diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/costcategories/entities/CostCategory.java b/navalplanner-business/src/main/java/org/navalplanner/business/costcategories/entities/CostCategory.java
new file mode 100644
index 000000000..6744a66bb
--- /dev/null
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/costcategories/entities/CostCategory.java
@@ -0,0 +1,54 @@
+/*
+ * This file is part of ###PROJECT_NAME###
+ *
+ * Copyright (C) 2009 Fundación para o Fomento da Calidade Industrial e
+ *                    Desenvolvemento Tecnolóxico de Galicia
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.navalplanner.business.costcategories.entities;
+
+import org.hibernate.validator.NotEmpty;
+import org.navalplanner.business.common.BaseEntity;
+
+/**
+ * @author Jacobo Aragunde Perez <jaragunde@igalia.com>
+ */
+public class CostCategory extends BaseEntity {
+
+	@NotEmpty
+    private String name;
+
+    // Default constructor, needed by Hibernate
+    protected CostCategory() {
+
+    }
+
+    public static CostCategory create(String name) {
+        return (CostCategory) create(new CostCategory(name));
+    }
+
+    protected CostCategory(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/costcategories/entities/HourCost.java b/navalplanner-business/src/main/java/org/navalplanner/business/costcategories/entities/HourCost.java
new file mode 100644
index 000000000..40ca6c2f8
--- /dev/null
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/costcategories/entities/HourCost.java
@@ -0,0 +1,79 @@
+/*
+ * This file is part of ###PROJECT_NAME###
+ *
+ * Copyright (C) 2009 Fundación para o Fomento da Calidade Industrial e
+ *                    Desenvolvemento Tecnolóxico de Galicia
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.navalplanner.business.costcategories.entities;
+
+import java.math.BigDecimal;
+import java.util.Date;
+
+import org.hibernate.validator.NotEmpty;
+import org.navalplanner.business.common.BaseEntity;
+
+/**
+ * @author Jacobo Aragunde Perez <jaragunde@igalia.com>
+ */
+public class HourCost extends BaseEntity {
+
+	@NotEmpty
+    private BigDecimal priceCost;
+
+	@NotEmpty
+    private Date initDate;
+
+    private Date endDate;
+
+    // Default constructor, needed by Hibernate
+    protected HourCost() {
+
+    }
+
+    public static HourCost create(BigDecimal priceCost, Date initDate) {
+        return (HourCost) create(new HourCost(priceCost, initDate));
+    }
+
+    protected HourCost(BigDecimal priceCost, Date initDate) {
+        this.priceCost = priceCost;
+        this.initDate = initDate;
+    }
+
+    public BigDecimal getPriceCost() {
+        return priceCost;
+    }
+
+    public void setPriceCost(BigDecimal priceCost) {
+        this.priceCost = priceCost;
+    }
+
+    public Date getInitDate() {
+        return initDate;
+    }
+
+    public void setInitDate(Date initDate) {
+        this.initDate = initDate;
+    }
+
+    public Date getEndDate() {
+        return endDate;
+    }
+
+    public void setEndDate(Date endDate) {
+        this.endDate = endDate;
+    }
+}
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/costcategories/entities/TypeOfWorkHours.java b/navalplanner-business/src/main/java/org/navalplanner/business/costcategories/entities/TypeOfWorkHours.java
new file mode 100644
index 000000000..450bb63ec
--- /dev/null
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/costcategories/entities/TypeOfWorkHours.java
@@ -0,0 +1,88 @@
+/*
+ * This file is part of ###PROJECT_NAME###
+ *
+ * Copyright (C) 2009 Fundación para o Fomento da Calidade Industrial e
+ *                    Desenvolvemento Tecnolóxico de Galicia
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.navalplanner.business.costcategories.entities;
+
+import java.math.BigDecimal;
+
+import org.hibernate.validator.NotEmpty;
+import org.navalplanner.business.common.BaseEntity;
+
+/**
+ * @author Jacobo Aragunde Perez <jaragunde@igalia.com>
+ */
+public class TypeOfWorkHours extends BaseEntity {
+
+    @NotEmpty
+    private String code;
+
+    @NotEmpty
+    private String name;
+
+    private BigDecimal defaultPrice;
+
+	boolean enabled = true;
+
+    // Default constructor, needed by Hibernate
+    protected TypeOfWorkHours() {
+
+    }
+
+    public static TypeOfWorkHours create(String code, String name) {
+        return (TypeOfWorkHours) create(new TypeOfWorkHours(code, name));
+    }
+
+    protected TypeOfWorkHours(String code, String name) {
+        this.code = code;
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public void setCode(String code) {
+        this.code = code;
+    }
+
+    public BigDecimal getDefaultPrice() {
+        return defaultPrice;
+    }
+
+    public void setDefaultPrice(BigDecimal price) {
+        this.defaultPrice = price;
+    }
+
+    public boolean getEnabled() {
+        return enabled;
+    }
+
+    public void setEnabled(boolean enabled) {
+        this.enabled = enabled;
+    }
+}