diff --git a/app/components/support_interface/application_summary_component.rb b/app/components/support_interface/application_summary_component.rb
index e2d4f0995ae..a86925ef81c 100644
--- a/app/components/support_interface/application_summary_component.rb
+++ b/app/components/support_interface/application_summary_component.rb
@@ -7,6 +7,7 @@ class ApplicationSummaryComponent < ViewComponent::Base
              :submitted_at,
              :submitted?,
              :updated_at,
+             :candidate,
              to: :application_form
 
     def initialize(application_form:)
@@ -25,6 +26,7 @@ def rows
         subsequent_application_row,
         average_distance_row,
         editable_extension_row,
+        one_login_account_row,
       ].compact
     end
 
@@ -85,6 +87,13 @@ def candidate_id_row
       }
     end
 
+    def one_login_account_row
+      {
+        key: 'Has One Login account',
+        value: one_login? ? 'Yes' : 'No',
+      }
+    end
+
     def state_row
       {
         key: 'State',
@@ -140,6 +149,10 @@ def formatted_status
       "<strong>#{name}</strong><br>#{desc}".html_safe
     end
 
+    def one_login?
+      candidate.one_login_connected?
+    end
+
     attr_reader :application_form
   end
 end
diff --git a/app/models/candidate.rb b/app/models/candidate.rb
index cfa22929f9e..380b5cd4021 100644
--- a/app/models/candidate.rb
+++ b/app/models/candidate.rb
@@ -121,6 +121,10 @@ def recoverable?
       !application_choices_submitted?
   end
 
+  def one_login_connected?
+    one_login_auth.present?
+  end
+
 private
 
   def downcase_email
diff --git a/spec/components/support_interface/application_summary_component_spec.rb b/spec/components/support_interface/application_summary_component_spec.rb
index 7949bdd27a3..5f9c3dfa80e 100644
--- a/spec/components/support_interface/application_summary_component_spec.rb
+++ b/spec/components/support_interface/application_summary_component_spec.rb
@@ -47,5 +47,53 @@
         expect(result.css('.govuk-summary-list__key').text).not_to include('Is this application editable')
       end
     end
+
+    context 'when the candidate has a OneLogin account' do
+      it 'displays "Yes" for the One Login account row' do
+        candidate = create(:candidate)
+        candidate.create_one_login_auth!(
+          token: '123',
+          email_address: candidate.email_address,
+        )
+        application_form = create(:completed_application_form, candidate:)
+
+        result = render_inline(described_class.new(application_form:))
+
+        expect(result.css('.govuk-summary-list__key').text).to include('Has One Login account')
+        expect(result.css('.govuk-summary-list__value').text).to include('Yes')
+      end
+    end
+
+    context 'when the candidate does not have a OneLogin account' do
+      it 'displays "No" for the One Login account row' do
+        candidate = create(:candidate)
+        application_form = create(:completed_application_form, candidate:)
+
+        result = render_inline(described_class.new(application_form:))
+
+        expect(result.css('.govuk-summary-list__key').text).to include('Has One Login account')
+        expect(result.css('.govuk-summary-list__value').text).to include('No')
+      end
+    end
+
+    context 'when the candidate had a OneLogin account but it was deleted' do
+      it 'displays "No" for the One Login account row' do
+        candidate = create(:candidate)
+        one_login_auth = candidate.create_one_login_auth!(
+          token: '123',
+          email_address: candidate.email_address,
+        )
+
+        one_login_auth.delete
+        candidate.reload
+
+        application_form = create(:completed_application_form, candidate:)
+
+        result = render_inline(described_class.new(application_form:))
+
+        expect(result.css('.govuk-summary-list__key').text).to include('Has One Login account')
+        expect(result.css('.govuk-summary-list__value').text).to include('No')
+      end
+    end
   end
 end
diff --git a/spec/models/candidate_spec.rb b/spec/models/candidate_spec.rb
index a7fe7872d72..9e004035e6f 100644
--- a/spec/models/candidate_spec.rb
+++ b/spec/models/candidate_spec.rb
@@ -404,4 +404,22 @@
       end
     end
   end
+
+  describe '#one_login_connected?' do
+    let(:candidate) { create(:candidate) }
+
+    context 'when the candidate has a OneLoginAuth record' do
+      before { create(:one_login_auth, candidate:) }
+
+      it 'returns true' do
+        expect(candidate.one_login_connected?).to be true
+      end
+    end
+
+    context 'when the candidate does not have a OneLoginAuth record' do
+      it 'returns false' do
+        expect(candidate.one_login_connected?).to be false
+      end
+    end
+  end
 end