diff --git a/app/assets/javascripts/controllers/machines.coffee.erb b/app/assets/javascripts/controllers/machines.coffee.erb
index 5d4f9b9b4..83042d7ce 100644
--- a/app/assets/javascripts/controllers/machines.coffee.erb
+++ b/app/assets/javascripts/controllers/machines.coffee.erb
@@ -315,6 +315,9 @@ Application.Controllers.controller "ReserveMachineController", ["$scope", "$stat
   ## total amount of the bill to pay
   $scope.amountTotal = 0
 
+  ## total amount of the elements in the cart, without considering any coupon
+  $scope.totalNoCoupon = 0
+
   ## Discount coupon to apply to the basket, if any
   $scope.coupon =
       applied: null
@@ -661,6 +664,7 @@ Application.Controllers.controller "ReserveMachineController", ["$scope", "$stat
       r = mkReservation($scope.ctrl.member, $scope.eventsReserved, $scope.selectedPlan)
       Price.compute mkRequestParams(r, $scope.coupon.applied), (res) ->
         $scope.amountTotal = res.price
+        $scope.totalNoCoupon = res.price_without_coupon
         setSlotsDetails(res.details)
     else
       # otherwise we alert, this error musn't occur when the current user is not admin
diff --git a/app/assets/javascripts/controllers/trainings.coffee.erb b/app/assets/javascripts/controllers/trainings.coffee.erb
index f9785ed6a..ccb9a65f6 100644
--- a/app/assets/javascripts/controllers/trainings.coffee.erb
+++ b/app/assets/javascripts/controllers/trainings.coffee.erb
@@ -137,6 +137,12 @@ Application.Controllers.controller "ReserveTrainingController", ["$scope", "$sta
   $scope.coupon =
     applied: null
 
+  ## Total price of the cart, that the user will pay
+  $scope.amountTotal = 0
+
+  ## Total amount of the elements in the cart, without considering any coupon
+  $scope.totalNoCoupon = 0
+
   ## fullCalendar (v2) configuration
   $scope.calendarConfig = CalendarConfig
     minTime: moment.duration(moment(settingsPromise.booking_window_start).format('HH:mm:ss'))
@@ -353,6 +359,7 @@ Application.Controllers.controller "ReserveTrainingController", ["$scope", "$sta
       r = mkReservation($scope.ctrl.member, $scope.selectedTraining, $scope.selectedPlan)
       Price.compute mkRequestParams(r, $scope.coupon.applied), (res) ->
         $scope.amountTotal = res.price
+        $scope.totalNoCoupon = res.price_without_coupon
     else
       $scope.amountTotal = null
 
diff --git a/app/assets/javascripts/directives/coupon.coffee.erb b/app/assets/javascripts/directives/coupon.coffee.erb
index 531116100..357c72d74 100644
--- a/app/assets/javascripts/directives/coupon.coffee.erb
+++ b/app/assets/javascripts/directives/coupon.coffee.erb
@@ -4,6 +4,7 @@ Application.Directives.directive 'coupon', [ 'Coupon', 'growl', '_t', (Coupon, g
     scope:
       show: '='
       coupon: '='
+      total: '@'
       userId: '@'
     templateUrl: '<%= asset_path "shared/_coupon.html" %>'
     link: ($scope, element, attributes) ->
@@ -15,11 +16,9 @@ Application.Directives.directive 'coupon', [ 'Coupon', 'growl', '_t', (Coupon, g
       # Available status are: 'pending', 'valid', 'invalid'
       $scope.status = 'pending'
 
-      # Binding for the code inputed
+      # Binding for the code inputed (see the attached template)
       $scope.couponCode = null
 
-
-
       ##
       # Callback to validate the code
       ##
@@ -28,7 +27,7 @@ Application.Directives.directive 'coupon', [ 'Coupon', 'growl', '_t', (Coupon, g
           $scope.status = 'pending'
           $scope.coupon = null
         else
-          Coupon.validate {code: $scope.couponCode, user_id: $scope.userId}, (res) ->
+          Coupon.validate {code: $scope.couponCode, user_id: $scope.userId, amount: $scope.total}, (res) ->
             $scope.status = 'valid'
             $scope.coupon = res
             growl.success(_t('the_coupon_has_been_applied_you_get_PERCENT_discount', {PERCENT: res.percent_off}))
diff --git a/app/assets/templates/machines/reserve.html.erb b/app/assets/templates/machines/reserve.html.erb
index f80ffb700..79464edef 100644
--- a/app/assets/templates/machines/reserve.html.erb
+++ b/app/assets/templates/machines/reserve.html.erb
@@ -78,7 +78,7 @@
           <div class="clear"><a class="pull-right m-b-sm text-u-l ng-scope m-r-sm" href="#" ng-click="removeMachineSlot(machineSlot, $event)" ng-if="machineSlot.isValid" translate>{{ 'remove_this_slot' }}</a></div>
         </div>
 
-        <coupon show="machineSlotsValid() && (!plansAreShown || selectedPlan)" coupon="coupon.applied" user-id="{{ctrl.member.id}}"></coupon>
+        <coupon show="machineSlotsValid() && (!plansAreShown || selectedPlan)" coupon="coupon.applied" total="{{totalNoCoupon}}" user-id="{{ctrl.member.id}}"></coupon>
 
         <span ng-hide="fablabWithoutPlans">
           <div ng-if="machineSlotsValid() && !ctrl.member.subscribed_plan" ng-show="!plansAreShown">
diff --git a/app/assets/templates/trainings/reserve.html.erb b/app/assets/templates/trainings/reserve.html.erb
index 5f03078f4..3cbad9955 100644
--- a/app/assets/templates/trainings/reserve.html.erb
+++ b/app/assets/templates/trainings/reserve.html.erb
@@ -82,7 +82,7 @@
           <a class="pull-right m-t-xs text-u-l" href="#" ng-click="removeTraining($event)" ng-if="trainingIsValid" translate>{{ 'remove_this_slot' }}</a>
         </div>
 
-        <coupon show="trainingIsValid && (!plansIsShow || selectedPlan)" coupon="coupon.applied" user-id="{{ctrl.member.id}}"></coupon>
+        <coupon show="trainingIsValid && (!plansIsShow || selectedPlan)" coupon="coupon.applied" user-id="{{ctrl.member.id}}" total="{{totalNoCoupon}}"></coupon>
 
         <span ng-hide="fablabWithoutPlans">
           <div ng-if="trainingIsValid && !ctrl.member.subscribed_plan" ng-show="!plansIsShow">
diff --git a/app/controllers/api/coupons_controller.rb b/app/controllers/api/coupons_controller.rb
index 0c25c6d83..3149e1c10 100644
--- a/app/controllers/api/coupons_controller.rb
+++ b/app/controllers/api/coupons_controller.rb
@@ -30,7 +30,7 @@ class API::CouponsController < API::ApiController
         _user_id = params[:user_id]
       end
 
-      status = @coupon.status(_user_id)
+      status = @coupon.status(_user_id, params[:amount])
       if status != 'active'
         render json: {status: status}, status: :unprocessable_entity
       else
diff --git a/app/models/coupon.rb b/app/models/coupon.rb
index d34f69b1f..b4fe0a7f8 100644
--- a/app/models/coupon.rb
+++ b/app/models/coupon.rb
@@ -26,12 +26,15 @@ class Coupon < ActiveRecord::Base
   # - may has expired because the validity date has been reached,
   # - may have been used the maximum number of times it was allowed
   # - may have already been used by the provided user, if the coupon is configured to allow only one use per user,
+  # - may exceed the current cart's total amount, if the coupon is configured to discount an amount (and not a percentage)
   # - may be available for use
   # @param [user_id] {Number} if provided and if the current coupon's validity_per_user == 'once', check that the coupon
   # was already used by the provided user
+  # @param [amount] {Number} if provided and if the current coupon's type == 'amont_off' check that the coupon
+  # does not exceed the cart total price
   # @return {String} status identifier
   ##
-  def status(user_id = nil)
+  def status(user_id = nil, amount = nil)
     if not active?
       'disabled'
     elsif (!valid_until.nil?) and valid_until.at_end_of_day < DateTime.now
@@ -40,6 +43,8 @@ class Coupon < ActiveRecord::Base
       'sold_out'
     elsif (!user_id.nil?) and validity_per_user == 'once' and users_ids.include?(user_id.to_i)
       'already_used'
+    elsif (!amount.nil?) and type == 'amount_off' and amount_off > amount.to_f
+      'amount_exceeded'
     else
       'active'
     end
diff --git a/app/models/price.rb b/app/models/price.rb
index 9544c755b..ddb95a6d3 100644
--- a/app/models/price.rb
+++ b/app/models/price.rb
@@ -111,10 +111,11 @@ class Price < ActiveRecord::Base
     end
 
     # === apply Coupon if any ===
+    _amount_no_coupon = _amount
     _amount = CouponApplyService.new.(_amount, coupon_code)
 
     # return result
-    {elements: _elements, total: _amount}
+    {elements: _elements, total: _amount, before_coupon: _amount_no_coupon}
   end
 
   private
diff --git a/app/views/api/prices/compute.json.jbuilder b/app/views/api/prices/compute.json.jbuilder
index 752ac43ac..0a268bfd3 100644
--- a/app/views/api/prices/compute.json.jbuilder
+++ b/app/views/api/prices/compute.json.jbuilder
@@ -1,4 +1,5 @@
 json.price @amount[:total] / 100.00
+json.price_without_coupon @amount[:before_coupon] / 100.00
 json.details do
   json.slots @amount[:elements][:slots] do |slot|
     json.start_at slot[:start_at]
diff --git a/config/locales/app.shared.en.yml b/config/locales/app.shared.en.yml
index 50b7d7670..053fd6a65 100644
--- a/config/locales/app.shared.en.yml
+++ b/config/locales/app.shared.en.yml
@@ -372,4 +372,5 @@ en:
         unable_to_apply_the_coupon_because_expired: "Unable to apply the coupon: this code has expired."
         unable_to_apply_the_coupon_because_sold_out: "Unable to apply the coupon: this code reached its quota."
         unable_to_apply_the_coupon_because_already_used: "Unable to apply the coupon: you have already used this code once before."
+        unable_to_apply_the_coupon_because_amount_exceeded: "Unable to apply the coupon: the discount exceed the total amount of this purchase."
         unable_to_apply_the_coupon_because_rejected: "This code does not exists."
diff --git a/config/locales/app.shared.fr.yml b/config/locales/app.shared.fr.yml
index 3472ab59c..068f2d539 100644
--- a/config/locales/app.shared.fr.yml
+++ b/config/locales/app.shared.fr.yml
@@ -372,4 +372,5 @@ fr:
         unable_to_apply_the_coupon_because_expired: "Impossible d'appliquer la réduction : ce code promo a expiré."
         unable_to_apply_the_coupon_because_sold_out: "Impossible d'appliquer la réduction : ce code promo a atteint son quota."
         unable_to_apply_the_coupon_because_already_used: "Impossible d'appliquer la réduction : vous avez déjà utilisé ce code promo par le passé."
+        unable_to_apply_the_coupon_because_amount_exceeded: "Impossible d'appliquer la réduction : la réduction dépasse le total de cet achat."
         unable_to_apply_the_coupon_because_rejected: "Ce code promo n'existe pas."
\ No newline at end of file