When switching to a billing period

longer

shorter

than the time elapsed from the beginning of the current billing period, the user is transferred to a new billing period with the start date

the same as of the one the he switches from.

For example, a 1 month billing period starts on September 1. On September 15 a user switches to a 2 month billing period. He is then transferred to a 2 month billing period with the start date of September 1 and closure date of October 31.

of the day he switches to a new billing period on.

For example, a 2 month billing period starts on September 1. On October 5 a user switches to a 1 month billing period. The current 2 month billing period is interrupted, closed and a new billing period is open with the start date of October 5 and closure date of November 5.

Refunds for the interrupted billing period are calculated as described in refund formulas and subtracted from

new recurrent fees prorated to the time remaining to a new billing billing period closure.

new recurrent fees for a new billing period.

If the resulting amount is:

- negative, the account balance is credited the difference;
- positive, the difference is charged as additional recurrent fee.