diff --git a/assets/javascripts/discourse/connectors/category-custom-settings/question-answer-category-settings.hbs b/assets/javascripts/discourse/connectors/category-custom-settings/question-answer-category-settings.hbs
new file mode 100644
index 00000000..60b71bdb
--- /dev/null
+++ b/assets/javascripts/discourse/connectors/category-custom-settings/question-answer-category-settings.hbs
@@ -0,0 +1,7 @@
+<h3>{{i18n "category.qa_settings_heading"}}</h3>
+<section class="field">
+  <label>
+    <Input @type="checkbox" @checked={{this.category.custom_fields.create_as_qa_default}} />
+    {{i18n "category.create_as_qa_default"}}
+  </label>
+</section>
diff --git a/assets/javascripts/discourse/initializers/extend-composer-actions.js b/assets/javascripts/discourse/initializers/extend-composer-actions.js
index 649d99ca..aa82c2ff 100644
--- a/assets/javascripts/discourse/initializers/extend-composer-actions.js
+++ b/assets/javascripts/discourse/initializers/extend-composer-actions.js
@@ -1,6 +1,7 @@
 import I18n from "I18n";
 import { withPluginApi } from "discourse/lib/plugin-api";
 import { CREATE_TOPIC } from "discourse/models/composer";
+import { observes } from "discourse-common/utils/decorators";
 
 export default {
   name: "extend-composer-actions",
@@ -75,6 +76,21 @@ export default {
           return [];
         }
       });
+
+      api.modifyClass("model:composer", {
+        pluginId: "discourse-question-answer",
+
+        @observes("categoryId")
+        categoryCreateAsQADefault() {
+          const createAsQA = this.category?.create_as_qa_default;
+
+          if (this.creatingTopic && createAsQA !== this.createAsQA) {
+            this.set("createAsQA", createAsQA);
+            this.notifyPropertyChange("replyOptions");
+            this.notifyPropertyChange("action");
+          }
+        },
+      });
     });
   },
 };
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index 10ca599a..dcf5a75f 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -6,6 +6,11 @@ en:
         question_answer_user_commented: "new comment"
       popup:
         question_answer_user_commented: '%{username} commented in "%{topic}" - %{site_title}'
+
+    category:
+      qa_settings_heading: Question Answer
+      create_as_qa_default: New topics default to Q&A in this category.
+
     composer:
       create_qa:
         label: "Create Q&A topic"
diff --git a/lib/question_answer/engine.rb b/lib/question_answer/engine.rb
index 40e0ba37..fe4b5824 100644
--- a/lib/question_answer/engine.rb
+++ b/lib/question_answer/engine.rb
@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 module ::QuestionAnswer
+  CREATE_AS_QA_DEFAULT = "create_as_qa_default"
+
   class Engine < Rails::Engine
     engine_name 'question_answer'
     isolate_namespace QuestionAnswer
diff --git a/plugin.rb b/plugin.rb
index ccd8eb27..eae62df0 100644
--- a/plugin.rb
+++ b/plugin.rb
@@ -191,4 +191,13 @@
 
     false
   end
+
+  register_category_custom_field_type(QuestionAnswer::CREATE_AS_QA_DEFAULT, :boolean)
+  if Site.respond_to? :preloaded_category_custom_fields
+    Site.preloaded_category_custom_fields << QuestionAnswer::CREATE_AS_QA_DEFAULT
+  end
+  add_to_class(:category, :create_as_qa_default) do
+    ActiveModel::Type::Boolean.new.cast(self.custom_fields[QuestionAnswer::CREATE_AS_QA_DEFAULT])
+  end
+  add_to_serializer(:basic_category, :create_as_qa_default) { object.create_as_qa_default }
 end
diff --git a/spec/serializers/question_answer/basic_category_serializer_spec.rb b/spec/serializers/question_answer/basic_category_serializer_spec.rb
new file mode 100644
index 00000000..da0fbb86
--- /dev/null
+++ b/spec/serializers/question_answer/basic_category_serializer_spec.rb
@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe BasicCategorySerializer do
+  fab!(:category) { Fabricate(:category) }
+
+  let(:serialized) do
+    serializer = BasicCategorySerializer.new(category, root: false)
+    serializer.as_json
+  end
+
+  before do
+    category.custom_fields[QuestionAnswer::CREATE_AS_QA_DEFAULT] = true
+    category.save_custom_fields(true)
+  end
+
+  context 'qa enabled' do
+    before do
+      SiteSetting.qa_enabled = true
+    end
+
+    it 'should return qa category attributes' do
+      expect(serialized[:create_as_qa_default]).to eq(true)
+    end
+  end
+
+  context 'qa disabled' do
+    before do
+      SiteSetting.qa_enabled = false
+    end
+
+    it 'should not return qa category attributes' do
+      expect(serialized.key?(:create_as_qa_default)).to eq(false)
+    end
+  end
+end
diff --git a/test/javascripts/acceptance/composer-test.js b/test/javascripts/acceptance/composer-test.js
index a1111120..5f069211 100644
--- a/test/javascripts/acceptance/composer-test.js
+++ b/test/javascripts/acceptance/composer-test.js
@@ -4,6 +4,7 @@ import selectKit from "discourse/tests/helpers/select-kit-helper";
 import { test } from "qunit";
 import I18n from "I18n";
 import { parsePostData } from "discourse/tests/helpers/create-pretender";
+import Category from "discourse/models/category";
 
 let createAsQASetInRequest = false;
 
@@ -76,4 +77,25 @@ acceptance("Discourse Question Answer - composer", function (needs) {
       "submits the right request to create topic as Q&A formatted"
     );
   });
+
+  test("Creating new topic in category with Q&A create default", async function (assert) {
+    Category.findById(2).set("create_as_qa_default", true);
+
+    await visit("/");
+    await click("#create-topic");
+
+    assert.strictEqual(
+      query(".action-title").innerText.trim(),
+      I18n.t("topic.create_long")
+    );
+
+    const categoryChooser = selectKit(".category-chooser");
+    await categoryChooser.expand();
+    await categoryChooser.selectRowByValue(2);
+
+    assert.strictEqual(
+      query(".action-title").innerText.trim(),
+      I18n.t("composer.create_qa.label")
+    );
+  });
 });