diff --git a/app/serializers/api/admin/enterprise_serializer.rb b/app/serializers/api/admin/enterprise_serializer.rb
index f189e57fd0..7c29b41e70 100644
--- a/app/serializers/api/admin/enterprise_serializer.rb
+++ b/app/serializers/api/admin/enterprise_serializer.rb
@@ -15,7 +15,7 @@ module Api
                  :terms_and_conditions_file_name, :terms_and_conditions_updated_at,
                  :preferred_invoice_order_by_supplier, :preferred_product_low_stock_display,
                  :visible, :hide_ofn_navigation, :white_label_logo,
-                 :white_label_logo_link
+                 :white_label_logo_link, :external_billing_id
 
       has_one :owner, serializer: Api::Admin::UserSerializer
       has_many :users, serializer: Api::Admin::UserSerializer
diff --git a/app/services/permitted_attributes/enterprise.rb b/app/services/permitted_attributes/enterprise.rb
index 234fadac77..1dd5b5a838 100644
--- a/app/services/permitted_attributes/enterprise.rb
+++ b/app/services/permitted_attributes/enterprise.rb
@@ -37,7 +37,7 @@ module PermittedAttributes
         :preferred_invoice_order_by_supplier,
         :preferred_product_low_stock_display,
         :hide_ofn_navigation, :white_label_logo, :white_label_logo_link,
-        :hide_groups_tab
+        :hide_groups_tab, :external_billing_id,
       ]
     end
   end
diff --git a/app/views/admin/enterprises/form/_primary_details.html.haml b/app/views/admin/enterprises/form/_primary_details.html.haml
index 04609e9b58..e5bbf4eed0 100644
--- a/app/views/admin/enterprises/form/_primary_details.html.haml
+++ b/app/views/admin/enterprises/form/_primary_details.html.haml
@@ -16,24 +16,8 @@
     %label= t('.primary_producer')
     = render partial: 'admin/shared/whats_this_tooltip', locals: {tooltip_text: t('.primary_producer_tip')}
   .five.columns.omega
-    = f.check_box :is_primary_producer, data: { action: "change->primary-details#primaryProducerChanged" } 
+    = f.check_box :is_primary_producer, data: { action: "change->primary-details#primaryProducerChanged" }
     = f.label :is_primary_producer, t('.producer')
-- if spree_current_user.admin?
-  .row
-    .three.columns.alpha
-      = f.label :sells, t('.sells')
-      = render partial: 'admin/shared/whats_this_tooltip', locals: {tooltip_text: t('.sells_tip')}
-    .two.columns
-      = f.radio_button :sells, "none", 'ng-model' => 'Enterprise.sells', data: {action: "change->primary-details#enterpriseSellsChanged"} 
-      = f.label :sells, t('.none'), value: "none"
-    .two.columns
-      = f.radio_button :sells, "own", 'ng-model' => 'Enterprise.sells', data: {action: "change->primary-details#enterpriseSellsChanged"}
-      = f.label :sells, t('.own'), value: "own"
-    .four.columns.omega
-      = f.radio_button :sells, "any", 'ng-model' => 'Enterprise.sells', data: {action: "change->primary-details#enterpriseSellsChanged"}
-      = f.label :sells, t('.any'), value: "any"
-      %span{ style: "width: 30px; height: 30px;", class: "hidden", data: { "primary-details-target": "spinner" } }
-        = render partial: "components/admin_spinner"
 .row
   .three.columns.alpha
     %label= t('.visible_in_search')
@@ -49,3 +33,29 @@
     = f.label :visible, t('.hidden'), value: 'hidden'
 
 = render partial: 'admin/enterprises/form/permalink'
+
+- if spree_current_user.admin?
+  .row
+    %fieldset.alpha.no-border-bottom
+      %legend= t('.admin_only_legend')
+    .row
+      .three.columns.alpha
+        = f.label :sells, t('.sells')
+        = render partial: 'admin/shared/whats_this_tooltip', locals: {tooltip_text: t('.sells_tip')}
+      .two.columns
+        = f.radio_button :sells, "none", 'ng-model' => 'Enterprise.sells', data: {action: "change->primary-details#enterpriseSellsChanged"}
+        = f.label :sells, t('.none'), value: "none"
+      .two.columns
+        = f.radio_button :sells, "own", 'ng-model' => 'Enterprise.sells', data: {action: "change->primary-details#enterpriseSellsChanged"}
+        = f.label :sells, t('.own'), value: "own"
+      .four.columns.omega
+        = f.radio_button :sells, "any", 'ng-model' => 'Enterprise.sells', data: {action: "change->primary-details#enterpriseSellsChanged"}
+        = f.label :sells, t('.any'), value: "any"
+        %span{ style: "width: 30px; height: 30px;", class: "hidden", data: { "primary-details-target": "spinner" } }
+          = render partial: "components/admin_spinner"
+    .row
+      .three.columns.alpha
+        = f.label :external_billing_id, t('.external_billing_id')
+        = render partial: 'admin/shared/whats_this_tooltip', locals: {tooltip_text: t('.external_billing_id_tip')}
+      .four.columns
+        = f.text_field :external_billing_id, { placeholder: t('.external_billing_id_placeholder') }
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 6c8fa2dbdc..a1a5bb33c7 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -1284,11 +1284,15 @@ en:
           own: Own
           sells: Sells
           sells_tip: "None - enterprise does not sell to customers directly.<br />Own - Enterprise sells own products to customers.<br />Any - Enterprise can sell own or other enterprises products.<br />"
+          external_billing_id: External Billing ID
+          external_billing_id_placeholder: eg. INV-2024-123456
+          external_billing_id_tip: "This is the ID used by the external billing system to identify this enterprise."
           visible_in_search: Visible in search?
           visible_in_search_tip: "Shops can be <br />1. publicly visible, appearing on the OFN map and listings. <br />2. Hidden on maps and listings but referenced by other shops and linked in their profile. <br />3. Completely hidden."
           visible: Public
           not_visible: Hidden
           hidden: Hide all references
+          admin_only_legend: Admin only
         properties:
           legend: "Properties"
         permalink:
@@ -3193,6 +3197,7 @@ See the %{link} to find out more about %{sitename}'s features and to start using
   report_header_hub_code: Hub Code
   report_header_hub_id: Hub ID
   report_header_hub_business_number: "Hub Business Number"
+  report_header_hub_external_billing_id: "Hub External Billing Id"
   report_header_hub_legal_name: "Hub Legal Name"
   report_header_hub_contact_name: "Hub Contact Name"
   report_header_hub_email: "Hub Public Email"
diff --git a/db/migrate/20241113185651_add_external_billing_id_on_enterprises.rb b/db/migrate/20241113185651_add_external_billing_id_on_enterprises.rb
new file mode 100644
index 0000000000..bd0292bbe3
--- /dev/null
+++ b/db/migrate/20241113185651_add_external_billing_id_on_enterprises.rb
@@ -0,0 +1,5 @@
+class AddExternalBillingIdOnEnterprises < ActiveRecord::Migration[7.0]
+  def change
+    add_column :enterprises, :external_billing_id, :string, limit: 128
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index be371a9499..37bab4a1e6 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2024_11_12_230401) do
+ActiveRecord::Schema[7.0].define(version: 2024_11_13_185651) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
   enable_extension "plpgsql"
@@ -229,6 +229,7 @@ ActiveRecord::Schema[7.0].define(version: 2024_11_12_230401) do
     t.boolean "hide_ofn_navigation", default: false, null: false
     t.text "white_label_logo_link"
     t.boolean "hide_groups_tab", default: false
+    t.string "external_billing_id", limit: 128
     t.index ["address_id"], name: "index_enterprises_on_address_id"
     t.index ["is_primary_producer", "sells"], name: "index_enterprises_on_is_primary_producer_and_sells"
     t.index ["name"], name: "index_enterprises_on_name", unique: true
diff --git a/lib/reporting/reports/revenues_by_hub/base.rb b/lib/reporting/reports/revenues_by_hub/base.rb
index e539c77fed..8b10386a6f 100644
--- a/lib/reporting/reports/revenues_by_hub/base.rb
+++ b/lib/reporting/reports/revenues_by_hub/base.rb
@@ -24,6 +24,7 @@ module Reporting
             hub: proc { |orders| distributor(orders).name },
             hub_id: proc { |orders| distributor(orders).id },
             hub_business_number: proc { |orders| distributor(orders).abn },
+            hub_external_billing_id: proc { |orders| distributor(orders).external_billing_id },
             hub_legal_name: proc { |orders| distributor(orders).business_address&.company },
             hub_contact_name: proc { |orders| distributor(orders).contact_name },
             hub_email: proc { |orders| distributor(orders).email_address },
diff --git a/spec/controllers/admin/enterprises_controller_spec.rb b/spec/controllers/admin/enterprises_controller_spec.rb
index 4caf3e38d7..415f75cc2a 100644
--- a/spec/controllers/admin/enterprises_controller_spec.rb
+++ b/spec/controllers/admin/enterprises_controller_spec.rb
@@ -409,6 +409,16 @@ RSpec.describe Admin::EnterprisesController, type: :controller do
         distributor.reload
         expect(distributor.users).to include user
       end
+
+      it "allows 'external_billing_id' to be changed" do
+        allow(controller).to receive_messages spree_current_user: admin_user
+        enterprise_params =
+          { id: profile_enterprise, enterprise: { external_billing_id: 'INV123456' } }
+
+        spree_put :update, enterprise_params
+        profile_enterprise.reload
+        expect(profile_enterprise.external_billing_id).to eq 'INV123456'
+      end
     end
 
     context "geocoding" do
diff --git a/spec/controllers/api/v0/enterprises_controller_spec.rb b/spec/controllers/api/v0/enterprises_controller_spec.rb
index d0529f3eeb..55fd6a2a15 100644
--- a/spec/controllers/api/v0/enterprises_controller_spec.rb
+++ b/spec/controllers/api/v0/enterprises_controller_spec.rb
@@ -7,6 +7,30 @@ RSpec.describe Api::V0::EnterprisesController, type: :controller do
 
   let(:enterprise) { create(:distributor_enterprise) }
 
+  context "as an admin user" do
+    let(:admin) { create(:admin_user) }
+    let!(:enterprise) { create(:distributor_enterprise) }
+
+    before do
+      allow(controller).to receive(:spree_current_user) { admin }
+    end
+
+    describe "updating an enterprise" do
+      let(:enterprise_params) do
+        {
+          external_billing_id: 'INV123456'
+        }
+      end
+
+      it "changes the external_billing_id field" do
+        api_put :update, id: enterprise.id, enterprise: enterprise_params
+        expect(response.status).to eq 200
+
+        expect(enterprise.reload.external_billing_id).to eq('INV123456')
+      end
+    end
+  end
+
   context "as an enterprise owner" do
     let(:enterprise_owner) { create(:user) }
     let!(:enterprise) { create(:distributor_enterprise, owner: enterprise_owner) }
diff --git a/spec/serializers/api/admin/enterprise_serializer_spec.rb b/spec/serializers/api/admin/enterprise_serializer_spec.rb
index 3f20145771..8483c2e27c 100644
--- a/spec/serializers/api/admin/enterprise_serializer_spec.rb
+++ b/spec/serializers/api/admin/enterprise_serializer_spec.rb
@@ -5,10 +5,11 @@ require "spec_helper"
 RSpec.describe Api::Admin::EnterpriseSerializer do
   include FileHelper
 
-  let(:enterprise) { create(:distributor_enterprise) }
+  let(:enterprise) { create(:distributor_enterprise, external_billing_id: 'INV123456') }
   it "serializes an enterprise" do
     serializer = Api::Admin::EnterpriseSerializer.new enterprise
     expect(serializer.to_json).to match enterprise.name
+    expect(serializer.as_json[:external_billing_id]).to eq('INV123456')
   end
 
   context "for logo" do
diff --git a/spec/system/admin/reports/revenues_by_hub_spec.rb b/spec/system/admin/reports/revenues_by_hub_spec.rb
index 079a94d2fa..9834fc55ba 100644
--- a/spec/system/admin/reports/revenues_by_hub_spec.rb
+++ b/spec/system/admin/reports/revenues_by_hub_spec.rb
@@ -37,9 +37,9 @@ RSpec.describe "Revenues By Hub Reports" do
       tax_rate_name: "Tax 1"
     )
   end
-  let(:distributor1) { create(:enterprise, name: "Hub 1", owner:) }
+  let(:distributor1) { create(:enterprise, name: "Hub 1", owner:, external_billing_id: 'INV1234') }
   let(:distributor2) { create(:enterprise, name: "Hub 2", owner:) }
-  let(:distributor3) { create(:enterprise, name: "Hub 3", owner:) }
+  let(:distributor3) { create(:enterprise, name: "Hub 3", owner:, external_billing_id: 'INV4321') }
   let(:owner) { create(:user, email: 'email@email.com') }
   let(:order_cycle) { create(:simple_order_cycle) }
   let(:product) { create(:product) }
@@ -64,6 +64,7 @@ RSpec.describe "Revenues By Hub Reports" do
         "Hub",
         "Hub ID",
         "Hub Business Number",
+        "Hub External Billing Id",
         "Hub Legal Name",
         "Hub Contact Name",
         "Hub Public Email",
@@ -86,6 +87,7 @@ RSpec.describe "Revenues By Hub Reports" do
         "Hub 1",
         order.distributor.id,
         "none",
+        "INV1234",
         "none",
         "none",
         "none",
@@ -110,6 +112,7 @@ RSpec.describe "Revenues By Hub Reports" do
         "none",
         "none",
         "none",
+        "none",
         "email@email.com",
         "none",
         "10 Lovely Street",
@@ -128,6 +131,7 @@ RSpec.describe "Revenues By Hub Reports" do
         "Hub 3",
         order_with_voucher_tax_excluded.distributor.id,
         "none",
+        "INV4321",
         "none",
         "none",
         "none",