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Welcome to the WHMCS Documentation. This is your one stop resource for everything WHMCS - covering everything from initial setup, to advanced customisation and API integration.

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Installing WHMCS

Upgrading

System Requirements

Importing Data

Payment Gateways

Server/Provisioning Modules

Domain Registrars

Fraud Protection

Customising WHMCS

Working with Templates

Action Hooks

API

Setup & Configuration

Automation Settings

Troubleshooting Tips

How To Guides

Reports

Report a Bug

Glossary

Forums

Looking for information on Version 6.0? Click here to visit the dedicated Version 6.0 documentation portal