Agency pass through costs: gross vs net revenue and how to book media spend

Agency pass-through costs are expenses an agency pays for a client and bills back, such as media, and booking them as revenue is the most common agency books error. Numetix records pass-through spend separately so revenue shows only the agency's earnings. This guide explains gross versus net, the tests, and the entries.

QUICK ANSWER: ARE PASS-THROUGH COSTS AGENCY REVENUE?

• Usually not. An agency that buys media as an agent for a client reports its fee as revenue and treats the media as a pass-through.

• The test is control: an entity that controls the service before it reaches the customer is a principal and reports gross, and otherwise it reports net.

• Judge each contract on its facts, record pass-throughs in their own accounts, and keep them out of revenue, margin, and utilization figures.

Numetix is the expert-led, AI-powered, human-in-the-loop bookkeeping layer for agencies and other professional services firms, so billings, pass-through costs, and margins are prepared by software and reviewed by a named person. The sections below cover the principal and agent test, a worked example with entries, and the controls that keep media spend clean.

What is the difference between gross and net revenue?

Gross revenue is the full amount billed to the client, including the media the agency bought. Net revenue is what the agency keeps after paying the media vendor. The choice matters because it changes reported revenue, margin percentages, and any ratio that uses revenue as the base. The Deloitte accounting spotlight states the rule: when an entity controls a specified good or service before it is transferred to the customer, it acts as a principal and recognizes revenue gross, and when it does not, it acts as an agent and recognizes revenue net (Deloitte accounting spotlight on principal versus agent).

How do you tell whether the agency is a principal or an agent?

ASC 606 asks whether the agency controls the specified service before the customer receives it. Three indicators help: whether the agency is primarily responsible for fulfilling the promise, whether it carries inventory risk before the customer takes the service, and whether it has discretion in setting the price. A CPA firm's ad-tech walkthrough shows the same logic applied to ad space sold at a markup, where an agent reports only the markup as revenue (Withum on gross versus net reporting under ASC 606).

What do the entries look like?

For example, an agency buys $54,000 of media for a client and bills $60,000. As an agent, it records a receivable of $60,000, a payable to the vendor of $54,000, and revenue of $6,000. As a principal, it would record revenue of $60,000 and media cost of $54,000. The cash is identical, but revenue differs by $54,000. The figures are illustrative.

Our guide to bookkeeping for marketing agencies shows the chart of accounts, and the hard cost and unbilled disbursements glossary entries cover costs paid for clients.

How do you keep media spend clean in the books?

• Use separate accounts for client media payable and prepaid media.

• Reconcile those accounts to platform and vendor statements every month.

• Bill pass-throughs at cost unless the contract allows a markup, and record any markup as revenue.

• Exclude pass-throughs from margin, utilization, and revenue per head.

• Review each new contract for principal or agent status before the first invoice.

Our guides to client profitability analysis and the monthly close for service firms show where these checks sit.

Frequently asked questions

Can an agency be a principal for some media and an agent for others?

Yes. The test applies to each specified service, so one contract can contain both. An agency that builds a creative package itself is a principal for that work, while the third-party media it buys for the client may be an agent arrangement. Document the conclusion for each distinct service.

What happens if media is booked as revenue by mistake?

Revenue and costs are both overstated, the margin percentage looks far lower than the real one, and ratios based on revenue mislead. Lenders, buyers, and auditors will usually catch it. Correct the entries, restate prior reports for any financing or sale, and add a contract review step.

Does this change how the agency collects cash?

No. The cash moves the same way whichever treatment applies. What changes is reporting. You still collect from the client and pay the vendor, so keep a clear media payable balance and reconcile it, because late client payments can leave the agency funding media with its own cash.

Numetix is the expert-led, AI-powered, human-in-the-loop bookkeeping layer that keeps agency books net of pass-through costs with a named reviewer. See our bookkeeping services built for marketing and media agencies.