diff --git a/app/models/contract.rb b/app/models/contract.rb
index 2e60679..f5bacd6 100644
--- a/app/models/contract.rb
+++ b/app/models/contract.rb
@@ -41,8 +41,7 @@ class Contract < ActiveRecord::Base
   [:labor_spent,
    :overhead_spent,
    :total_spent,
-   :profit_spent,
-   :estimated_hour_spent
+   :profit_spent
   ].each do |mthd|
     define_method(mthd) { "TODO" }
   end
@@ -62,6 +61,11 @@ class Contract < ActiveRecord::Base
     deliverables.inject(0) {|total, deliverable| total += deliverable.estimated_hour_budget_total }
   end
 
+  # OPTIMIZE: N+1
+  def estimated_hour_spent
+    deliverables.inject(0) {|total, deliverable| total += deliverable.hours_spent_total }
+  end
+
   # OPTIMIZE: N+1
   def total_budget
     deliverables.inject(0) {|total, deliverable| total += deliverable.total }
diff --git a/app/models/deliverable.rb b/app/models/deliverable.rb
index 72cc848..88140b5 100644
--- a/app/models/deliverable.rb
+++ b/app/models/deliverable.rb
@@ -48,6 +48,11 @@ class Deliverable < ActiveRecord::Base
       (overhead_budgets.sum(:hours) || 0.0)
   end
 
+  # OPTIMIZE: N+1
+  def hours_spent_total
+    issues.inject(0) {|total, issue| total += issue.spent_hours }
+  end
+
   if Rails.env.test?
     generator_for :title, :method => :next_title
 
diff --git a/test/unit/contract_test.rb b/test/unit/contract_test.rb
index 9d5a982..48b857b 100644
--- a/test/unit/contract_test.rb
+++ b/test/unit/contract_test.rb
@@ -69,6 +69,26 @@ class ContractTest < ActiveSupport::TestCase
     end
   end
 
+  context "#estimated_hour_spent" do
+    should "sum all of the hours spent on the Deliverables" do
+      @project = Project.generate!
+      contract = Contract.generate!
+      contract.deliverables << @deliverable_1 = FixedDeliverable.generate!
+      @deliverable_1.issues << @issue1 = Issue.generate_for_project!(@project)
+      @deliverable_1.issues << @issue2 = Issue.generate_for_project!(@project)
+      TimeEntry.generate!(:hours => 10, :issue => @issue1, :project => @project)
+      TimeEntry.generate!(:hours => 10, :issue => @issue2, :project => @project)
+
+      contract.deliverables << @deliverable_2 = HourlyDeliverable.generate!
+      @deliverable_2.issues << @issue3 = Issue.generate_for_project!(@project)
+      @deliverable_2.issues << @issue4 = Issue.generate_for_project!(@project)
+      TimeEntry.generate!(:hours => 10, :issue => @issue3, :project => @project)
+      TimeEntry.generate!(:hours => 10, :issue => @issue4, :project => @project)
+
+      assert_equal 40, contract.estimated_hour_spent
+    end
+  end
+
   context "#total_budget" do
     should "sum all of the totals of the Deliverables" do
       contract = Contract.generate!(:billable_rate => 100.0)