A cost-benefit analysis (CBA) for executive assistant support in consulting firms requires a different framework than most operational investments. The benefits are partly financial and measurable, partly operational and measurable, and partly strategic and harder to quantify. A rigorous CBA accounts for all three dimensions.
This guide walks through the complete cost-benefit framework that consulting CEOs and firm leaders should apply when evaluating the investment in executive assistant support.
The Cost Side
Direct Service Costs
The most visible cost is the fee paid for EA services. As detailed across our pricing resources, this ranges from under $1,000 per month for basic arrangements to over $10,000 for premium white-glove services.
For a representative mid-tier consulting CEO analysis, assume:
- Premium dedicated virtual EA: $5,500 per month ($66,000 annually)
- Or: Senior in-house EA with all employment costs: $130,000 annually
Indirect Costs
Onboarding investment: Even with a strong EA, onboarding requires CEO time. Estimate two to three hours per week for the first month declining to 30 minutes per day thereafter. At $350/hour CEO value, the first month onboarding investment represents approximately $2,800 to $4,200.
Management time (ongoing): Well-structured EA relationships require 15 to 30 minutes of daily synchronization. At $350/hour, this represents $1,300 to $2,600 monthly in CEO time invested in managing the relationship. This is a necessary investment but a real cost.
Technology and tools: Some EA arrangements require additional technology (task management tools, communication platforms). Budget $50 to $200 per month.
Training: Initial skills development for a new EA may require investment in training resources or courses. Budget $500 to $2,000 one-time.
Total Cost Summary (Annual, Representative Scenario)
- EA service cost: $66,000
- Onboarding time: $3,500 (one-time, year 1)
- Ongoing management time: $19,500
- Technology: $1,800
- Training: $1,000
- Total Year 1 Cost: $91,800
The Benefit Side
Direct Financial Benefits
Recaptured billable time: The most direct financial benefit. If the CEO bills at $350/hour and the EA enables them to redirect 15 hours per week from administrative to billable work:
- Weekly gain: $5,250
- Annual gain: $273,000
Even at the most conservative assumption, 10 hours per week of recaptured billable time at $300/hour:
- Weekly gain: $3,000
- Annual gain: $156,000
More consistent business development: CEOs with EA support pursue BD more consistently. If consistent BD activity adds one additional engagement per year at an average engagement value of $150,000:
- Annual BD gain: $150,000 (conservative; many firms see more)
Faster proposal turnaround: EA coordination of proposal logistics can shorten submission timelines. If this improves win rates by even one additional engagement annually: add $150,000 (same assumption).
Operational Benefits (Measurable)
Client communication response time: EAs enable same-day responses to client inquiries. Research on professional services retention indicates that response time is a significant factor in client satisfaction and retention. A 5 percent improvement in client retention at a firm with $2M in recurring annual client fees represents $100,000 in protected revenue.
Meeting quality improvement: When CEOs arrive fully briefed and prepared, meeting quality improves. Assume this translates to faster decision-making, more impactful conversations, and stronger client impressions, but quantifying this precisely requires firm-specific data.
Error reduction: Administrative errors, missed commitments, forgotten follow-ups, create client friction that costs real business. An EA systematically reduces these errors. Even preventing two client relationship setbacks per year, each worth $50,000 in at-risk revenue, represents $100,000 in protected business value.
Strategic Benefits (Harder to Quantify)
CEO performance quality: Reduced cognitive load from administrative work improves the CEO’s decision quality, leadership presence, and relationship skills across all interactions. This is genuinely difficult to quantify but is reflected in firm performance over time.
Talent perception and firm brand: A well-supported, composed, and operationally excellent CEO projects a stronger firm brand to both clients and prospective consulting talent. This affects the firm’s ability to attract premium clients and top talent.
CEO sustainability and longevity: Burnout in consulting leadership is a real risk. Adequate support significantly reduces the operational pressure that contributes to burnout, extending the CEO’s effective career and protecting the firm from succession disruption.
Full Cost-Benefit Summary
Conservative Scenario
| Category | Annual Value |
|---|---|
| Recaptured billable time (10 hrs/week @ $300/hr) | $156,000 |
| BD consistency gain (1 additional engagement) | $150,000 |
| Client retention protection | $50,000 |
| Error reduction | $50,000 |
| Total Benefit | $406,000 |
| Total Cost | ($91,800) |
| Net Annual Benefit | $314,200 |
| ROI | 342% |
Moderate Scenario
| Category | Annual Value |
|---|---|
| Recaptured billable time (15 hrs/week @ $350/hr) | $273,000 |
| BD consistency gain | $150,000 |
| Client retention protection | $100,000 |
| Error reduction | $75,000 |
| Total Benefit | $598,000 |
| Total Cost | ($91,800) |
| Net Annual Benefit | $506,200 |
| ROI | 551% |
Both scenarios produce strongly positive ROI. The CBA consistently favors investment in EA support for consulting CEOs.
Sensitivity Analysis: When the Case Gets Weaker
The CBA assumptions that most affect the outcome:
What if the EA doesn’t actually recapture much billable time? If the CEO’s schedule is already fully booked with client time and the EA simply makes administration more efficient rather than enabling more billing, the direct financial benefit is lower. The operational and strategic benefits still apply, but the ROI is more modest.
What if the EA requires significant management? If the CEO spends significantly more time than the assumed 30 minutes per day managing the EA (due to quality issues, calibration needs, or poor fit), the management time cost increases and reduces net ROI.
What if the EA placement doesn’t work out? A failed EA hire or engagement adds disruption costs: time lost, service fees for failed relationships, and recruiting costs to start over. This risk can be partially mitigated by thorough upfront selection.
These sensitivities don’t change the overall direction of the analysis but do affect the magnitude. The CBA is robust to moderate adverse assumptions.
Applying the Framework to Your Firm
To run this analysis for your specific situation:
- Estimate your effective hourly value (billing rate or equivalent revenue value per hour)
- Audit your current administrative task time (track for one week)
- Calculate the annual value of recaptured time at your hourly rate
- Estimate the BD and client retention benefits based on your firm’s economics
- Compare to the EA service cost at the tier that matches your needs
- Assess the result against your risk tolerance and available budget
For guidance on EA pricing, see consulting EA pricing. For a focused ROI analysis, see consulting EA ROI.
According to Harvard Business Review, CEOs who invest in structured support consistently demonstrate stronger performance on the highest-value leadership activities. The cost-benefit analysis in this guide quantifies why.
Conclusion
The cost-benefit analysis for executive assistant support in consulting and professional services consistently produces strongly positive results under reasonable assumptions. The combination of recaptured billable time, improved business development consistency, client retention protection, and strategic benefits substantially outweighs the cost of quality EA support.
The most important inputs to this analysis are your actual billable rate or equivalent time value and an honest estimate of your current administrative time consumption. With these two numbers, the rest of the CBA is straightforward, and the case for investment becomes clear.
Related Reading
For further context, explore Executive Assistant Cost-Benefit Analysis for Automotive and Executive Assistant Cost-Benefit Analysis for Construction & Architecture.