Skip to content


Repository files navigation

Amberdms Billing System (ABS)

** Please Note: I consider this project deprecated, the code remains here as a reference but is not active maintained **

Project Homepage

For more information including source code, issue tracker and documentation visit the project homepage:


The Amberdms Billing System (ABS) is an open source web application providing accounting, invoicing, service management and time keeping functions that are ideally suited for small and medium businesses as well as small ISPs and IT companies.

Business software is one of the more commonly neglected areas of open source, ABS is designed to fix this issue and deliver a solid accounting and billing platform for individuals and small-medium sized businesses.

Developments of ABS has come from a background of working with telecommunications companies and technology companies and the feature set reflects this - having said that, ABS is extremely flexible and with a range of features should be a good match for any business.

ABS includes double-entry accounting, but it's also entirely possible to use it as a billing system only and keep using another accounting system (such as one more targeted to your country's requirements) for the accounting.

Key Features

  • Double-entry accounting system with tax and financial reports.
  • Powerful invoicing with support for both LaTeX and HTML/CSS templates for PDF invoices.
  • Service billing support including features designed for billing for VoIP and ISP data services, including billing for usage based on Netflow and call records.
  • Supports bundling multiple services together to suit sale's teams desires for value added packages and bundles being sold to customers.
  • Time keeping and billing functions, designed for consultancy companies to bill project time to their customers.
  • Credit note support and management of customer account balances.
  • Generating good looking quotations and turning them into invoices when accepted.
  • Powerful customer record keeping features including multiple contacts, custom notes and documents and attribute store.
  • Flexible permissions system allowing easy control over staff access permissions of all application features.
  • API for allowing easy integration with payment gateways or other systems.
  • And much, much more... check out the latest release notes

Getting Started

Somewhat out of date documentation/manuals available at:

In particular, see the manual installation guide

Recommend downloading the current master branch from Github, rather than using a tarball, since bug fixes and contributions get merged, but not doing releases very often (if ever?) now.


AGPL web-based billing system providing accounting, service billing, time keeping and more.






No packages published

Contributors 4