Calwarden

Agency Retainer Calculator

Calculate a recommended monthly agency retainer from service hours, labor cost, direct costs, and target margin.

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Inputs

hr/mo
$/hr
$
%

Your values stay on this device.

Results

Recommended Retainer
Monthly Cost Base$5,800.00
Target Gross Profit$3,866.67
Effective Bill Rate$120.83

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Assumptions

  • Rates are user-entered planning assumptions.
  • The estimate does not replace accounting, tax, payroll, legal, or marketplace-specific guidance.
  • Inputs are processed locally in the browser.

Sensitivity preview

Service Hours -10%: Recommended Retainer $8,933.33

Service Hours Current: Recommended Retainer $9,666.67

Service Hours +10%: Recommended Retainer $10,400.00

Formula: Cost base = service hours * blended cost rate + direct costs + account management cost. Recommended retainer = cost base / (1 - target margin).

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About this Agency Retainer Calculator

Retainer pricing needs to cover delivery labor, direct costs, account management, and target margin.

Who this calculator is for

  • Freelancers, founders, consultants, and small business operators.
  • Bookkeepers and finance teams doing quick planning checks.
  • Anyone comparing pricing, tax, payment, or marketplace assumptions.

When to use it

  • Model a planning scenario before changing pricing or workflow.
  • Compare best-case and conservative assumptions.
  • Turn business inputs into a transparent estimate.

How to use this calculator

  1. Enter your current or planned business assumptions.
  2. Adjust rates and fees to match your situation or provider.
  3. Review the primary result and supporting breakdown.

Key assumptions

  • Rates are user-entered planning assumptions.
  • The estimate does not replace accounting, tax, payroll, legal, or marketplace-specific guidance.
  • Inputs are processed locally in the browser.

Accuracy and testing

Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.

View accuracy page

How this calculator works

Cost base = service hours x blended cost rate + direct costs + account management cost. Recommended retainer = cost base / (1 - target margin).
Cost base = service hours * blended cost rate + direct costs + account management cost. Recommended retainer = cost base / (1 - target margin).

Inputs explained

Revenue and volume

The sale, customer, invoice, or workload amount being modeled.

Rates and fees

Editable percentages, flat fees, or tax rates used in the estimate.

Costs

Direct expenses, platform fees, labor, support, or other assumptions that reduce profit or take-home pay.

Understanding your results

Recommended retainer is the monthly price needed to hit the target margin under the entered scope.

Example scenarios

Planning example

80 service hours at $55 cost, $600 direct costs, $800 account management, and a 40% margin require about $9,667/month.

Key Features

  • Instant Calculation
  • Private & Secure
  • Mobile Optimized

Tips & Best Practices

  • Run a conservative scenario before making pricing decisions.
  • Use current payment processor or marketplace fee schedules when applicable.
  • Revisit assumptions when costs, volume, or tax rates change.

Frequently Asked Questions

Should I price from cost or value?
This calculator is cost-plus. Value-based pricing may justify a higher retainer when outcomes are strong.
Is my business data stored?
No. The calculator runs locally in your browser and does not upload your inputs.