diff --git a/src/orb/types/invoice.py b/src/orb/types/invoice.py
index ba6ad026..18faacf7 100644
--- a/src/orb/types/invoice.py
+++ b/src/orb/types/invoice.py
@@ -33,6 +33,7 @@
     "LineItemTaxAmount",
     "Maximum",
     "Minimum",
+    "Plan",
     "ShippingAddress",
     "Subscription",
 ]
@@ -695,6 +696,19 @@ class Minimum(BaseModel):
     """Minimum amount applied"""
 
 
+class Plan(BaseModel):
+    id: Optional[str]
+
+    external_plan_id: Optional[str]
+    """
+    An optional user-defined ID for this plan resource, used throughout the system
+    as an alias for this Plan. Use this field to identify a plan by an existing
+    identifier in your system.
+    """
+
+    name: Optional[str]
+
+
 class ShippingAddress(BaseModel):
     city: Optional[str]
 
@@ -912,6 +926,12 @@ class Invoice(BaseModel):
     payment mechanisms (like bank transfers), where payment can take 3 days or more.
     """
 
+    plan: Optional[Plan]
+    """The active plan for this invoice's subscription on its invoice date.
+
+    This field is only populated for invoices generated by subscriptions.
+    """
+
     scheduled_issue_at: Optional[datetime]
     """
     If the invoice is in draft, this timestamp will reflect when the invoice is
diff --git a/src/orb/types/invoice_fetch_upcoming_response.py b/src/orb/types/invoice_fetch_upcoming_response.py
index 75a70e25..a532a752 100644
--- a/src/orb/types/invoice_fetch_upcoming_response.py
+++ b/src/orb/types/invoice_fetch_upcoming_response.py
@@ -33,6 +33,7 @@
     "LineItemTaxAmount",
     "Maximum",
     "Minimum",
+    "Plan",
     "ShippingAddress",
     "Subscription",
 ]
@@ -695,6 +696,19 @@ class Minimum(BaseModel):
     """Minimum amount applied"""
 
 
+class Plan(BaseModel):
+    id: Optional[str]
+
+    external_plan_id: Optional[str]
+    """
+    An optional user-defined ID for this plan resource, used throughout the system
+    as an alias for this Plan. Use this field to identify a plan by an existing
+    identifier in your system.
+    """
+
+    name: Optional[str]
+
+
 class ShippingAddress(BaseModel):
     city: Optional[str]
 
@@ -909,6 +923,12 @@ class InvoiceFetchUpcomingResponse(BaseModel):
     payment mechanisms (like bank transfers), where payment can take 3 days or more.
     """
 
+    plan: Optional[Plan]
+    """The active plan for this invoice's subscription on its invoice date.
+
+    This field is only populated for invoices generated by subscriptions.
+    """
+
     scheduled_issue_at: Optional[datetime]
     """
     If the invoice is in draft, this timestamp will reflect when the invoice is