There's one number that tells you more about the financial health of your agency than almost anything else on your P&L. Most owners either don't know it or don't track it consistently.
It's your payroll-to-revenue ratio. Total people costs — salaries, contractor payments, employer taxes, benefits — divided by gross revenue. That's it.
Simple to calculate. Surprisingly hard to face.
What the number should look like
For a healthy marketing or advertising agency, total people costs should run somewhere between 45% and 55% of gross revenue. That's the range where you have enough margin to cover your overhead, reinvest in growth, and actually pay yourself something meaningful.
Above 60% and you're working hard to break even. Above 70% and you're essentially running a nonprofit — the revenue is there, the profit isn't.
The problem is most agency owners don't know where they are until things already feel tight. By then the ratio has been drifting for months.
Why it drifts without you noticing
Agencies add people incrementally. One contractor for a new client. A part-time hire to cover capacity. A retainer with a freelancer that quietly becomes full-time hours.
Each individual decision looks fine in isolation. The cumulative effect doesn't show up until you look at the whole picture — and most owners aren't looking at the whole picture on a regular basis.
The other reason it drifts: revenue fluctuates but people costs don't. A slow month cuts your revenue. Your payroll stays exactly the same. The ratio spikes and nobody catches it because the books aren't current enough to show it in real time.
How to calculate yours right now
Pull your last three completed months. For each month:
Take total revenue. Then add up everything you paid in people costs — W-2 employees including employer payroll taxes, 1099 contractors, any platforms you use to pay freelancers.
Divide total people costs by total revenue. Multiply by 100. That's your ratio.
If you can't pull those numbers in under ten minutes, that's a separate problem worth addressing.
What to do if the number is too high
First — don't panic, and don't immediately start cutting people. The ratio is a signal, not a verdict.
The first thing to do is make sure the number is accurate. Misclassified expenses, missing contractor invoices, and accounting errors can all distort it in either direction. Get your books clean before you make decisions based on them.
Once you have an accurate number, the levers are straightforward: increase revenue per head, reduce contractor spend on lower-margin work, or reprice clients whose cost-to-service has crept up since you last looked at it.
None of those decisions are easy. But they're a lot easier to make when you can see the number clearly — and a lot harder to avoid when the number is staring at you every month.
The point
Your payroll-to-revenue ratio is one of those metrics that sounds boring until you realize it's been quietly predicting your cash flow problems three months in advance.
Track it monthly. Benchmark against the ranges above. And if you don't have books current enough to calculate it right now — that's the first thing to fix.