diff --git a/app/controllers/case_logs_controller.rb b/app/controllers/case_logs_controller.rb
index 859df2bd2..cc2a4b484 100644
--- a/app/controllers/case_logs_controller.rb
+++ b/app/controllers/case_logs_controller.rb
@@ -58,8 +58,7 @@ class CaseLogsController < ApplicationController
     @case_log = CaseLog.find(params[:id])
     @case_log.page = params[:case_log][:page]
     responses_for_page = responses_for_page(@case_log.page)
-    inferred_answers = get_inferred_answers(responses_for_page)
-    if @case_log.update(responses_for_page.merge(inferred_answers)) && @case_log.has_no_unresolved_soft_errors?
+    if @case_log.update(responses_for_page) && @case_log.has_no_unresolved_soft_errors?
       redirect_path = get_next_page_path(form, @case_log.page, @case_log)
       redirect_to(send(redirect_path, @case_log))
     else
@@ -117,23 +116,6 @@ private
     end
   end
 
-  def get_inferred_answers(responses_for_page)
-    result = {}
-    if responses_for_page["property_postcode"].present?
-      result["postcode"], result["postcod2"] = get_inferred_postcode(params["case_log"]["property_postcode"])
-    end
-    if responses_for_page["previous_postcode"].present?
-      result["ppostc1"], result["ppostc2"] = get_inferred_postcode(params["case_log"]["previous_postcode"])
-    end
-    result
-  end
-
-  def get_inferred_postcode(postcode)
-    require "uk_postcode"
-    property_postcode = UKPostcode.parse(postcode)
-    [property_postcode.outcode, property_postcode.incode]
-  end
-
   def json_api_request?
     API_ACTIONS.include?(request["action"]) && request.format.json?
   end
diff --git a/app/models/case_log.rb b/app/models/case_log.rb
index 201f64aae..73940008b 100644
--- a/app/models/case_log.rb
+++ b/app/models/case_log.rb
@@ -137,6 +137,30 @@ class CaseLog < ApplicationRecord
     end
   end
 
+  def postcode
+    if property_postcode.present?
+      get_inferred_postcode(property_postcode).outcode
+    end
+  end
+
+  def postcod2
+    if property_postcode.present?
+      get_inferred_postcode(property_postcode).incode
+    end
+  end
+
+  def ppostc1
+    if previous_postcode.present?
+      get_inferred_postcode(previous_postcode).outcode
+    end
+  end
+
+  def ppostc2
+    if previous_postcode.present?
+      get_inferred_postcode(previous_postcode).incode
+    end
+  end
+
   def applicable_income_range
     return unless ecstat1
 
@@ -145,6 +169,11 @@ class CaseLog < ApplicationRecord
 
 private
 
+  def get_inferred_postcode(postcode)
+    require "uk_postcode"
+    UKPostcode.parse(postcode)
+  end
+
   def update_status!
     self.status = if all_fields_completed? && errors.empty?
                     "completed"