diff --git a/packages/caliper-core/lib/worker/rate-control/compositeRate.js b/packages/caliper-core/lib/worker/rate-control/compositeRate.js
index a1ce22dd4..2d38e1390 100644
--- a/packages/caliper-core/lib/worker/rate-control/compositeRate.js
+++ b/packages/caliper-core/lib/worker/rate-control/compositeRate.js
@@ -82,21 +82,20 @@ class CompositeRateController extends RateInterface{
 
         this.controllers = [];
         this.activeControllerIndex = 0;
-        this.clientIdx = -1;
+        this.clientIdx = clientIdx + 1;
+        this.roundIndex = roundIdx;
         this.controllerSwitch = null;
         this.logControllerChange = (this.options.logChange &&
             typeof(this.options.logChange) === 'boolean' && this.options.logChange) || false;
 
-        this.__prepareControllers(clientIdx, roundIdx);
+        this.__prepareControllers();
     }
 
     /**
      * Internal method for preparing the controllers for further use.
-     * @param {number} clientIdx The 0-based index of the client who instantiates the controller.
-     * @param {number} roundIdx The 1-based index of the round the controller is instantiated in.
      * @private
      */
-    __prepareControllers(clientIdx, roundIdx) {
+    __prepareControllers() {
         let weights = this.options.weights;
         let rateControllers = this.options.rateControllers;
 
@@ -136,7 +135,7 @@ class CompositeRateController extends RateInterface{
                 continue;
             }
 
-            let info = new ControllerData(weights[i], rateControllers[i], new RateControl(rateControllers[i], clientIdx, roundIdx));
+            let info = new ControllerData(weights[i], rateControllers[i], new RateControl(rateControllers[i], this.clientIdx, this.roundIndex));
             this.controllers.push(info);
         }
 
diff --git a/packages/caliper-core/lib/worker/rate-control/recordRate.js b/packages/caliper-core/lib/worker/rate-control/recordRate.js
index 825790fa5..2b824bf50 100644
--- a/packages/caliper-core/lib/worker/rate-control/recordRate.js
+++ b/packages/caliper-core/lib/worker/rate-control/recordRate.js
@@ -47,6 +47,8 @@ class RecordRateController extends RateInterface{
      */
     constructor(opts, clientIdx, roundIdx) {
         super(opts);
+        this.roundIdx = roundIdx;
+        this.clientIdx = clientIdx + 1;
         this.records = [];
 
         if (typeof opts.pathTemplate === 'undefined') {
@@ -137,9 +139,6 @@ class RecordRateController extends RateInterface{
      * @async
      */
     async init(msg) {
-        this.roundIdx = msg.roundIdx;
-        this.clientIdx = msg.clientIdx + 1;
-
         // if we know the number of transactions beforehand, pre-allocate the array
         if (msg.numb) {
             this.records = new Array(msg.numb);
diff --git a/packages/caliper-core/lib/worker/rate-control/replayRate.js b/packages/caliper-core/lib/worker/rate-control/replayRate.js
index e6871a69d..ee309a990 100644
--- a/packages/caliper-core/lib/worker/rate-control/replayRate.js
+++ b/packages/caliper-core/lib/worker/rate-control/replayRate.js
@@ -42,9 +42,13 @@ class ReplayRateController extends RateInterface{
      * Creates a new instance of the {ReplayRateController} class.
      * @constructor
      * @param {object} opts Options for the rate controller.
+     * @param {number} clientIdx The 0-based index of the client who instantiates the controller.
+     * @param {number} roundIdx The 1-based index of the round the controller is instantiated in.
      */
-    constructor(opts) {
+    constructor(opts, clientIdx, roundIdx) {
         super(opts);
+        this.roundIdx = roundIdx;
+        this.clientIdx = clientIdx + 1;
         this.records = [];
 
         if (typeof opts.pathTemplate === 'undefined') {
@@ -123,9 +127,6 @@ class ReplayRateController extends RateInterface{
      * @async
      */
     async init(msg) {
-        this.roundIdx = msg.roundIdx;
-        this.clientIdx = msg.clientIdx + 1;
-
         // resolve template path placeholders
         this.pathTemplate = this.pathTemplate.replace(/<R>/gi, this.roundIdx.toString());
         this.pathTemplate = this.pathTemplate.replace(/<C>/gi, this.clientIdx.toString());