diff --git a/modules/timesheet_cost/CHANGELOG b/modules/timesheet_cost/CHANGELOG
index 60d350ebdd..6632bd97cd 100644
--- a/modules/timesheet_cost/CHANGELOG
+++ b/modules/timesheet_cost/CHANGELOG
@@ -38,61 +38,80 @@ Version 6.6.0 - 2022-10-31
 * Bug fixes (see mercurial logs for details)
 
 Version 6.4.0 - 2022-05-02
+--------------------------
 * Bug fixes (see mercurial logs for details)
 * Add support for Python 3.10
 * Remove support for Python 3.6
 
 Version 6.2.0 - 2021-11-01
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 6.0.0 - 2021-05-03
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 5.8.0 - 2020-11-02
+--------------------------
 * Bug fixes (see mercurial logs for details)
 * Remove support for Python 3.5
 
 Version 5.6.0 - 2020-05-04
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 5.4.0 - 2019-11-04
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 5.2.0 - 2019-05-06
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 5.0.0 - 2018-10-01
+--------------------------
 * Bug fixes (see mercurial logs for details)
 * Remove support for Python 2.7
 
 Version 4.8.0 - 2018-04-23
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 4.6.0 - 2017-10-30
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 4.4.0 - 2017-05-01
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 4.2.0 - 2016-11-28
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 4.0.0 - 2016-05-02
+--------------------------
 * Bug fixes (see mercurial logs for details)
 * Add Python3 support
 
 Version 3.8.0 - 2015-11-02
+--------------------------
 * Bug fixes (see mercurial logs for details)
 * Store cost price on timesheet line
 
 Version 3.6.0 - 2015-04-20
+--------------------------
 * Bug fixes (see mercurial logs for details)
 * Add support for PyPy
+
 Version 3.4.0 - 2014-10-20
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 3.2.0 - 2014-04-21
+--------------------------
 * Bug fixes (see mercurial logs for details)
 
 Version 3.0.0 - 2013-10-21
+--------------------------
 * Initial release
diff --git a/modules/timesheet_cost/doc/design.rst b/modules/timesheet_cost/doc/design.rst
new file mode 100644
index 0000000000..51f1c2433f
--- /dev/null
+++ b/modules/timesheet_cost/doc/design.rst
@@ -0,0 +1,32 @@
+******
+Design
+******
+
+The *Timesheet Cost Module* introduces or extends the following concepts:
+
+.. _model-timesheet.line:
+
+Timesheet Line
+==============
+
+When the *Timesheet Line Cost Module* is activated, the timesheet lines gains
+new properties that automatically store the cost price of the `employee
+<company:model-company.employee>` for the given date.
+
+.. seealso::
+
+   The `Timesheet Lines <timesheet:model-timesheet.line>` concept is introduced
+   by the :doc:`Timesheet Module <timesheet:index>`.
+
+.. _model-company.employee:
+
+Employee
+========
+
+When the *Timesheet Line Cost Module* is activated, the employee gains the
+ability to record changes in cost price over time.
+
+.. seealso::
+
+   The `Employee <company:model-company.employee>` concept is introduced by the
+   :doc:`Company Module <company:index>`.
diff --git a/modules/timesheet_cost/doc/index.rst b/modules/timesheet_cost/doc/index.rst
index 2a19ea1326..950a95c656 100644
--- a/modules/timesheet_cost/doc/index.rst
+++ b/modules/timesheet_cost/doc/index.rst
@@ -1,4 +1,12 @@
+#####################
 Timesheet Cost Module
 #####################
 
-The timesheet cost module adds cost price per employee.
+The *Timesheet Cost Module* stores the cost price of each employee on each
+timesheet line.
+
+.. toctree::
+    :maxdepth: 2
+
+    design
+    releases
diff --git a/modules/timesheet_cost/doc/releases.rst b/modules/timesheet_cost/doc/releases.rst
new file mode 100644
index 0000000000..21b13c4745
--- /dev/null
+++ b/modules/timesheet_cost/doc/releases.rst
@@ -0,0 +1,7 @@
+.. _releases-index:
+
+=============
+Release notes
+=============
+
+.. include:: ../CHANGELOG