Get a fiscal period
Returns the full detail of a single fiscal period by ID, including the period start and end
dates, status (open / closed / locked), and the user and timestamp of the most recent status
change. Locked periods prevent any new journal entries from being posted within them.
Requires accounting:read scope.
Authorizations
API key issued per entity via Settings > Developers > API Keys.
Each key carries scopes (e.g. orders:read, products:write).
Bearer token format: Authorization: Bearer ark_live_ent_Test keys use ark_test_ent_. Both are issued per entity
via Settings > Developers > API Keys.
Path Parameters
Response
Single fiscal period
An accounting period. Closed periods refuse new journal entry postings (Rule A3). Year-end closing entries that roll revenue and expense activity into retained earnings are posted via a separate explicit endpoint (POST /v1/accounting_periods/{id}/close-fiscal-year). The monthly-period close does NOT by itself post a retained-earnings rollover JE. Verified against live dev RDS accounting.accounting_periods.
Human-readable name (e.g. 'January 2025')
open, close_requested, closed NEW-GAP-REOPEN-PERIOD-ENTITY-ISOLATION-SOD-REASON-AUDIT (2026-05-15): operator-supplied justification from the most recent reopen. 10-500 chars when set. Cleared on next close.
User who most recently reopened this period.

