What is a cost centre?
Published
A cost centre is an analytical dimension tagged onto an entry alongside its account: the account says what the spend was (rent), the centre says where/for whom (Riyadh branch). With it you get a P&L per branch, project, or department - from the same chart, without one additional account.
The example that explains everything
Al-Waha's 460,000 of sales across two branches, every entry tagged:
| Riyadh | Jeddah | Total | |
|---|---|---|---|
| Revenue | 290,000 | 170,000 | 460,000 |
| Cost of sales | (166,000) | (102,000) | (268,000) |
| Gross profit | 124,000 | 68,000 | 192,000 |
| Branch direct expenses | (78,500) | (54,250) | (132,750) |
| Branch profit before shared costs | 45,500 | 13,750 | 59,250 |
| Shared costs (unallocated) | (28,000) | ||
| Operating profit | 31,250 |
The reading: Jeddah delivers 37% of sales but only 23% of branch profit - a management question invisible in the combined statement. And note the "unallocated shared" line: showing it honestly beats spreading it arbitrarily - see cost allocation.
Usage rules
- Start small: branches or product lines - not twenty centres on day one.
- Mandatory tagging on revenue and direct expense accounts, so "no centre" doesn't fill up.
- Centres for analysis, accounts for statements - mixing them is the chart-bloat disease described on that page.
Frequently asked questions
Cost centre or branch in the system?
A branch is an operational entity (a warehouse, perhaps an invoice series); a centre is purely analytical. A branch usually spawns its centre automatically - the reverse isn't required.
Do balance sheet accounts take centres?
In practice centres serve the P&L primarily - spreading assets and liabilities across centres is complexity that rarely pays for a small business.