Kimai is an open source PHP based time tracking system released under the GNU GPL.

This document describes:

  • System requirements for Kimai
  • Installation routine
  • Upgrade routine

Client browser support

Kimai is accessed through a web browser. Kimai supports the following web browsers:

  • Internet Explorer 11 and later
  • Microsoft Edge
  • Google Chrome (Windows, MacOS X, Linux)
  • Firefox (Windows, MacOS X, Linux)
  • Safari on MacOS X
  • and other compatible modern browsers

Server system requirements

Kimai requires a web server with a PHP environment and a database. The minimum system requirements for running Kimai are:

  • Webserver capable of running PHP applications (Apache, Nginx, IIS or other)
  • PHP between 5.5 and 7.3
  • Required PHP extensions: mysqli, iconv and xml
  • MySQL 4.3 or higher
  • more than 100 MB of disk space

The following requirements must be met on the server installation:

  • FTP or shell access to set the correct filesystem permissions.

MySQL environment

Kimai works with MySQL in the above mentioned versions. It will also work on compatible “drop-in” replacements like MariaDB or Percona.

MySQL required privileges

The MySQL user needs a least the following privileges on the Kimai database:


PHP environment

  • memory_limit set to at least 64M
  • max_execution_time set to at least 30s (60s recommended)
  • register_globals disabled
  • AllowOverride in the Apache configuration includes “Indexes” and “FileInfo” (see FAQ below)

PHP required extensions

Your PHP needs to support the following extensions. Install will check if these are available.

  • Please make sure all of these php modules are activated:
    • dom
    • mysqli
    • xml
    • zip
    • zlib
  • In case you want to make use of the SOAP API, please also activate this module:
    • soap

This is a basic setup for best performance and increased functionality:

  • Apache with mod_expires enabled
  • MySQL 5.5 or newer
  • PHP
    • version 7.0 or later
    • memory_limit set to at least 128M
    • max_execution_time set to at least 60s
    • max_input_vars set to at least 1500
  • Additional PHP extensions:
    • PHP opcode cache, i.e.: apc, xcache, eaccelerator, Zend Optimizer, wincache (in case of an IIS installation)
    • apcu caching (with at least 100 MB of memory available)
    • mbstring
  • PHP access to /dev/urandom or /dev/random on Unix-like platforms for increased security. Make sure to add /dev/random:/dev/urandom to open_basedir settings if you use it. If these paths are unavailable, Kimai will attempt to simulate random number generation. This is less secure, reduces performance and throws out warnings in the Kimai log.


If you have SSH access to your webserver, this is the recommended way of setting up Kimai:

Uncompress the zip file on the Document root of your web-server:

cd /var/www/
mkdir kimai
cd kimai

Replace 1.2.2 with the latest available release TAG

Important: If you use GIT to fetch the sources, use the following command:

cd /var/www/
git clone
git fetch
git checkout 1.2.2

Replace 1.2.2 with the latest available release TAG

In case you only have FTP or SFTP access to your hosting environment, you can still install Kimai, but you won’t easily be able to upgrade your installation once a new release is out.

Please note that this is not a recommended setup!

  • Uncompress locally
  • Delete all files except:
    • includes/autoconf.php
    • any self made invoice templates under extensions/ki_invoice/invoices/
    • any self written extensions under extensions/
  • Upload all files and subdirectories directly in your Document Root (where files that are served by your webserver are located).

Installation: further steps

Now access the web server using a web browser. You will be redirected to the Installer which will walk you through the steps for setting up Kimai for the first time.

It will check if your environment conforms to the minimum system requirements and gives you some suggestions on what to change in case there are any discrepancies.

  • Remove the install directory after the installation
  • Remove the updater directory after the installation

Installation on Ubuntu

  • Install apache (or any other webserver)
  • Install mysqli
  • Install php
  • Install additional required module php-xml with sudo apt-get install php-xml

Extract the Kimai release zip/tarball into a server directory accessible from the outside and navigate to this location using your browser. A step-by-step installation program is included with every new release of Kimai. Follow the instructions of the installer and correct missing or incorrect permissions using your FTP or shell account. If the step-by-step installer does not work, please report this error.

Installation with Softaculous

Kimai v1 can be installed with theS oftaculous Auto-Installer.

Get more information at

Installation FAQ

I cannot login after installation

After you removed the “install” directory you may login into Kimai using the following credentials:

  • user: admin
  • password: changeme

Change the administrator password using the settings dialog. Keeping “changeme” as your password is a major security implication!

Why do I get “500 Server error” when I navigate to Kimai?

If you are using Apache web server, check the Apache error log for specifics on the error. The cause might be some missing module, or some syntax error in your .htaccess file. The error log is usually located in /var/log/apache2 or /var/log/httpd. Check with your hosting provider if you are in doubt where the logs are located.