# Accounting Periods

`GET /accounting/accounting-periods`

Group: Accounting › Accounting Periods · Operation ID: `accountingPeriods`

Returns a list of accounting periods, one per (entity, book, period). To read one with its close checklist, use GET accounting/accounting-periods/:id.

[Open in the interactive reference](https://docs.api.lensing.ai/?op=accountingPeriods)

## Parameters

| Name | In | Type | Required | Description |
| --- | --- | --- | --- | --- |
| `Api-Version` | header | `"v1"` | yes | The API version this request targets, named by its public identifier. Required on every request; omitting it, or naming a version this company does not have, is answered with 400. This document describes version `v1`. |

## Query surface

- `id` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `accountingPeriodId` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `entityId` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `bookId` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `fiscalCalendarId` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `periodName` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `fiscalYear` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `fiscalQuarter` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `startDate` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `endDate` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `status` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `reopenedByCascade` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `durationDays` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `hasTransactions` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `postable` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- `lastModifiedDate` — filter by eq, ne, gt, gte, lt, lte, in, notIn, between, like
- Orderable: id, periodName, fiscalYear, fiscalQuarter, startDate, endDate, status, durationDays, postable, lastModifiedDate
- Selectable: id, accountingPeriodId, entityId, entityName, bookId, bookName, fiscalCalendarId, fiscalCalendarName, periodName, fiscalYear, fiscalQuarter, startDate, endDate, status, reopeningReason, reopenedByCascade, durationDays, hasTransactions, postable, postableReason, lastModifiedDate

## Response

`200` Success

Under `data`, an array of accountingPeriodsRow:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `id` | string | no | The unique identifier for this entity-book accounting period row. This identifies the (entity, book, period) combination, not the shared accounting period. |
| `accountingPeriodId` | string or null | no | The identifier of the underlying accounting period, shared by every entity that uses this fiscal calendar. See id on GET accounting/accounting-periods/:id. |
| `entityId` | string or null | no | The identifier of the legal entity this status belongs to. See id on GET base/entities. Absent only when the entity-book link is broken. |
| `entityName` | string or null | no | The name of the legal entity this status belongs to. |
| `bookId` | string or null | no | The identifier of the accounting book this status belongs to. A period is opened and closed per book. See id on GET accounting/books/:id. |
| `bookName` | string or null | no | The name of the accounting book this status belongs to. |
| `fiscalCalendarId` | string or null | no | The identifier of the fiscal calendar this period belongs to. See id on GET accounting/fiscal-calendars/:id. Absent when the period was deleted from under its status row. |
| `fiscalCalendarName` | string or null | no | The name of the fiscal calendar this period belongs to. |
| `periodName` | string or null | no | The display name of the period as its fiscal calendar defines it, for example 'Jan 2026'. The format varies by calendar, so do not parse it. Match on dates instead. |
| `fiscalYear` | string or null | no | The fiscal year label this period belongs to, for example 'FY2024'. Set by the calendar, so it need not match the calendar year of startDate. |
| `fiscalQuarter` | string or null | no | The fiscal quarter label this period belongs to, for example 'Q1 2026'. |
| `startDate` | string (date) or null | no | The first day of the period, inclusive. Format YYYY-MM-DD. Absent only when the underlying period was deleted. |
| `endDate` | string (date) or null | no | The last day of the period, inclusive. Format YYYY-MM-DD. |
| `status` | string | no | The status this entity and book have put the period in. Possible values: 'created' (generated, not yet opened), 'open', 'closed', 'reopened'. Only 'open' and 'reopened' accept postings. |
| `reopeningReason` | string or null | no | The free-text reason recorded when the period was reopened. Set only when status is 'reopened'. |
| `reopenedByCascade` | boolean or null | no | Whether this period was reopened as a side effect of reopening a later one, rather than directly. |
| `durationDays` | number or null | no | The number of days the period spans, both bounds inclusive. Absent when startDate or endDate is. |
| `hasTransactions` | boolean or null | no | Whether at least one journal entry line has been posted into the underlying period, by any entity. |
| `postable` | boolean or null | no | Whether the period currently accepts postings for this entity and book, true when its status is 'open' or 'reopened'. This does not account for journal-type-specific locks. |
| `postableReason` | string or null | no | Why the period does not accept postings, for example 'status is closed'. Empty when it is postable. |
| `lastModifiedDate` | string (date-time) | no | The date and time this status row last changed, in UTC. Format YYYY-MM-DDTHH:mm:ss.sssZ. It changes when the period is opened, closed or reopened for this entity and book. |

## Statuses

- `400` — Invalid request or business failure
- `401` — Missing or invalid access token
- `403` — Not authorized
- `404` — Not found
- `429` — Too many requests
- `500` — Internal server error