This free retainer fee calculator from Nemin.io helps agencies and freelancers price monthly retainers that cover delivery costs and hit a target profit margin. Enter the hours per month, your hourly cost rate, monthly software or tool costs and your desired margin to see a suggested retainer, base delivery cost and target monthly profit.
Retainers give clients consistent support and give agencies predictable revenue, but only if they’re priced properly. This calculator makes the maths simple. Free, with no sign-up.
Retainer Fee Calculator: Price Your Monthly Retainer
Fill in the fields and click Calculate.
How the Nemin.io Agency Retainer Calculator Works
- Base monthly delivery cost = (hours × hourly rate) + software and tool costs
- Suggested retainer = base cost ÷ (1 − desired margin)
- Target monthly profit = retainer − base cost
The margin is calculated as a share of the final retainer, not as a markup on cost, so the profit really is the percentage of the price you chose.
Worked Example
An agency plans 40 hours a month at $75 an hour, with $300 in tools, and wants a 30% margin. The base cost is $3,300, the suggested retainer is $4,714.29 a month and the profit is $1,414.29. Simply adding 30% to $3,300 would give $4,290, which is only about a 23% margin.
How to Use the Nemin.io Agency Retainer Calculator
- Enter Hours per month.
- Enter Hourly rate ($).
- Enter Monthly software/tools cost ($).
- Enter Desired profit margin (%).
- Click Calculate retainer to see your results instantly.
- Change one input at a time to compare scenarios, then click Reset to start again.
The Agency Retainer Calculator runs entirely in your browser, so you can test as many scenarios as you like.
What Should a Retainer Include?
- Scope: the services and deliverables covered each month.
- Hours: the estimated or capped hours included.
- Response times: how quickly requests are handled.
- Reporting: what results are shared and how often.
- Overage terms: how extra work is billed.
- Notice period: how either side can end the agreement.
For more on pricing models and typical inclusions, read about how agency retainer fees are priced.
Choosing the Right Hourly Rate Input
The hourly rate here should be your internal delivery cost per hour, such as staff or contractor cost plus overhead, not your client-facing rate. The margin is then added on top. If you’re a freelancer, you can use the Nemin.io Freelancer Hourly Rate Calculator to find a sustainable base rate first.
How Target Margin Changes the Retainer
For 40 hours a month at a $75 hourly cost plus $300 in tools (a $3,300 base cost), here’s the retainer needed for different margins:
| Target margin | Monthly retainer | Monthly profit |
|---|---|---|
| 20% | $4,125.00 | $825.00 |
| 30% | $4,714.29 | $1,414.29 |
| 40% | $5,500.00 | $2,200.00 |
| 50% | $6,600.00 | $3,300.00 |
Each extra ten points of margin raises the retainer faster than the one before, because the margin is a share of the final price.
Who the Agency Retainer Calculator Is For
- Marketing, design and development agencies
- Freelancers offering monthly packages
- Consultants moving from hourly billing to retainers
- Agency owners reviewing client profitability
- Anyone pricing ongoing monthly services
Margin vs Markup in Retainer Pricing
| Target margin | Equivalent markup on cost |
|---|---|
| 20% | 25% |
| 30% | 42.86% |
| 40% | 66.67% |
Pricing with a markup when you mean a margin is one of the most common reasons agencies earn less than expected.
Keeping Retainers Profitable
Track actual hours against retainer hours every month. If a client consistently uses more time than planned, review the scope or price. Build in time for account management, meetings and reporting, which are easy to forget but very real costs. Review retainer pricing at least once a year as tools, salaries and scope change.
Key Terms Explained
- Retainer: A recurring monthly fee for an agreed scope of work.
- Delivery cost: The internal cost of doing the work, including time and tools.
- Target margin: The share of the retainer you want to keep as profit.
- Overage: Work beyond the agreed scope, usually billed separately.
- Utilization: The share of team time spent on billable client work.
Tips for Accurate Agency Retainer Calculator Results
- Use internal cost per hour, not your client rate.
- Include time for meetings, reporting and account management.
- Track actual hours monthly against the retainer.
- Review pricing at least once a year.
Related Free Calculators
Retainer pricing builds on a sound hourly rate and healthy margins. Try the Nemin.io Freelancer Hourly Rate Calculator, the Nemin.io Profit Margin Calculator and the Nemin.io Social Media Pricing Calculator. All of them are free and work the same way as the Agency Retainer Calculator, so you can move from one question to the next in seconds.
More Free Nemin.io Calculators
Try the other free calculators:
- Freelancer Hourly Rate Calculator
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Read our guides:
- Nemin.io business calculators: complete guide to all 11 tools
- Nemin.io pricing calculators explained
- Nemin.io marketing budget calculators explained
- How to use Nemin.io: step-by-step guide
- Nemin.io vs spreadsheets
Browse all free Nemin.io tools or visit the Nemin.io homepage.
Retainer Fee Calculator FAQs
Is the Nemin.io agency retainer calculator free?
Yes. It’s free and works in your browser.
How do I calculate a monthly retainer?
Add hours × hourly cost and software costs, then divide by (1 − target margin).
What hourly rate should I enter?
Your internal delivery cost per hour, not the price you show clients.
What is a good retainer margin?
It depends on your business model and market. Many agencies set a target and review it against actual hours each month.
How do I handle extra work?
Agree overage terms in advance, such as an hourly rate for work beyond the retainer scope.
Can freelancers use this calculator?
Yes. It works for any monthly service package.
What is a monthly retainer?
A monthly retainer is an agreement where a client pays a fixed fee each month for an agreed scope of work or a set number of hours, such as ongoing marketing, design, SEO or support. It gives the client reliable access to the provider and gives the provider predictable income. A clear retainer plan states the services, hours, response times and what counts as extra work.
How much do agencies charge for a monthly marketing retainer?
There’s no standard price. Marketing retainers vary widely with the services included, the hours involved, the agency’s experience and its location. Rather than copying an average, price your retainer from your own delivery hours, costs and target margin, which is what this calculator does.
What's the difference between a retainer and a project fee?
A project fee covers a defined piece of work with a start and end, such as a website build. A retainer is ongoing and billed monthly for continuing work. Many agencies use both: a project to set things up, then a retainer for ongoing improvements.
Should unused retainer hours roll over?
It’s a business decision, and either way works if it’s written into the agreement. Some providers let a limited number of hours roll over to the next month, while others treat the retainer as reserved capacity that expires each month. Stating the rule up front avoids disputes.
