diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index cf579627b..1f825ffed 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -14,6 +14,7 @@
 //= require jquery_ujs
 //= require jquery-ui/widgets/datepicker
 //= require jquery-ui/i18n/datepicker-es
+//= require jquery-ui/widgets/autocomplete
 //= require jquery-fileupload/basic
 //= require foundation
 //= require turbolinks
@@ -64,6 +65,7 @@
 //= require documentable
 //= require tree_navigator
 //= require custom
+//= require tag_autocomplete
 
 var initialize_modules = function() {
   App.Comments.initialize();
@@ -98,6 +100,7 @@ var initialize_modules = function() {
   App.WatchFormChanges.initialize();
   App.TreeNavigator.initialize();
   App.Documentable.initialize();
+  App.TagAutocomplete.initialize();
 };
 
 $(function(){
diff --git a/app/assets/javascripts/tag_autocomplete.js.coffee b/app/assets/javascripts/tag_autocomplete.js.coffee
new file mode 100644
index 000000000..be27cd81c
--- /dev/null
+++ b/app/assets/javascripts/tag_autocomplete.js.coffee
@@ -0,0 +1,34 @@
+App.TagAutocomplete =
+
+  split: ( val ) ->
+    return (val.split( /,\s*/ ))
+
+  extractLast: ( term ) ->
+    return (App.TagAutocomplete.split( term ).pop())
+
+  init_autocomplete: ->
+    $('.tag-autocomplete').autocomplete
+      source: (request, response) ->
+        $.ajax
+          url: $('.tag-autocomplete').data('js-url'),
+          data: {search: App.TagAutocomplete.extractLast( request.term )},
+          type: 'GET',
+          dataType: 'json'
+          success: ( data ) ->
+            response( data );
+
+      minLength: 0,
+      search: ->
+        App.TagAutocomplete.extractLast( this.value );
+      focus: ->
+        return false;
+      select: ( event, ui ) -> (
+        terms = App.TagAutocomplete.split( this.value );
+        terms.pop();
+        terms.push( ui.item.value );
+        terms.push( "" );
+        this.value = terms.join( ", " );
+        return false;);
+
+  initialize: ->
+    App.TagAutocomplete.init_autocomplete();
\ No newline at end of file
diff --git a/app/assets/stylesheets/application.scss b/app/assets/stylesheets/application.scss
index 19c73de32..e4dd4ea1c 100644
--- a/app/assets/stylesheets/application.scss
+++ b/app/assets/stylesheets/application.scss
@@ -16,4 +16,6 @@
 @import 'annotator_overrides';
 @import 'jquery-ui/datepicker';
 @import 'datepicker_overrides';
+@import 'jquery-ui/autocomplete';
+@import 'autocomplete_overrides';
 @import 'documentable';
diff --git a/app/assets/stylesheets/autocomplete_overrides.scss b/app/assets/stylesheets/autocomplete_overrides.scss
new file mode 100644
index 000000000..dd2b939ad
--- /dev/null
+++ b/app/assets/stylesheets/autocomplete_overrides.scss
@@ -0,0 +1,40 @@
+// Overrides styles of jquery-ui/autocomplete
+//
+
+/* Autocomplete
+----------------------------------*/
+.ui-autocomplete {
+  position: absolute;
+  cursor: default;
+}
+
+/* workarounds */
+* html .ui-autocomplete {
+  width: 1px;
+} /* without this, the menu expands to 100% in IE6 */
+
+/* Menu
+----------------------------------*/
+.ui-menu {
+  list-style: none;
+  padding: $line-height / 4 $line-height / 3;
+  display: block;
+  background: #fff;
+  border: 1px solid $border;
+  font-size: $small-font-size;
+
+  .ui-menu-item {
+
+    .ui-menu-item-wrapper {
+      padding: $line-height / 4 $line-height / 3;
+      position: relative;
+    }
+
+    .ui-state-hover,
+    .ui-state-active {
+      background: #ececec;
+      border-radius: rem-calc(6);
+    }
+  }
+
+}
diff --git a/app/controllers/tags_controller.rb b/app/controllers/tags_controller.rb
new file mode 100644
index 000000000..c58067048
--- /dev/null
+++ b/app/controllers/tags_controller.rb
@@ -0,0 +1,11 @@
+class TagsController < ApplicationController
+
+  load_and_authorize_resource class: ActsAsTaggableOn::Tag
+  respond_to :json
+
+  def suggest
+    @tags = ActsAsTaggableOn::Tag.search(params[:search]).map(&:name)
+    respond_with @tags
+  end
+
+end
diff --git a/app/models/abilities/common.rb b/app/models/abilities/common.rb
index 620cfb212..0df92616d 100644
--- a/app/models/abilities/common.rb
+++ b/app/models/abilities/common.rb
@@ -24,6 +24,7 @@ module Abilities
 
       can :suggest, Debate
       can :suggest, Proposal
+      can :suggest, ActsAsTaggableOn::Tag
 
       can [:flag, :unflag], Comment
       cannot [:flag, :unflag], Comment, user_id: user.id
diff --git a/app/views/budgets/investments/_form.html.erb b/app/views/budgets/investments/_form.html.erb
index 7cf2bb1e2..8f98b9d5c 100644
--- a/app/views/budgets/investments/_form.html.erb
+++ b/app/views/budgets/investments/_form.html.erb
@@ -49,7 +49,8 @@
                         label: false,
                         placeholder: t("budgets.investments.form.tags_placeholder"),
                         aria: {describedby: "tags-list-help-text"},
-                        class: 'js-tag-list' %>
+                        class: 'js-tag-list tag-autocomplete',
+                        data: {js_url: suggest_tags_path} %>
     </div>
 
 
diff --git a/app/views/debates/_form.html.erb b/app/views/debates/_form.html.erb
index 96a5337ca..a98611011 100644
--- a/app/views/debates/_form.html.erb
+++ b/app/views/debates/_form.html.erb
@@ -22,7 +22,9 @@
       <%= f.text_field :tag_list, value: @debate.tag_list.to_s,
                         label: false,
                         placeholder: t("debates.form.tags_placeholder"),
-                        aria: {describedby: "tag-list-help-text"} %>
+                        aria: {describedby: "tag-list-help-text"},
+                        data: {js_url: suggest_tags_path},
+                        class: 'tag-autocomplete'%>
     </div>
     <div class="small-12 column">
       <% if @debate.new_record? %>
diff --git a/app/views/proposals/_form.html.erb b/app/views/proposals/_form.html.erb
index 73b39dfdb..b46dbc69e 100644
--- a/app/views/proposals/_form.html.erb
+++ b/app/views/proposals/_form.html.erb
@@ -70,8 +70,9 @@
       <%= f.text_field :tag_list, value: @proposal.tag_list.to_s,
                         label: false,
                         placeholder: t("proposals.form.tags_placeholder"),
-                        class: 'js-tag-list',
-                        aria: {describedby: "tag-list-help-text"} %>
+                        class: 'js-tag-list tag-autocomplete',
+                        aria: {describedby: "tag-list-help-text"},
+                        data: {js_url: suggest_tags_path} %>
     </div>
 
     <% if current_user.unverified? %>
diff --git a/config/initializers/acts_as_taggable_on.rb b/config/initializers/acts_as_taggable_on.rb
index 57766c8c9..018319442 100644
--- a/config/initializers/acts_as_taggable_on.rb
+++ b/config/initializers/acts_as_taggable_on.rb
@@ -43,6 +43,18 @@ module ActsAsTaggableOn
             Tagging.public_for_api.pluck('DISTINCT taggings.tag_id'))
     end
 
+    include PgSearch
+
+    pg_search_scope :pg_search, against: :name,
+                                using: {
+                                  tsearch: {prefix: true}
+                                },
+                                ignoring: :accents
+
+    def self.search(term)
+      pg_search(term)
+    end
+
     def increment_custom_counter_for(taggable_type)
       Tag.increment_counter(custom_counter_field_name_for(taggable_type), id)
     end
@@ -78,6 +90,7 @@ module ActsAsTaggableOn
     end
 
     private
+
       def custom_counter_field_name_for(taggable_type)
         "#{taggable_type.underscore.pluralize}_count"
       end
diff --git a/config/routes.rb b/config/routes.rb
index a02384ced..7b1c1cac0 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -6,17 +6,17 @@ Rails.application.routes.draw do
   end
 
   devise_for :users, controllers: {
-                       registrations: 'users/registrations',
-                       sessions: 'users/sessions',
-                       confirmations: 'users/confirmations',
-                       omniauth_callbacks: 'users/omniauth_callbacks'
-                     }
+    registrations: 'users/registrations',
+    sessions: 'users/sessions',
+    confirmations: 'users/confirmations',
+    omniauth_callbacks: 'users/omniauth_callbacks'
+  }
   devise_for :organizations, class_name: 'User',
-             controllers: {
-               registrations: 'organizations/registrations',
-               sessions: 'devise/sessions',
-             },
-             skip: [:omniauth_callbacks]
+                             controllers: {
+                               registrations: 'organizations/registrations',
+                               sessions: 'devise/sessions'
+                             },
+                             skip: [:omniauth_callbacks]
 
   devise_scope :organization do
     get 'organizations/sign_up/success', to: 'organizations/registrations#success'
@@ -168,6 +168,11 @@ Rails.application.routes.draw do
     resource :letter, controller: "letter", only: [:new, :create, :show, :edit, :update]
   end
 
+  resources :tags do
+    collection do
+      get :suggest
+    end
+  end
 
   namespace :admin do
     root to: "dashboard#index"
@@ -431,9 +436,7 @@ Rails.application.routes.draw do
   get '/graphql', to: 'graphql#query'
   post '/graphql', to: 'graphql#query'
 
-  if Rails.env.development?
-    mount LetterOpenerWeb::Engine, at: "/letter_opener"
-  end
+  mount LetterOpenerWeb::Engine, at: "/letter_opener" if Rails.env.development?
 
   mount GraphiQL::Rails::Engine, at: '/graphiql', graphql_path: '/graphql'
 
diff --git a/spec/lib/acts_as_taggable_on_spec.rb b/spec/lib/acts_as_taggable_on_spec.rb
index 761e90553..de53b35e7 100644
--- a/spec/lib/acts_as_taggable_on_spec.rb
+++ b/spec/lib/acts_as_taggable_on_spec.rb
@@ -133,6 +133,21 @@ describe 'ActsAsTaggableOn' do
         expect(ActsAsTaggableOn::Tag.public_for_api).to be_empty
       end
     end
+
+    describe "search" do
+      it "containing the word in the name" do
+        create(:tag, name: 'Familia')
+        create(:tag, name: 'Cultura')
+        create(:tag, name: 'Salud')
+        create(:tag, name: 'Famosos')
+
+        expect(ActsAsTaggableOn::Tag.pg_search('f').length).to eq(2)
+        expect(ActsAsTaggableOn::Tag.search('cultura').first.name).to eq('Cultura')
+        expect(ActsAsTaggableOn::Tag.search('sal').first.name).to eq('Salud')
+        expect(ActsAsTaggableOn::Tag.search('fami').first.name).to eq('Familia')
+      end
+    end
+
   end
 
 end