Next Billing Date

Next Billing Date refers to the date or time on which a subscription will get renewed and the payment will get collected. In Chargebee, billing date/time is a subscription specific attribute: it is based on the date or time of subscription activation and the billing frequency of the plan.

Example

Sign-up Date: Oct 1 (Monthly Plan) Next Billing Date: Nov 1

Sign-up Date: Oct 1 (Weekly Plan)
Next Billing Date: Oct 8

Sign-up Date: Oct 1, 2015 (Yearly Plan)
Next Billing Date: Oct 1, 2016

When there is a trial period associated with a plan, the subscription will get activated only after the trial ends. In this case, the billing date/time will be based on the activation date/time.

Example

Sign-up Date: Oct 1 (Monthly Plan with 15-day trial period) Activation Date: Oct 16 Next Billing Date: Nov 16

The billing date/time of a subscription can be altered in following ways:

The billing date/time of a subscription can be changed in the following ways:

Chargebee site: Navigate to the subscription details page and click Edit Next Billing Date in the Action panel.

Classic UI users

Here's how the Change Next Billing option is displayed:

Change Term End API : You can change the billing date/time of a subscription to postpone the date/time of renewal or bring it forward to suit the circumstance. If proration is enabled, then credits or charges are raised for the change. Further, when charges are raised, they may be invoiced immediately or added to unbilled charges.
Change Term End API: You can change the billing date/time of a subscription to postpone the renewal date/time or bring it forward to suit the circumstance. If proration is enabled, then credits or charges are raised for the change. When charges are raised, they may be invoiced immediately or added to unbilled charges.

Note:

The billing date/time of a subscription can only be changed when the subscription is in Active status.
For trial and future subscriptions, the billing date/time is not set. In these cases, you can only change the Trial End Date/time and the Start Date/time of the subscription, respectively.
For non-renewing subscriptions, the billing date/time is not set because the subscription will be canceled. In this case, you can change the cancellation date of the subscription.
Prorated credits or charges are applied to the subscription if you choose to do so.

If I change the next billing date/time, on what basis is the charge/credit per time-unit calculated?

If you change the next billing date/time, charges or credits are calculated as follows:

If you extend the subscription, the charge is calculated as: Charge = (Plan price ÷ Number of days in the plan billing period, assuming the plan starts from the current date) × Number of days extended.
If you reduce the length of the subscription, credits are calculated as: Credits = (Plan price ÷ Total number of days in the current term of the subscription) × Number of days reduced.

Note:

The above calculation is done to the millisecond if the billing mode set for Chargebee is millisecond-based.