diff --git a/taiga/locale/ca/LC_MESSAGES/django.po b/taiga/locale/ca/LC_MESSAGES/django.po
index ed198ff2..da3a1146 100644
--- a/taiga/locale/ca/LC_MESSAGES/django.po
+++ b/taiga/locale/ca/LC_MESSAGES/django.po
@@ -9,7 +9,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -185,7 +185,7 @@ msgstr ""
 "està corrupte."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1176,13 +1176,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "No tens permisos per a veure açò."
 
@@ -2394,6 +2394,14 @@ msgstr "Severitats"
 msgid "Roles"
 msgstr "Rols"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr ""
@@ -3287,14 +3295,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/de/LC_MESSAGES/django.po b/taiga/locale/de/LC_MESSAGES/django.po
index 2fde1a47..1e58b906 100644
--- a/taiga/locale/de/LC_MESSAGES/django.po
+++ b/taiga/locale/de/LC_MESSAGES/django.po
@@ -17,7 +17,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -215,7 +215,7 @@ msgstr ""
 "haben, ist entweder kein Bild oder defekt."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1366,13 +1366,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "Sie haben keine Berechtigungen für diese Ansicht"
 
@@ -2866,6 +2866,14 @@ msgstr "Gewichtung"
 msgid "Roles"
 msgstr "Rollen"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Zukünftiger Sprint"
@@ -3812,14 +3820,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/en/LC_MESSAGES/django.po b/taiga/locale/en/LC_MESSAGES/django.po
index 6d00fcbd..8bfe1422 100644
--- a/taiga/locale/en/LC_MESSAGES/django.po
+++ b/taiga/locale/en/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2015-03-25 20:09+0100\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Taiga Dev Team <support@taiga.io>\n"
@@ -176,7 +176,7 @@ msgid ""
 msgstr ""
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1148,13 +1148,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr ""
 
@@ -2360,6 +2360,14 @@ msgstr ""
 msgid "Roles"
 msgstr ""
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr ""
@@ -3230,14 +3238,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/es/LC_MESSAGES/django.po b/taiga/locale/es/LC_MESSAGES/django.po
index f337481a..00a75a9c 100644
--- a/taiga/locale/es/LC_MESSAGES/django.po
+++ b/taiga/locale/es/LC_MESSAGES/django.po
@@ -16,7 +16,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -202,7 +202,7 @@ msgid ""
 msgstr "Adjunta una imagen válida. El fichero no es una imagen o está dañada."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1346,7 +1346,7 @@ msgstr "El usuario no existe"
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
@@ -1354,7 +1354,7 @@ msgstr ""
 "El proyecto debe tener un dueño y al menos uno de los usuarios debe ser un "
 "administrador activo"
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "No tienes suficientes permisos para ver esto."
 
@@ -2801,6 +2801,14 @@ msgstr "Gravedades"
 msgid "Roles"
 msgstr "Roles"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Sprint futuro"
@@ -3750,14 +3758,6 @@ msgstr "No puedes tener más proyectos privados"
 msgid "You can't have more public projects"
 msgstr "No puedes tener más proyectos públicos"
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/fi/LC_MESSAGES/django.po b/taiga/locale/fi/LC_MESSAGES/django.po
index b8031f95..6f73ebe2 100644
--- a/taiga/locale/fi/LC_MESSAGES/django.po
+++ b/taiga/locale/fi/LC_MESSAGES/django.po
@@ -9,7 +9,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -187,7 +187,7 @@ msgstr ""
 "vioittunut."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1305,13 +1305,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "Sinulla ei ole oikeuksia nähdä tätä."
 
@@ -2763,6 +2763,14 @@ msgstr "Vakavuudet"
 msgid "Roles"
 msgstr "Roolit"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Tuleva kierros"
@@ -3688,14 +3696,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/fr/LC_MESSAGES/django.po b/taiga/locale/fr/LC_MESSAGES/django.po
index c1a5dbd5..67c37f2f 100644
--- a/taiga/locale/fr/LC_MESSAGES/django.po
+++ b/taiga/locale/fr/LC_MESSAGES/django.po
@@ -22,7 +22,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -211,7 +211,7 @@ msgstr ""
 "image ou était une image corrompue."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1318,13 +1318,13 @@ msgstr "L'utilisateur n'existe pas"
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "Vous n'avez pas les permissions pour consulter cet élément"
 
@@ -2560,6 +2560,14 @@ msgstr "Sévérités"
 msgid "Roles"
 msgstr "Rôles"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Sprint futurs"
@@ -3476,14 +3484,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/it/LC_MESSAGES/django.po b/taiga/locale/it/LC_MESSAGES/django.po
index 2f042498..ba84680a 100644
--- a/taiga/locale/it/LC_MESSAGES/django.po
+++ b/taiga/locale/it/LC_MESSAGES/django.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -196,7 +196,7 @@ msgstr ""
 "o l'immagine potrebbe essere corrotta. "
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1439,13 +1439,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "Non hai il permesso di vedere questo elemento."
 
@@ -3038,6 +3038,14 @@ msgstr "Criticità"
 msgid "Roles"
 msgstr "Ruoli"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Sprint futuri"
@@ -3988,14 +3996,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/nl/LC_MESSAGES/django.po b/taiga/locale/nl/LC_MESSAGES/django.po
index c6cc1c9e..b1172cc3 100644
--- a/taiga/locale/nl/LC_MESSAGES/django.po
+++ b/taiga/locale/nl/LC_MESSAGES/django.po
@@ -9,7 +9,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -196,7 +196,7 @@ msgstr ""
 "een afbeelding ofwel een corrupte afbeelding."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1239,13 +1239,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "Je hebt geen toestamming om dat te bekijken."
 
@@ -2483,6 +2483,14 @@ msgstr "Ernstniveaus"
 msgid "Roles"
 msgstr "Rollen"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Toekomstige sprint"
@@ -3381,14 +3389,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/pl/LC_MESSAGES/django.po b/taiga/locale/pl/LC_MESSAGES/django.po
index 69cce377..01eeb2dc 100644
--- a/taiga/locale/pl/LC_MESSAGES/django.po
+++ b/taiga/locale/pl/LC_MESSAGES/django.po
@@ -10,7 +10,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -190,7 +190,7 @@ msgstr ""
 "jest uszkodzony."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1347,13 +1347,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "Nie masz uprawnień by to zobaczyć."
 
@@ -2820,6 +2820,14 @@ msgstr "Ważność"
 msgid "Roles"
 msgstr "Role"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Przyszły sprint"
@@ -3752,14 +3760,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/pt_BR/LC_MESSAGES/django.po b/taiga/locale/pt_BR/LC_MESSAGES/django.po
index 7c9c5270..ca6d64ba 100644
--- a/taiga/locale/pt_BR/LC_MESSAGES/django.po
+++ b/taiga/locale/pt_BR/LC_MESSAGES/django.po
@@ -19,7 +19,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -197,7 +197,7 @@ msgstr ""
 "está corrompido."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1353,13 +1353,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "Você não tem permissão para ver isso"
 
@@ -2804,6 +2804,14 @@ msgstr "Severidades"
 msgid "Roles"
 msgstr "Funções"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Sprint futuro"
@@ -3731,14 +3739,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/ru/LC_MESSAGES/django.po b/taiga/locale/ru/LC_MESSAGES/django.po
index 512d232e..437a2093 100644
--- a/taiga/locale/ru/LC_MESSAGES/django.po
+++ b/taiga/locale/ru/LC_MESSAGES/django.po
@@ -15,7 +15,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -200,7 +200,7 @@ msgstr ""
 "изображение, либо не корректное изображение."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1354,13 +1354,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "У вас нет разрешения на просмотр."
 
@@ -2819,6 +2819,14 @@ msgstr "Степени важности"
 msgid "Roles"
 msgstr "Роли"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Будущий спринт"
@@ -3746,14 +3754,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/sv/LC_MESSAGES/django.po b/taiga/locale/sv/LC_MESSAGES/django.po
index 49e7041c..42b6dac3 100644
--- a/taiga/locale/sv/LC_MESSAGES/django.po
+++ b/taiga/locale/sv/LC_MESSAGES/django.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -189,7 +189,7 @@ msgstr ""
 "eller en skadad bild."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1194,13 +1194,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "Du har inte behörighet att se det. "
 
@@ -2406,6 +2406,14 @@ msgstr "Allvarsgrad"
 msgid "Roles"
 msgstr "Roller"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Framtidig sprint"
@@ -3296,14 +3304,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/tr/LC_MESSAGES/django.po b/taiga/locale/tr/LC_MESSAGES/django.po
index d5aa3d2a..591cb691 100644
--- a/taiga/locale/tr/LC_MESSAGES/django.po
+++ b/taiga/locale/tr/LC_MESSAGES/django.po
@@ -10,10 +10,9 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
-"PO-Revision-Date: 2016-03-30 10:59+0000\n"
-"Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
-"com>\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
+"PO-Revision-Date: 2016-04-04 13:40+0000\n"
+"Last-Translator: catborise <muhammetalisag@gmail.com>\n"
 "Language-Team: Turkish (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/tr/)\n"
 "MIME-Version: 1.0\n"
@@ -197,13 +196,13 @@ msgstr ""
 "resim dosyası değil."
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
 #: taiga/webhooks/api.py:67
 msgid "Blocked element"
-msgstr ""
+msgstr "Engellenmiş nesne"
 
 #: taiga/base/api/pagination.py:213
 msgid "Page is not 'last', nor can it be converted to an int."
@@ -355,7 +354,7 @@ msgstr "Ön şart hatası"
 
 #: taiga/base/exceptions.py:217
 msgid "No room left for more projects."
-msgstr ""
+msgstr "Daha fazla proje için yer kalmadı."
 
 #: taiga/base/filters.py:79 taiga/base/filters.py:444
 msgid "Error in filter params types."
@@ -1291,23 +1290,23 @@ msgstr "Geçersiz şablon tanımı"
 
 #: taiga/projects/api.py:356
 msgid "Invalid user id"
-msgstr ""
+msgstr "Geçersiz kullanıcı id"
 
 #: taiga/projects/api.py:362
 msgid "The user doesn't exist"
-msgstr ""
+msgstr "Kullanıcı mevcut değil"
 
 #: taiga/projects/api.py:366
 msgid "The user must be already a project member"
-msgstr ""
+msgstr "Kullanıcı zaten proje üyesi durumunda"
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "Görebilmek için yetkiniz yok."
 
@@ -1406,7 +1405,7 @@ msgstr ""
 
 #: taiga/projects/choices.py:34
 msgid "This project is blocked because the owner left"
-msgstr ""
+msgstr "Yetkili kalmadığı için proje bloklandı"
 
 #: taiga/projects/custom_attributes/choices.py:27
 msgid "Text"
@@ -1422,7 +1421,7 @@ msgstr "Tarih"
 
 #: taiga/projects/custom_attributes/choices.py:30
 msgid "Url"
-msgstr ""
+msgstr "Url"
 
 #: taiga/projects/custom_attributes/models.py:39
 #: taiga/projects/issues/models.py:47
@@ -1828,7 +1827,7 @@ msgstr ""
 
 #: taiga/projects/models.py:225
 msgid "blocked code"
-msgstr ""
+msgstr "engellenmiş kod"
 
 #: taiga/projects/models.py:229 taiga/projects/notifications/models.py:65
 msgid "updated date time"
@@ -2579,6 +2578,14 @@ msgstr "Önem dereceleri"
 msgid "Roles"
 msgstr "Roller"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "Gelecek sprint"
@@ -3464,14 +3471,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/locale/zh-Hant/LC_MESSAGES/django.po b/taiga/locale/zh-Hant/LC_MESSAGES/django.po
index 2136848c..86d2219b 100644
--- a/taiga/locale/zh-Hant/LC_MESSAGES/django.po
+++ b/taiga/locale/zh-Hant/LC_MESSAGES/django.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-01 11:09+0200\n"
+"POT-Creation-Date: 2016-04-05 19:23+0200\n"
 "PO-Revision-Date: 2016-03-30 10:59+0000\n"
 "Last-Translator: Alejandro Alonso Fernández <alejandroalonsofernandez@gmail."
 "com>\n"
@@ -183,7 +183,7 @@ msgid ""
 msgstr "上傳有效圖片，你所上傳的檔案非圖檔或已損壞"
 
 #: taiga/base/api/mixins.py:255 taiga/base/exceptions.py:209
-#: taiga/hooks/api.py:68 taiga/projects/api.py:629
+#: taiga/hooks/api.py:68 taiga/projects/api.py:641
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
@@ -1327,13 +1327,13 @@ msgstr ""
 msgid "The user must be already a project member"
 msgstr ""
 
-#: taiga/projects/api.py:668
+#: taiga/projects/api.py:671
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
 
-#: taiga/projects/api.py:708
+#: taiga/projects/api.py:705
 msgid "You don't have permisions to see that."
 msgstr "您無觀看權限"
 
@@ -2789,6 +2789,14 @@ msgstr "嚴重性"
 msgid "Roles"
 msgstr "角色"
 
+#: taiga/projects/services/members.py:147 taiga/users/services.py:625
+msgid "You have reached your current limit of memberships for private projects"
+msgstr ""
+
+#: taiga/projects/services/members.py:151 taiga/users/services.py:634
+msgid "You have reached your current limit of memberships for public projects"
+msgstr ""
+
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
 msgstr "未來之衝刺"
@@ -3701,14 +3709,6 @@ msgstr ""
 msgid "You can't have more public projects"
 msgstr ""
 
-#: taiga/users/services.py:625
-msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
-
-#: taiga/users/services.py:634
-msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
-
 #: taiga/users/templates/emails/change_email-body-html.jinja:4
 #, python-format
 msgid ""
diff --git a/taiga/projects/api.py b/taiga/projects/api.py
index d32115c4..07aaaab1 100644
--- a/taiga/projects/api.py
+++ b/taiga/projects/api.py
@@ -615,6 +615,18 @@ class MembershipViewSet(BlockedByProjectMixin, ModelCrudViewSet):
         else:
             return self.serializer_class
 
+    def _check_if_project_can_have_more_memberships(self, project, total_new_memberships):
+        (can_add_memberships, error_type) = services.check_if_project_can_have_more_memberships(
+            project,
+            total_new_memberships
+        )
+        if not can_add_memberships:
+            raise exc.NotEnoughSlotsForProject(
+                project.is_private,
+                total_new_memberships,
+                error_type
+            )
+
     @list_route(methods=["POST"])
     def bulk_create(self, request, **kwargs):
         serializer = serializers.MembersBulkSerializer(data=request.DATA)
@@ -628,18 +640,9 @@ class MembershipViewSet(BlockedByProjectMixin, ModelCrudViewSet):
         if project.blocked_code is not None:
             raise exc.Blocked(_("Blocked element"))
 
-        # TODO: this should be moved to main exception handler instead
-        # of handling explicit exception catchin here.
-
         if "bulk_memberships" in data and isinstance(data["bulk_memberships"], list):
-            members = len(data["bulk_memberships"])
-            (enough_slots, not_enough_slots_error) = users_service.has_available_slot_for_project(
-                project.owner,
-                project,
-                members
-            )
-            if not enough_slots:
-                raise exc.NotEnoughSlotsForProject(project.is_private, members, not_enough_slots_error)
+            total_new_memberships = len(data["bulk_memberships"])
+            self._check_if_project_can_have_more_memberships(project, total_new_memberships)
 
         try:
             members = services.create_members_in_bulk(data["bulk_memberships"],
@@ -665,18 +668,12 @@ class MembershipViewSet(BlockedByProjectMixin, ModelCrudViewSet):
 
     def pre_delete(self, obj):
         if obj.user is not None and not services.can_user_leave_project(obj.user, obj.project):
-            raise exc.BadRequest(_("The project must have an owner and at least one of the users must be an active admin"))
+            raise exc.BadRequest(_("The project must have an owner and at least one of the users "
+                                   "must be an active admin"))
 
     def pre_save(self, obj):
         if not obj.id:
-            members = 1
-            (enough_slots, not_enough_slots_error) = users_service.has_available_slot_for_project(
-                self.request.user,
-                obj.project,
-                members
-            )
-            if not enough_slots:
-                raise exc.NotEnoughSlotsForProject(obj.project.is_private, members, not_enough_slots_error)
+            self._check_if_project_can_have_more_memberships(obj.project, 1)
 
         if not obj.token:
             obj.token = str(uuid.uuid1())
diff --git a/taiga/projects/services/__init__.py b/taiga/projects/services/__init__.py
index 6227cc54..a4a1d465 100644
--- a/taiga/projects/services/__init__.py
+++ b/taiga/projects/services/__init__.py
@@ -40,6 +40,7 @@ from .members import get_members_from_bulk
 from .members import remove_user_from_project, project_has_valid_admins, can_user_leave_project
 from .members import get_max_memberships_for_project, get_total_project_memberships
 from .members import check_if_project_privacity_can_be_changed
+from .members import check_if_project_can_have_more_memberships
 
 from .modules_config import get_modules_config
 
diff --git a/taiga/projects/services/members.py b/taiga/projects/services/members.py
index f408d430..1174bdf3 100644
--- a/taiga/projects/services/members.py
+++ b/taiga/projects/services/members.py
@@ -1,4 +1,22 @@
+# Copyright (C) 2014-2016 Andrey Antukh <niwi@niwi.nz>
+# Copyright (C) 2014-2016 Jesús Espino <jespinog@gmail.com>
+# Copyright (C) 2014-2016 David Barragán <bameda@dbarragan.com>
+# Copyright (C) 2014-2016 Alejandro Alonso <alejandro.alonso@kaleidos.net>
+# 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/>.
+
 from taiga.base.utils import db, text
+from django.utils.translation import ugettext as _
 
 from .. import models
 
@@ -120,3 +138,19 @@ def check_if_project_privacity_can_be_changed(project):
         return {'can_be_updated': False, 'reason': error_project_exceeded}
 
     return {'can_be_updated': True, 'reason': None}
+
+
+def check_if_project_can_have_more_memberships(project, total_new_memberships):
+    if project.is_private:
+        total_memberships = project.memberships.count() + total_new_memberships
+        max_memberships = project.owner.max_memberships_private_projects
+        error_members_exceeded = _("You have reached your current limit of memberships for private projects")
+    else:
+        total_memberships = project.memberships.count() + total_new_memberships
+        max_memberships = project.owner.max_memberships_public_projects
+        error_members_exceeded = _("You have reached your current limit of memberships for public projects")
+
+    if max_memberships is not None and total_memberships > max_memberships:
+        return False, error_members_exceeded
+
+    return True, None