Period anchor
How a limit group decides when to reset. "calendar" resets on a fixed date (1st of month UTC). "subscription_start" resets on the user's subscription anniversary.
Last updated: 2026-05-10
Definition
Calendar-anchored periods give you predictable reset dates across all users - every quota resets on the 1st of the month. Subscription_start-anchored periods reset on each user's individual signup anniversary, which is friendlier for users who signed up mid-month. You can mix anchors per limit group; one plan might have monthly_renders on calendar and lifetime_credits on subscription_start.
Example
plan_free: monthly_renders on calendar (everyone resets Jan 1, Feb 1, Mar 1…) + lifetime_signup_bonus on subscription_start (never resets).
Related terms
Limit group
The basic unit of quota in AIPricingLab: a label, a unit, a quota, a period, and a list of match rules that decide which events count toward it.
GlossaryQuota
A hard or soft cap on a usage unit (tokens, renders, seconds, cents) over a period (daily, monthly, lifetime). The "100 / month" in "100 image renders / month".