Subscription Restriction Manager for WHMCS
Prevent Mixing Free Trials and Paid Plans in Cart

This WHMCS module enforces smart restrictions during checkout when users attempt to add both free trial and paid subscription products to the cart at the same time.

Without this module, clients can exploit the system by activating both a free trial and a paid plan simultaneously, which may result in duplicate activations, unexpected credit usage, or revenue loss.

With this module, if a client tries to mix a free trial and a paid subscription in the same order, checkout will be blocked with a clear warning message:

⚠️ Trial and Paid plans can’t be mixed in the same workspace. Please switch plans or contact support for assistance.

Key Features:

Prevents free trial and paid plans from being purchased together

Automatically shows a warning and blocks checkout if both are in cart

Protects against duplicate activations and credit loss

Helps enforce proper billing and subscription workflows

Easy to install and configure – no core file changes required

Ensure your billing system stays secure and profitable with this essential restriction module.