JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Unfortunately our forms are only able to accept payment at the time of initial submission. You can allow for the user to return to the form to edit their submission, however this will not allow them to alter their payment.
You could setup a subscription based payment plan that would allow for your users to pay in installments:
However it is not possible to partial amounts towards a total through the form itself.
If you have any further questions, let us know and we will be happy to help.