Frequently Asked Questions

Answers to many of the most common pre-sales questions


If you have a question not answered here, please contact our support team.

What is WHMCS?

WHMCS is an all-in-one client management, billing & support solution for online businesses. Handling everything from signup to termination, WHMCS is a powerful automation & support tool. To find out more, click here

Is WHMCS installed on my web server or hosted with you?

WHMCS is a self-hosted platform giving you complete control over your installation and customer data. If you need help getting it installed, one of our experts can assist you with installation. See our Services for more information.

What are the server requirements for WHMCS?

Providing your server can run PHP & MySQL applications you should be able to run WHMCS without any problems. However, please refer to our System Requirements for a detailed list of system requirements.

Can I customise my installation/make it match the rest of my website?

Yes absolutely. WHMCS has been designed to be easy to customise and integrate seamlessly into the rest of your website. The frontend - the part your clients get to see - is fully templated and all accessible for you edit and customise.


WHMCS is an automation platform that integrates with many of your favorite apps.

Is module X supported?

We have integrations with a lot of apps and third party services and the list is growing all the time. To see if a certain service provider you wish to use is supported, we recommend searching our Documentation and Marketplace.

What if a module I need is not integrated yet?

All of our APIs are open and accessible, and so it's easy to create additional modules for WHMCS. There's also lots of developers and companies out there who are familiar with the WHMCS platform and who offer services to create modules, so there's lots of help available.


WHMCS is a highly flexible and extensible platform for developers.

Can I integrate WHMCS with my existing systems?

Yes. WHMCS has as expansive API and hook system that enables you to perform actions inside and out of WHMCS. With hooks you can perform additional actions when events occur within WHMCS and using the API you can execute tasks within WHMCS triggered by other systems. To learn more visit our Developer Feature Tour.

I would like to create a module for WHMCS. How do I do it?

Our Developer Documentation is open and accessible to everyone. You can find it at In some cases, you may even qualify for a free development license. Contact our sales team to see if you're eligible.

Can I have an additional license key for our test server before going live?

Yes. We understand that businesses often like to test and stage updates to business critical systems and so all users on our Plus license plans or higher can request a Development License Key to use for a secondary installation in a private testing environment.


We back our product with top quality support, available 24x7.

How can I get support?

All of our licenses include access to free ticket based technical support that is offered 24 hours a day, 7 days a week. We also have lots of self-help resources available including extensive Documentation, User Guides & Tutorials.

How often are product updates released?

We are actively developing and improving the product all the time and we aim to release 3-4 major new releases every year, that's one every 3-4 months. In between major releases, there will often be maintenance releases that contain smaller updates and bug fixes.

Didn't find what you were looking for?

Please contact us and a member of our team will get back to you as soon as we can.

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