diff --git a/app/helpers/issues_helper.rb b/app/helpers/issues_helper.rb
index b8e1dd4140..daa7bc5c71 100644
--- a/app/helpers/issues_helper.rb
+++ b/app/helpers/issues_helper.rb
@@ -276,6 +276,16 @@ module IssuesHelper
     end
   end
 
+  def issue_spent_time_ratio_details(issue)
+    if issue.total_spent_time_ratio
+      if issue.total_spent_time_ratio == issue.spent_time_ratio
+        "#{issue.spent_time_ratio.to_s(:percentage, precision: 2)}"
+      else
+        "#{issue.spent_time_ratio.to_s(:percentage, precision: 2)} (#{l(:label_total)}: #{issue.total_spent_time_ratio.to_s(:percentage, precision: 2)})"
+      end
+    end
+  end
+
   def issue_due_date_details(issue)
     return if issue&.due_date.nil?
 
diff --git a/app/helpers/queries_helper.rb b/app/helpers/queries_helper.rb
index 9b223f84a7..967b45a907 100644
--- a/app/helpers/queries_helper.rb
+++ b/app/helpers/queries_helper.rb
@@ -260,6 +260,8 @@ module QueriesHelper
         item.last_notes.present? ? content_tag('div', textilizable(item, :last_notes), :class => "wiki") : ''
       when :done_ratio
         progress_bar(value)
+      when :spent_time_ratio, :total_spent_time_ratio
+        value ? value.to_s(:percentage, precision: 2) : ''
       when :relations
         content_tag(
           'span',
diff --git a/app/models/issue.rb b/app/models/issue.rb
index 7ce04ad64b..4eff0331ff 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -733,6 +733,18 @@ class Issue < ActiveRecord::Base
     end
   end
 
+  def spent_time_ratio
+    if estimated_hours.to_f > 0
+      (spent_hours.to_f / estimated_hours.to_f * 100).round(2)
+    end
+  end
+
+  def total_spent_time_ratio
+    if total_estimated_hours.to_f > 0
+      (total_spent_hours.to_f / total_estimated_hours.to_f * 100).round(2)
+    end
+  end
+
   def self.use_status_for_done_ratio?
     Setting.issue_done_ratio == 'issue_status'
   end
diff --git a/app/models/issue_query.rb b/app/models/issue_query.rb
index efd0ad0f1d..84d4148f66 100644
--- a/app/models/issue_query.rb
+++ b/app/models/issue_query.rb
@@ -61,6 +61,35 @@ class IssueQuery < Query
         end,
       :default_order => 'desc'),
     QueryColumn.new(:done_ratio, :sortable => "#{Issue.table_name}.done_ratio", :groupable => true),
+    QueryColumn.new(
+      :spent_time_ratio,
+      :sortable =>
+        lambda do
+          "COALESCE((" \
+          " SELECT ROUND(CAST(COALESCE(SUM(hours), 0) / NULLIF(#{Issue.table_name}.estimated_hours, 0) * 100 AS DECIMAL(4,2)), 2) " \
+          " FROM #{TimeEntry.table_name}" \
+          " WHERE issue_id = #{Issue.table_name}.id), NULL)"
+        end,
+      :default_order => 'desc'),
+    QueryColumn.new(
+      :total_spent_time_ratio,
+      :sortable =>
+        lambda do
+          "COALESCE(ROUND(CAST(" \
+            "COALESCE((SELECT SUM(hours)" \
+              " FROM #{TimeEntry.table_name}" \
+              " JOIN #{Project.table_name} ON #{Project.table_name}.id = #{TimeEntry.table_name}.project_id" \
+              " JOIN #{Issue.table_name} subtasks ON subtasks.id = #{TimeEntry.table_name}.issue_id" \
+              " WHERE (#{TimeEntry.visible_condition(User.current)})" \
+              " AND subtasks.root_id = #{Issue.table_name}.root_id AND subtasks.lft >= #{Issue.table_name}.lft AND subtasks.rgt <= #{Issue.table_name}.rgt), 0)" \
+            " / " \
+            "NULLIF((SELECT SUM(estimated_hours)" \
+              " FROM #{Issue.table_name} subtasks" \
+              " WHERE #{Issue.visible_condition(User.current).gsub(/\bissues\b/, 'subtasks')}" \
+              " AND subtasks.root_id = #{Issue.table_name}.root_id AND subtasks.lft >= #{Issue.table_name}.lft AND subtasks.rgt <= #{Issue.table_name}.rgt), 0)" \
+            "* 100 AS DECIMAL(4,2)), 2), NULL)"
+        end,
+      :default_order => 'desc'),
     TimestampQueryColumn.new(:created_on, :sortable => "#{Issue.table_name}.created_on",
                              :default_order => 'desc', :groupable => true),
     TimestampQueryColumn.new(:closed_on, :sortable => "#{Issue.table_name}.closed_on",
@@ -203,6 +232,8 @@ class IssueQuery < Query
     end
 
     add_available_filter "done_ratio", :type => :integer
+    add_available_filter "spent_time_ratio", :type => :float
+    add_available_filter "total_spent_time_ratio", :type => :float
 
     if User.current.allowed_to?(:set_issues_private, nil, :global => true) ||
       User.current.allowed_to?(:set_own_issues_private, nil, :global => true)
@@ -508,6 +539,49 @@ class IssueQuery < Query
       "WHERE issue_id = #{Issue.table_name}.id), 0) #{sql_op}"
   end
 
+  def sql_for_spent_time_ratio_field(field, operator, value)
+    first, second = value.first.to_f, value.second.to_f
+    sql_op =
+      case operator
+      when "=", ">=", "<=" then  "#{operator} #{first}"
+      when "><"            then  "BETWEEN #{first} AND #{second}"
+      when "*"             then  ">= 0"
+      when "!*"            then  "IS NULL"
+      else
+        return nil
+      end
+    "COALESCE((" +
+      "SELECT ROUND(CAST(COALESCE(SUM(hours), 0) / NULLIF(#{Issue.table_name}.estimated_hours, 0) * 100 AS DECIMAL(4,2)), 2) " +
+      "FROM #{TimeEntry.table_name} " +
+      "WHERE issue_id = #{Issue.table_name}.id), NULL) #{sql_op}"
+  end
+
+  def sql_for_total_spent_time_ratio_field(field, operator, value)
+    first, second = value.first.to_f, value.second.to_f
+    sql_op =
+      case operator
+      when "=", ">=", "<=" then  "#{operator} #{first}"
+      when "><"            then  "BETWEEN #{first} AND #{second}"
+      when "*"             then  ">= 0"
+      when "!*"            then  "IS NULL"
+      else
+        return nil
+      end
+    "COALESCE(ROUND(CAST(" +
+      "COALESCE((SELECT SUM(hours)" +
+        " FROM #{TimeEntry.table_name}" +
+        " JOIN #{Project.table_name} ON #{Project.table_name}.id = #{TimeEntry.table_name}.project_id" +
+        " JOIN #{Issue.table_name} subtasks ON subtasks.id = #{TimeEntry.table_name}.issue_id" +
+        " WHERE (#{TimeEntry.visible_condition(User.current)})" +
+        " AND subtasks.root_id = #{Issue.table_name}.root_id AND subtasks.lft >= #{Issue.table_name}.lft AND subtasks.rgt <= #{Issue.table_name}.rgt), 0)" +
+      " / " +
+      "NULLIF((SELECT SUM(estimated_hours)" +
+        " FROM #{Issue.table_name} subtasks" +
+        " WHERE #{Issue.visible_condition(User.current).gsub(/\bissues\b/, 'subtasks')}" +
+        " AND subtasks.root_id = #{Issue.table_name}.root_id AND subtasks.lft >= #{Issue.table_name}.lft AND subtasks.rgt <= #{Issue.table_name}.rgt), 0)" +
+      " * 100 AS DECIMAL(4,2)), 2), NULL) #{sql_op}"
+  end
+
   def sql_for_watcher_id_field(field, operator, value)
     db_table = Watcher.table_name
     me, others = value.partition {|id| ['0', User.current.id.to_s].include?(id)}
diff --git a/app/views/issues/show.html.erb b/app/views/issues/show.html.erb
index 6b84bdfb3d..1bf7ef2ff4 100644
--- a/app/views/issues/show.html.erb
+++ b/app/views/issues/show.html.erb
@@ -73,6 +73,9 @@
   end
   if User.current.allowed_to?(:view_time_entries, @project) && @issue.total_spent_hours > 0
     rows.right l(:label_spent_time), issue_spent_hours_details(@issue), :class => 'spent-time'
+    if @issue.total_spent_time_ratio.present?
+      rows.right l(:field_spent_time_ratio), issue_spent_time_ratio_details(@issue), :class => 'spent-time'
+    end
   end
 end %>
 <%= render_half_width_custom_fields_rows(@issue) %>
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 90eff9ad34..31e2f92ea2 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -338,6 +338,8 @@ en:
   field_onthefly: On-the-fly user creation
   field_start_date: Start date
   field_done_ratio: "% Done"
+  field_spent_time_ratio: Spent Time Ratio
+  field_total_spent_time_ratio: Total spent time Ratio
   field_auth_source: Authentication mode
   field_hide_mail: Hide my email address
   field_comments: Comment