diff --git a/app/models/case_log.rb b/app/models/case_log.rb
index 76c47297c..39a17709f 100644
--- a/app/models/case_log.rb
+++ b/app/models/case_log.rb
@@ -425,6 +425,13 @@ private
         self.prevten = 30 if managing_organisation.provider_type == "LA"
       end
     end
+    (2..8).each do |idx|
+      if public_send("age#{idx}") && public_send("age#{idx}") < 16
+        self["ecstat#{idx}"] = 9
+      elsif public_send("ecstat#{idx}") == 9 && (public_send("age#{idx}").nil? || public_send("age#{idx}") >= 16)
+        self["ecstat#{idx}"] = nil
+      end
+    end
   end
 
   def process_postcode_changes!
diff --git a/spec/models/case_log_spec.rb b/spec/models/case_log_spec.rb
index 63051a7a0..5777f4306 100644
--- a/spec/models/case_log_spec.rb
+++ b/spec/models/case_log_spec.rb
@@ -1372,6 +1372,17 @@ RSpec.describe CaseLog do
         record_from_db = ActiveRecord::Base.connection.execute("select totadult from case_logs where id=#{household_case_log.id}").to_a[0]
         expect(record_from_db["totadult"]).to eq(3)
       end
+
+      it "correctly derives economic status for tenants under 16" do
+        record_from_db = ActiveRecord::Base.connection.execute("select ecstat7 from case_logs where id=#{household_case_log.id}").to_a[0]
+        expect(record_from_db["ecstat7"]).to eq(9)
+      end
+
+      it "correctly resets economic status when age changes from under 16" do
+        household_case_log.update!(age7: 17)
+        record_from_db = ActiveRecord::Base.connection.execute("select ecstat7 from case_logs where id=#{household_case_log.id}").to_a[0]
+        expect(record_from_db["ecstat7"]).to eq(nil)
+      end
     end
 
     it "correctly derives and saves has_benefits" do