diff --git a/src/worker/plugins/run.ts b/src/worker/plugins/run.ts
index 632ef078..3d4fd1db 100644
--- a/src/worker/plugins/run.ts
+++ b/src/worker/plugins/run.ts
@@ -58,6 +58,7 @@ export async function runProcessEvent(server: Hub, event: PluginEvent): Promise<
 
     const pluginsSucceeded = []
     const pluginsFailed = []
+    const pluginsDeferred = []
     for (const pluginConfig of pluginsToRun) {
         const processEvent = await pluginConfig.vm?.getProcessEvent()
 
@@ -85,13 +86,20 @@ export async function runProcessEvent(server: Hub, event: PluginEvent): Promise<
                 return null
             }
         }
+
+        const onEvent = await pluginConfig.vm?.getOnEvent()
+        const onSnapshot = await pluginConfig.vm?.getOnSnapshot()
+        if (onEvent || onSnapshot) {
+            pluginsDeferred.push(`${pluginConfig.plugin?.name} (${pluginConfig.id})`)
+        }
     }
 
-    if (pluginsSucceeded.length > 0 || pluginsFailed.length > 0) {
+    if (pluginsSucceeded.length > 0 || pluginsFailed.length > 0 || pluginsDeferred.length > 0) {
         event.properties = {
             ...event.properties,
             $plugins_succeeded: pluginsSucceeded,
             $plugins_failed: pluginsFailed,
+            $plugins_deferred: pluginsDeferred,
         }
     }
 
diff --git a/tests/plugins.test.ts b/tests/plugins.test.ts
index 4f101fd5..dc546824 100644
--- a/tests/plugins.test.ts
+++ b/tests/plugins.test.ts
@@ -138,6 +138,7 @@ test('plugin meta has what it should have', async () => {
     const returnedEvent = await runProcessEvent(hub, event)
 
     expect(Object.keys(returnedEvent!.properties!).sort()).toEqual([
+        '$plugins_deferred',
         '$plugins_failed',
         '$plugins_succeeded',
         'attachments',
@@ -234,6 +235,7 @@ test('plugin changing event.team_id throws error', async () => {
         properties: {
             $plugins_failed: ['test-maxmind-plugin (39)'],
             $plugins_succeeded: [],
+            $plugins_deferred: [],
         },
         team_id: 2,
     }
@@ -275,6 +277,7 @@ test('plugin throwing error does not prevent ingestion and failure is noted in e
         properties: {
             $plugins_failed: ['test-maxmind-plugin (39)'],
             $plugins_succeeded: [],
+            $plugins_deferred: [],
         },
     }
     expect(returnedEvent).toEqual(expectedReturnEvent)
@@ -308,6 +311,41 @@ test('events have property $plugins_succeeded set to the plugins that succeeded'
         properties: {
             $plugins_failed: [],
             $plugins_succeeded: ['test-maxmind-plugin (39)'],
+            $plugins_deferred: [],
+        },
+    }
+    expect(returnedEvent).toEqual(expectedReturnEvent)
+})
+
+test('events have property $plugins_deferred set to the plugins that run after processEvent', async () => {
+    // silence some spam
+    console.log = jest.fn()
+    console.error = jest.fn()
+
+    getPluginRows.mockReturnValueOnce([
+        mockPluginWithArchive(`
+            function onEvent (event) {
+                return event
+            }
+        `),
+    ])
+    getPluginConfigRows.mockReturnValueOnce([pluginConfig39])
+    getPluginAttachmentRows.mockReturnValueOnce([pluginAttachment1])
+
+    await setupPlugins(hub)
+    const { pluginConfigs } = hub
+
+    expect(await pluginConfigs.get(39)!.vm!.getTasks(PluginTaskType.Schedule)).toEqual({})
+
+    const event = { event: '$test', properties: {}, team_id: 2 } as PluginEvent
+    const returnedEvent = await runProcessEvent(hub, { ...event })
+
+    const expectedReturnEvent = {
+        ...event,
+        properties: {
+            $plugins_failed: [],
+            $plugins_succeeded: [],
+            $plugins_deferred: ['test-maxmind-plugin (39)'],
         },
     }
     expect(returnedEvent).toEqual(expectedReturnEvent)