diff --git a/node/src/main/kotlin/net/corda/node/services/rpc/CheckpointDumper.kt b/node/src/main/kotlin/net/corda/node/services/rpc/CheckpointDumper.kt
index 7e7cc5b38d..b07e7391f4 100644
--- a/node/src/main/kotlin/net/corda/node/services/rpc/CheckpointDumper.kt
+++ b/node/src/main/kotlin/net/corda/node/services/rpc/CheckpointDumper.kt
@@ -3,6 +3,7 @@ package net.corda.node.services.rpc
 import co.paralleluniverse.fibers.Stack
 import com.fasterxml.jackson.annotation.JsonAutoDetect
 import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility
+import com.fasterxml.jackson.annotation.JsonFormat
 import com.fasterxml.jackson.annotation.JsonInclude
 import com.fasterxml.jackson.annotation.JsonInclude.Include
 import com.fasterxml.jackson.annotation.JsonValue
@@ -41,10 +42,12 @@ import net.corda.node.services.statemachine.*
 import net.corda.nodeapi.internal.persistence.CordaPersistence
 import net.corda.serialization.internal.CheckpointSerializeAsTokenContextImpl
 import net.corda.serialization.internal.withTokenContext
+import java.time.Duration
 import java.time.Instant
 import java.time.ZoneOffset.UTC
 import java.time.format.DateTimeFormatter
 import java.util.*
+import java.util.concurrent.TimeUnit
 import java.util.concurrent.atomic.AtomicInteger
 import java.util.zip.ZipEntry
 import java.util.zip.ZipOutputStream
@@ -87,7 +90,8 @@ class CheckpointDumper(private val checkpointStorage: CheckpointStorage, private
 
     fun dump() {
         try {
-            val file = serviceHub.configuration.baseDirectory / "logs" / "checkpoints_dump-${TIME_FORMATTER.format(serviceHub.clock.instant())}.zip"
+            val now = serviceHub.clock.instant()
+            val file = serviceHub.configuration.baseDirectory / "logs" / "checkpoints_dump-${TIME_FORMATTER.format(now)}.zip"
             if (lock.getAndIncrement() == 0 && !file.exists()) {
                 file.parent.toFile().mkdirs()
                 database.transaction {
@@ -95,7 +99,7 @@ class CheckpointDumper(private val checkpointStorage: CheckpointStorage, private
                         ZipOutputStream(file.outputStream()).use { zip ->
                             stream.forEach { (runId, serialisedCheckpoint) ->
                                 val checkpoint = serialisedCheckpoint.checkpointDeserialize(context = checkpointSerializationContext)
-                                val json = checkpoint.toJson(runId.uuid)
+                                val json = checkpoint.toJson(runId.uuid, now)
                                 val jsonBytes = writer.writeValueAsBytes(json)
                                 zip.putNextEntry(ZipEntry("${json.flowLogicClass.simpleName}-${runId.uuid}.json"))
                                 zip.write(jsonBytes)
@@ -112,7 +116,7 @@ class CheckpointDumper(private val checkpointStorage: CheckpointStorage, private
         }
     }
 
-    private fun Checkpoint.toJson(id: UUID): CheckpointJson {
+    private fun Checkpoint.toJson(id: UUID, now: Instant): CheckpointJson {
         val (fiber, flowLogic) = when (flowState) {
             is FlowState.Unstarted -> {
                 null to flowState.frozenFlowLogic.checkpointDeserialize(context = checkpointSerializationContext)
@@ -135,13 +139,12 @@ class CheckpointDumper(private val checkpointStorage: CheckpointStorage, private
         } else {
             emptyList()
         }
-
         return CheckpointJson(
                 id,
                 flowLogic.javaClass,
                 flowLogic,
                 flowCallStack,
-                (flowState as? FlowState.Started)?.flowIORequest?.toSuspendedOn(),
+                (flowState as? FlowState.Started)?.flowIORequest?.toSuspendedOn(suspendedTimestamp(), now),
                 invocationContext.origin.toOrigin(),
                 ourIdentity,
                 sessions.mapNotNull { it.value.toActiveSession(it.key) },
@@ -149,17 +152,19 @@ class CheckpointDumper(private val checkpointStorage: CheckpointStorage, private
         )
     }
 
+    private fun Checkpoint.suspendedTimestamp(): Instant = invocationContext.trace.invocationId.timestamp
+
     @Suppress("unused")
     private class FlowCall(val flowClass: Class<*>, val progressStep: String?)
 
     @Suppress("unused")
     @JsonInclude(Include.NON_NULL)
     private class Origin(
-        val rpc: String? = null,
-        val peer: CordaX500Name? = null,
-        val service: String? = null,
-        val scheduled: ScheduledStateRef? = null,
-        val shell: InvocationOrigin.Shell? = null
+            val rpc: String? = null,
+            val peer: CordaX500Name? = null,
+            val service: String? = null,
+            val scheduled: ScheduledStateRef? = null,
+            val shell: InvocationOrigin.Shell? = null
     )
 
     private fun InvocationOrigin.toOrigin(): Origin {
@@ -198,19 +203,22 @@ class CheckpointDumper(private val checkpointStorage: CheckpointStorage, private
             val waitForSessionConfirmations: FlowIORequest.WaitForSessionConfirmations? = null,
             val customOperation: FlowIORequest.ExecuteAsyncOperation<*>? = null,
             val forceCheckpoint: FlowIORequest.ForceCheckpoint? = null
-    )
+    ) {
+        @JsonFormat(pattern ="yyyy-MM-dd'T'HH:mm:ss", timezone = "UTC")
+        lateinit var suspendedTimestamp: Instant
+        var secondsSpentWaiting: Long = 0
+    }
 
     @Suppress("unused")
     private class SendJson(val session: FlowSession, val sentPayloadType: Class<*>, val sentPayload: Any)
 
-    private fun FlowIORequest<*>.toSuspendedOn(): SuspendedOn {
+    private fun FlowIORequest<*>.toSuspendedOn(suspendedTimestamp: Instant, now: Instant): SuspendedOn {
         fun Map<FlowSession, SerializedBytes<Any>>.toJson(): List<SendJson> {
             return map {
                 val payload = it.value.deserialize()
                 SendJson(it.key, payload.javaClass, payload)
             }
         }
-
         return when (this) {
             is FlowIORequest.Send -> SuspendedOn(send = sessionToMessage.toJson())
             is FlowIORequest.Receive -> SuspendedOn(receive = sessions)
@@ -226,6 +234,9 @@ class CheckpointDumper(private val checkpointStorage: CheckpointStorage, private
                     else -> SuspendedOn(customOperation = this)
                 }
             }
+        }.also {
+            it.suspendedTimestamp = suspendedTimestamp
+            it.secondsSpentWaiting = TimeUnit.MILLISECONDS.toSeconds(Duration.between(suspendedTimestamp, now).toMillis())
         }
     }