Hi,

In Zoho billing, we offer upgrades, downgrades, suspends, and resumes.  We use online payment for most subscriptions, but have only a few that are offline, but we treat them the same either way..

We prorate only parts of these changes..   Right now zoho billing prorates both the unused part of the old plan and the unused part of the new plan, but we need to only prorate the upgrade/new plan and NOT issue a credit for the unused old plan..

Examples:

Plan A (suspend) fee $10/mo -> Upgrade to active plan of $100/mo on Feb 14..  NO credit from the $10 suspend fee, but 50% proration for the $100/mo new fee.  So customer pays $10 on Feb 1 for their lower suspend plan, and pays $50 on Feb 14 for the upgrade, for a total of $60 for the month of Feb.

How can we do this automatically with Zoho Billing?

If customer drops to lower plan or suspends service, we only do that at the end of the billing period and no proration occurs at all.  Note: we do calendar month billing for all subscriptions.