How long does it take to receive payments form the forms using Paypal?

I am using Paypal for a few of my forms for fee processing and I wanted to know how long it takes for the payments to deposit to my paypal account. 

As far as I know, it should be immediately after form submission. If you haven't receive anything yet, it might be an incomplete payment. 

Please check this guide to view incomplete payments:

http://www.jotform.com/help/564-how-to-view-incomplete-payments-of-your-payment-forms/

Also, please check this one to know what an incomplete payment is:

http://www.jotform.com/help/272-Paypal-Incomplete-Payments-FAQ

I would recommend you to enable Paypal IPN (Instant Payment Notification), which is a POST message sent by Paypal whenever a transaction is completed on their side:

http://www.jotform.com/help/276-How-to-Enable-IPN-for-Paypal

Let us know if you have more questions, and if you need anything else please open a new thread, we will be glad to assist you.