There are no additional call charges from the IVR Menu platform out to your answer points. Often, a telco will charge an extra call rate simply because the IVR Menu or Auto Attendant is on a separate network. The SkyBooth IVR Menu is on the same network as your 1300 1800 number therefore you only have one call charge, that is the normal call charge that would normally apply to the 1300 or 1800 number as if it was landing directly to the end answer point without the IVR Menu being in place. For example, if you have keypress 1 landing to a mobile, then the call rate will be the same as the 1300 itself landed directly to that mobile line.
If the call never leaves the IVR Menu, then the local call rate of the 1300 1800 number service applies.