diff --git a/app/serializers/api/line_item_serializer.rb b/app/serializers/api/line_item_serializer.rb
index 0f2196e083..5cbec9b5f9 100644
--- a/app/serializers/api/line_item_serializer.rb
+++ b/app/serializers/api/line_item_serializer.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class Api::LineItemSerializer < ActiveModel::Serializer
-  attributes :id, :quantity, :max_quantity, :price, :order_id
+  attributes :id, :quantity, :max_quantity, :price, :order_id, :tax_category_id
 
   has_one :variant, serializer: Api::VariantSerializer
 end
diff --git a/spec/controllers/api/v0/orders_controller_spec.rb b/spec/controllers/api/v0/orders_controller_spec.rb
index 92b0fccdb2..bf7d5ce527 100644
--- a/spec/controllers/api/v0/orders_controller_spec.rb
+++ b/spec/controllers/api/v0/orders_controller_spec.rb
@@ -258,6 +258,7 @@ module Api
           expect(json_response[:payments].first[:amount]).to eq order.payments.first.amount.to_s
           expect(json_response[:line_items].size).to eq order.line_items.size
           expect(json_response[:line_items].first[:variant][:product_name]).to eq order.line_items.first.variant.product.name
+          expect(json_response[:line_items].first[:tax_category_id]).to eq order.line_items.first.product.tax_category_id
         end
       end
     end