Subscription billing: invoices, changes and trials

How subscription invoices work, why an issued invoice never changes, how upgrades and downgrades take effect, and what a trial includes.

Source: Docklify subscription billing rules, effective 9 Nov 2026. Review tier B — we re-check this page at least every 30 days.

Invoices never change after they are issued#

Every subscription invoice carries its own sequential number and lists what it charges for. Once an invoice is issued, its amounts are never edited — if something is wrong, we correct it with an adjustment or a credit note that references the original, so your records always show both the original and the correction. The invoice header (legal name, tax ID, address) comes from your billing profile; keep it current, because corrections to an issued invoice follow the same adjustment route rather than a reprint.

Plan changes and trials#

Upgrades take effect immediately, with the price difference prorated by the day for the rest of the current period. Downgrades take effect at the end of the current period by default, so you keep what you already paid for until the period ends. A trial runs for 14 days at the Pro tier with no card required, and no invoice is issued during a trial; if you convert, your organization, users, and data carry over exactly as they are — nothing is migrated or recreated.