diff --git a/app/controllers/admin/users_controller.rb b/app/controllers/admin/users_controller.rb
index 811d323b2..146a0aecb 100644
--- a/app/controllers/admin/users_controller.rb
+++ b/app/controllers/admin/users_controller.rb
@@ -33,7 +33,7 @@ module Admin
 
     def update
       @user = User.find(params[:id])
-      manage_credits
+      Credits::Manage.call(@user, user_params)
       add_note if user_params[:new_note]
       redirect_to "/admin/users/#{params[:id]}"
     end
@@ -119,13 +119,6 @@ module Admin
 
     private
 
-    def manage_credits
-      add_credits if user_params[:add_credits]
-      add_org_credits if user_params[:add_org_credits]
-      remove_org_credits if user_params[:remove_org_credits]
-      remove_credits if user_params[:remove_credits]
-    end
-
     def add_note
       Note.create(
         author_id: current_user.id,
@@ -136,28 +129,6 @@ module Admin
       )
     end
 
-    def add_credits
-      amount = user_params[:add_credits].to_i
-      Credit.add_to(@user, amount)
-    end
-
-    def remove_credits
-      amount = user_params[:remove_credits].to_i
-      Credit.remove_from(@user, amount)
-    end
-
-    def add_org_credits
-      org = Organization.find(user_params[:organization_id])
-      amount = user_params[:add_org_credits].to_i
-      Credit.add_to(org, amount)
-    end
-
-    def remove_org_credits
-      org = Organization.find(user_params[:organization_id])
-      amount = user_params[:remove_org_credits].to_i
-      Credit.remove_from(org, amount)
-    end
-
     def set_feedback_messages
       @related_reports = FeedbackMessage.where(id: @user.reporter_feedback_messages.ids)
         .or(FeedbackMessage.where(id: @user.affected_feedback_messages.ids))
diff --git a/app/services/credits/manage.rb b/app/services/credits/manage.rb
new file mode 100644
index 000000000..edfb88c59
--- /dev/null
+++ b/app/services/credits/manage.rb
@@ -0,0 +1,60 @@
+module Credits
+  class Manage
+    def self.call(user, user_params)
+      new(
+        user,
+        user_params.slice(:add_credits, :remove_credits),
+        user_params.slice(:organization_id, :add_org_credits, :remove_org_credits),
+      ).call
+    end
+
+    def initialize(user, user_params, org_params)
+      @user = user
+      @user_params = user_params
+      @org_params = org_params
+    end
+
+    def call
+      add_user_credits
+      remove_user_credits
+      add_org_credits
+      remove_org_credits
+    end
+
+    private
+
+    attr_reader :user, :user_params, :org_params
+
+    def add_user_credits
+      return unless user_params[:add_credits]
+
+      amount = user_params[:add_credits].to_i
+      Credit.add_to(user, amount)
+    end
+
+    def remove_user_credits
+      return unless user_params[:remove_credits]
+
+      amount = user_params[:remove_credits].to_i
+      Credit.remove_from(user, amount)
+    end
+
+    def add_org_credits
+      return unless org_params[:add_org_credits]
+
+      amount = org_params[:add_org_credits].to_i
+      Credit.add_to(organization, amount)
+    end
+
+    def remove_org_credits
+      return unless org_params[:remove_org_credits]
+
+      amount = org_params[:remove_org_credits].to_i
+      Credit.remove_from(organization, amount)
+    end
+
+    def organization
+      @organization ||= Organization.find(org_params[:organization_id])
+    end
+  end
+end
diff --git a/spec/services/credits/manage_spec.rb b/spec/services/credits/manage_spec.rb
new file mode 100644
index 000000000..8347e96f2
--- /dev/null
+++ b/spec/services/credits/manage_spec.rb
@@ -0,0 +1,71 @@
+require "rails_helper"
+
+RSpec.describe Credits::Manage, type: :service do
+  describe "When the the service is called" do
+    subject(:invoke_service) { described_class.call(user, user_params) }
+
+    let(:user) { create(:user) }
+    let(:organization) { create(:organization) }
+
+    context "when user add an amount of credits" do
+      let(:user_params) do
+        { add_credits: "4" }
+      end
+
+      it "adds user credits" do
+        expect do
+          invoke_service
+        end.to change { user.reload.credits_count }.by(user_params[:add_credits].to_i)
+      end
+    end
+
+    context "when user removes the proper amount of credits" do
+      let(:user_params) do
+        { remove_credits: "4" }
+      end
+
+      before do
+        Credit.add_to(user, 10)
+      end
+
+      it "removes user credits" do
+        expect do
+          invoke_service
+        end.to change { user.reload.credits_count }.by(user_params[:remove_credits].to_i * -1)
+      end
+    end
+
+    context "when remove the proper amount of credits for organizations" do
+      let(:user_params) do
+        { remove_org_credits: "6", organization_id: organization.id }
+      end
+
+      before do
+        create(:organization_membership, user: user, organization: organization, type_of_user: "admin")
+        Credit.add_to(organization, 10)
+      end
+
+      it "removes org credits" do
+        expect do
+          invoke_service
+        end.to change { organization.reload.credits_count }.by(user_params[:remove_org_credits].to_i * -1)
+      end
+    end
+
+    context "when adds an amount of credits for organizations" do
+      let(:user_params) do
+        { add_org_credits: "7", organization_id: organization.id }
+      end
+
+      before do
+        create(:organization_membership, user: user, organization: organization, type_of_user: "admin")
+      end
+
+      it "adds org credits" do
+        expect do
+          invoke_service
+        end.to change { organization.reload.credits_count }.by(user_params[:add_org_credits].to_i)
+      end
+    end
+  end
+end