diff --git a/app/models/form/sales/pages/person_sex_registered_at_birth.rb b/app/models/form/sales/pages/person_sex_registered_at_birth.rb
new file mode 100644
index 000000000..d77e8d98d
--- /dev/null
+++ b/app/models/form/sales/pages/person_sex_registered_at_birth.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class Form::Sales::Pages::PersonSexRegisteredAtBirth < ::Form::Page
+  def initialize(id, hsh, subsection, person_index:)
+    super(id, hsh, subsection)
+    @copy_key = "sales.household_characteristics.sex2.person" if person_index == 2
+    @person_index = person_index
+    @depends_on = [
+      { "details_known_#{person_index}" => 1 },
+    ]
+  end
+
+  def questions
+    @questions ||= [
+      Form::Sales::Questions::PersonSexRegisteredAtBirth.new("sexRAB#{@person_index}", nil, self, person_index:@person_index),
+    ]
+  end
+end
diff --git a/app/models/form/sales/pages/sex_registered_at_birth2.rb b/app/models/form/sales/pages/sex_registered_at_birth2.rb
new file mode 100644
index 000000000..55031b92a
--- /dev/null
+++ b/app/models/form/sales/pages/sex_registered_at_birth2.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class Form::Sales::Pages::SexRegisteredAtBirth2 < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @id = "buyer_2_sex_registered_at_birth"
+    @copy_key = "sales.household_characteristics.sex2.buyer"
+    @depends_on = [
+      {
+        "joint_purchase?" => true,
+        "buyer_has_seen_privacy_notice?" => true,
+      },
+      {
+        "joint_purchase?" => true,
+        "buyer_not_interviewed?" => true,
+      },
+    ]
+  end
+
+  def questions
+    @questions ||= [
+      Form::Sales::Questions::SexRegisteredAtBirth2.new(nil, nil, self),
+    ]
+  end
+end
diff --git a/app/models/form/sales/questions/person_sex_registered_at_birth.rb b/app/models/form/sales/questions/person_sex_registered_at_birth.rb
new file mode 100644
index 000000000..fe1f14fa0
--- /dev/null
+++ b/app/models/form/sales/questions/person_sex_registered_at_birth.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class Form::Sales::Questions::PersonSexRegisteredAtBirth < ::Form::Question
+  def initialize(id, hsh, page, person_index:)
+    super(id, hsh, page)
+    @type = "radio"
+    @copy_key = "sales.household_characteristics.sexRAB2.person" if person_index == 2
+    @check_answers_card_number = person_index
+    @inferred_check_answers_value = [{
+      "condition" => {
+        id => "R",
+      },
+      "value" => "Prefers not to say",
+    }]
+    @answer_options = ANSWER_OPTIONS
+    @question_number = QUESTION_NUMBER_FROM_YEAR[form.start_date.year] || QUESTION_NUMBER_FROM_YEAR[QUESTION_NUMBER_FROM_YEAR.keys.max]
+  end
+
+  ANSWER_OPTIONS = {
+    "F" => { "value" => "Female" },
+    "M" => { "value" => "Male" },
+    "divider" => { "value" => true },
+    "R" => { "value" => "Person prefers not to say" },
+  }.freeze
+
+  QUESTION_NUMBER_FROM_YEAR = { 2026 => 0 }.freeze
+end
diff --git a/app/models/form/sales/questions/sex_registered_at_birth1.rb b/app/models/form/sales/questions/sex_registered_at_birth1.rb
index 633a9dc13..f6b219d74 100644
--- a/app/models/form/sales/questions/sex_registered_at_birth1.rb
+++ b/app/models/form/sales/questions/sex_registered_at_birth1.rb
@@ -14,8 +14,8 @@ class Form::Sales::Questions::SexRegisteredAtBirth1 < ::Form::Question
     "F" => { "value" => "Female" },
     "M" => { "value" => "Male" },
     "divider" => { "value" => true },
-    "R" => { "value" => "Tenant prefers not to say" },
+    "R" => { "value" => "Buyer prefers not to say" },
   }.freeze
 
-  QUESTION_NUMBER_FROM_YEAR = { 2026 => 32 }.freeze
+  QUESTION_NUMBER_FROM_YEAR = { 2026 => 0 }.freeze
 end
diff --git a/app/models/form/sales/questions/sex_registered_at_birth2.rb b/app/models/form/sales/questions/sex_registered_at_birth2.rb
new file mode 100644
index 000000000..073be25a2
--- /dev/null
+++ b/app/models/form/sales/questions/sex_registered_at_birth2.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+class Form::Sales::Questions::SexRegisteredAtBirth2 < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "sexRAB2"
+    @type = "radio"
+    @copy_key = "sales.household_characteristics.sexRAB2.buyer"
+    @check_answers_card_number = 2
+    @inferred_check_answers_value = [{
+      "condition" => {
+        "sex2" => "R",
+      },
+      "value" => "Prefers not to say",
+    }]
+    @answer_options = ANSWER_OPTIONS
+    @question_number = QUESTION_NUMBER_FROM_YEAR[form.start_date.year] || QUESTION_NUMBER_FROM_YEAR[QUESTION_NUMBER_FROM_YEAR.keys.max]
+  end
+
+  ANSWER_OPTIONS = {
+    "F" => { "value" => "Female" },
+    "M" => { "value" => "Male" },
+    "divider" => { "value" => true },
+    "R" => { "value" => "Buyer prefers not to say" },
+  }.freeze
+
+  QUESTION_NUMBER_FROM_YEAR = { 2026 => 0 }.freeze
+end
diff --git a/app/models/form/sales/subsections/household_characteristics.rb b/app/models/form/sales/subsections/household_characteristics.rb
index b18f7919f..4542ad49d 100644
--- a/app/models/form/sales/subsections/household_characteristics.rb
+++ b/app/models/form/sales/subsections/household_characteristics.rb
@@ -47,6 +47,7 @@ class Form::Sales::Subsections::HouseholdCharacteristics < ::Form::Subsection
       Form::Sales::Pages::RetirementValueCheck.new("age_2_buyer_retirement_value_check", nil, self, person_index: 2),
       (Form::Sales::Pages::NotRetiredValueCheck.new("age_2_buyer_not_retired_value_check", nil, self, person_index: 2) if form.start_year_2024_or_later?),
       (Form::Sales::Pages::PersonStudentNotChildValueCheck.new("buyer_2_age_student_not_child_value_check", nil, self, person_index: 2) unless form.start_year_2025_or_later?),
+      Form::Sales::Pages::SexRegisteredAtBirth2.new(nil, nil, self),
       Form::Sales::Pages::GenderIdentity2.new(nil, nil, self),
       buyer_2_ethnicity_nationality_pages,
       Form::Sales::Pages::Buyer2WorkingSituation.new(nil, nil, self),
@@ -68,6 +69,7 @@ class Form::Sales::Subsections::HouseholdCharacteristics < ::Form::Subsection
       (Form::Sales::Pages::NotRetiredValueCheck.new("age_2_not_retired_value_check", nil, self, person_index: 2) if form.start_year_2024_or_later?),
       (Form::Sales::Pages::PersonStudentNotChildValueCheck.new("age_2_student_not_child_value_check", nil, self, person_index: 2) unless form.start_year_2025_or_later?),
       (Form::Sales::Pages::PartnerUnder16ValueCheck.new("age_2_partner_under_16_value_check", nil, self, person_index: 2) if form.start_year_2024_or_later?),
+      Form::Sales::Pages::PersonSexRegisteredAtBirth.new("person_2_sex_registered_at_birth", nil, self, person_index: 2),
       Form::Sales::Pages::PersonGenderIdentity.new("person_2_gender_identity", nil, self, person_index: 2),
       Form::Sales::Pages::PersonWorkingSituation.new("person_2_working_situation", nil, self, person_index: 2),
       Form::Sales::Pages::RetirementValueCheck.new("working_situation_2_retirement_value_check", nil, self, person_index: 2),
@@ -83,6 +85,7 @@ class Form::Sales::Subsections::HouseholdCharacteristics < ::Form::Subsection
       (Form::Sales::Pages::NotRetiredValueCheck.new("age_3_not_retired_value_check", nil, self, person_index: 3) if form.start_year_2024_or_later?),
       (Form::Sales::Pages::PersonStudentNotChildValueCheck.new("age_3_student_not_child_value_check", nil, self, person_index: 3) unless form.start_year_2025_or_later?),
       (Form::Sales::Pages::PartnerUnder16ValueCheck.new("age_3_partner_under_16_value_check", nil, self, person_index: 3) if form.start_year_2024_or_later?),
+      Form::Sales::Pages::PersonSexRegisteredAtBirth.new("person_3_sex_registered_at_birth", nil, self, person_index: 3),
       Form::Sales::Pages::PersonGenderIdentity.new("person_3_gender_identity", nil, self, person_index: 3),
       Form::Sales::Pages::PersonWorkingSituation.new("person_3_working_situation", nil, self, person_index: 3),
       Form::Sales::Pages::RetirementValueCheck.new("working_situation_3_retirement_value_check", nil, self, person_index: 3),
@@ -98,6 +101,7 @@ class Form::Sales::Subsections::HouseholdCharacteristics < ::Form::Subsection
       (Form::Sales::Pages::NotRetiredValueCheck.new("age_4_not_retired_value_check", nil, self, person_index: 4) if form.start_year_2024_or_later?),
       (Form::Sales::Pages::PersonStudentNotChildValueCheck.new("age_4_student_not_child_value_check", nil, self, person_index: 4) unless form.start_year_2025_or_later?),
       (Form::Sales::Pages::PartnerUnder16ValueCheck.new("age_4_partner_under_16_value_check", nil, self, person_index: 4) if form.start_year_2024_or_later?),
+      Form::Sales::Pages::PersonSexRegisteredAtBirth.new("person_4_sex_registered_at_birth", nil, self, person_index: 4),
       Form::Sales::Pages::PersonGenderIdentity.new("person_4_gender_identity", nil, self, person_index: 4),
       Form::Sales::Pages::PersonWorkingSituation.new("person_4_working_situation", nil, self, person_index: 4),
       Form::Sales::Pages::RetirementValueCheck.new("working_situation_4_retirement_value_check", nil, self, person_index: 4),
@@ -113,6 +117,7 @@ class Form::Sales::Subsections::HouseholdCharacteristics < ::Form::Subsection
       (Form::Sales::Pages::NotRetiredValueCheck.new("age_5_not_retired_value_check", nil, self, person_index: 5) if form.start_year_2024_or_later?),
       (Form::Sales::Pages::PersonStudentNotChildValueCheck.new("age_5_student_not_child_value_check", nil, self, person_index: 5) unless form.start_year_2025_or_later?),
       (Form::Sales::Pages::PartnerUnder16ValueCheck.new("age_5_partner_under_16_value_check", nil, self, person_index: 5) if form.start_year_2024_or_later?),
+      Form::Sales::Pages::PersonSexRegisteredAtBirth.new("person_5_sex_registered_at_birth", nil, self, person_index: 5),
       Form::Sales::Pages::PersonGenderIdentity.new("person_5_gender_identity", nil, self, person_index: 5),
       Form::Sales::Pages::PersonWorkingSituation.new("person_5_working_situation", nil, self, person_index: 5),
       Form::Sales::Pages::RetirementValueCheck.new("working_situation_5_retirement_value_check", nil, self, person_index: 5),
@@ -128,6 +133,7 @@ class Form::Sales::Subsections::HouseholdCharacteristics < ::Form::Subsection
       (Form::Sales::Pages::NotRetiredValueCheck.new("age_6_not_retired_value_check", nil, self, person_index: 6) if form.start_year_2024_or_later?),
       (Form::Sales::Pages::PersonStudentNotChildValueCheck.new("age_6_student_not_child_value_check", nil, self, person_index: 6) unless form.start_year_2025_or_later?),
       (Form::Sales::Pages::PartnerUnder16ValueCheck.new("age_6_partner_under_16_value_check", nil, self, person_index: 6) if form.start_year_2024_or_later?),
+      Form::Sales::Pages::PersonSexRegisteredAtBirth.new("person_6_sex_registered_at_birth", nil, self, person_index: 6),
       Form::Sales::Pages::PersonGenderIdentity.new("person_6_gender_identity", nil, self, person_index: 6),
       Form::Sales::Pages::PersonWorkingSituation.new("person_6_working_situation", nil, self, person_index: 6),
       Form::Sales::Pages::RetirementValueCheck.new("working_situation_6_retirement_value_check", nil, self, person_index: 6),
diff --git a/config/locales/forms/2026/sales/household_characteristics.en.yml b/config/locales/forms/2026/sales/household_characteristics.en.yml
index 36354eb3e..01fe94769 100644
--- a/config/locales/forms/2026/sales/household_characteristics.en.yml
+++ b/config/locales/forms/2026/sales/household_characteristics.en.yml
@@ -20,8 +20,8 @@ en:
             page_header: ""
             check_answer_label: "Buyer 1’s sex registered at birth"
             check_answer_prompt: ""
-            hint_text: "This is your sex that was registered at birth. The next question will ask about your gender identity."
-            question_text: "What is your sex?"
+            hint_text: "This is the sex that was registered at birth. The next question will ask about the buyer's gender identity."
+            question_text: "What was buyer 1's sex at birth?"
 
           sex1:
             page_header: ""
@@ -137,6 +137,20 @@ en:
                 hint_text: ""
                 question_text: "Age"
 
+          sexRAB2:
+            buyer:
+              page_header: ""
+              check_answer_label: "Buyer 2’s sex registered at birth"
+              check_answer_prompt: ""
+              hint_text: "This is the sex that was registered at birth. The next question will ask about the buyer's gender identity."
+              question_text: "What was buyer 2's sex at birth?"
+            person:
+              page_header: ""
+              check_answer_label: "Person 2’s sex registered at birth"
+              check_answer_prompt: ""
+              hint_text: "This is the sex that was registered at birth. The next question will ask about the person's gender identity."
+              question_text: "What was person 2's sex at birth?"
+
           sex2:
             buyer:
               page_header: ""
@@ -273,6 +287,13 @@ en:
               hint_text: ""
               question_text: "Age"
 
+          sexRAB3:
+            page_header: ""
+            check_answer_label: "Person 3’s sex registered at birth"
+            check_answer_prompt: ""
+            hint_text: "This is the sex that was registered at birth. The next question will ask about the person's gender identity."
+            question_text: "What was person 3's sex at birth?"
+
           sex3:
             page_header: ""
             check_answer_label: "Person 3’s gender identity"
@@ -314,6 +335,13 @@ en:
               hint_text: ""
               question_text: "Age"
 
+          sexRAB4:
+            page_header: ""
+            check_answer_label: "Person 4’s sex registered at birth"
+            check_answer_prompt: ""
+            hint_text: "This is the sex that was registered at birth. The next question will ask about the person's gender identity."
+            question_text: "What was person 4's sex at birth?"
+
           sex4:
             page_header: ""
             check_answer_label: "Person 4’s gender identity"
@@ -355,6 +383,13 @@ en:
               hint_text: ""
               question_text: "Age"
 
+          sexRAB5:
+            page_header: ""
+            check_answer_label: "Person 5’s sex registered at birth"
+            check_answer_prompt: ""
+            hint_text: "This is the sex that was registered at birth. The next question will ask about the person's gender identity."
+            question_text: "What was person 5's sex at birth?"
+
           sex5:
             page_header: ""
             check_answer_label: "Person 5’s gender identity"
@@ -396,6 +431,13 @@ en:
               hint_text: ""
               question_text: "Age"
 
+          sexRAB6:
+            page_header: ""
+            check_answer_label: "Person 6’s sex registered at birth"
+            check_answer_prompt: ""
+            hint_text: "This is the sex that was registered at birth. The next question will ask about the person's gender identity."
+            question_text: "What was person 6's sex at birth?"
+
           sex6:
             page_header: ""
             check_answer_label: "Person 6’s gender identity"