Agency Commission
Agency commission is a fee an advertising or media agency earns as a percentage of the media it buys for a client. If an agency charges 10% and places $200,000 of advertising, its commission is $20,000. It is one of the oldest ways agencies are paid, and it now sits alongside retainers, hourly fees, and performance-based pricing.
Last updated: November 2026
How does agency commission work?
The agency and the client agree a percentage. Each month the agency applies it to the media it placed and bills the result as its fee. For much of the twentieth century the standard rate was 15% of the gross media cost. Today the rate is negotiated, and large budgets usually carry a lower percentage than small ones.
Agency commission example
A client sets a monthly budget of $100,000. Under a 10% commission charged on top of media, the agency places $100,000 with the platforms and bills the client $110,000. Under a 15% commission taken from a gross budget, $85,000 goes to media and the agency keeps $15,000. The percentages sound close, but 15% of gross is the same as about 17.65% on top of net, so the basis matters as much as the rate.
Commission vs. markup vs. retainer
- Commission: a percentage of media spend. The fee rises and falls with the budget.
- Markup: an amount added to the cost of media or services the agency buys and resells.
- Retainer: a fixed monthly fee for an agreed scope of work, whatever the spend.
Many agencies combine them, for example a retainer for strategy and a commission on media. See agency billing for the full set of models.
Advantages and drawbacks
- Simple: the fee is easy to calculate and to check.
- Scales with workload: bigger budgets usually mean more work.
- Conflict of interest: the agency earns more when the client spends more, even if less spend would serve the client better.
- Unstable revenue: when a client cuts its budget, the agency's income falls with it.
Commission and cash flow
When the agency pays the platforms and then bills the client for media plus commission, it carries the media cost until the client pays. On a $200,000 budget at 10%, the agency is fronting $200,000 to earn $20,000. That gap is why client ad spend is a financing question for agencies, and not only a billing one.
How Opal helps agencies on commission
Opal is a charge card built for agencies. Credit limits go up to $10 million and are sized on managed ad spend and cash flow, so client media does not have to come out of the agency's operating cash.
Opal pays 1% cashback on eligible ad spend on credit accounts and 1.5% on pre-funded accounts, with no cap on what you earn. See how Opal works for agencies.
Frequently asked questions
The traditional figure was 15% of gross media spend. Rates today are negotiated and vary with the size of the budget and the services included. Many agencies charge a lower percentage on large budgets, or combine a smaller commission with a fixed fee.
They overlap. A management fee calculated as a percentage of ad spend is a commission under another name. A management fee can also be a flat monthly amount, in which case it works like a retainer.
The client pays it. The commission is either added to the media cost on the agency's invoice or taken from the gross budget the client provides, depending on what the contract says.
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