Why agency ad spend matters

Agency ad spend behaves differently from corporate expense management at every point that matters, and the difference compounds with client count.

Corporate spend management assumes employees spending company money on company categories. Agency ad spend is one company moving many clients' money into a small number of platforms, where every dollar has to stay attributable to the client who owns it. The tooling built for the first case produces a shared statement, a limit tied to the agency's own balance sheet, and rewards that treat advertising like a travel expense.

At three clients that is annoying. At 30 it is a full-time job.

How agencies structure ad spend

  • One card per client per platform as the base pattern.
  • Credit sized to managed spend rather than to agency revenue or deposits.
  • Automated reconciliation mapping transactions to client and campaign.
  • Role-based permissions so buyers can spend inside a limit without touching other clients.
  • Cashback as a revenue line on spend the agency was placing anyway.

Business examples

A 25-client performance agency with 60 active virtual cards. A media buying firm running $1.2M a month across Meta, Google, and TikTok. A boutique agency with four clients that wants the structure in place before the fifth arrives.

Frequently asked questions

Why do general business cards struggle with agency ad spend?

Three reasons. Limits are underwritten against the agency's own financials rather than the budgets it manages. Rewards treat advertising as an ordinary category or cap it well below agency volume. Reporting produces a company statement rather than a per-client one.

How much cashback can an agency earn on client ad spend?

It depends on the rate and the volume. At $200,000 a month in managed spend, 1% returns $2,000 a month and 2% returns $4,000. Opal offers 1% cashback on eligible ad spend, with higher rates subject to eligibility, earned while spending against Opal's credit line rather than the agency's own cash.

Does agency ad spend require a personal guarantee?

On most traditional business cards, yes, including every American Express business card. Opal does not require a personal guarantee or a hard credit check.

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