diff --git a/addons/point_of_sale/models/account_tax.py b/addons/point_of_sale/models/account_tax.py
index 48a7ecbe0c6..37cf71324e1 100644
--- a/addons/point_of_sale/models/account_tax.py
+++ b/addons/point_of_sale/models/account_tax.py
@@ -25,3 +25,12 @@ class AccountTax(models.Model):
                     'You must close the POS sessions before modifying the tax.'
                 ))
         return super(AccountTax, self).write(vals)
+
+    def get_real_tax_amount(self):
+        tax_list = []
+        for tax in self:
+            tax_repartition_lines = tax.invoice_repartition_line_ids.filtered(lambda x: x.repartition_type == 'tax')
+            total_factor = sum(tax_repartition_lines.mapped('factor'))
+            real_amount = tax.amount * total_factor
+            tax_list.append({'id': tax.id, 'amount': real_amount})
+        return tax_list
diff --git a/addons/point_of_sale/static/src/js/models.js b/addons/point_of_sale/static/src/js/models.js
index fbeddf38ed5..5e681776730 100644
--- a/addons/point_of_sale/static/src/js/models.js
+++ b/addons/point_of_sale/static/src/js/models.js
@@ -242,6 +242,19 @@ exports.PosModel = Backbone.Model.extend({
                     return self.taxes_by_id[child_tax_id];
                 });
             });
+            return new Promise(function (resolve, reject) {
+              var tax_ids = _.pluck(self.taxes, 'id');
+              rpc.query({
+                  model: 'account.tax',
+                  method: 'get_real_tax_amount',
+                  args: [tax_ids],
+              }).then(function (taxes) {
+                  _.each(taxes, function (tax) {
+                      self.taxes_by_id[tax.id].amount = tax.amount;
+                  resolve();
+                  });
+              });
+            });
         },
     },{
         model:  'pos.session',