diff --git a/ProcessMaker/Http/Controllers/Api/UserController.php b/ProcessMaker/Http/Controllers/Api/UserController.php
index 34c3d6c758..070483b348 100644
--- a/ProcessMaker/Http/Controllers/Api/UserController.php
+++ b/ProcessMaker/Http/Controllers/Api/UserController.php
@@ -209,10 +209,14 @@ public function getUsersTaskCount(Request $request)
             $include_ids = explode(',', $include_ids_string);
         } elseif ($request->has('assignable_for_task_id')) {
             $task = ProcessRequestToken::findOrFail($request->input('assignable_for_task_id'));
-            if ($task->getAssignmentRule() === 'user_group') {
+            $assignmentRule = $task->getAssignmentRule();
+            if ($assignmentRule === 'user_group') {
                 // Limit the list of users to those that can be assigned to the task
                 $include_ids = $task->process->getAssignableUsers($task->element_id);
             }
+            if ($assignmentRule === 'rule_expression' && $request->has('form_data')) {
+                $include_ids = $task->getAssigneesFromExpression($request->input('form_data'));
+            }
         }
 
         if (!empty($include_ids)) {
diff --git a/ProcessMaker/Models/ProcessRequestToken.php b/ProcessMaker/Models/ProcessRequestToken.php
index 0f052e1819..c12e332b25 100644
--- a/ProcessMaker/Models/ProcessRequestToken.php
+++ b/ProcessMaker/Models/ProcessRequestToken.php
@@ -30,6 +30,7 @@
 use ProcessMaker\Traits\HasUuids;
 use ProcessMaker\Traits\HideSystemResources;
 use ProcessMaker\Traits\SerializeToIso8601;
+use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
 use Throwable;
 
 /**
@@ -968,6 +969,66 @@ public function getAssignmentRule()
         return $assignment;
     }
 
+    /**
+     * Get the assignees for the token.
+     *
+     * @param array $assignments
+     * @param array $variables
+     * @return array
+     */
+    public function getAssignees(array $assignments, array $variables): array
+    {
+        $result = [];
+        $language = new ExpressionLanguage();
+
+        foreach ($assignments as $assignment) {
+            $isTrue = false;
+
+            if (!empty($assignment['expression'])) {
+                try {
+                    $isTrue = $language->evaluate($assignment['expression'], $variables);
+                } catch (Throwable $e) {
+                    $isTrue = false;
+                }
+            }
+
+            if ($isTrue) {
+                $result[] = $assignment['assignee'];
+            }
+
+            if (isset($assignment['default']) && $assignment['default'] === true) {
+                $result[] = $assignment['assignee'];
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * Get the assignees from the expression
+     *
+     * @param string $form_data
+     * @return array
+     */
+    public function getAssigneesFromExpression(string $form_data): array
+    {
+        $formData = json_decode($form_data, true);
+
+        $activity = $this->getBpmnDefinition()->getBpmnElementInstance();
+        $assignmentRules = $activity->getProperty('assignmentRules', null);
+        $assignments = json_decode($assignmentRules, true);
+
+        $include_ids = $this->getAssignees($assignments, $formData);
+
+        // we add the manager to the list of assignees
+        $manager_id = $this->process->manager_id;
+        if ($manager_id) {
+            $include_ids[] = $manager_id;
+        }
+
+        return $include_ids;
+    }
+
     /**
      * Returns if the token has the self service option activated
      */
diff --git a/resources/js/common/reassignMixin.js b/resources/js/common/reassignMixin.js
index 5a9aef2fbe..fc4d2b9550 100644
--- a/resources/js/common/reassignMixin.js
+++ b/resources/js/common/reassignMixin.js
@@ -28,14 +28,18 @@ export default {
       }
       if (this.task?.id) {
         params.assignable_for_task_id = this.task.id;
+        // The variables are needed to calculate the rule expression.
+        if (this?.formData) {
+          params.form_data = this.formData;
+          delete params.form_data._user;
+          delete params.form_data._request;
+          delete params.form_data._process;
+        }
       }
 
       ProcessMaker.apiClient.get('users_task_count', { params }).then(response => {
         this.reassignUsers = [];
         response.data.data.forEach((user) => {
-          if (this.currentTaskUserId === user.id) {
-            return;
-          }
           this.reassignUsers.push({
             text: user.fullname,
             value: user.id,