diff --git a/addons/point_of_sale/static/src/js/models.js b/addons/point_of_sale/static/src/js/models.js
index dc2557fa62d..13422c7f9e8 100644
--- a/addons/point_of_sale/static/src/js/models.js
+++ b/addons/point_of_sale/static/src/js/models.js
@@ -188,14 +188,20 @@ function openerp_pos_models(instance, module){ //module is instance.point_of_sal
             },
         },{
             model:  'account.tax',
-            fields: ['name','amount', 'price_include', 'include_base_amount', 'type'],
+            fields: ['name','amount', 'price_include', 'include_base_amount', 'type', 'child_ids', 'child_depend', 'include_base_amount'],
             domain: null,
-            loaded: function(self,taxes){ 
-                self.taxes = taxes; 
+            loaded: function(self, taxes){
+                self.taxes = taxes;
                 self.taxes_by_id = {};
-                for (var i = 0; i < taxes.length; i++) {
-                    self.taxes_by_id[taxes[i].id] = taxes[i];
-                }
+                _.each(taxes, function(tax){
+                    self.taxes_by_id[tax.id] = tax;
+                });
+                _.each(self.taxes_by_id, function(tax) {
+                    tax.child_taxes = {};
+                    _.each(tax.child_ids, function(child_tax_id) {
+                        tax.child_taxes[child_tax_id] = self.taxes_by_id[child_tax_id];
+                    });
+                });
             },
         },{
             model:  'pos.session',
@@ -851,52 +857,84 @@ function openerp_pos_models(instance, module){ //module is instance.point_of_sal
         get_tax_details: function(){
             return this.get_all_prices().taxDetails;
         },
-        get_all_prices: function(){
+        compute_all: function(taxes, price_unit) {
             var self = this;
+            var res = [];
             var currency_rounding = this.pos.currency.rounding;
-            var base = this.get_base_price();
-            var totalTax = base;
-            var totalNoTax = base;
-            
-            var product =  this.get_product(); 
-            var taxes = this.get_applicable_taxes();
-            var taxtotal = 0;
-            var taxdetail = {};
-            _.each(taxes, function(tax) {
+            var base = price_unit;
+            _(taxes).each(function(tax) {
                 if (tax.price_include) {
-                    var tmp;
                     if (tax.type === "percent") {
-                        tmp =  base - round_pr(base / (1 + tax.amount),currency_rounding); 
+                        tmp =  round_pr(base - round_pr(base / (1 + tax.amount),currency_rounding),currency_rounding);
+                        data = {amount:tmp, price_include:true, id: tax.id};
+                        res.push(data);
                     } else if (tax.type === "fixed") {
                         tmp = round_pr(tax.amount * self.get_quantity(),currency_rounding);
+                        data = {amount:tmp, price_include:true, id: tax.id};
+                        res.push(data);
                     } else {
                         throw "This type of tax is not supported by the point of sale: " + tax.type;
                     }
-                    tmp = round_pr(tmp,currency_rounding);
-                    taxtotal += tmp;
-                    totalNoTax -= tmp;
-                    taxdetail[tax.id] = tmp;
                 } else {
-                    var tmp;
                     if (tax.type === "percent") {
-                        tmp = tax.amount * base;
+                        tmp = round_pr(tax.amount * base, currency_rounding);
+                        data = {amount:tmp, price_include:false, id: tax.id};
+                        res.push(data);
                     } else if (tax.type === "fixed") {
-                        tmp = tax.amount * self.get_quantity();
+                        tmp = round_pr(tax.amount * self.get_quantity(), currency_rounding);
+                        data = {amount:tmp, price_include:false, id: tax.id};
+                        res.push(data);
                     } else {
                         throw "This type of tax is not supported by the point of sale: " + tax.type;
                     }
 
-                    tmp = round_pr(tmp,currency_rounding);
-                    
-                    if (tax.include_base_amount) {
-                        base += tmp;
+                    var base_amount = data.amount;
+                    var child_amount = 0.0;
+                    if (tax.child_depend) {
+                        res.pop(); // do not use parent tax
+                        child_tax = self.compute_all(tax.child_taxes, base_amount);
+                        res.push(child_tax);
+                        _(child_tax).each(function(child) {
+                            child_amount += child.amount;
+                        });
+                    }
+                    if (tax.include_base_amount) {
+                        base += base_amount + child_amount;
                     }
-
-                    taxtotal += tmp;
-                    totalTax += tmp;
-                    taxdetail[tax.id] = tmp;
                 }
             });
+            return res;
+        },
+        get_all_prices: function(){
+            var base = round_pr(this.get_quantity() * this.get_unit_price() * (1.0 - (this.get_discount() / 100.0)), this.pos.currency.rounding);
+            var totalTax = base;
+            var totalNoTax = base;
+            var taxtotal = 0;
+
+            var product =  this.get_product();
+            var taxes_ids = product.taxes_id;
+            var taxes =  this.pos.taxes;
+            var taxdetail = {};
+            var product_taxes = [];
+
+            _(taxes_ids).each(function(el){
+                product_taxes.push(_.detect(taxes, function(t){
+                    return t.id === el;
+                }));
+            });
+
+            var all_taxes = _(this.compute_all(product_taxes, base)).flatten();
+
+            _(all_taxes).each(function(tax) {
+                if (tax.price_include) {
+                    totalNoTax -= tax.amount;
+                } else {
+                    totalTax += tax.amount;
+                }
+                taxtotal += tax.amount;
+                taxdetail[tax.id] = tax.amount;
+            });
+
             return {
                 "priceWithTax": totalTax,
                 "priceWithoutTax": totalNoTax,