diff --git a/app/models/case_log.rb b/app/models/case_log.rb
index f21b3338d..911e72525 100644
--- a/app/models/case_log.rb
+++ b/app/models/case_log.rb
@@ -193,7 +193,11 @@ class CaseLog < ApplicationRecord
     end
   end
 
-
+  def incref
+    if net_income_known == "Prefer not to say"
+      1
+    end
+  end
 
 private
 
@@ -253,6 +257,10 @@ private
       dynamically_not_required << "ecstat#{n}"
     end
 
+    if net_income_known != "Prefer not to say"
+      dynamically_not_required << "incref"
+    end
+
     required.delete_if { |key, _value| dynamically_not_required.include?(key) }
   end
 end
diff --git a/db/migrate/20211111151625_add_incref_field.rb b/db/migrate/20211111151625_add_incref_field.rb
new file mode 100644
index 000000000..ece9a458b
--- /dev/null
+++ b/db/migrate/20211111151625_add_incref_field.rb
@@ -0,0 +1,7 @@
+class AddIncrefField < ActiveRecord::Migration[6.1]
+  def change
+    change_table :case_logs, bulk: true do |t|
+      t.column :incref, :integer
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 5b1c02e62..4b2e52c89 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.define(version: 2021_11_11_143319) do
+ActiveRecord::Schema.define(version: 2021_11_11_151625) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -153,6 +153,7 @@ ActiveRecord::Schema.define(version: 2021_11_11_143319) do
     t.integer "mrcmonth"
     t.integer "mrcyear"
     t.integer "other_hhmemb"
+    t.integer "incref"
     t.index ["discarded_at"], name: "index_case_logs_on_discarded_at"
   end
 
diff --git a/spec/controllers/case_logs_controller_spec.rb b/spec/controllers/case_logs_controller_spec.rb
index 007b76f8c..8192173fc 100644
--- a/spec/controllers/case_logs_controller_spec.rb
+++ b/spec/controllers/case_logs_controller_spec.rb
@@ -181,10 +181,10 @@ RSpec.describe CaseLogsController, type: :controller do
     context "partition date" do
       let(:case_log_with_date) do
         {
-          :"mrcdate(1i)" => "2021",
-          :"mrcdate(2i)" => "05",
-          :"mrcdate(3i)" => "04",
-          :page => "major_repairs_date",
+          "mrcdate(1i)": "2021",
+          "mrcdate(2i)": "05",
+          "mrcdate(3i)": "04",
+          page: "major_repairs_date",
         }
       end
       it "saves full and partial dates" do