Industry benchmarks for B2B Consulting Firms
Consulting firms recover CAC in about 2 months, which is what makes the model workable despite short client lifetimes. CAC per client runs $5,000 to $15,000 including partner selling time, proposal development, and the pursuit cost of deals that never close. Retainers land at $8,000 to $20,000 per month with delivery margin of 38 to 50 percent after fully loaded consultant cost, and monthly churn of 5 to 8 percent implies engagements averaging 12 to 20 months. At $9,500 CAC against $4,840 in monthly gross profit, payback is 2.0 months.
The LTV lever is converting project work into ongoing retainers, since a completed project ends while a retainer compounds. Firms that build a defined post-project offering, embed a named senior lead, and report against client business metrics rather than deliverables see materially longer tenures. Utilization is the constraint that limits how hard you can push acquisition, because winning work you cannot staff destroys margin and reputation simultaneously. Referral-sourced clients typically carry a fraction of the CAC and longer tenure, so track CAC by source rather than blended.
Frequently asked questions
CAC Payback Estimator for B2B Consulting Firms, answered.
How do I value partner time in CAC?
At the billable rate you would otherwise charge for those hours. Partner selling time is the real cost of consulting acquisition and ignoring it makes CAC look artificially small.
Should project-based clients be modeled as churn?
Model them as a finite lifetime rather than a churn rate. If the average engagement is 9 months, LTV is 9 months of gross profit, regardless of what a monthly churn calculation implies.
What LTV:CAC should a consulting firm target?
4x or better. Delivery capacity is constrained and revenue is less predictable than contracted software, so the extra buffer covers utilization gaps between engagements.