diff --git a/rowers/braintreestuff.py b/rowers/braintreestuff.py
index 92a10f28..b08dee2c 100644
--- a/rowers/braintreestuff.py
+++ b/rowers/braintreestuff.py
@@ -619,3 +619,19 @@ def get_transactions(start_date, end_date):  # pragma: no cover
 
 def mocktest(rower):  # pragma: no cover
     return '5'
+
+def cancel_braintree_subscriptions(gateway):
+    """
+    Cancel all Braintree subscriptions for Rowers, ensuring they run to the end of the current billing period.
+    """
+    rowers = Rower.objects.exclude(subscription_id__isnull=True)
+    for rower in rowers:
+        subscription_id = rower.subscription_id
+        try:
+            result = gateway.subscription.cancel(subscription_id)
+            if result.is_success:
+                print(f"✅ Subscription {subscription_id} for Rower {rower.id} will not renew.")
+            else:
+                print(f"❌ Failed to cancel subscription {subscription_id}: {result.message}")
+        except Exception as e:
+            print(f"🚨 Error processing subscription {subscription_id}: {e}")
diff --git a/rowers/tests/testdata/testdata.tcx.gz b/rowers/tests/testdata/testdata.tcx.gz
index 5cf0703c..a3ba1af5 100644
Binary files a/rowers/tests/testdata/testdata.tcx.gz and b/rowers/tests/testdata/testdata.tcx.gz differ