diff --git a/src/main/java/simpaths/model/Person.java b/src/main/java/simpaths/model/Person.java
index 4376aa9f5..66018a4f3 100644
--- a/src/main/java/simpaths/model/Person.java
+++ b/src/main/java/simpaths/model/Person.java
@@ -49,6 +49,7 @@ public class Person implements EventListener, IDoubleSource, IIntSource, Weight,
     private Long idOriginalHH;
     private Long idMother;
     private Long idFather;
+    private Long idPartner;
     private Boolean clonedFlag;
     private Boolean bornInSimulation; //Flag to keep track of newborns
     private Long seed;
@@ -59,6 +60,7 @@ public class Person implements EventListener, IDoubleSource, IIntSource, Weight,
 
     // person level variables
     private int dag; //Age
+    private Dcpst dcpst;
     @Enumerated(EnumType.STRING) private Indicator adultchildflag;
     @Transient private boolean ioFlag;         // true if a dummy person instantiated for IO decision solution
     @Enumerated(EnumType.STRING) private Gender dgn;             // gender
@@ -712,6 +714,7 @@ public enum Processes {
         SocialCareProvision,
         Unemployment,
         Update,
+        UpdateOutputVariables,
         UpdatePotentialHourlyEarnings,	//Needed to union matching and labour supply
     }
 
@@ -724,6 +727,9 @@ public void onEvent(Enum<?> type) {
             case Update -> {
                 updateVariables(false);
             }
+            case UpdateOutputVariables ->  {
+                updateOutputVariables();
+            }
             case ProjectEquivConsumption -> {
                 projectEquivConsumption();
             }
@@ -1896,6 +1902,11 @@ protected void updateVariables(boolean initialUpdate) {
         }
     }
 
+    private void updateOutputVariables() {
+        idPartner = getPartnerID();
+        dcpst = getDcpst();
+    }
+
     private void updateLaggedVariables(boolean initialUpdate) {
 
         les_c4_lag1 = les_c4;
@@ -4332,6 +4343,13 @@ public Person getPartner() {
         return null;
     }
 
+    public Long getPartnerID() {
+        Person partner = this.getPartner();
+        if (partner != null) {
+            return partner.getId();
+        } else return null;
+    }
+
     private void nullPartnerVariables() {
 
         careHoursFromPartnerWeekly = 0.0;
diff --git a/src/main/java/simpaths/model/SimPathsModel.java b/src/main/java/simpaths/model/SimPathsModel.java
index 43b42c173..2074ab241 100644
--- a/src/main/java/simpaths/model/SimPathsModel.java
+++ b/src/main/java/simpaths/model/SimPathsModel.java
@@ -594,6 +594,7 @@ public void buildSchedule() {
         addCollectionEventToAllYears(persons, Person.Processes.HealthEQ5D);
         addEventToAllYears(Processes.CheckForImperfectTaxDBMatches);
         addEventToAllYears(tests, Tests.Processes.RunTests); //Run tests
+        addCollectionEventToAllYears(persons, Person.Processes.UpdateOutputVariables); // Update idPartner, dhhtp_c4
         addEventToAllYears(Processes.EndYear);
 
         // UPDATE YEAR