---
id: object/page/100
type: object
title: Page 100 "Accounting Periods"
summary: Page 100 "Accounting Periods" in Base Application (Microsoft.Foundation.Period). Present since at least BC23, still in BC30, changed in BC27.
tier: official
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---

# Page 100 "Accounting Periods"

> Page 100 "Accounting Periods" in Base Application (Microsoft.Foundation.Period). Present since at least BC23, still in BC30, changed in BC27.

Base Application · Microsoft.Foundation.Period · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Foundation/Period/AccountingPeriods.Page.al) · facts from BC29

## Properties

| Property | Value |
|---|---|
| Caption | Accounting Periods |
| SourceTable | Accounting Period |
| PageType | List |
| UsageCategory | Administration |
| ApplicationArea | Basic, Suite |

## Fields on this page

Layout controls in source order, grouped by the container they sit in. Shows: the table field a control is bound to (or its expression as written); ToolTip: the control's own, else the bound field's (marked).

| Group | Control | Shows | ToolTip |
|---|---|---|---|
| Control1 | Starting Date | [Starting Date](../table/50.md#fields) | Specifies the date that the accounting period will begin. <small>from the table field</small> |
|  | Name | [Name](../table/50.md#fields) | Specifies the name of the accounting period. <small>from the table field</small> |
|  | New Fiscal Year | [New Fiscal Year](../table/50.md#fields) | Specifies whether to use the accounting period to start a fiscal year. <small>from the table field</small> |
|  | Closed | [Closed](../table/50.md#fields) | Specifies if the accounting period belongs to a closed fiscal year. <small>from the table field</small> |
|  | Date Locked | [Date Locked](../table/50.md#fields) | Specifies if you can change the starting date for the accounting period. <small>from the table field</small> |
|  | Inventory Period Closed | `InvtPeriod.IsInvtPeriodClosed(Rec."Starting Date")` | Specifies that the inventory period has been closed. |
|  | Average Cost Period | [Average Cost Period](../table/50.md#fields) | Specifies the period type that was used in the accounting period to calculate the average cost. <small>from the table field</small> |
|  | Average Cost Calc. Type | [Average Cost Calc. Type](../table/50.md#fields) | Specifies how the average cost for items in the accounting period was calculated. <small>from the table field</small> |

## Actions

| Group | Action | ToolTip | Runs |
|---|---|---|---|
| Processing | Inventory Period | Create an inventory period. An inventory period defines a period of time in which you can post changes to the inventory value. | [Page 5828 "Inventory Periods"](../page/5828.md) |
|  | Create Year | — | [Report 93 "Create Fiscal Year"](../report/93.md) |
|  | Close Year | Close the current fiscal year. A confirmation message will display that tells you which year will be closed. You cannot reopen the year after it has been closed. | [Codeunit 6 "Fiscal Year-Close"](../codeunit/6.md) |
| Reporting | Trial Balance by Period | Show the opening balance by general ledger account, the movements in the selected period of month, quarter, or year, and the resulting closing balance. | [Report 38 "Trial Balance by Period"](../report/38.md) |
|  | Trial Balance (Obsolete) <small>obsolete Pending 28.0; #if not CLEAN28</small> | Show the chart of accounts with balances and net changes. You can use the report at the close of an accounting period or fiscal year. | [Report 6 "Trial Balance"](../report/6.md) |
|  | Fiscal Year Balance | View balance sheet movements for a selected period. The report is useful at the close of an accounting period or fiscal year. | [Report 36 "Fiscal Year Balance"](../report/36.md) |

## Relations

- source table [Table 50 "Accounting Period"](../table/50.md)

## Pages and codeunits on this table

- [Table 50 "Accounting Period"](../table/50.md) (lookup page)

## Extended by

- [Page extension 4425 "EXR Accounting Periods"](../pageextension/4425.md)

## Recent changes

- 2026-08-04 [#9584 636017 Move report action tooltips to report objects (small areas)](../../changes/bcapps/9584.md) (main, BC30, refactor)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: BC27

## Documented on Microsoft Learn

- [Working with accounting periods and fiscal years](https://learn.microsoft.com/dynamics365/business-central/finance-accounting-periods-and-fiscal-years)
- [Accountant experiences in Business Central](https://learn.microsoft.com/dynamics365/business-central/finance-accounting)
- [Close accounting periods for a fiscal year](https://learn.microsoft.com/dynamics365/business-central/year-close-account-periods)
- [Close fiscal years and accounting periods](https://learn.microsoft.com/dynamics365/business-central/year-close-years-periods)
- [Post the year-end closing entry](https://learn.microsoft.com/dynamics365/business-central/year-how-post-year-end-close-entry)

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "page", object_name: "Accounting Periods")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.