diff --git a/app/services/imports/case_logs_import_service.rb b/app/services/imports/case_logs_import_service.rb
index be1605d86..3bf1bc0dc 100644
--- a/app/services/imports/case_logs_import_service.rb
+++ b/app/services/imports/case_logs_import_service.rb
@@ -42,6 +42,8 @@ module Imports
     def create_log(xml_doc)
       attributes = {}
 
+      previous_status = field_value(xml_doc, "meta", "status")
+
       # Required fields for status complete or logic to work
       # Note: order matters when we derive from previous values (attributes parameter)
       attributes["startdate"] = compose_date(xml_doc, "DAY", "MONTH", "YEAR")
@@ -56,7 +58,7 @@ module Imports
       attributes["irproduct"] = unsafe_string_as_integer(xml_doc, "IRProduct")
       attributes["irproduct_other"] = string_or_nil(xml_doc, "IRProductOther")
       attributes["rent_type"] = rent_type(xml_doc, attributes["lar"], attributes["irproduct"])
-      attributes["hhmemb"] = safe_string_as_integer(xml_doc, "HHMEMB")
+      attributes["hhmemb"] = household_members(xml_doc, previous_status)
       (1..8).each do |index|
         attributes["age#{index}"] = safe_string_as_integer(xml_doc, "P#{index}Age")
         attributes["age#{index}_known"] = age_known(xml_doc, index, attributes["hhmemb"])
@@ -170,8 +172,6 @@ module Imports
         attributes["postcode_full"] = nil
       end
 
-      previous_status = field_value(xml_doc, "meta", "status")
-
       owner_id = field_value(xml_doc, "meta", "owner-user-id").strip
       if owner_id.present?
         attributes["created_by"] = User.find_by(old_user_id: owner_id)
@@ -489,5 +489,18 @@ module Imports
         1
       end
     end
+
+    def household_members(xml_doc, previous_status)
+      hhmemb = safe_string_as_integer(xml_doc, "HHMEMB")
+      if previous_status.include?("submitted") && hhmemb.nil?
+        hhmemb = people_with_details(xml_doc).count
+        return nil if hhmemb.zero?
+      end
+      hhmemb
+    end
+
+    def people_with_details(xml_doc)
+      ((2..8).map { |x| string_or_nil(xml_doc, "P#{x}Rel") } + [string_or_nil(xml_doc, "P1Age")]).compact
+    end
   end
 end
diff --git a/spec/fixtures/softwire_imports/case_logs/0ead17cb-1668-442d-898c-0d52879ff592.xml b/spec/fixtures/softwire_imports/case_logs/0ead17cb-1668-442d-898c-0d52879ff592.xml
index 9bf6b5a87..bdd95321b 100644
--- a/spec/fixtures/softwire_imports/case_logs/0ead17cb-1668-442d-898c-0d52879ff592.xml
+++ b/spec/fixtures/softwire_imports/case_logs/0ead17cb-1668-442d-898c-0d52879ff592.xml
@@ -393,7 +393,7 @@
     <Q18aValid>1</Q18aValid>
     <Q18Valid>1</Q18Valid>
     <VACDAYS>0</VACDAYS>
-    <HHMEMB>2</HHMEMB>
+    <HHMEMB/>
     <HHTYPEP1A>1</HHTYPEP1A>
     <HHTYPEP2A>0</HHTYPEP2A>
     <HHTYPEP3A>0</HHTYPEP3A>