How to calculate true profit per client, not just billing rate
Most firms know their billing rate. Almost none know which clients actually make them money after real time and tool cost.
Billing rate tells you what you charge. It doesn't tell you what you keep.
True profit per client starts with revenue attributed to that client — recurring bookkeeping, catch-up fees, tax add-ons — not a blended firm average. Then subtract direct labor: time entries tagged to the client, loaded at cost (not bill rate). Add tooling: software seats, per-client AI usage, payment processing if you pass it through or absorb it.
What's left is contribution margin. Clients with high revenue and low margin aren't "good clients" — they're busy clients. They're the ones that feel fine on the AR aging report and terrible when a senior leaves and you realize how many hours the account actually consumed.
Three signals that billing rate is lying to you:
- Review-redo loops — the same work gets touched twice because preparation quality is inconsistent.
- Scope without engagement updates — extra entities, extra bank feeds, extra "quick questions" that never hit the letter.
- Flat fees on growing complexity — the client added payroll, inventory, or a second company; the fee didn't.
Fixing margin isn't always raising prices. Sometimes it's enforcing scope, sometimes it's letting agents absorb preparation so the same fee covers more work, sometimes it's firing the client that's been underwater for three years.
Synoro computes margin from time, payroll, and AI cost per client org so you see drift before year-end — not in a partner meeting when someone finally builds the spreadsheet.