diff --git a/ihatemoney/forms.py b/ihatemoney/forms.py
index cce36e390..1e0ba00eb 100644
--- a/ihatemoney/forms.py
+++ b/ihatemoney/forms.py
@@ -1,8 +1,8 @@
 from flask_wtf.form import FlaskForm
 from wtforms.fields.core import SelectField, SelectMultipleField
-from wtforms.fields.html5 import DateField, DecimalField
+from wtforms.fields.html5 import DateField, DecimalField, URLField
 from wtforms.fields.simple import PasswordField, SubmitField, TextAreaField, StringField
-from wtforms.validators import Email, DataRequired, ValidationError, EqualTo, NumberRange
+from wtforms.validators import Email, DataRequired, ValidationError, EqualTo, NumberRange, Optional
 from flask_babel import lazy_gettext as _
 from flask import request
 from werkzeug.security import generate_password_hash
@@ -146,6 +146,8 @@ class BillForm(FlaskForm):
     what = StringField(_("What?"), validators=[DataRequired()])
     payer = SelectField(_("Payer"), validators=[DataRequired()], coerce=int)
     amount = CalculatorStringField(_("Amount paid"), validators=[DataRequired()])
+    external_link = URLField(_("External link"), validators=[Optional(
+    )], description=_("A link to an external document, related to this bill"))
     payed_for = SelectMultipleField(_("For whom?"),
                                     validators=[DataRequired()], coerce=int)
     submit = SubmitField(_("Submit"))
@@ -155,6 +157,7 @@ def save(self, bill, project):
         bill.payer_id = self.payer.data
         bill.amount = self.amount.data
         bill.what = self.what.data
+        bill.external_link = self.external_link.data
         bill.date = self.date.data
         bill.owers = [Person.query.get(ower, project)
                       for ower in self.payed_for.data]
@@ -165,6 +168,7 @@ def fill(self, bill):
         self.payer.data = bill.payer_id
         self.amount.data = bill.amount
         self.what.data = bill.what
+        self.external_link.data = bill.external_link
         self.date.data = bill.date
         self.payed_for.data = [int(ower.id) for ower in bill.owers]
 
diff --git a/ihatemoney/messages.pot b/ihatemoney/messages.pot
index b88aa747c..d6401a568 100644
--- a/ihatemoney/messages.pot
+++ b/ihatemoney/messages.pot
@@ -60,6 +60,12 @@ msgstr ""
 msgid "Amount paid"
 msgstr ""
 
+msgid "External link"
+msgstr ""
+
+msgid "A link to an external document, related to this bill"
+msgstr ""
+
 msgid "For whom?"
 msgstr ""
 
@@ -412,6 +418,9 @@ msgstr ""
 msgid "each"
 msgstr ""
 
+msgid "see"
+msgstr ""
+
 msgid "No bills"
 msgstr ""
 
diff --git a/ihatemoney/migrations/versions/6c6fb2b7f229_.py b/ihatemoney/migrations/versions/6c6fb2b7f229_.py
new file mode 100644
index 000000000..0336f6c45
--- /dev/null
+++ b/ihatemoney/migrations/versions/6c6fb2b7f229_.py
@@ -0,0 +1,26 @@
+"""empty message
+
+Revision ID: 6c6fb2b7f229
+Revises: a67119aa3ee5
+Create Date: 2019-09-28 13:38:09.550747
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '6c6fb2b7f229'
+down_revision = 'a67119aa3ee5'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('bill', sa.Column('external_link', sa.UnicodeText(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('bill', 'external_link')
+    # ### end Alembic commands ###
diff --git a/ihatemoney/models.py b/ihatemoney/models.py
index 325cf5790..48e16a79a 100644
--- a/ihatemoney/models.py
+++ b/ihatemoney/models.py
@@ -327,6 +327,7 @@ def delete(self, project, id):
     date = db.Column(db.Date, default=datetime.now)
     creation_date = db.Column(db.Date, default=datetime.now)
     what = db.Column(db.UnicodeText)
+    external_link = db.Column(db.UnicodeText)
 
     archive = db.Column(db.Integer, db.ForeignKey("archive.id"))
 
@@ -340,6 +341,7 @@ def _to_serialize(self):
             "date": self.date,
             "creation_date": self.creation_date,
             "what": self.what,
+            "external_link": self.external_link,
         }
 
     def pay_each(self):
diff --git a/ihatemoney/static/css/main.css b/ihatemoney/static/css/main.css
index acc95a1a1..52bd77b28 100644
--- a/ihatemoney/static/css/main.css
+++ b/ihatemoney/static/css/main.css
@@ -32,7 +32,7 @@ body {
 
 @media (min-width: 992px) {
   .projects-item {
-    margin-left: auto!important;
+    margin-left: auto !important;
   }
 }
 
@@ -108,7 +108,6 @@ body {
   .identifier {
     margin-bottom: 0;
   }
-
 }
 
 #add-member-form {
@@ -132,7 +131,7 @@ body {
 
 /* Home */
 .home-container {
-  background: linear-gradient(150deg, #abe128 0%, #43CA61 100%);
+  background: linear-gradient(150deg, #abe128 0%, #43ca61 100%);
 }
 .home {
   padding-top: 1em;
@@ -146,7 +145,7 @@ body {
   min-width: 25em;
   border: 0;
   border-radius: 0;
-  box-shadow: 0px 0px 10px rgba(83, 88, 93, .40);
+  box-shadow: 0px 0px 10px rgba(83, 88, 93, 0.4);
   margin-right: 25px;
   margin-bottom: 20px;
   margin-left: 25px;
@@ -159,7 +158,6 @@ body {
 
 .empty-bill {
   margin-top: 5rem !important;
-
 }
 .empty-bill .card {
   border: 0;
@@ -240,7 +238,7 @@ footer .footer-right a {
 @-moz-document url-prefix() {
   /** Firefox style fix **/
   footer .footer-right a {
-    padding-top: 2px
+    padding-top: 2px;
   }
 }
 footer .footer-right a:hover {
@@ -290,7 +288,8 @@ footer .footer-left {
 }
 
 .bill-actions > .delete,
-.bill-actions > .edit {
+.bill-actions > .edit,
+.bill-actions > .see {
   font-size: 0px;
   display: block;
   width: 16px;
@@ -308,6 +307,10 @@ footer .footer-left {
   background: url("../images/edit.png") no-repeat right;
 }
 
+.bill-actions > .see {
+  background: url("../images/see.png") no-repeat right;
+}
+
 #bill_table {
   margin-top: 30px;
 }
@@ -483,4 +486,4 @@ footer .icon svg {
 }
 .icon.icon-white {
   fill: white;
-}
\ No newline at end of file
+}
diff --git a/ihatemoney/static/images/see.png b/ihatemoney/static/images/see.png
new file mode 100644
index 000000000..741e8292c
Binary files /dev/null and b/ihatemoney/static/images/see.png differ
diff --git a/ihatemoney/templates/forms.html b/ihatemoney/templates/forms.html
index a64e20554..c96921ca9 100644
--- a/ihatemoney/templates/forms.html
+++ b/ihatemoney/templates/forms.html
@@ -14,7 +14,7 @@
             {{ field(class=class, placeholder=placeholder) | safe }}
         {% endif %}
         {% if field.description %}
-            <p class="help-inline">{{ field.description }}</p>
+            <small id="{{field.name}}_description"" class="form-text text-muted">{{ field.description }}</small>
         {% endif %}
         </div>
     </div>
@@ -95,6 +95,7 @@
     {{ input(form.what, inline=True) }}
     {{ input(form.payer, inline=True, class="form-control custom-select") }}
     {{ input(form.amount, inline=True) }}
+    {{ input(form.external_link, inline=True) }}
 
     <div class="form-group row">
         <label class="col-3" for="payed_for">{{ _("For whom?") }}</label>
diff --git a/ihatemoney/templates/list_bills.html b/ihatemoney/templates/list_bills.html
index dddef4dc2..494969f10 100644
--- a/ihatemoney/templates/list_bills.html
+++ b/ihatemoney/templates/list_bills.html
@@ -134,6 +134,9 @@ <h3 class="modal-title">{{ _('Add a bill') }}</h3>
                 <td class="bill-actions">
                     <a class="edit" href="{{ url_for(".edit_bill", bill_id=bill.id) }}" title="{{ _("edit") }}">{{ _('edit') }}</a>
                     <a class="delete" href="{{ url_for(".delete_bill", bill_id=bill.id) }}" title="{{ _("delete") }}">{{ _('delete') }}</a>
+                    {% if bill.external_link %}
+                    <a class="see" href="{{ bill.external_link }}" ref="noopener" target="_blank" title="{{ _("see") }}">{{ _('see') }} </a>
+                    {% endif %}
                 </td>
         </tr>
         {% endfor %}
diff --git a/ihatemoney/tests/tests.py b/ihatemoney/tests/tests.py
index a7d70ce17..5043977ec 100644
--- a/ihatemoney/tests/tests.py
+++ b/ihatemoney/tests/tests.py
@@ -1282,6 +1282,7 @@ def test_bills(self):
             'payer': "1",
             'payed_for': ["1", "2"],
             'amount': '25',
+            'external_link': "https://raclette.fr"
         }, headers=self.get_auth("raclette"))
 
         # should return the id
@@ -1302,7 +1303,9 @@ def test_bills(self):
                 {"activated": True, "id": 2, "name": "fred", "weight": 1}],
             "amount": 25.0,
             "date": "2011-08-10",
-            "id": 1}
+            "id": 1,
+            'external_link': "https://raclette.fr"
+        }
 
         got = json.loads(req.data.decode('utf-8'))
         self.assertEqual(
@@ -1325,6 +1328,7 @@ def test_bills(self):
             'payer': "1",
             'payed_for': ["1", "2"],
             'amount': '25',
+            'external_link': "https://raclette.fr",
         }, headers=self.get_auth("raclette"))
 
         self.assertStatus(400, req)
@@ -1337,6 +1341,7 @@ def test_bills(self):
             'payer': "2",
             'payed_for': ["1", "2"],
             'amount': '25',
+            'external_link': "https://raclette.fr",
         }, headers=self.get_auth("raclette"))
 
         # check its fields
@@ -1355,7 +1360,9 @@ def test_bills(self):
                 {"activated": True, "id": 2, "name": "fred", "weight": 1}],
             "amount": 25.0,
             "date": "2011-09-10",
-            "id": 1}
+            'external_link': "https://raclette.fr",
+            "id": 1
+            }
 
         got = json.loads(req.data.decode('utf-8'))
         self.assertEqual(
@@ -1427,6 +1434,7 @@ def test_bills_with_calculation(self):
                 "amount": expected_amount,
                 "date": "2011-08-10",
                 "id": id,
+                "external_link": '',
             }
 
             got = json.loads(req.data.decode('utf-8'))
@@ -1538,7 +1546,9 @@ def test_weighted_bills(self):
                 {"activated": True, "id": 2, "name": "freddy familly", "weight": 4}],
             "amount": 25.0,
             "date": "2011-08-10",
-            "id": 1}
+            "id": 1,
+            "external_link": ''
+        }
         got = json.loads(req.data.decode('utf-8'))
         self.assertEqual(
             creation_date,
@@ -1603,7 +1613,7 @@ def test_generate_config(self):
     def test_generate_password_hash(self):
         cmd = GeneratePasswordHash()
         with patch('sys.stdout', new=six.StringIO()) as stdout, \
-             patch('getpass.getpass', new=lambda prompt: 'secret'): # NOQA
+             patch('getpass.getpass', new=lambda prompt: 'secret'):  # NOQA
             cmd.run()
             print(stdout.getvalue())
             self.assertEqual(len(stdout.getvalue().strip()), 189)
diff --git a/ihatemoney/translations/el/LC_MESSAGES/messages.po b/ihatemoney/translations/el/LC_MESSAGES/messages.po
index dbdb34182..14132161d 100644
--- a/ihatemoney/translations/el/LC_MESSAGES/messages.po
+++ b/ihatemoney/translations/el/LC_MESSAGES/messages.po
@@ -3,7 +3,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-09-30 23:53+0200\n"
+"POT-Creation-Date: 2019-10-01 21:48+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: Automatically generated\n"
 "Language: el\n"
@@ -76,6 +76,12 @@ msgstr ""
 msgid "Amount paid"
 msgstr ""
 
+msgid "External link"
+msgstr ""
+
+msgid "A link to an external document, related to this bill"
+msgstr ""
+
 msgid "For whom?"
 msgstr ""
 
@@ -428,6 +434,9 @@ msgstr ""
 msgid "each"
 msgstr ""
 
+msgid "see"
+msgstr ""
+
 msgid "No bills"
 msgstr ""
 
diff --git a/ihatemoney/translations/es_419/LC_MESSAGES/messages.po b/ihatemoney/translations/es_419/LC_MESSAGES/messages.po
index 91c0b9f69..e2e25ac28 100644
--- a/ihatemoney/translations/es_419/LC_MESSAGES/messages.po
+++ b/ihatemoney/translations/es_419/LC_MESSAGES/messages.po
@@ -3,7 +3,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-09-30 23:53+0200\n"
+"POT-Creation-Date: 2019-10-01 21:48+0200\n"
 "PO-Revision-Date: 2019-09-25 22:28+0000\n"
 "Last-Translator: Diego Caraballo <diegocaraballo84@gmail.com>\n"
 "Language: es_419\n"
@@ -81,6 +81,12 @@ msgstr "Paga"
 msgid "Amount paid"
 msgstr "Cantidad pagada"
 
+msgid "External link"
+msgstr ""
+
+msgid "A link to an external document, related to this bill"
+msgstr ""
+
 msgid "For whom?"
 msgstr "¿Para quién?"
 
@@ -443,6 +449,9 @@ msgstr ""
 msgid "each"
 msgstr "Cada"
 
+msgid "see"
+msgstr ""
+
 msgid "No bills"
 msgstr "Sin facturas"
 
diff --git a/ihatemoney/translations/fr/LC_MESSAGES/messages.po b/ihatemoney/translations/fr/LC_MESSAGES/messages.po
index b95e87d88..b8a2f21e0 100644
--- a/ihatemoney/translations/fr/LC_MESSAGES/messages.po
+++ b/ihatemoney/translations/fr/LC_MESSAGES/messages.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2019-09-30 23:53+0200\n"
+"POT-Creation-Date: 2019-10-01 21:48+0200\n"
 "PO-Revision-Date: 2019-09-24 15:13+0000\n"
 "Last-Translator: Alexis Metaireau <alexis@notmyidea.org>\n"
 "Language: fr\n"
@@ -85,6 +85,12 @@ msgstr "Payeur"
 msgid "Amount paid"
 msgstr "Montant"
 
+msgid "External link"
+msgstr "Lien externe"
+
+msgid "A link to an external document, related to this bill"
+msgstr "Un lien vers un document, lié à cette facture"
+
 msgid "For whom?"
 msgstr "Pour qui ?"
 
@@ -443,6 +449,9 @@ msgstr ""
 msgid "each"
 msgstr "chacun"
 
+msgid "see"
+msgstr ""
+
 msgid "No bills"
 msgstr "Pas encore de factures"
 
diff --git a/ihatemoney/translations/nb_NO/LC_MESSAGES/messages.po b/ihatemoney/translations/nb_NO/LC_MESSAGES/messages.po
index dc73bf5cb..d5b81c2f4 100644
--- a/ihatemoney/translations/nb_NO/LC_MESSAGES/messages.po
+++ b/ihatemoney/translations/nb_NO/LC_MESSAGES/messages.po
@@ -82,6 +82,12 @@ msgstr "Betaler"
 msgid "Amount paid"
 msgstr "Beløp betalt"
 
+msgid "External link"
+msgstr ""
+
+msgid "A link to an external document, related to this bill"
+msgstr ""
+
 msgid "For whom?"
 msgstr "For hvem?"
 
@@ -456,6 +462,9 @@ msgstr "Alle, unntagen %(excluded)s"
 msgid "each"
 msgstr "hver"
 
+msgid "see"
+msgstr ""
+
 msgid "No bills"
 msgstr "Ingen regninger"
 
diff --git a/ihatemoney/translations/nl/LC_MESSAGES/messages.po b/ihatemoney/translations/nl/LC_MESSAGES/messages.po
index b8cadb590..af798ca24 100644
--- a/ihatemoney/translations/nl/LC_MESSAGES/messages.po
+++ b/ihatemoney/translations/nl/LC_MESSAGES/messages.po
@@ -77,6 +77,12 @@ msgstr "Betaler"
 msgid "Amount paid"
 msgstr "Betaald bedrag"
 
+msgid "External link"
+msgstr ""
+
+msgid "A link to an external document, related to this bill"
+msgstr ""
+
 msgid "For whom?"
 msgstr "Aan wie?"
 
@@ -437,6 +443,9 @@ msgstr "Iedereen, behalve %(excluded)s"
 msgid "each"
 msgstr "per persoon"
 
+msgid "see"
+msgstr ""
+
 msgid "No bills"
 msgstr "Geen rekeningen"
 
diff --git a/ihatemoney/translations/tr/LC_MESSAGES/messages.po b/ihatemoney/translations/tr/LC_MESSAGES/messages.po
index 976903e70..c072285c5 100644
--- a/ihatemoney/translations/tr/LC_MESSAGES/messages.po
+++ b/ihatemoney/translations/tr/LC_MESSAGES/messages.po
@@ -3,7 +3,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-09-30 23:53+0200\n"
+"POT-Creation-Date: 2019-10-01 21:48+0200\n"
 "PO-Revision-Date: 2019-08-07 13:24+0000\n"
 "Last-Translator: Mesut Akcan <makcan@gmail.com>\n"
 "Language: tr\n"
@@ -81,6 +81,12 @@ msgstr "Mükellefi"
 msgid "Amount paid"
 msgstr "Ödenen tutar"
 
+msgid "External link"
+msgstr ""
+
+msgid "A link to an external document, related to this bill"
+msgstr ""
+
 msgid "For whom?"
 msgstr "Kim için?"
 
@@ -433,6 +439,9 @@ msgstr ""
 msgid "each"
 msgstr ""
 
+msgid "see"
+msgstr ""
+
 msgid "No bills"
 msgstr ""
 
diff --git a/ihatemoney/translations/zh_HANS-CN/LC_MESSAGES/messages.po b/ihatemoney/translations/zh_HANS-CN/LC_MESSAGES/messages.po
index 5836868dc..60b0fb171 100644
--- a/ihatemoney/translations/zh_HANS-CN/LC_MESSAGES/messages.po
+++ b/ihatemoney/translations/zh_HANS-CN/LC_MESSAGES/messages.po
@@ -3,7 +3,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-09-30 23:53+0200\n"
+"POT-Creation-Date: 2019-10-01 21:48+0200\n"
 "PO-Revision-Date: 2019-07-02 00:02+0000\n"
 "Last-Translator: Elizabeth Sherrock <lizzyd710@gmail.com>\n"
 "Language: zh_HANS_CN\n"
@@ -78,6 +78,12 @@ msgstr ""
 msgid "Amount paid"
 msgstr ""
 
+msgid "External link"
+msgstr ""
+
+msgid "A link to an external document, related to this bill"
+msgstr ""
+
 msgid "For whom?"
 msgstr ""
 
@@ -430,6 +436,9 @@ msgstr ""
 msgid "each"
 msgstr ""
 
+msgid "see"
+msgstr ""
+
 msgid "No bills"
 msgstr ""