Why Agency Gross Income (AGI), Not Revenue, Is How You Actually Measure Agency Profitability
Run the free Agency Financial Health Check → your real numbers in 2 minutes, no emailAsk most agency owners how the business is doing and they'll quote revenue. Ask an agency-finance specialist and they'll ask for Agency Gross Income first — because revenue includes money that was never really the agency's to keep.
Your own AGI takes six numbers and a minute. Knowing the formula will not tell you what your agency is actually running at. The free Agency Financial Health Check takes six figures from this month's books and returns your real AGI, utilisation, delivery margin and break-even AGI, in your browser, with no email required.
The formula
AGI = Gross Billings − Pass-Through Costs
Pass-through costs are the media spend, freelancer fees, and third-party tools you bill the client for but don't actually earn a margin on. A $50,000/month retainer with $30,000 of ad spend passed through isn't a $50,000 engagement — it's a $20,000 one. Every profitability ratio that matters (utilisation, realization, delivery margin) should be calculated against that $20,000, not the $50,000.
| Measured against | Gross billings | AGI |
|---|---|---|
| Monthly retainer | $50,000 | $50,000 |
| Less pass-through ad spend | — | −$30,000 |
| Figure your ratios run on | $50,000 | $20,000 |
| A $9,000 delivery cost therefore reads as | 82% margin | 55% margin |
Same engagement, same costs, same month. The left column is the one that makes hiring look affordable.
Why this matters more in 2026
Agencies running media buying, paid social, or programmatic alongside creative or strategy work often have pass-through costs that dwarf their actual fee. Reporting against gross revenue in that setup doesn't just overstate the business — it makes hiring, pricing, and capacity decisions look safe when they aren't.
What to do with AGI once you have it
AGI is the denominator for the ratios that actually predict agency health: delivery margin (AGI minus direct delivery cost, divided by AGI — healthy agencies run 50-65%), and break-even AGI (fixed overhead plus target owner pay, divided by delivery margin %). Revenue can't answer either question honestly.
Run the free Agency Financial Health Check — it calculates your real AGI, utilisation, and margin numbers from six inputs, no email required. If you want to track this every month rather than as a one-off snapshot, the Marketing Agency Financial Model is a working .xlsx with live formulas built around exactly this formula, with a written guide that walks through running it. One payment of $299, no subscription.
Common questions
What is Agency Gross Income (AGI)?
AGI is gross billings minus pass-through costs: the media spend, freelancer fees and third-party tools you bill a client for but earn no margin on. It is the money the agency actually keeps to run itself, and it is the figure every profitability ratio should be calculated against.
How is AGI different from revenue?
Revenue counts money that passes straight through to someone else. On a $50,000 monthly retainer carrying $30,000 of ad spend, revenue says $50,000 and AGI says $20,000. A $9,000 delivery cost reads as an 82% margin against revenue and a 55% margin against AGI. Only one of those is true.
Why does measuring against revenue cause problems?
Because it makes hiring, pricing and capacity decisions look safe when they are not. Agencies running media buying, paid social or programmatic alongside creative work often have pass-through costs that dwarf the fee, so reporting against gross revenue overstates both the size and the health of the business.
What is a healthy delivery margin?
Healthy agencies run 50-65% delivery margin, which is AGI minus direct delivery cost, divided by AGI. Break-even AGI is fixed overhead plus target owner pay, divided by the delivery margin percentage. Neither question can be answered honestly from revenue.