diff --git a/app/assets/javascripts/admin/enterprises/directives/invert_number.js.coffee b/app/assets/javascripts/admin/enterprises/directives/invert_number.js.coffee
new file mode 100644
index 0000000000..0557d3ed22
--- /dev/null
+++ b/app/assets/javascripts/admin/enterprises/directives/invert_number.js.coffee
@@ -0,0 +1,11 @@
+angular.module("admin.enterprises").directive "invertNumber", ->
+  restrict: "A"
+  require: "ngModel"
+  link: (scope, element, attrs, ngModel) ->
+    ngModel.$parsers.push (viewValue) ->
+      return -parseInt(viewValue) unless isNaN(parseInt(viewValue))
+      viewValue
+
+    ngModel.$formatters.push (modelValue) ->
+      return -parseInt(modelValue) unless isNaN(parseInt(modelValue))
+      modelValue
diff --git a/app/assets/javascripts/templates/admin/tag_rules/discount_order.html.haml b/app/assets/javascripts/templates/admin/tag_rules/discount_order.html.haml
index bc2ddc5c75..90886b2dab 100644
--- a/app/assets/javascripts/templates/admin/tag_rules/discount_order.html.haml
+++ b/app/assets/javascripts/templates/admin/tag_rules/discount_order.html.haml
@@ -24,13 +24,16 @@
     name: "enterprise[tag_rules_attributes][{{tagGroup.startIndex + $index}}][calculator_attributes][id]",
     ng: { value: "rule.calculator.id" } }
 
+  %input{ type: "hidden",
+    name: "enterprise[tag_rules_attributes][{{tagGroup.startIndex + $index}}][calculator_attributes][preferred_flat_percent]",
+    ng: { value: "rule.calculator.preferred_flat_percent" } }
+
   %span.text-normal {{ $index + 1 }}. Apply a discount of
   %span.input-symbol.after
     %span.text-normal %
     %input.text-big{ type: "number",
       id: "enterprise_tag_rules_attributes_{{tagGroup.startIndex + $index}}_calculator_attributes_preferred_flat_percent",
-      name: "enterprise[tag_rules_attributes][{{tagGroup.startIndex + $index}}][calculator_attributes][preferred_flat_percent]",
-      min: 0,
+      min: -100,
       max: 100,
-      ng: { model: "rule.calculator.preferred_flat_percent" } }
+      ng: { model: "rule.calculator.preferred_flat_percent" }, 'invert-number' => true }
   %span.text-normal to order subtotals
diff --git a/app/models/spree/order_decorator.rb b/app/models/spree/order_decorator.rb
index 8f1c0381b1..5fc96c34c2 100644
--- a/app/models/spree/order_decorator.rb
+++ b/app/models/spree/order_decorator.rb
@@ -17,7 +17,8 @@ Spree::Order.class_eval do
   attr_accessible :order_cycle_id, :distributor_id
 
   before_validation :shipping_address_from_distributor
-  before_validation :associate_customer, unless: :customer_is_valid?
+  before_validation :associate_customer, unless: :customer_id?
+  before_validation :ensure_customer, unless: :customer_is_valid?
 
   checkout_flow do
     go_to_state :address
@@ -179,6 +180,10 @@ Spree::Order.class_eval do
       if order_cycle
         OpenFoodNetwork::EnterpriseFeeCalculator.new.create_order_adjustments_for self
       end
+
+      if distributor.present? && customer.present?
+        distributor.apply_tag_rules_to(self, customer: customer)
+      end
     end
   end
 
@@ -289,14 +294,18 @@ Spree::Order.class_eval do
     customer.present? && customer.enterprise_id == distributor_id && customer.email == (user.andand.email || email)
   end
 
+  def email_for_customer
+    user.andand.email || email
+  end
+
   def associate_customer
-    email_for_customer = user.andand.email || email
-    existing_customer = Customer.of(distributor).find_by_email(email_for_customer)
-    if existing_customer
-      self.customer = existing_customer
-    else
-      new_customer = Customer.create(enterprise: distributor, email: email_for_customer, user: user)
-      self.customer = new_customer
+    return customer if customer.present?
+    self.customer = Customer.of(distributor).find_by_email(email_for_customer)
+  end
+
+  def ensure_customer
+    unless associate_customer
+      self.customer = Customer.create(enterprise: distributor, email: email_for_customer, user: user)
     end
   end
 end
diff --git a/app/models/tag_rule.rb b/app/models/tag_rule.rb
index cf0a105e80..0237b74eb2 100644
--- a/app/models/tag_rule.rb
+++ b/app/models/tag_rule.rb
@@ -31,6 +31,7 @@ class TagRule < ActiveRecord::Base
 
   def customer_tags_match?
     context_customer_tags = context.andand[:customer].andand.tag_list || []
-    ( context_customer_tags & preferred_customer_tags.split(",") ).any?
+    preferred_tags = preferred_customer_tags.split(",")
+    ( context_customer_tags & preferred_tags ).any?
   end
 end
diff --git a/app/models/tag_rule/discount_order.rb b/app/models/tag_rule/discount_order.rb
index 1ee9b4263a..c1e440760a 100644
--- a/app/models/tag_rule/discount_order.rb
+++ b/app/models/tag_rule/discount_order.rb
@@ -5,9 +5,7 @@ class TagRule::DiscountOrder < TagRule
 
   # Warning: this should only EVER be called via TagRule#apply
   def apply!
-    percentage = "%.2f" % (calculator.preferred_flat_percent * -1)
-    label = I18n.t("tag_rules.discount_order.label", percentage: percentage)
-    create_adjustment(label, subject, subject)
+    create_adjustment(I18n.t("tag_rules.discount_order.discount"), subject, subject)
   end
 
   def subject_class
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 7892ecdce1..4a9d8fe546 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -140,7 +140,7 @@ en:
   # Tag Rules
   tag_rules:
     discount_order:
-      label: "%{percentage}% discount"
+      discount: "Discount"
 
   logo: "Logo (640x130)" #FIXME
   logo_mobile: "Mobile logo (75x26)" #FIXME
diff --git a/spec/features/admin/enterprises_spec.rb b/spec/features/admin/enterprises_spec.rb
index cc923cd89e..a39a3b8acb 100644
--- a/spec/features/admin/enterprises_spec.rb
+++ b/spec/features/admin/enterprises_spec.rb
@@ -301,13 +301,13 @@ feature %q{
 
         expect(page).to have_content 'No rules apply to this tag yet'
         click_button '+ Add A New Rule'
-        fill_in "enterprise[tag_rules_attributes][0][calculator_attributes][preferred_flat_percent]", with: 22
+        fill_in "enterprise_tag_rules_attributes_0_calculator_attributes_preferred_flat_percent", with: 22
 
         click_button 'Update'
 
         tag_rule = TagRule::DiscountOrder.last
         expect(tag_rule.preferred_customer_tags).to eq "volunteer"
-        expect(tag_rule.calculator.preferred_flat_percent).to eq 22
+        expect(tag_rule.calculator.preferred_flat_percent).to eq -22
       end
     end
 
@@ -325,13 +325,13 @@ feature %q{
         expect(first('.customer_tag .header')).to have_content "For customers tagged:"
         expect(first('tags-input .tag-list ti-tag-item')).to have_content "member"
         find(:css, "tags-input .tags input").set "volunteer\n"
-        expect(page).to have_input "enterprise[tag_rules_attributes][0][calculator_attributes][preferred_flat_percent]", with: "0"
-        fill_in "enterprise[tag_rules_attributes][0][calculator_attributes][preferred_flat_percent]", with: 45
+        expect(page).to have_field "enterprise_tag_rules_attributes_0_calculator_attributes_preferred_flat_percent", with: '0'
+        fill_in "enterprise_tag_rules_attributes_0_calculator_attributes_preferred_flat_percent", with: 45
 
         click_button 'Update'
 
         expect(tag_rule.preferred_customer_tags).to eq "member,volunteer"
-        expect(tag_rule.calculator.preferred_flat_percent).to eq 45
+        expect(tag_rule.calculator.preferred_flat_percent).to eq -45
       end
     end
 
diff --git a/spec/models/spree/order_spec.rb b/spec/models/spree/order_spec.rb
index 4d681e01cc..e72fc7a1c4 100644
--- a/spec/models/spree/order_spec.rb
+++ b/spec/models/spree/order_spec.rb
@@ -108,44 +108,76 @@ describe Spree::Order do
       subject.update_distribution_charge!
     end
 
-    describe "looking up whether a line item can be provided by an order cycle" do
-      it "returns true when the variant is provided" do
-        v = double(:variant)
-        line_item = double(:line_item, variant: v)
-        order_cycle = double(:order_cycle, variants: [v])
-        subject.stub(:order_cycle) { order_cycle }
+    context "appying tag rules" do
+      let(:enterprise) { create(:distributor_enterprise) }
+      let(:customer) { create(:customer, enterprise: enterprise, tag_list: "tagtagtag") }
+      let(:tag_rule) { create(:tag_rule, enterprise: enterprise, preferred_customer_tags: "tagtagtag") }
+      let(:order) { create(:order_with_totals_and_distribution, distributor: enterprise, customer: customer) }
 
-        subject.send(:provided_by_order_cycle?, line_item).should be_true
+      before do
+        tag_rule.calculator.update_attribute(:preferred_flat_percent, -10)
       end
 
-      it "returns false otherwise" do
-        v = double(:variant)
-        line_item = double(:line_item, variant: v)
-        order_cycle = double(:order_cycle, variants: [])
-        subject.stub(:order_cycle) { order_cycle }
-
-        subject.send(:provided_by_order_cycle?, line_item).should be_false
+      context "when the rule applies" do
+        it "applies the rule" do
+          order.update_distribution_charge!
+          order.reload
+          discount = order.adjustments.find_by_label("Discount")
+          expect(discount).to be_a Spree::Adjustment
+          expect(discount.amount).to eq (order.item_total / -10).round(2)
+        end
       end
 
-      it "returns false when there is no order cycle" do
-        v = double(:variant)
-        line_item = double(:line_item, variant: v)
-        subject.stub(:order_cycle) { nil }
+      context "when the rule does not apply" do
+        before { tag_rule.update_attribute(:preferred_customer_tags, "tagtag") }
 
-        subject.send(:provided_by_order_cycle?, line_item).should be_false
+        it "does not apply the rule" do
+          order.update_distribution_charge!
+          order.reload
+          discount = order.adjustments.find_by_label("Discount")
+          expect(discount).to be_nil
+        end
       end
     end
+  end
 
-    it "looks up product distribution enterprise fees for a line item" do
-      product = double(:product)
-      variant = double(:variant, product: product)
-      line_item = double(:line_item, variant: variant)
+  describe "looking up whether a line item can be provided by an order cycle" do
+    it "returns true when the variant is provided" do
+      v = double(:variant)
+      line_item = double(:line_item, variant: v)
+      order_cycle = double(:order_cycle, variants: [v])
+      subject.stub(:order_cycle) { order_cycle }
 
-      product_distribution = double(:product_distribution)
-      product.should_receive(:product_distribution_for).with(subject.distributor) { product_distribution }
-
-      subject.send(:product_distribution_for, line_item).should == product_distribution
+      subject.send(:provided_by_order_cycle?, line_item).should be_true
     end
+
+    it "returns false otherwise" do
+      v = double(:variant)
+      line_item = double(:line_item, variant: v)
+      order_cycle = double(:order_cycle, variants: [])
+      subject.stub(:order_cycle) { order_cycle }
+
+      subject.send(:provided_by_order_cycle?, line_item).should be_false
+    end
+
+    it "returns false when there is no order cycle" do
+      v = double(:variant)
+      line_item = double(:line_item, variant: v)
+      subject.stub(:order_cycle) { nil }
+
+      subject.send(:provided_by_order_cycle?, line_item).should be_false
+    end
+  end
+
+  it "looks up product distribution enterprise fees for a line item" do
+    product = double(:product)
+    variant = double(:variant, product: product)
+    line_item = double(:line_item, variant: variant)
+
+    product_distribution = double(:product_distribution)
+    product.should_receive(:product_distribution_for).with(subject.distributor) { product_distribution }
+
+    subject.send(:product_distribution_for, line_item).should == product_distribution
   end
 
   describe "getting the admin and handling charge" do
@@ -559,39 +591,76 @@ describe Spree::Order do
   end
 
   describe "associating a customer" do
-    let(:user) { create(:user) }
     let(:distributor) { create(:distributor_enterprise) }
+    let!(:order) { create(:order, distributor: distributor) }
 
-    context "when a user has been set on the order" do
-      let!(:order) { create(:order, distributor: distributor, user: user) }
-      context "and a customer for order.distributor and order.user.email already exists" do
-        let!(:customer) { create(:customer, enterprise: distributor, email: user.email) }
-        it "associates the order with the existing customer" do
-          order.send(:associate_customer)
+    context "when an email address is available for the order" do
+      before { allow(order).to receive(:email_for_customer) { "existing@email.com" }}
+
+      context "and a customer for order.distributor and order#email_for_customer already exists" do
+        let!(:customer) { create(:customer, enterprise: distributor, email: "existing@email.com" ) }
+
+        it "associates the order with the existing customer, and returns the customer" do
+          result = order.send(:associate_customer)
           expect(order.customer).to eq customer
+          expect(result).to eq customer
         end
       end
+
       context "and a customer for order.distributor and order.user.email does not alread exist" do
         let!(:customer) { create(:customer, enterprise: distributor, email: 'some-other-email@email.com') }
-        it "creates a new customer" do
-          expect{order.send(:associate_customer)}.to change{Customer.count}.by 1
+
+        it "does not set the customer and returns nil" do
+          result = order.send(:associate_customer)
+          expect(order.customer).to be_nil
+          expect(result).to be_nil
         end
       end
     end
 
-    context "when a user has not been set on the order" do
-      let!(:order) { create(:order, distributor: distributor, user: nil) }
-      context "and a customer for order.distributor and order.email already exists" do
-        let!(:customer) { create(:customer, enterprise: distributor, email: order.email) }
-        it "creates a new customer" do
-          order.send(:associate_customer)
+    context "when an email address is not available for the order" do
+      let!(:customer) { create(:customer, enterprise: distributor) }
+      before { allow(order).to receive(:email_for_customer) { nil }}
+
+      it "does not set the customer and returns nil" do
+        result = order.send(:associate_customer)
+        expect(order.customer).to be_nil
+        expect(result).to be_nil
+      end
+    end
+  end
+
+  describe "ensuring a customer is linked" do
+    let(:distributor) { create(:distributor_enterprise) }
+    let!(:order) { create(:order, distributor: distributor) }
+
+    context "when a customer has already been linked to the order" do
+      let!(:customer) { create(:customer, enterprise: distributor, email: "existing@email.com" ) }
+      before { order.update_attribute(:customer_id, customer.id) }
+
+      it "does nothing" do
+        order.send(:ensure_customer)
+        expect(order.customer).to eq customer
+      end
+    end
+
+    context "when a customer not been linked to the order" do
+      context "but one matching order#email_for_customer already exists" do
+        let!(:customer) { create(:customer, enterprise: distributor, email: 'some-other-email@email.com') }
+        before { allow(order).to receive(:email_for_customer) { 'some-other-email@email.com' } }
+
+        it "links the customer customer to the order" do
+          expect(order.customer).to be_nil
+          expect{order.send(:ensure_customer)}.to_not change{Customer.count}
           expect(order.customer).to eq customer
         end
       end
-      context "and a customer for order.distributor and order.email does not alread exist" do
-        let!(:customer) { create(:customer, enterprise: distributor, email: 'some-other-email@email.com') }
+
+      context "and order#email_for_customer does not match any existing customers" do
         it "creates a new customer" do
-          expect{order.send(:associate_customer)}.to change{Customer.count}.by 1
+          expect(order.customer).to be_nil
+          expect{order.send(:ensure_customer)}.to change{Customer.count}.by 1
+          expect(order.customer).to be_a Customer
         end
       end
     end
diff --git a/spec/models/tag_rule/discount_order_spec.rb b/spec/models/tag_rule/discount_order_spec.rb
index 32f2de8874..dab901dfbf 100644
--- a/spec/models/tag_rule/discount_order_spec.rb
+++ b/spec/models/tag_rule/discount_order_spec.rb
@@ -66,7 +66,7 @@ describe TagRule::DiscountOrder, type: :model do
         tag_rule.send(:apply!)
         expect(adjustment).to be_a Spree::Adjustment
         expect(adjustment.amount).to eq -10.00
-        expect(adjustment.label).to eq "10.00% discount"
+        expect(adjustment.label).to eq "Discount"
         expect(order.adjustment_total).to eq -10.00
         expect(order.total).to eq 90.00
       end
@@ -84,7 +84,7 @@ describe TagRule::DiscountOrder, type: :model do
         tag_rule.send(:apply!)
         expect(adjustment).to be_a Spree::Adjustment
         expect(adjustment.amount).to eq -10.00
-        expect(adjustment.label).to eq "10.00% discount"
+        expect(adjustment.label).to eq "Discount"
         expect(order.adjustment_total).to eq 15.00
         expect(order.total).to eq 115.00
       end