Depending on your objectives, there are different rates for the short code. It is up to the company to choose the pricing (for dedicated short codes only).
The short number 36 20 is the price of a local call, for the caller. This is the lowest rate, exactly the same as calling your neighbour on their landline.
The charge for the caller is up to you:
totally free, (free service and call)
local, (free service, and local call charges)
paying (from 0,05€TTC to 0,80€TTC / minute or from 0,05€ to 3,00€TTC / call)
The annual subscription for a number is €40,000 (Arcep tax), to which must be added, for the first year alone, a set-up cost of between €8 and €10,000.
The operator subscription (in addition to the Arcep tax), differs according to each operator