how much does it cost to have authorize.net on my form?

how much does it cost to have authorize.net on my form? 

You can see here more details on the fees of authorize.net:

https://www.authorize.net/solutions/merchantsolutions/pricing/ 

https://www.authorize.net/en-ANZ/pricing/ 

Also you can see the monthly limits associated with each of our pricing plans.

Let us know if we can assist you further.