Insights
How do I track AI costs in QuickBooks Online?
To track AI costs in QuickBooks Online, create a dedicated AI services expense account, turn on Classes to tag each line with the department whose agents consumed the spend, use Customers or Projects for client-billable usage, book metered usage as a month-end journal entry, and enter the provider bill against the accrual when it arrives. QBO has everything needed; the work is deciding the structure before the first bill.
Set up the structure once
- Chart of Accounts. Add an expense account "AI Services." If volume justifies it, add sub-accounts: "Model inference," "Agent tools," "AI subscriptions." Add a current liability "Accrued AI Services."
- Classes. Enable class tracking (Settings → Advanced) and create one class per department that runs agents. Set "one class per transaction line" so a single journal entry can hit several departments.
- Customers and Projects. If agents do client work, tag usage to the Customer or Project so it can be invoiced or at least reported by client.
- Vendors. One vendor per provider (OpenAI, Anthropic, Google, your gateway). Attach the rate card to the vendor record as a note.
- Products and Services (optional). If you bill clients for AI usage, create a service item "AI usage" mapped to an income account so it appears on their invoices.
The monthly cycle
Step 1, month end: accrue metered usage. Journal entry: debit AI Services by class, credit Accrued AI Services.
Step 2, bill arrives: enter the bill. Enter the vendor bill coded to AI Services. Then post a reversing journal entry for the accrual, or use QBO's reversing-entry option when creating the accrual so it auto-reverses on the first of the next month.
Step 3, true-up. The difference between accrual and bill stays in AI Services, split by class in proportion to the accrual.
Worked example
September metered usage: $1,900 total. Marketing (class) $1,100, Operations $800. Provider bill arrives October 5 for $1,940.
September 30 journal entry (set to reverse October 1)
| Line | Account | Debit | Credit | Class |
|---|---|---|---|---|
| 1 | AI Services | 1,100.00 | Marketing | |
| 2 | AI Services | 800.00 | Operations | |
| 3 | Accrued AI Services | 1,900.00 |
October 1 (auto-reversal): the mirror image of the above.
October 5, Bill from OpenAI, $1,940.00
| Line | Account | Amount | Class |
|---|---|---|---|
| 1 | AI Services | 1,123.16 | Marketing |
| 2 | AI Services | 816.84 | Operations |
Net September expense booked: $1,900 (accrual). Net October expense: $40 (true-up), split $23.16 / $16.84 to match the accrual.
Reports that then work
- Profit and Loss by Class shows AI Services per department.
- Transaction Detail by Account on AI Services gives the audit trail.
- Unbilled charges by Customer if usage is tagged to clients.
Limits to know
QBO classes are one dimension. If you need department and project and agent, use Class for department, Customer/Project for the client, and put the agent name in the line description or memo so it is searchable. Journal entries can be imported from a CSV or posted through the QBO API, which is how a metering system hands the accrual to the books each month.
Related
How do I account for AI agent spend in the general ledger? · What is the journal entry for AI token usage?
Menu locations and feature names reflect QuickBooks Online as of this writing and vary by plan. Confirm account structure with your accountant.
Not sure which of your AI costs are being booked? Run the free Agent Spend Assessment.
Onaro Meridian is FinOps for agentic AI: the system of record that attributes, controls and books what AI agents spend.
Brian Diamond
Brian Diamond is a fractional Chief AI Officer and founder of Onaro. He has spent 30 years running infrastructure operations and founded LANStatus, a Connecticut managed services provider and Microsoft partner, in 2001. He holds a Chief AI Officer certification and writes the CAIO Brief on AI leadership for finance and operations.