diff --git a/PWGJE/Tasks/jetHadronRecoil.cxx b/PWGJE/Tasks/jetHadronRecoil.cxx
index cdeb3fff418..45ea26b72ed 100644
--- a/PWGJE/Tasks/jetHadronRecoil.cxx
+++ b/PWGJE/Tasks/jetHadronRecoil.cxx
@@ -143,7 +143,7 @@ struct JetHadronRecoil {
 
     registry.add("hZvtxSelected", "Z vertex position;Z_{vtx};entries", {HistType::kTH1F, {{80, -20, 20}}}, doSumw);
 
-    if (doprocessData || doprocessDataWithRhoSubtraction || doprocessMCD || doprocessMCDWithRhoSubtraction || doprocessMCDWeighted || doprocessMCDWeightedWithRhoSubtraction || doprocessMCP || doprocessMCPWeighted) {
+    if (doprocessData || doprocessDataWithRhoSubtraction || doprocessMCD || doprocessMCDWithRhoSubtraction || doprocessMCDWeighted || doprocessMCDWeightedWithRhoSubtraction || doprocessMCP || doprocessMCPWeighted || doprocessMCPOnTheFly || doprocessMCPOnTheFlyWeighted) {
       registry.add("hNtrig", "number of triggers;trigger type;entries", {HistType::kTH1F, {{2, 0, 2}}}, doSumw);
       registry.add("hSignalTriggersPtHard", "Signal triggers vs PtHard", {HistType::kTH1F, {pThatAxis}}, doSumw);
       registry.add("hReferenceTriggersPtHard", "Reference triggers vs PtHard", {HistType::kTH1F, {pThatAxis}}, doSumw);
@@ -186,7 +186,7 @@ struct JetHadronRecoil {
       registry.add("hPtTrackMatchedToCollisions", "Track p_{T};p_{T};entries", {HistType::kTH1F, {{200, 0, 200}}}, doSumw);
     }
 
-    if (doprocessMCP || doprocessMCPWeighted) {
+    if (doprocessMCP || doprocessMCPWeighted || doprocessMCPOnTheFly || doprocessMCPOnTheFlyWeighted) {
       registry.add("hPartvsJets", "comparing leading particles and jets;p_{T,part};p_{T,jet};#hat{p}", {HistType::kTH3F, {{200, 0, 200}, {500, -100, 400}, {195, 5, 200}}}, doSumw);
       registry.add("hPtPart", "Particle p_{T};p_{T};entries", {HistType::kTH1F, {{200, 0, 200}}}, doSumw);
       registry.add("hEtaPart", "Particle #eta;#eta;entries", {HistType::kTH1F, {{100, -1.0, 1.0}}}, doSumw);
@@ -923,6 +923,36 @@ struct JetHadronRecoil {
   }
   PROCESS_SWITCH(JetHadronRecoil, processMCPWeighted, "process MC particle level with event weights", false);
 
+  void processMCPOnTheFly(aod::JetMcCollision const& mccollision,
+                          soa::Filtered<soa::Join<aod::ChargedMCParticleLevelJets, aod::ChargedMCParticleLevelJetConstituents>> const& jets,
+                          soa::Filtered<aod::JetParticles> const& particles)
+  {
+    if (std::abs(mccollision.posZ()) > vertexZCut) {
+      return;
+    }
+    if (mccollision.ptHard() < pTHatMinEvent) {
+      return;
+    }
+    registry.fill(HIST("hZvtxSelected"), mccollision.posZ());
+    fillMCPHistograms(jets, particles, 1.0, mccollision.ptHard());
+  }
+  PROCESS_SWITCH(JetHadronRecoil, processMCPOnTheFly, "process MC particle level for on-the-fly simulations", false);
+
+  void processMCPOnTheFlyWeighted(aod::JetMcCollision const& mccollision,
+                                  soa::Filtered<soa::Join<aod::ChargedMCParticleLevelJets, aod::ChargedMCParticleLevelJetConstituents>> const& jets,
+                                  soa::Filtered<aod::JetParticles> const& particles)
+  {
+    if (std::abs(mccollision.posZ()) > vertexZCut) {
+      return;
+    }
+    if (mccollision.ptHard() < pTHatMinEvent) {
+      return;
+    }
+    registry.fill(HIST("hZvtxSelected"), mccollision.posZ(), mccollision.weight());
+    fillMCPHistograms(jets, particles, mccollision.weight(), mccollision.ptHard());
+  }
+  PROCESS_SWITCH(JetHadronRecoil, processMCPOnTheFlyWeighted, "process MC particle level for on-the-fly simulations with event weights", false);
+
   void processJetsMCPMCDMatched(aod::JetMcCollisions::iterator const& mccollision,
                                 soa::SmallGroups<aod::JetCollisionsMCD> const& collisions,
                                 soa::Filtered<soa::Join<aod::ChargedMCDetectorLevelJets, aod::ChargedMCDetectorLevelJetConstituents, aod::ChargedMCDetectorLevelJetsMatchedToChargedMCParticleLevelJets>> const& mcdjets,