Hi guys,
please, how much would you charge to integrate a payment portal for an already existing website?

@op

Depending on the type you want from 70k upwards
gtb is 75k , interswitch 120k, quick teller 100k

you can call to confirm.

Thanks but the client has gotten the API from his bank already.
All I just need is to work with what he gave me.
So,how much is reasonable as a webmaster fee in this our country Nigeria?

PasNet:
@op

Depending on the type you want from 70k upwards
gtb is 75k , interswitch 120k, quick teller 100k

you can call to confirm.

I actually don't mean what I "want".
I mean what should I charge suppose I want to use any of the above payment portal u mentioned as a webmaster fee?

Give him a service of work document enumerating the process, have a rate per hour charge ,calculate the total, developers charge on basis of expertise level, I can't give u a rate, u know ur worth so be the judge.xheers