Prepaid subscriptions on anchor-based plans no longer bill months early

Some Subi plans bill on a fixed set of anchor days rather than a rolling date counted from checkout, for example a plan billed once a year (a full year prepaid) on a plan configured with quarterly anchor days.

Previously, a contract created on such a plan had its first next billing date snapped forward to the next anchor day, regardless of how long the billing interval actually was. A customer who checked out on 2026-07-20 for a full year prepaid on a plan anchored quarterly (20 Jan/Apr/Jul/Oct) would have been billed again on 2026-10-20, three months later, instead of a year later as their prepaid plan intended.

The first next billing date for a contract like this is now set to the contract's creation date plus one full billing interval, so the year-long prepaid customer above is now correctly billed again on 2027-07-20 instead. When this correction applies, it's recorded on the subscription's own timeline, showing the date it was corrected from and to, so the change is visible in the contract's history.

This only affects new contracts whose billing interval doesn't line up with the plan's anchor spacing; contracts already billing on a matching schedule are unaffected.