Cost allocation is assigning a shared cost to the parts of a business that use it. A shared cost might be a central billing team, software or marketing that serves every location. You choose a driver that explains why the cost exists, such as revenue collected, new customers or headcount, and split the cost in proportion to it. Inside one entity, the allocation is a reporting split by class or location. Between separate entities, it is recorded as an intercompany charge in both sets of books. For related businesses, the IRS applies an arm's length standard, so agree the method with your CPA first.
What is cost allocation?
It is the split of one cost across the parts of the business that benefit from it. The total doesn't change. What changes is which location, program or entity carries each share. Done well, each location's profit and loss shows what it would really cost to run.
Which costs are usually shared?
- A central billing or collections team
- Finance and bookkeeping
- The CRM and other software
- Sales and marketing not tied to one site
- A head office or shared rent
Costs that clearly belong to one location should be charged to that location directly, not allocated.
How do you choose a driver?
Pick the measure that best explains why the cost exists, and keep it.
| Cost | Common driver |
|---|---|
| Billing and collections | Revenue collected |
| Sales | New customers |
| Software priced per user | Users at each location |
| Shared office | Headcount or square feet |
What does an allocation look like with numbers?
A worked example. A billing team and software cost $18,000 a month, split by revenue collected in August:
| Location | Collected | Share | Allocated |
|---|---|---|---|
| Denver | $184,200 | 34.9% | $6,282 |
| Phoenix | $139,900 | 26.5% | $4,771 |
| Portland | $203,700 | 38.6% | $6,947 |
| Total | $527,800 | 100% | $18,000 |
Each share is the location's collections divided by $527,800, times $18,000, rounded to the dollar.
How is it recorded inside one entity?
If the locations share one legal entity and one set of books, the allocation is a reporting split. Post the cost with a class or location, or move it with a journal entry from a "Shared" class to each location's class. The entity's total expense stays the same. See QuickBooks class tracking.
How is it recorded between separate entities?
If each location is its own entity, one entity usually pays the bill and charges the others. That is an intercompany transaction, recorded in both sets of books on the same date for the same amount. In the example, Denver's books show a $6,282 expense and a payable to the entity that paid. That entity shows a $6,282 receivable and either a cost reimbursement or management fee income.
Does the IRS care how related entities split costs?
It can. Section 482 of the tax code lets the IRS adjust income between businesses under common control. The regulation's standard is "that of a taxpayer dealing at arm's length with an uncontrolled taxpayer." For services, a separate rule lists the methods, including a services cost method that charges certain eligible services at cost with no markup. Whether your shared costs qualify is a question for your CPA.
What goes wrong most often?
- Changing the driver when one location has a bad month.
- Allocating costs that belong to one location.
- Recording only one side of an intercompany charge, so the two sets of books never agree.
Write the method down. Your CPA, your lenders and any buyer of a location will ask how it works.
General information, not accounting or tax advice.
- 26 CFR 1.482-1, Allocation of income and deductions among taxpayers (Cornell LII)
- 26 CFR 1.482-9, Controlled services transactions (Cornell LII)
- QuickBooks: Turn on class tracking
Every figure on this page was checked against these sources on Oct 6, 2026. General information, not legal or tax advice.