Effective rate is what the headline rate becomes once reality is done with it. If a senior designer published rate is $250/hour but the team logged 80 hours on a $14,000 fixed-fee project, the effective rate is $175 — and the proposal that was costed at $250 is now 30% less profitable than it looked.
For agencies, effective rate is the most honest number in the studio. It absorbs scope creep, discounts, and any time written off and gives you a single figure to compare projects, clients, and teams. Track it per engagement and the portfolio true health appears in weeks rather than quarters.
A rising headline rate with a flat effective rate means the agency is winning discounts and giving them all back at delivery. Fix the delivery side first — scope, change orders, time tracking — before pushing the rate card up again.