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Setting up posting groups in Business Central makes more sense when you start from the chart of accounts and work backwards. Define the KPIs your management wants to measure first, then design the chart of accounts, and finally configure the posting setup that delivers those numbers.
Posting groups apply to your master data such as vendors, customers, items, GL accounts, and bank accounts. They carry over to documents like sales orders, purchase orders, and production orders, where you can usually change them before posting.
When you post a document or journal, Business Central looks into the general posting setup, the inventory posting setup, and the VAT posting setup. These three are complex matrixes. It also checks the customer, vendor, bank account, or fixed asset posting groups to determine which accounts to use, and that determines where the entries land in your chart of accounts.
How the Posting Group Structure Works in Business Central
The posting group and posting setup structure in Business Central is genuinely complex. Most consultants and experts understand it as a flow that runs in one direction, and that is a useful way to map out how it operates day to day.
You have posting groups for vendors, customers, items, VAT, and business posting groups. These posting groups apply to your master data: vendors, customers, GL accounts, items, and so on.
When you create documents such as sales orders, purchase orders, or production orders, the posting setup and posting groups carry over to those documents. You can often change them at the document level.
From Documents and Journals to the Chart of Accounts
When you post the documents, journal lines are created. You can also create journal lines manually and add posting groups yourself. You can add them to:
- GL accounts
- Bank accounts
- Fixed assets
You can apply them in sales and purchase journals as well, where they come into the journal line automatically. Here too, you can change them.
When you post a document or journal, Business Central reacts based on what you are posting. It looks into:
- The general posting setup
- The inventory posting setup
- The VAT posting setup
These three are complex matrixes. For the rest, it looks into the customer, vendor, bank account, or fixed asset posting groups, where the accounts are defined that decide where the postings go. The combined setup determines exactly where the entries are posted in your chart of accounts.
Why You Should Set It Up in Reverse Order
While the posting flow runs in one direction, your setup work should run the other way. Start from the chart of accounts and work backwards.
Begin by asking your management which KPIs they want to measure and what is important to them. That tells you how your chart of accounts should be structured.
From there, work backwards. Figure out what your posting setup needs to be to end up with the right entries in your chart of accounts. Then decide what should come from your master data, including your vendors, customers, and the goods you are actually selling. Finally, that tells you how your posting groups should be defined.
Q&A
What is the correct order for setting up posting groups in Business Central?
Set up in reverse of how posting flows. Start with the chart of accounts based on the KPIs your management wants to measure, then define the posting setup, then the master data for vendors, customers, and goods, and finally the posting groups.
Which posting setups does Business Central use when you post a transaction?
Business Central looks into the general posting setup, the inventory posting setup, and the VAT posting setup, which are three complex matrixes. It also uses the customer, vendor, bank account, or fixed asset posting groups, depending on what you are posting.
Can you change posting groups on documents and journal lines?
Yes. Posting groups carry over from master data to documents and journal lines automatically, and you can change them before posting in most cases. You can also add them manually to journal lines for GL accounts, bank accounts, and fixed assets.
What determines where entries are posted in the chart of accounts?
The combination of posting groups and the relevant posting setup defines which accounts are used. This determines exactly where the entries land in your chart of accounts.