diff --git a/.changeset/silly-rooms-sleep.md b/.changeset/silly-rooms-sleep.md
new file mode 100644
index 00000000000..d217e19ef8d
--- /dev/null
+++ b/.changeset/silly-rooms-sleep.md
@@ -0,0 +1,5 @@
+---
+'@clerk/backend': minor
+---
+
+[Billing Beta] Update subscription item `plan` and `planId` properties to be `null`.
diff --git a/packages/backend/src/api/resources/CommerceSubscriptionItem.ts b/packages/backend/src/api/resources/CommerceSubscriptionItem.ts
index 081737fd033..38891fcf5a6 100644
--- a/packages/backend/src/api/resources/CommerceSubscriptionItem.ts
+++ b/packages/backend/src/api/resources/CommerceSubscriptionItem.ts
@@ -46,11 +46,11 @@ export class BillingSubscriptionItem {
     /**
      * The plan associated with this subscription item.
      */
-    readonly plan: BillingPlan,
+    readonly plan: BillingPlan | null,
     /**
      * The plan ID.
      */
-    readonly planId: string,
+    readonly planId: string | null,
     /**
      * Unix timestamp (milliseconds) of when the subscription item was created.
      */
@@ -112,8 +112,8 @@ export class BillingSubscriptionItem {
       data.period_start,
       data.next_payment,
       formatAmountJSON(data.amount),
-      BillingPlan.fromJSON(data.plan),
-      data.plan_id,
+      data.plan ? BillingPlan.fromJSON(data.plan) : null,
+      data.plan_id ?? null,
       data.created_at,
       data.updated_at,
       data.period_end,
diff --git a/packages/backend/src/api/resources/JSON.ts b/packages/backend/src/api/resources/JSON.ts
index 8bef448909c..dd28c67a1a3 100644
--- a/packages/backend/src/api/resources/JSON.ts
+++ b/packages/backend/src/api/resources/JSON.ts
@@ -880,8 +880,8 @@ export interface BillingSubscriptionItemJSON extends ClerkResourceJSON {
     date: number;
   } | null;
   amount: BillingMoneyAmountJSON | null;
-  plan: BillingPlanJSON;
-  plan_id: string;
+  plan?: BillingPlanJSON | null;
+  plan_id?: string | null;
 }
 
 /**
@@ -906,7 +906,7 @@ export interface BillingSubscriptionItemWebhookEventJSON extends ClerkResourceJS
   next_payment_amount: number;
   next_payment_date: number;
   amount: BillingMoneyAmountJSON;
-  plan: {
+  plan?: {
     id: string;
     instance_id: string;
     product_id: string;
@@ -922,8 +922,8 @@ export interface BillingSubscriptionItemWebhookEventJSON extends ClerkResourceJS
     currency: string;
     annual_monthly_amount: number;
     publicly_visible: boolean;
-  };
-  plan_id: string;
+  } | null;
+  plan_id?: string | null;
 }
 
 /**