An agency director once told me: 'I check revenue every morning, things feel good.' Three months later, he was out of cash. Revenue up, margins wrecked, payment delays out of control. Top-line revenue is a vanity metric. It feels reassuring. It does not steer the business.
Financial health in an agency is a system. Multiple indicators feeding each other. Miss one, and the others tend to follow within 60 days. Here are the 7 metrics I have seen separate agencies that last from those that eventually sell their client portfolio at a discount.
1. Gross Margin Per Project
This is the foundation. Gross margin equals project revenue minus direct costs: freelancers, licenses, media buying, subcontracting. Many agencies know their project revenue but have no idea of their real margin. A 15,000-euro project with 11,000 euros in subcontracting is 27% margin. Not great.
The threshold to watch: below 45% gross margin on projects, an agency under 20 FTEs struggles to cover fixed overhead. I worked with a Paris social media agency posting 40% gross margin but never understanding why cash felt tight. The issue: internal project manager time was not counted as a direct cost. Recalculated properly, margin dropped to 31%. Painful to hear. Necessary.
2. Burn Rate and Runway
Burn rate is how much cash you spend each month to keep the lights on. Fully loaded payroll, rent, SaaS subscriptions, everything. Runway is how many months you survive at current burn if revenue drops to zero. Two months of runway is an emergency. Six months is the minimum comfort zone.
We thought we had 4 months of runway. Once we factored in project advances we had already used but not yet invoiced, it was 6 weeks. That completely changes your commercial priorities. — Maxime, co-founder of a UX/UI agency, Lyon
3. DSO: Your Clients Are Borrowing From You for Free
Days Sales Outstanding measures the average time between issuing an invoice and actually receiving payment. A DSO of 75 days on 30-day payment terms means your clients are financing themselves with your cash. For free. Agencies working with large corporate clients often see DSO spike to 90 or even 120 days despite contractual terms. Tools like Clynt can automate payment reminders and typically recover 15 to 20 days of DSO within weeks.
4. Payroll-to-Revenue Ratio
Industry rule of thumb: fully loaded payroll should not exceed 55 to 60% of revenue for a professional services agency. Above that, overheads leave little room for EBITDA. Below 45%, either your team is exceptionally efficient or you are underpaying people and will pay the price in retention within 12 months.
5. Billable Utilization Rate
This is the share of total team time that lands on billable projects. Not time in the office. Not Slack hours. Actual sellable hours. Below 65% utilization on a 10-person agency means 3.5 FTEs running without generating direct revenue. I saw a Bordeaux web agency jump from 61% to 74% billable utilization in 4 months purely by improving time tracking and project staffing in Clynt. No new clients, no new hires. EBITDA impact: plus 47% over the following quarter.
6. Quote Conversion Rate
Most agencies calculate client acquisition cost only on marketing spend. They forget commercial time: how many hours of project managers, directors, and salespeople go into producing and defending a proposal? On 20,000-euro projects at 25% conversion, if each proposal takes 8 hours to produce, the real CAC is far higher than it looks.
- Target conversion rate: 35-50% on qualified inbound leads
- Acceptable rate: 20-30% on cold RFPs
- Below 15% across all channels: the problem is either targeting or pricing
7. Net Revenue Retention
NRR measures revenue generated from an existing client cohort year over year, including upsells and churn. An NRR above 110% means existing clients are worth 10% more this year than last, without counting new ones. Agencies with NRR above 105% have fundamentally different resilience and valuation profiles. Fewer than 20% of agencies I encounter actually calculate this formally. Frankly, that is a missed opportunity.
FAQ
What is a healthy gross margin for a digital agency?
For a digital services agency under 30 FTEs, healthy gross margin sits between 45% and 65% depending on service type. Pure consulting agencies can exceed 65%, while those with heavy subcontracting or media buying run naturally lower. Below 40% signals the need to revisit either pricing or cost structure.
How can an agency reduce DSO without damaging client relationships?
Invoice immediately on deliverable approval, not at month end. Automate polite reminders at 3 and 10 days past due. Negotiate upfront deposits on projects above 10,000 euros. These three practices alone typically recover 15 to 25 days of DSO within a few weeks.
How often should an agency review its financial indicators?
DSO, billable utilization, and burn rate deserve weekly attention, ideally every Monday morning. Gross margin per project and payroll ratio can be reviewed monthly at close. NRR and conversion rates are quarterly metrics. A simple dashboard with these differentiated cadences keeps focus where it matters.
Does a small 5-person agency need all these metrics?
Not all of them, but three are non-negotiable at any size: runway, billable utilization rate, and gross margin per project. These three together tell you whether you are solvent, whether your team is efficient, and whether you are actually making money on your work. The others layer in naturally as the team grows.