diff --git a/learning_assistant/migrations/0009_learningassistantaudittrial.py b/learning_assistant/migrations/0009_learningassistantaudittrial.py
new file mode 100644
index 0000000..30068a2
--- /dev/null
+++ b/learning_assistant/migrations/0009_learningassistantaudittrial.py
@@ -0,0 +1,31 @@
+# Generated by Django 4.2.16 on 2024-11-14 13:55
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+import model_utils.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('learning_assistant', '0008_alter_learningassistantmessage_role'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='LearningAssistantAuditTrial',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('created', model_utils.fields.AutoCreatedField(default=django.utils.timezone.now, editable=False, verbose_name='created')),
+                ('modified', model_utils.fields.AutoLastModifiedField(default=django.utils.timezone.now, editable=False, verbose_name='modified')),
+                ('start_date', models.DateTimeField()),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL, unique=True)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]
diff --git a/learning_assistant/models.py b/learning_assistant/models.py
index 482bfe2..bd05ceb 100644
--- a/learning_assistant/models.py
+++ b/learning_assistant/models.py
@@ -47,3 +47,18 @@ class LearningAssistantMessage(TimeStampedModel):
     user = models.ForeignKey(USER_MODEL, db_index=True, on_delete=models.CASCADE)
     role = models.CharField(choices=Roles, max_length=64)
     content = models.TextField()
+
+
+class LearningAssistantAuditTrial(TimeStampedModel):
+    """
+    This model stores the trial period for an audit learner using the learning assistant.
+
+    A LearningAssistantAuditTrial instance will be created on a per user basis,
+    when an audit learner first sends a message using Xpert LA.
+
+    .. no_pii: This model has no PII.
+    """
+
+    # Unique constraint since each user should only have one trial
+    user = models.ForeignKey(USER_MODEL, db_index=True, on_delete=models.CASCADE, unique=True)
+    start_date = models.DateTimeField()