diff --git a/Cargo.lock b/Cargo.lock
index 5847e137..8eaa8294 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -717,7 +717,7 @@ checksum = "955d28af4278de8121b7ebeb796b6a45735dc01436d898801014aced2773a3d6"
 
 [[package]]
 name = "sentry_protos"
-version = "0.27.0"
+version = "0.27.1"
 dependencies = [
  "prost",
  "prost-types",
diff --git a/proto/sentry_protos/billing/v1/services/contract/v1/endpoint_create_contract.proto b/proto/sentry_protos/billing/v1/services/contract/v1/endpoint_create_contract.proto
index 0bc0d05b..964242bc 100644
--- a/proto/sentry_protos/billing/v1/services/contract/v1/endpoint_create_contract.proto
+++ b/proto/sentry_protos/billing/v1/services/contract/v1/endpoint_create_contract.proto
@@ -16,6 +16,10 @@ message CreateContractRequest {
   // supported_month_intervals. If unset, defaults to the package's first
   // supported interval.
   uint32 month_interval = 6;
+  // The customer's tax registration number at invoicing time, persisted on the
+  // created invoice for receipts and reverse-charge determination. Unset if none
+  // is on file.
+  optional string tax_number = 7;
 }
 
 message CreateContractResponse {
diff --git a/proto/sentry_protos/billing/v1/services/contract/v1/endpoint_rollover_contract.proto b/proto/sentry_protos/billing/v1/services/contract/v1/endpoint_rollover_contract.proto
index fc4cdfd9..9e519e34 100644
--- a/proto/sentry_protos/billing/v1/services/contract/v1/endpoint_rollover_contract.proto
+++ b/proto/sentry_protos/billing/v1/services/contract/v1/endpoint_rollover_contract.proto
@@ -18,6 +18,10 @@ message RolloverContractRequest {
   // The pending change to apply to the new contract, if any. Unset means no
   // pending change is being applied during this rollover.
   optional sentry_protos.billing.v1.common.v1.PendingChange pending_change = 5;
+  // The customer's tax registration number at invoicing time, persisted on the
+  // created invoice for receipts and reverse-charge determination. Unset if none
+  // is on file.
+  optional string tax_number = 6;
 }
 
 message RolloverContractResponse {
diff --git a/proto/sentry_protos/billing/v1/services/contract/v1/invoice.proto b/proto/sentry_protos/billing/v1/services/contract/v1/invoice.proto
index 57757916..37b74eb5 100644
--- a/proto/sentry_protos/billing/v1/services/contract/v1/invoice.proto
+++ b/proto/sentry_protos/billing/v1/services/contract/v1/invoice.proto
@@ -29,4 +29,7 @@ message Invoice {
   string guid = 7;
   bool needs_charged = 8;
   sentry_protos.billing.v1.common.v1.Address address = 9;
+  // The customer's tax registration number as persisted at invoicing time.
+  // Unset if none was on file.
+  optional string tax_number = 10;
 }
diff --git a/rust/src/sentry_protos.billing.v1.services.contract.v1.rs b/rust/src/sentry_protos.billing.v1.services.contract.v1.rs
index 7742bb35..f065b7c3 100644
--- a/rust/src/sentry_protos.billing.v1.services.contract.v1.rs
+++ b/rust/src/sentry_protos.billing.v1.services.contract.v1.rs
@@ -401,6 +401,10 @@ pub struct Invoice {
     pub needs_charged: bool,
     #[prost(message, optional, tag = "9")]
     pub address: ::core::option::Option<super::super::super::common::v1::Address>,
+    /// The customer's tax registration number as persisted at invoicing time.
+    /// Unset if none was on file.
+    #[prost(string, optional, tag = "10")]
+    pub tax_number: ::core::option::Option<::prost::alloc::string::String>,
 }
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct OptionValue {
@@ -499,6 +503,11 @@ pub struct CreateContractRequest {
     /// supported interval.
     #[prost(uint32, tag = "6")]
     pub month_interval: u32,
+    /// The customer's tax registration number at invoicing time, persisted on the
+    /// created invoice for receipts and reverse-charge determination. Unset if none
+    /// is on file.
+    #[prost(string, optional, tag = "7")]
+    pub tax_number: ::core::option::Option<::prost::alloc::string::String>,
 }
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct CreateContractResponse {
@@ -691,6 +700,11 @@ pub struct RolloverContractRequest {
     pub pending_change: ::core::option::Option<
         super::super::super::common::v1::PendingChange,
     >,
+    /// The customer's tax registration number at invoicing time, persisted on the
+    /// created invoice for receipts and reverse-charge determination. Unset if none
+    /// is on file.
+    #[prost(string, optional, tag = "6")]
+    pub tax_number: ::core::option::Option<::prost::alloc::string::String>,
 }
 #[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct RolloverContractResponse {