The business made money this year. Which part of it did?
For anyone running more than one thing — two shops, a counter and an online channel, three sites, a couple of vehicles — that question usually has no answer in the books, because the books were never asked to keep the parts apart.
The average is the number that describes nothing
One profit figure across three shops tells you the average shop is fine. There may be no average shop. There may be two that carry the business and one that has been quietly eating the difference for three years, and nothing in a combined statement will ever say so.
This is the specific way small businesses lose money without noticing: not a dramatic loss, but a good branch subsidising a bad one, invisibly, because the only report anyone looks at adds them together.
A cost centre is just a label
Nothing more technical than that. A name you attach to a document so it can be counted separately later. Shop 1 and Shop 2. A site. A vehicle. Counter and online. A single large job you want to see the truth about after it ends.
Pick names you would actually say out loud. The label has to be obvious to whoever is raising the invoice, or it will not get picked, and a tag that is not applied is worse than no tag — it makes the report look complete when it is not.
Revenue is the easy half
Sales tag themselves, near enough. The invoice is being raised anyway and the centre is one more field on a screen someone is already looking at.
Costs are where this succeeds or fails. An untagged expense does not disappear from the business, it just disappears from the branch, and the branch then looks far more profitable than it is. A cost centre report where revenue is tagged and costs are not is not an incomplete report — it is a misleading one.
How this works in BizGST Pro
You create centres by name on the Cost Centers screen. The field then appears on the invoice screen and on the expense screen, including recurring expenses, so tagging happens as part of the work rather than as a monthly clean-up.
The Cost Centers screen is the roll-up. Over a date range — it opens on the current financial year through today, and you can change both ends — each centre shows revenue from its invoices, cost from its expenses, the margin between them, and that margin as a percentage of revenue. Cancelled invoices are left out.
The untagged row is the point
Underneath the centres there is a row for everything that carries no tag at all, and it is shown rather than hidden. That row is the honesty check: while it is large, the split above it is not yet describing your business. It shrinking month by month is the sign the habit is forming.
What it does not do
Two limits, both worth knowing before you rely on the numbers.
- The cost side counts expenses, not purchase bills. For a trading business that means the cost of the goods themselves is not in this margin — what you get is revenue against running costs, which is a real and useful number, but it is not gross profit and should not be read as one.
- A document carries one centre. An invoice that genuinely belongs to two shops cannot be split down the middle here; it lands wherever you tag it.
Neither is a reason to skip it. A rough split that exists beats an exact split that does not — but know which number you are holding before you make a decision with it.
The decision it enables
Closing something is a hard call and nobody makes it off one report. But the conversation changes completely once the loss has a name and a number instead of being a feeling about which shop seems busier. Usually the surprise is not which one is losing — it is how long it has been.