WHMCS Modules

SOFORT / Klarna Gateway for WHMCS
With this module you can accept payments via SOFORT.
Docdata Gateway for WHMCS
With this module you can accept payments via Docdata.
Micropayment (Call2Pay) Gateway for WHMCS
With this module you can accept payments via Micropayment.

At gateway configuration it is possible to set a gateway fee which will be added to the invoice.
SEPA.NET Gateway for WHMCS
You are looking for a solution with which you can make regular payments without great effort? SEPA.net handles your payments online using the direct debit procedure. Clients pay at SEPA.net with their bank account.

This does also work for recurring payments like for hosting products. The client just need to activate once the sepa gateway and all upcoming invoices will be charged from the provider side - without assistence of the client.

That increases the payment rate dramatically because there is no need for interaction from the client to get his invoice payed.