task was scheduled to be completed
+   */
+  taskIsAdhoc?: boolean
 }
 
 export type UploadAssetOptions = UploadOptions & {