diff --git a/pkg/innerring/blocktimer.go b/pkg/innerring/blocktimer.go
index 0fe4daed34..38d58edcf6 100644
--- a/pkg/innerring/blocktimer.go
+++ b/pkg/innerring/blocktimer.go
@@ -95,8 +95,11 @@ func newEpochTimer(args *epochTimerArgs) *timer.BlockTimer {
 				return
 			}
 
+			estimationEpoch := epochN - 1
+			args.l.Info("stop estimation collections", zap.Uint64("epoch", estimationEpoch))
+
 			prm := container.StopEstimationPrm{}
-			prm.SetEpoch(epochN - 1)
+			prm.SetEpoch(estimationEpoch)
 
 			err := args.cnrWrapper.StopEstimation(prm)
 			if err != nil {
diff --git a/pkg/innerring/processors/netmap/process_epoch.go b/pkg/innerring/processors/netmap/process_epoch.go
index 7314e0e896..745766c412 100644
--- a/pkg/innerring/processors/netmap/process_epoch.go
+++ b/pkg/innerring/processors/netmap/process_epoch.go
@@ -45,12 +45,16 @@ func (np *Processor) processNewEpoch(ev netmapEvent.NewEpoch) {
 		return
 	}
 
+	estimationEpoch := epoch - 1
+
 	prm := cntClient.StartEstimationPrm{}
 
-	prm.SetEpoch(epoch - 1)
+	prm.SetEpoch(estimationEpoch)
 	prm.SetHash(ev.TxHash())
 
 	if epoch > 0 { // estimates are invalid in genesis epoch
+		np.log.Info("start estimation collection", zap.Uint64("epoch", estimationEpoch))
+
 		err = np.containerWrp.StartEstimation(prm)
 
 		if err != nil {