diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/Order.java b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/Order.java
index d54030872..2998d27bb 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/Order.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/Order.java
@@ -47,11 +47,6 @@ public class Order extends OrderLineGroup {
         Order order = new Order();
         order.setNewObject(true);
 
-        order.setWorkBudget(new BigDecimal(0).setScale(2));
-        order.setMaterialsBudget(new BigDecimal(0).setScale(2));
-        order.setTotalBudget(new BigDecimal(0).setScale(2));
-        order.setTotalHours(new Integer(0));
-        order.setState(OrderStatusEnum.getDefault());
         OrderLineGroup.setupOrderLineGroup(order);
 
         return order;
@@ -77,15 +72,13 @@ public class Order extends OrderLineGroup {
 
     private Integer lastOrderElementSequenceCode = 0;
 
-    private BigDecimal workBudget;
+    private BigDecimal workBudget = BigDecimal.ZERO.setScale(2);
 
-    private BigDecimal materialsBudget;
+    private BigDecimal materialsBudget = BigDecimal.ZERO.setScale(2);
 
-    private BigDecimal totalBudget;
+    private Integer totalHours = 0;
 
-    private Integer totalHours;
-
-    private OrderStatusEnum state;
+    private OrderStatusEnum state = OrderStatusEnum.getDefault();
 
     private ExternalCompany customer;
 
@@ -94,27 +87,35 @@ public class Order extends OrderLineGroup {
     private String externalCode;
 
     public BigDecimal getWorkBudget() {
+        if (workBudget == null) {
+            return BigDecimal.ZERO;
+        }
         return workBudget;
     }
 
     public void setWorkBudget(BigDecimal workBudget) {
+        if (workBudget == null) {
+            workBudget = BigDecimal.ZERO.setScale(2);
+        }
         this.workBudget = workBudget;
     }
 
     public BigDecimal getMaterialsBudget() {
+        if (materialsBudget == null) {
+            return BigDecimal.ZERO;
+        }
         return materialsBudget;
     }
 
     public void setMaterialsBudget(BigDecimal materialsBudget) {
+        if (materialsBudget == null) {
+            materialsBudget = BigDecimal.ZERO.setScale(2);
+        }
         this.materialsBudget = materialsBudget;
     }
 
     public BigDecimal getTotalBudget() {
-        return totalBudget;
-    }
-
-    public void setTotalBudget(BigDecimal totalBudget) {
-        this.totalBudget = totalBudget;
+        return getWorkBudget().add(getMaterialsBudget());
     }
 
     public Integer getTotalHours() {
diff --git a/navalplanner-business/src/main/resources/org/navalplanner/business/orders/entities/Orders.hbm.xml b/navalplanner-business/src/main/resources/org/navalplanner/business/orders/entities/Orders.hbm.xml
index a9929d749..5319b277a 100644
--- a/navalplanner-business/src/main/resources/org/navalplanner/business/orders/entities/Orders.hbm.xml
+++ b/navalplanner-business/src/main/resources/org/navalplanner/business/orders/entities/Orders.hbm.xml
@@ -73,7 +73,6 @@
 
                 <property name="workBudget" access="field" />
                 <property name="materialsBudget" access="field" />
-                <property name="totalBudget" access="field" />
                 <property name="totalHours" access="field" />
                 <property name="customerReference" access="field" />
                 <property name="externalCode" access="field" />
diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderCRUDController.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderCRUDController.java
index 1c00b4b61..f36210f9f 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderCRUDController.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderCRUDController.java
@@ -22,7 +22,6 @@ package org.navalplanner.web.orders;
 
 import static org.navalplanner.web.I18nHelper._;
 
-import java.math.BigDecimal;
 import java.text.SimpleDateFormat;
 import java.util.ConcurrentModificationException;
 import java.util.Date;
@@ -559,20 +558,6 @@ public class OrderCRUDController extends GenericForwardComposer {
         return OrderStatusEnum.values();
     }
 
-    public void calculateTotalBudget(BigDecimal workBudget,
-            BigDecimal materialsBudget, Label txtTotalBudget) {
-        BigDecimal sum = new BigDecimal(0);
-        if ((workBudget != null) && (materialsBudget != null)) {
-            sum = workBudget.add(materialsBudget);
-        } else if (workBudget != null) {
-            sum = workBudget;
-        } else if (materialsBudget != null) {
-            sum = materialsBudget;
-        }
-        txtTotalBudget.setValue(sum.toString());
-        txtTotalBudget.invalidate();
-    }
-
     public List<ExternalCompany> getExternalCompaniesAreClient() {
         return orderModel.getExternalCompaniesAreClient();
     }
@@ -718,4 +703,9 @@ public class OrderCRUDController extends GenericForwardComposer {
     public String getTooltipText(final Order order) {
         return orderModel.gettooltipText(order);
     }
+
+    public void reloadTotalBudget(Label txtTotalBudget) {
+        Util.reloadBindings(txtTotalBudget);
+    }
+
 }
diff --git a/navalplanner-webapp/src/main/webapp/orders/_edition.zul b/navalplanner-webapp/src/main/webapp/orders/_edition.zul
index 984012678..720a89ee5 100644
--- a/navalplanner-webapp/src/main/webapp/orders/_edition.zul
+++ b/navalplanner-webapp/src/main/webapp/orders/_edition.zul
@@ -120,12 +120,12 @@
                                 <label value="${i18n:_('Work')}" />
                                 <decimalbox id="boxWorkBudget" width="150px" scale = "2"
                                     value="@{controller.order.workBudget}"
-                                    onChange="controller.calculateTotalBudget(self.value,boxMaterialsBudget.value,txtTotalBudget)"/>
+                                    onChange="controller.reloadTotalBudget(txtTotalBudget)" />
                                 <separator bar="false" spacing="15px" orient="vertical"/>
                                 <label value="${i18n:_('Materials')}" />
                                 <decimalbox id="boxMaterialsBudget" width="150px" scale="2"
                                     value="@{controller.order.materialsBudget}"
-                                    onChange="controller.calculateTotalBudget(boxWorkBudget.value,self.value,txtTotalBudget)"/>
+                                    onChange="controller.reloadTotalBudget(txtTotalBudget)" />
                                 <separator bar="false" spacing="15px" orient="vertical"/>
                                 <label value="${i18n:_(' Total :')}" />
                                 <label id="txtTotalBudget" value="@{controller.order.totalBudget}"/>