Formula
Monthly profit = retainer minus delivery labor and overhead. Margin = profit divided by retainer. Max hours uses the target margin after overhead.
Free calculator
Agency Margin Calculator
Estimate client profit, margin, and maximum delivery hours before quoting a retainer or packaging a landing-page audit service.
Inputs
Use the client retainer, expected delivery hours, blended labor cost per hour, and tool/admin overhead assigned to the account.
Interpretation
Thin margin usually means the offer needs tighter scope, stronger proof, clearer pricing, or a higher-value audit deliverable before fulfillment starts.
Worked Examples
Landing Page Audit Retainer
An agency charges $2,500/month, expects 18 delivery hours at $65/hour, and assigns $250 in overhead. Cost is $1,420, profit is $1,080, and margin is 43.2%.
Decision: keep scope tight or raise price before adding recurring calls and revisions.
White-Label CRO Package
A white-label audit package sells for $1,500, uses 10 hours at $70/hour, and carries $150 in overhead. Profit is $650 and margin is 43.3% before client management time.
Decision: define revision limits and report format before accepting volume.
Margin And Scope Guide
| Margin Signal | Risk | Practical Fix |
|---|---|---|
| Below 30% | Small overruns can erase profit. | Reduce scope, increase price, or turn the work into a fixed deliverable. |
| 40% to 50% | Workable if delivery time and revisions are controlled. | Track actual hours and protect senior time. |
| Above 60% | Strong on paper, but only if quality and client outcomes stay high. | Invest in proof, templates, and repeatable fulfillment. |
Common Agency Margin Mistakes
Undercounting Delivery Cost
- Leaving project management, QA, client calls, and revisions outside the estimate.
- Using freelancer rates without accounting for internal review time.
- Forgetting tools, admin, and unpaid sales time when pricing retainers.
Letting Scope Drift
- Offering strategy, copy, design, implementation, and reporting for one fixed fee.
- Accepting low-trust clients without clear success criteria.
- Missing upgrade paths when the audit uncovers larger implementation work.
FAQ
What margin should an agency retainer target?
Targets vary by model, but many small agencies need at least 40% to 50% gross margin on retainers to leave room for admin, sales, management, and profit.
How do I calculate max delivery hours?
Subtract overhead and target profit from the retainer, then divide the remaining delivery budget by blended hourly cost.
What causes agency margins to disappear?
Margins usually disappear through vague scope, unpriced revisions, senior labor on low-value work, undercounted project management, and weak client qualification.