Change roles for new PMPro members to custom roles at checkout based on level. Add this code to your active theme's functions.php or a custom plugin.

pmpro-change-role-custom-roles.php

<?php
/*
	This code assumes you already have custom roles created
	for bronzemember, silvermember, and goldmember.
	Members signing up for membership level #1 get "Bronze Member" role.
	Members signing up for membership level #2 get "Silver Member" role.
	Members signing up for membership level #3 get "Gold Member" role.
	Members cancelling are given the subscriber role.
	Admin users are ignored.
*/
function my_pmpro_after_change_membership_level($level_id, $user_id)
{
	//get user object
	$wp_user_object = new WP_User($user_id);
  
	//ignore admins
	if(in_array("administrator", $wp_user_object->roles))
		return;

	if($level_id == 1)
	{
		//New member of level #1. Give them Bronze Member role.
		$wp_user_object->set_role('bronzemember');
	}
	elseif($level_id == 2)
	{
		//New member of level #2. Give them Silver Member role.
		$wp_user_object->set_role('silvermember');
	}
	elseif($level_id == 3)
	{
		//New member of level #3. Give them Gold Member role.
		$wp_user_object->set_role('goldmember');
	}
	elseif($level_id == 0)
	{
		//Cancelling. Give them Subscriber role.
		$wp_user_object->set_role('subscriber');
	}
}
add_action("pmpro_after_change_membership_level", "my_pmpro_after_change_membership_level", 10, 2);
?>

HI! It is not working for me. I have 2 custom roles from my theme.
After paying the role remains as suscriber.

Does it need another plugin?

I have the same situation @ivanguinea . Did you manage to resolve the issue?

@ivanguinea @codeclinic -> Open up a support thread on Paid Memberships Pro site for some assistance if you need.

This recipe is included in the blog post on "Give New Members Author Role" at Paid Memberships Pro here: https://www.paidmembershipspro.com/give-new-members-author-role/