---
title: "GL Periods | GTX Bookkeeping"
slug: "gl-periods"
description: "Learn about GL Periods in Marlin GTX trusted automotive software by Megabus."
tags: ["Marlin GTX"]
updated: 2025-08-26T04:25:57Z
published: 2025-08-26T04:25:57Z
canonical: "help.megabus.com.au/gl-periods"
---
> ## Documentation Index
> Fetch the complete documentation index at: https://help.megabus.com.au/llms.txt
> Use this file to discover all available pages before exploring further.
# GL Periods
**{{variable.GTX Bold}}** uses GL Periods to manage financial reporting.
The financial year is divided into **12 periods**, usually aligned to either July–June or January–December (or April–March in New Zealand), depending on your business setup.
The **Current GL Period** updates each time you run the [End Of Month](/gtx/docs/end-of-month) close-off, so that transactions post to the correct period.
Some transactions (such as purchases or journals) can still be **back-dated** to previous, open periods, to account for late payments and other delayed transactions.
Once all transactions for a period have been finalised, you should [close the period](/gtx/docs/gl-periods#closing-gl-periods) to prevent errors.
If enabled, closed GL periods can be [re-opened](/gtx/docs/gl-periods#reopening-gl-periods) to allow further postings, if required.
Closing and re-opening GL periods is usually managed by a **bookkeeper**.
| GL Period | Jul–Jun | Jan–Dec | NZ Apr–Mar |
| --- | --- | --- | --- |
| **1** | July | January | April |
| **2** | August | February | May |
| **3** | September | March | June |
| **4** | October | April | July |
| **5** | November | May | August |
| **6** | December | June | September |
| **7** | January | July | October |
| **8** | February | August | November |
| **9** | March | September | December |
| **10** | April | October | January |
| **11** | May | November | February |
| **12** | June | December | March |
| **13** | EOFY | EOFY | EOFY |
:::(Error) (Example)
**If your financial year runs from July–June:** March transactions post to **GL Period 9**.
Running the EOM close-off at the end of March moves the system into **GL Period 10 (April)** so that new sales post there.
:::
:::(Info) (Note)
**Period 13** is a special GL period to facilitate the [End of Year](/gtx/docs/end-of-financial-year-eofy) close-off process, and is entered into after the final End of Month Close off is run for the financial year.
You will **not be able to trade** while in Period 13, until the EOY cose-off is run and the GL is **reset to the first period** for the new financial year.
:::
## Current GL Periods
You can check which GL period your system is currently in by selecting **Help > About Marlin GTX** from the menu bar.
The About Marlin window will open, showing **Current GL Period**, along with other system information.
## Closing GL Periods
GL periods are left open after performing the **End of Month** close-off, to allow transactions to be back-dated, if necessary.
Once all transactions for a period have been finalised, the period needs to be **manually closed**, to prevent further transactions from being posted to it.
**To close a GL period:**
* Select **System > System Files > General Ledger > Manage GL Period**
The **Close GL Period** pop-up will open.
Select the **most recent period you want to close** from the drop-down at the bottom:
* This closes **that period** and **all earlier ones**
* **To select a period from the previous financial year:** Tick the **Last Year** checkbox
* Click **Start** and confirm the pop-up
### Reopening GL Periods
If enabled for your system, closed GL periods can be re-opened to allow further postings, if required.
In this case, GL periods can be re-opened by **closing the period(s) before them**.
**To reopen a closed GL period:**
* Select **System > System Files > General Ledger > Manage GL Period**
The **Close GL Period** pop-up will open.
Select the **most recent period you want to close** from the drop-down at the bottom:
* This will **open all GL periods after that one**
* **To select a period from the previous financial year:** Tick the **Last Year** checkbox
* Click **Start** and confirm the pop-up
:::(Error) (Example)
**If it is April and you need to reopen March:** Select **February** from the list.
This will close all GL periods up to and including February, and re-open those from March onwards.
:::
When you are finished working with the re-opened GL period, remember to [re-close the period](/gtx/docs/gl-periods#closing-gl-periods) up to the original close date, as usual.
:::(Warning) (Tip)
**To confirm the re-opened period:** Select **System > System Files > General Ledger > Manage GL Period** again.
The period you re-opened will now be shown in the **Last Open GL Period** field.
**Note:** "Last" in this context means the earliest, not the most recent.
:::
:::(Info) (Note)
To reopen GL periods, you must have **level 9** [password group access](https://help.megabus.com.au/gtx/docs/password-groups) for **Close GL Period Maintenance**.
**If re-opening GL periods is not enabled in your system:** Please send written authorisation from an Owner/Franchisee, Manager, or Bookkeeper to support@megabus.com.au, or [log a support ticket](/gtx/docs/log-a-support-ticket), by selecting Help > Log A Support Call from the menu bar.
:::