Find a calculator ↗Agency Retainer Profitability Calculator
Use this agency retainer profitability calculator to see what a monthly client fee earns after delivery costs. Compare profit, margin, break-even revenue, and the retainer fee needed for your target margin.
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What is retainer profitability?
This agency retainer profitability calculator helps you see what a monthly client fee earns after delivery costs.
A retainer is a recurring fee for an agreed level of service. Retainer profitability measures how much of that fee remains after the work and expenses needed to serve the client. A predictable invoice can still produce an unpredictable margin if meetings, revisions, and support increase.
Revenue is not profit
This tool shows a contribution after the costs you enter. It is not your company’s accounting net income: taxes, financing, and any unallocated expenses are outside the model.
How to use the retainer calculator
Enter one client’s monthly fee and actual delivery hours. Add the loaded hourly cost of the people doing the work, client-specific expenses, and a reasonable share of overhead. Set your own target margin, then calculate.
Use a consistent cost basis
For a mixed team, use a weighted hourly cost: total labor expense divided by total hours for that client. Do not enter the same contractor expense both in hourly labor and other direct costs.
Step-by-step planning checklist
- Choose one client and one monthly period.
- Include delivery, account management, meetings, and revisions in the hours, then use the team’s loaded cost rather than its selling rate.
- Add client-specific expenses and allocated overhead once.
- Compare actual results with a heavier-workload scenario before discussing renewal or scope changes.
Retainer profitability formula and example
A $5,000 monthly fee with 50 hours at $50 per hour, $300 of direct costs, and $200 of overhead has $3,000 of modeled cost. Profit is $2,000 and margin is 40%. A 30% target margin requires a fee of about $4,285.71 at the same cost.
Test the next month
Change delivery hours to model a heavier workload. If demand is rising, compare a higher fee, a narrower scope, or a different delivery process before renewing.
How to interpret your result
A negative profit means the entered costs exceed the fee. A positive margin does not automatically mean the engagement is worthwhile: capacity, payment timing, client concentration, and strategic value also matter.
Keep margin and markup separate
Margin divides profit by revenue. Markup divides profit by cost. A 30% markup does not produce a 30% margin. The target-fee calculation here uses margin.
Frequently asked questions
Should I use my billable rate as labor cost?
No. Use the cost of delivering the work, including employment costs or contractor charges. Your selling rate belongs in pricing, not the cost input.
For employees, include relevant employer-paid costs in a consistent loaded rate. For contractors, use the cost you actually incur and avoid repeating it under direct expenses.
Does this calculate net profit?
It calculates profit after the costs entered, including allocated overhead. It does not include business taxes, financing, or expenses you leave out.
Label the result as modeled client profit when sharing it. Company-wide net profit requires the complete business cost base and the appropriate accounting treatment.
What is a good agency retainer margin?
There is no single target for every agency. Set a target based on your service mix, overhead, risk, and capacity instead of treating an example value as a benchmark.
Compare similar engagements over time using the same cost allocation. A margin that looks strong can still be too low for a volatile or capacity-intensive account.
Can I include several employees?
Yes. Use their combined hours and a weighted average loaded hourly cost, or calculate each person’s labor cost separately and convert it to a blended rate.
For example, 20 hours at $40 and 30 hours at $60 cost $2,600 in total. Divide by 50 hours to enter a blended rate of $52.
How can I improve an unprofitable retainer?
Model a fee change, fewer delivery hours, or lower direct costs. Discuss scope and service expectations before assuming hours can be reduced.
Test one change at a time so its effect is visible. Lower modeled hours are only meaningful if the revised service can actually be delivered in that time.
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Agency hourly rate · Scope creep cost · Billable utilization · Project profitability
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