diff --git a/Cargo.lock b/Cargo.lock
index 384958e3..17cd60f3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -717,7 +717,7 @@ checksum = "955d28af4278de8121b7ebeb796b6a45735dc01436d898801014aced2773a3d6"
 
 [[package]]
 name = "sentry_protos"
-version = "0.23.0"
+version = "0.24.0"
 dependencies = [
  "prost",
  "prost-types",
diff --git a/proto/sentry_protos/billing/v1/common/v1/line_item_details.proto b/proto/sentry_protos/billing/v1/common/v1/line_item_details.proto
index e97b0edf..1bfb7e6a 100644
--- a/proto/sentry_protos/billing/v1/common/v1/line_item_details.proto
+++ b/proto/sentry_protos/billing/v1/common/v1/line_item_details.proto
@@ -10,6 +10,9 @@ message LineItemDetails {
   // Unique identifier for the line item.
   string uid = 1;
 
+  // InvoiceItemType identifiers for this SKU, keyed by billing context.
+  InvoiceItemTypes invoice_item_types = 2;
+
   // Customer-facing display name for the line item.
   string customer_facing_name = 3;
 
@@ -22,3 +25,19 @@ message LineItemDetails {
   // Defines how usage data is transformed into this line item.
   BillableMetric billable_metric = 6;
 }
+
+// InvoiceItemType identifiers for a single SKU, split by billing context.
+// Reserved, on-demand, and activated usage of the same SKU can each settle as a
+// distinct InvoiceItemType, so every context carries its own identifier instead
+// of collapsing into one. Contexts are optional because some SKUs (e.g. Seer)
+// fold their usage irregularly and do not populate every context.
+message InvoiceItemTypes {
+  // Type for reserved (prepaid) usage of this SKU.
+  optional string reserved = 1;
+
+  // Type for on-demand (pay-as-you-go) usage of this SKU.
+  optional string ondemand = 2;
+
+  // Type for activated usage of this SKU.
+  optional string activated = 3;
+}
diff --git a/rust/src/sentry_protos.billing.v1.common.v1.rs b/rust/src/sentry_protos.billing.v1.common.v1.rs
index 0589afd1..f322ce69 100644
--- a/rust/src/sentry_protos.billing.v1.common.v1.rs
+++ b/rust/src/sentry_protos.billing.v1.common.v1.rs
@@ -224,6 +224,9 @@ pub struct LineItemDetails {
     /// Unique identifier for the line item.
     #[prost(string, tag = "1")]
     pub uid: ::prost::alloc::string::String,
+    /// InvoiceItemType identifiers for this SKU, keyed by billing context.
+    #[prost(message, optional, tag = "2")]
+    pub invoice_item_types: ::core::option::Option<InvoiceItemTypes>,
     /// Customer-facing display name for the line item.
     #[prost(string, tag = "3")]
     pub customer_facing_name: ::prost::alloc::string::String,
@@ -237,6 +240,23 @@ pub struct LineItemDetails {
     #[prost(message, optional, tag = "6")]
     pub billable_metric: ::core::option::Option<BillableMetric>,
 }
+/// InvoiceItemType identifiers for a single SKU, split by billing context.
+/// Reserved, on-demand, and activated usage of the same SKU can each settle as a
+/// distinct InvoiceItemType, so every context carries its own identifier instead
+/// of collapsing into one. Contexts are optional because some SKUs (e.g. Seer)
+/// fold their usage irregularly and do not populate every context.
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct InvoiceItemTypes {
+    /// Type for reserved (prepaid) usage of this SKU.
+    #[prost(string, optional, tag = "1")]
+    pub reserved: ::core::option::Option<::prost::alloc::string::String>,
+    /// Type for on-demand (pay-as-you-go) usage of this SKU.
+    #[prost(string, optional, tag = "2")]
+    pub ondemand: ::core::option::Option<::prost::alloc::string::String>,
+    /// Type for activated usage of this SKU.
+    #[prost(string, optional, tag = "3")]
+    pub activated: ::core::option::Option<::prost::alloc::string::String>,
+}
 /// Stripe-specific payment information for an organization.
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct StripePaymentData {