Allocation accounts: how Business Central splits costs and income

What allocation accounts in Business Central are

An allocation account is not an account in the chart of accounts, and it never holds a balance. Think of it as a named rule. You pick it on a line in place of a G/L account. Then, when you generate the split or post the document, Business Central swaps it for the real accounts on its distribution lines.

The point is to stop people splitting invoices by hand. A shared software plan, a rent bill or a group insurance policy goes in as one line. The rule then decides how much each department, location or project carries. The logic lives in one place, so a change there fixes every future split.

Create a fixed allocation account

Open the Allocation Accounts page and add a new account. Give it a number and a name that people will know. Set Account Type to Fixed. In the distribution lines, enter each destination account and the share it should get. Add the dimension values that go with it, such as a department code.

Shares are relative. So you can enter headcount, square feet or plain proportions, and Business Central works out each line's part of the total. Use a fixed account when the basis rarely changes. When it does, edit the shares once. Then tell the people who code invoices that the rule has moved.

Variable shares for allocation accounts in Business Central

Set Account Type to Variable when the split should follow data that already lives in Business Central. Each distribution line then points at a breakdown account and a calculation period. When the allocation runs, it works out the share from that account's balance. You can filter by dimension if you need to.

The breakdown account can be a G/L account, such as revenue per department. A statistical account works too. Statistical accounts hold non-financial figures, such as staff counts or floor area. So you can keep headcount up to date there, and every allocation follows it from then on.

Use the account on journals and documents

In a general journal, choose Allocation Account as the account type and pick your rule. Then enter the amount as usual. On a purchase invoice or order, choose Allocation Account as the line type. The line shows the total. An action on the line then generates the split lines before posting, so you can look at them.

A second route keeps the G/L account on the line. This route uses the allocation account only to split across dimensions, through the allocation account field on the line. That suits a cost that always belongs to one expense account but several departments. Either way, test the rule on a sandbox invoice first.

When allocation accounts in Business Central fit best

Posting creates ordinary G/L entries on the destination accounts, with their dimensions. So financial reports and Power BI need no special handling. The allocation account itself does not appear in the ledger. If you want the origin to stay visible, keep the rule's name in the line description.

They are one of three allocation tools. Allocations on a recurring journal suit month-end clearing of a balance. The cost accounting module suits layered allocations kept outside the general ledger. Allocation accounts suit the moment of entry, when you must divide a single invoice or journal line as you key it.

Allocation accounts in Business Central: frequent questions

Do allocation accounts change the chart of accounts?

No. They live on their own page and never receive entries. Only the destination accounts on the distribution lines get postings. So your chart of accounts, account categories and financial report definitions stay as they were. That makes allocation accounts in Business Central a safe change to add, even in a live company.

Can one allocation account split across dimensions only?

Yes. Point every distribution line at the same G/L account. Then give each line a different dimension value. The expense stays in one account, while each department or location carries its part. That is often all a cost split needs. Your chart of accounts also stays short, because you add no new expense accounts.

What is a statistical account?

This account holds non-financial numbers, such as headcount, floor area or units. Statistical accounts have their own ledger and journal. Variable allocation accounts can read those figures as the basis for a split. Financial reports can also use them for ratios. So one set of figures can drive both your splits and your key ratios.

Can we see the split before the invoice is posted?

Yes. On a document line that uses an allocation account, the line actions include generating the lines from the allocation account. The single line is replaced with the calculated split. You can then inspect and adjust it before you post the document. So nobody has to trust the rule blindly on the first run.

What happens if the shares change mid-year?

Edit the distribution lines, and the new shares apply to everything you generate from then on. Entries that are already posted stay untouched. If earlier periods need a restatement, that is a separate correcting journal. Agree it first with whoever signs off the accounts. We can help you plan that change.

Related setup pages for allocation accounts in Business Central

Allocation accounts in Business Central depend on a clean chart of accounts and sensible dimensions. These pages explain those foundations. They also cover the neighboring tools for recurring and cost-based allocations. Read the dimensions guide first, then return here with a clear idea of which cost lines you want to split. For the product detail, see Business Central documentation on Microsoft Learn.