Telkom will be introducing a "soft cap" for new and existing ADSL customers from 1 February 2013.
This effectively means customers reaching their internet cap will no longer be limited to local data. Instead, they will now also be able to access international sites.
"Removing this restriction signifies Telkom's continuous efforts to ensure it meets customer demands," the company said in a statement.
Instead of hitting a cap, customers will now have their speed throttled (slowed down) and some of their international activity shaped.
The company confirmed that data consumed outside of the soft cap will not be charged for.
Day-to-day activities such as email, banking and browsing will be given priority, whilst lower priority will be given to high usage applications such as file sharing and streaming services.
Telkom's existing uncapped packages will no longer be subjected to throttling as a result, although shaping will remain.