diff --git a/app/controllers/schemes_controller.rb b/app/controllers/schemes_controller.rb
index 6766ffe85..6e481b60e 100644
--- a/app/controllers/schemes_controller.rb
+++ b/app/controllers/schemes_controller.rb
@@ -44,7 +44,7 @@ class SchemesController < ApplicationController
   def deactivate
     @scheme.run_deactivation_validations!
 
-    if @scheme.update!(deactivation_date:)
+    if @scheme.scheme_deactivation_periods.create!(deactivation_date:) && update_affected_logs
       flash[:notice] = deactivate_success_notice
     end
     redirect_to scheme_details_path(@scheme)
@@ -319,4 +319,8 @@ private
 
     Time.zone.local(year.to_i, month.to_i, day.to_i) if Date.valid_date?(year.to_i, month.to_i, day.to_i)
   end
+
+  def update_affected_logs
+    @scheme.lettings_logs.filter_by_before_startdate(deactivation_date.to_time).update!(location: nil, scheme: nil)
+  end
 end
diff --git a/app/models/lettings_log.rb b/app/models/lettings_log.rb
index 574694f51..fb17bb613 100644
--- a/app/models/lettings_log.rb
+++ b/app/models/lettings_log.rb
@@ -45,7 +45,7 @@ class LettingsLog < Log
                           .or(filter_by_postcode(param))
                           .or(filter_by_id(param))
                     }
-  scope :filter_by_before_startdate, ->(date) { left_joins(:location).where("lettings_logs.startdate >= ?", date) }
+  scope :filter_by_before_startdate, ->(date) { where("lettings_logs.startdate >= ?", date) }
 
   AUTOGENERATED_FIELDS = %w[id status created_at updated_at discarded_at].freeze
   OPTIONAL_FIELDS = %w[first_time_property_let_as_social_housing tenancycode propcode].freeze
diff --git a/app/models/scheme.rb b/app/models/scheme.rb
index 5de804c58..13349674f 100644
--- a/app/models/scheme.rb
+++ b/app/models/scheme.rb
@@ -3,6 +3,7 @@ class Scheme < ApplicationRecord
   belongs_to :managing_organisation, optional: true, class_name: "Organisation"
   has_many :locations, dependent: :delete_all
   has_many :lettings_logs, class_name: "LettingsLog", dependent: :delete_all
+  has_many :scheme_deactivation_periods, class_name: "SchemeDeactivationPeriod"
 
   has_paper_trail
 
@@ -22,7 +23,7 @@ class Scheme < ApplicationRecord
 
   auto_strip_attributes :service_name
 
-  attr_accessor :deactivation_date_type, :run_deactivation_validations
+  attr_accessor :deactivation_date_type, :deactivation_date, :run_deactivation_validations
 
   SENSITIVE = {
     No: 0,
@@ -245,7 +246,7 @@ class Scheme < ApplicationRecord
       end
     else
       collection_start_date = FormHandler.instance.current_collection_start_date
-      unless deactivation_date.between?(collection_start_date, Date.new(2200, 1, 1))
+      unless deactivation_date.between?(collection_start_date, Time.zone.local(2200, 1, 1))
         errors.add(:deactivation_date, message: I18n.t("validations.scheme.deactivation_date.out_of_range", date: collection_start_date.to_formatted_s(:govuk_date)))
       end
     end
diff --git a/app/models/scheme_deactivation_period.rb b/app/models/scheme_deactivation_period.rb
new file mode 100644
index 000000000..5caba5c7a
--- /dev/null
+++ b/app/models/scheme_deactivation_period.rb
@@ -0,0 +1,3 @@
+class SchemeDeactivationPeriod < ApplicationRecord
+  scope :deactivations_without_reactivation, -> { where(reactivation_date: nil) }
+end
diff --git a/spec/requests/schemes_controller_spec.rb b/spec/requests/schemes_controller_spec.rb
index 5ad18663e..59b748c96 100644
--- a/spec/requests/schemes_controller_spec.rb
+++ b/spec/requests/schemes_controller_spec.rb
@@ -250,41 +250,15 @@ RSpec.describe SchemesController, type: :request do
         before do
           Timecop.freeze(Time.utc(2022, 10, 10))
           sign_in user
-          scheme.deactivation_date = deactivation_date
-          scheme.deactivation_date_type = deactivation_date_type
-          scheme.save!
           get "/schemes/#{scheme.id}"
         end
 
         context "with active scheme" do
-          let(:deactivation_date) { nil }
-          let(:deactivation_date_type) { nil }
-
           it "renders deactivate this scheme" do
             expect(response).to have_http_status(:ok)
             expect(page).to have_link("Deactivate this scheme", href: "/schemes/#{scheme.id}/new-deactivation")
           end
         end
-
-        context "with deactivated scheme" do
-          let(:deactivation_date) { Time.utc(2022, 10, 9) }
-          let(:deactivation_date_type) { "other" }
-
-          it "renders reactivate this scheme" do
-            expect(response).to have_http_status(:ok)
-            expect(page).to have_link("Reactivate this scheme", href: "/schemes/#{scheme.id}/reactivate")
-          end
-        end
-
-        context "with scheme that's deactivating soon" do
-          let(:deactivation_date) { Time.utc(2022, 10, 12) }
-          let(:deactivation_date_type) { "other" }
-
-          it "renders reactivate this scheme" do
-            expect(response).to have_http_status(:ok)
-            expect(page).to have_link("Reactivate this scheme", href: "/schemes/#{scheme.id}/reactivate")
-          end
-        end
       end
     end
 
@@ -1768,8 +1742,11 @@ RSpec.describe SchemesController, type: :request do
     context "when signed in as a data coordinator" do
       let(:user) { FactoryBot.create(:user, :data_coordinator) }
       let!(:scheme) { FactoryBot.create(:scheme, owning_organisation: user.organisation) }
+      let!(:location) { FactoryBot.create(:location, scheme:) }
       let(:startdate) { Time.utc(2021, 1, 2) }
       let(:deactivation_date) { Time.utc(2022, 10, 10) }
+      let!(:lettings_log) { FactoryBot.create(:lettings_log, :sh, location:, scheme:, startdate:, owning_organisation: user.organisation) }
+      let(:startdate) { Time.utc(2022, 10, 11) }
 
       before do
         Timecop.freeze(Time.utc(2022, 10, 10))
@@ -1810,9 +1787,31 @@ RSpec.describe SchemesController, type: :request do
           follow_redirect!
           follow_redirect!
           expect(response).to have_http_status(:ok)
-          expect(page).to have_css(".govuk-notification-banner.govuk-notification-banner--success")
           scheme.reload
-          expect(scheme.deactivation_date).to eq(deactivation_date)
+          expect(scheme.scheme_deactivation_periods.count).to eq(1)
+          expect(scheme.scheme_deactivation_periods.first.deactivation_date).to eq(deactivation_date)
+        end
+
+        context "and a log startdate is after scheme deactivation date" do
+          it "clears the scheme and scheme answers" do
+            expect(lettings_log.scheme).to eq(scheme)
+            expect(lettings_log.scheme).to eq(scheme)
+            lettings_log.reload
+            expect(lettings_log.scheme).to eq(nil)
+            expect(lettings_log.scheme).to eq(nil)
+          end
+        end
+
+        context "and a log startdate is before scheme deactivation date" do
+          let(:startdate) { Time.utc(2022, 10, 9) }
+
+          it "does not update the log" do
+            expect(lettings_log.scheme).to eq(scheme)
+            expect(lettings_log.scheme).to eq(scheme)
+            lettings_log.reload
+            expect(lettings_log.scheme).to eq(scheme)
+            expect(lettings_log.scheme).to eq(scheme)
+          end
         end
       end