diff --git a/ghost/core/test/e2e-webhooks/__snapshots__/posts.test.js.snap b/ghost/core/test/e2e-webhooks/__snapshots__/posts.test.js.snap
index e3a56d4080..8c5e8e1f56 100644
--- a/ghost/core/test/e2e-webhooks/__snapshots__/posts.test.js.snap
+++ b/ghost/core/test/e2e-webhooks/__snapshots__/posts.test.js.snap
@@ -649,3 +649,273 @@ Object {
   },
 }
 `;
+
+exports[`post.* events post.tag.attached event is triggered 1: [headers] 1`] = `
+Object {
+  "accept-encoding": "gzip, deflate",
+  "content-length": Any<Number>,
+  "content-type": "application/json",
+  "content-version": StringMatching /v\\\\d\\+\\\\\\.\\\\d\\+/,
+  "user-agent": StringMatching /Ghost\\\\/\\\\d\\+\\\\\\.\\\\d\\+\\\\\\.\\\\d\\+\\\\s\\\\\\(https:\\\\/\\\\/github\\.com\\\\/TryGhost\\\\/Ghost\\\\\\)/,
+}
+`;
+
+exports[`post.* events post.tag.attached event is triggered 2: [body] 1`] = `
+Object {
+  "post": Object {
+    "current": Object {
+      "authors": Array [
+        Object {
+          "accessibility": null,
+          "bio": "bio",
+          "comment_notifications": true,
+          "cover_image": null,
+          "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "email": "jbloggs@example.com",
+          "facebook": null,
+          "free_member_signup_notification": true,
+          "id": "1",
+          "last_seen": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "location": "location",
+          "meta_description": null,
+          "meta_title": null,
+          "name": "Joe Bloggs",
+          "paid_subscription_canceled_notification": false,
+          "paid_subscription_started_notification": true,
+          "profile_image": "https://example.com/super_photo.jpg",
+          "roles": Array [
+            Object {
+              "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+              "description": "Blog Owner",
+              "id": StringMatching /\\[a-f0-9\\]\\{24\\}/,
+              "name": "Owner",
+              "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+            },
+          ],
+          "slug": "joe-bloggs",
+          "status": "active",
+          "tour": null,
+          "twitter": null,
+          "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "url": "http://127.0.0.1:2369/author/joe-bloggs/",
+          "website": null,
+        },
+      ],
+      "canonical_url": null,
+      "codeinjection_foot": null,
+      "codeinjection_head": null,
+      "comment_id": StringMatching /\\[a-f0-9\\]\\{24\\}/,
+      "count": Object {
+        "clicks": 0,
+        "paid_conversions": 0,
+        "positive_feedback": 0,
+        "sentiment": 0,
+        "signups": 0,
+      },
+      "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+      "custom_excerpt": null,
+      "custom_template": null,
+      "email_only": false,
+      "email_segment": "all",
+      "email_subject": null,
+      "excerpt": "HTML Ipsum Presents
+
+Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, commodo vitae, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum o",
+      "feature_image": null,
+      "feature_image_alt": null,
+      "feature_image_caption": null,
+      "featured": false,
+      "frontmatter": null,
+      "html": "<!--kg-card-begin: markdown--><h1>HTML Ipsum Presents</h1><img src=\\"http://127.0.0.1:2369/content/images/lol.jpg\\"><p><strong>Pellentesque habitant morbi tristique</strong> senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. <em>Aenean ultricies mi vitae est.</em> Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, <code>commodo vitae</code>, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum orci, sagittis tempus lacus enim ac dui. <a href=\\\\\\"#\\\\\\">Donec non enim</a> in turpis pulvinar facilisis. Ut felis.</p><h2>Header Level 2</h2><ol><li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li><li>Aliquam tincidunt mauris eu risus.</li></ol><blockquote><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est.</p></blockquote><h3>Header Level 3</h3><ul><li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li><li>Aliquam tincidunt mauris eu risus.</li></ul><pre><code>#header h1 a{display: block;width: 300px;height: 80px;}</code></pre><!--kg-card-end: markdown-->",
+      "id": StringMatching /\\[a-f0-9\\]\\{24\\}/,
+      "meta_description": null,
+      "meta_title": null,
+      "mobiledoc": "{\\"version\\":\\"0.3.1\\",\\"markups\\":[],\\"atoms\\":[],\\"cards\\":[[\\"markdown\\",{\\"markdown\\":\\"<h1>HTML Ipsum Presents</h1><img src=\\\\\\"http://127.0.0.1:2369/content/images/lol.jpg\\\\\\"><p><strong>Pellentesque habitant morbi tristique</strong> senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. <em>Aenean ultricies mi vitae est.</em> Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, <code>commodo vitae</code>, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum orci, sagittis tempus lacus enim ac dui. <a href=\\\\\\\\\\\\\\"#\\\\\\\\\\\\\\">Donec non enim</a> in turpis pulvinar facilisis. Ut felis.</p><h2>Header Level 2</h2><ol><li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li><li>Aliquam tincidunt mauris eu risus.</li></ol><blockquote><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est.</p></blockquote><h3>Header Level 3</h3><ul><li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li><li>Aliquam tincidunt mauris eu risus.</li></ul><pre><code>#header h1 a{display: block;width: 300px;height: 80px;}</code></pre>\\"}]],\\"sections\\":[[10,0]]}",
+      "og_description": null,
+      "og_image": null,
+      "og_title": null,
+      "plaintext": "HTML Ipsum Presents
+
+Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, commodo vitae, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum orci, sagittis tempus lacus enim ac dui. Donec non enim in turpis pulvinar facilisis. Ut felis.
+
+
+Header Level 2
+
+ 1. Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
+ 2. Aliquam tincidunt mauris eu risus.
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est.
+
+
+Header Level 3
+
+ * Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
+ * Aliquam tincidunt mauris eu risus.
+
+#header h1 a{display: block;width: 300px;height: 80px;}",
+      "primary_author": Object {
+        "accessibility": null,
+        "bio": "bio",
+        "comment_notifications": true,
+        "cover_image": null,
+        "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+        "email": "jbloggs@example.com",
+        "facebook": null,
+        "free_member_signup_notification": true,
+        "id": "1",
+        "last_seen": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+        "location": "location",
+        "meta_description": null,
+        "meta_title": null,
+        "name": "Joe Bloggs",
+        "paid_subscription_canceled_notification": false,
+        "paid_subscription_started_notification": true,
+        "profile_image": "https://example.com/super_photo.jpg",
+        "roles": Array [
+          Object {
+            "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+            "description": "Blog Owner",
+            "id": StringMatching /\\[a-f0-9\\]\\{24\\}/,
+            "name": "Owner",
+            "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          },
+        ],
+        "slug": "joe-bloggs",
+        "status": "active",
+        "tour": null,
+        "twitter": null,
+        "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+        "url": "http://127.0.0.1:2369/author/joe-bloggs/",
+        "website": null,
+      },
+      "primary_tag": Object {
+        "accent_color": null,
+        "canonical_url": null,
+        "codeinjection_foot": null,
+        "codeinjection_head": null,
+        "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+        "description": null,
+        "feature_image": null,
+        "id": StringMatching /\\[a-f0-9\\]\\{24\\}/,
+        "meta_description": null,
+        "meta_title": null,
+        "name": Any<String>,
+        "og_description": null,
+        "og_image": null,
+        "og_title": null,
+        "slug": Any<String>,
+        "twitter_description": null,
+        "twitter_image": null,
+        "twitter_title": null,
+        "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+        "url": StringMatching /http:\\\\/\\\\/127\\.0\\.0\\.1:2369\\\\/\\\\w\\+\\\\//,
+        "visibility": Any<String>,
+      },
+      "published_at": null,
+      "reading_time": 1,
+      "slug": "test-post-tag-attached-webhook",
+      "status": "draft",
+      "tags": Array [
+        Object {
+          "accent_color": null,
+          "canonical_url": null,
+          "codeinjection_foot": null,
+          "codeinjection_head": null,
+          "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "description": null,
+          "feature_image": null,
+          "id": StringMatching /\\[a-f0-9\\]\\{24\\}/,
+          "meta_description": null,
+          "meta_title": null,
+          "name": Any<String>,
+          "og_description": null,
+          "og_image": null,
+          "og_title": null,
+          "slug": Any<String>,
+          "twitter_description": null,
+          "twitter_image": null,
+          "twitter_title": null,
+          "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "url": StringMatching /http:\\\\/\\\\/127\\.0\\.0\\.1:2369\\\\/\\\\w\\+\\\\//,
+          "visibility": Any<String>,
+        },
+      ],
+      "tiers": Array [
+        Object {
+          "active": true,
+          "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "description": null,
+          "id": StringMatching /\\[a-f0-9\\]\\{24\\}/,
+          "monthly_price_id": null,
+          "name": "Default Product",
+          "slug": "default-product",
+          "trial_days": 0,
+          "type": "paid",
+          "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "visibility": "public",
+          "welcome_page_url": null,
+          "yearly_price_id": null,
+        },
+        Object {
+          "active": true,
+          "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "description": null,
+          "id": StringMatching /\\[a-f0-9\\]\\{24\\}/,
+          "monthly_price_id": null,
+          "name": "Free",
+          "slug": "free",
+          "trial_days": 0,
+          "type": "free",
+          "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "visibility": "public",
+          "welcome_page_url": null,
+          "yearly_price_id": null,
+        },
+      ],
+      "title": "test post tag attached webhook",
+      "twitter_description": null,
+      "twitter_image": null,
+      "twitter_title": null,
+      "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+      "url": StringMatching /http:\\\\/\\\\/127\\.0\\.0\\.1:2369\\\\/\\\\w\\+\\\\//,
+      "uuid": StringMatching /\\[a-f0-9\\]\\{8\\}-\\[a-f0-9\\]\\{4\\}-\\[a-f0-9\\]\\{4\\}-\\[a-f0-9\\]\\{4\\}-\\[a-f0-9\\]\\{12\\}/,
+      "visibility": "public",
+    },
+    "previous": Object {
+      "tags": Array [],
+      "tiers": Array [
+        Object {
+          "active": true,
+          "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "description": null,
+          "id": StringMatching /\\[a-f0-9\\]\\{24\\}/,
+          "monthly_price_id": null,
+          "name": "Default Product",
+          "slug": "default-product",
+          "trial_days": 0,
+          "type": "paid",
+          "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "visibility": "public",
+          "welcome_page_url": null,
+          "yearly_price_id": null,
+        },
+        Object {
+          "active": true,
+          "created_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "description": null,
+          "id": StringMatching /\\[a-f0-9\\]\\{24\\}/,
+          "monthly_price_id": null,
+          "name": "Free",
+          "slug": "free",
+          "trial_days": 0,
+          "type": "free",
+          "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+          "visibility": "public",
+          "welcome_page_url": null,
+          "yearly_price_id": null,
+        },
+      ],
+    },
+  },
+}
+`;
diff --git a/ghost/core/test/e2e-webhooks/posts.test.js b/ghost/core/test/e2e-webhooks/posts.test.js
index 369a19638b..23639eeb8c 100644
--- a/ghost/core/test/e2e-webhooks/posts.test.js
+++ b/ghost/core/test/e2e-webhooks/posts.test.js
@@ -1,6 +1,6 @@
 const moment = require('moment-timezone');
 const {agentProvider, mockManager, fixtureManager, matchers} = require('../utils/e2e-framework');
-const {anyGhostAgent, anyObjectId, anyISODateTime, anyUuid, anyContentVersion, anyNumber, anyLocalURL} = matchers;
+const {anyGhostAgent, anyObjectId, anyISODateTime, anyUuid, anyContentVersion, anyNumber, anyLocalURL, anyString} = matchers;
 
 const tierSnapshot = {
     id: anyObjectId,
@@ -8,6 +8,17 @@ const tierSnapshot = {
     updated_at: anyISODateTime
 };
 
+const tagSnapshot = {
+    created_at: anyISODateTime,
+    description: null,
+    id: anyObjectId,
+    name: anyString,
+    slug: anyString,
+    updated_at: anyISODateTime,
+    url: anyLocalURL,
+    visibility: anyString
+};
+
 const buildAuthorSnapshot = (roles = true) => {
     const authorSnapshot = {
         last_seen: anyISODateTime,
@@ -41,6 +52,23 @@ const buildPostSnapshotWithTiers = ({published, tiersCount, roles = true}) => {
     };
 };
 
+const buildPostSnapshotWithTiersAndTags = ({published, tiersCount, roles = true}) => {
+    return {
+        id: anyObjectId,
+        uuid: anyUuid,
+        comment_id: anyObjectId,
+        published_at: published ? anyISODateTime : null,
+        created_at: anyISODateTime,
+        updated_at: anyISODateTime,
+        url: anyLocalURL,
+        tiers: new Array(tiersCount).fill(tierSnapshot),
+        primary_author: buildAuthorSnapshot(roles),
+        authors: new Array(1).fill(buildAuthorSnapshot(roles)),
+        primary_tag: tagSnapshot,
+        tags: new Array(1).fill(tagSnapshot)
+    };
+};
+
 const buildPreviousPostSnapshotWithTiers = ({tiersCount}) => {
     return {
         updated_at: anyISODateTime,
@@ -59,6 +87,13 @@ const buildPreviousPostSnapshotForDeletedPost = () => {
     };
 };
 
+const buildPreviousPostSnapshotWithTiersAndTags = ({tiersCount}) => {
+    return {
+        tags: [],
+        tiers: new Array(tiersCount).fill(tierSnapshot)
+    };
+};
+
 describe('post.* events', function () {
     let adminAPIAgent;
     let webhookMockReceiver;
@@ -257,4 +292,55 @@ describe('post.* events', function () {
                 }
             });
     });
+
+    it('post.tag.attached event is triggered', async function () {
+        const webhookURL = 'https://test-webhook-receiver.com/post-tag-attached/';
+        await webhookMockReceiver.mock(webhookURL);
+        await fixtureManager.insertWebhook({
+            event: 'post.tag.attached',
+            url: webhookURL
+        });
+
+        const res = await adminAPIAgent
+            .post('posts/')
+            .body({
+                posts: [{
+                    title: 'test post tag attached webhook',
+                    status: 'draft',
+                    mobiledoc: fixtureManager.get('posts', 1).mobiledoc
+                }]
+            })
+            .expectStatus(201);
+
+        const id = res.body.posts[0].id;
+        const updatedPost = res.body.posts[0];
+        updatedPost.tags = ['Getting Started'];
+
+        await adminAPIAgent
+            .put('posts/' + id)
+            .body({
+                posts: [updatedPost]
+            })
+            .expectStatus(200);
+
+        await webhookMockReceiver.receivedRequest();
+
+        webhookMockReceiver
+            .matchHeaderSnapshot({
+                'content-version': anyContentVersion,
+                'content-length': anyNumber,
+                'user-agent': anyGhostAgent
+            })
+            .matchBodySnapshot({
+                post: {
+                    current: buildPostSnapshotWithTiersAndTags({
+                        published: false,
+                        tiersCount: 2
+                    }),
+                    previous: buildPreviousPostSnapshotWithTiersAndTags({
+                        tiersCount: 2
+                    })
+                }
+            });
+    });
 });