Focus on Costs

The lowest visible price is rarely automatically the most cost-effective staffing decision. A short-term surge in orders requires rapid capacity. A permanent position that’s difficult to fill ties up recruiting resources. An overburdened HR team can barely handle additional searches.

Which is more cost-effective for companies: temporary staffing, internal recruiting, or a staffing agency? Which model results in the lowest total costs under the given circumstances?

The most cost-effective approach depends on the specific needs

None of the three options is inherently the most cost-effective. The decisive factors are the duration of the assignment, fluctuations in demand, the number of people needed, the level of specialization, internal recruiting capacity, and the risk of a poor hire.

The comparison is therefore a matter of decision-making logic. Companies must assess which cost structure best fits their specific staffing needs. Temporary staffing can be a sensible option for temporary or fluctuating needs. An recruitment agency supports permanent hires, while internal recruiting leverages existing structures.

Three models, three cost structures

The models differ in terms of the employment relationship, the distribution of tasks, and the billing method. If these differences are not clearly distinguished, one ends up comparing individual prices rather than total costs.

• Internal recruiting: The company bears the entire cost of resources for searching, selecting, and hiring.

• Temporary staffing: Employment is temporary and arranged through a staffing agency. The client company pays an agreed-upon hourly rate.

• Executive search: The company hires the selected candidate directly and typically pays a one-time placement fee.

Internal Recruiting: Control Through Internal Resource Allocation

In internal recruiting, the company manages the entire process. This includes the job requirements, job postings, recruiting tools, active sourcing, applicant screening, interviews, and onboarding.

The time spent by HR and the business unit must also be factored in. Added to this are the costs associated with a vacant position—such as delayed projects, capacity shortages, or existing teams taking on additional tasks. Internal recruiting is particularly suitable for regularly recurring roles, provided there is sufficient internal capacity.

Temporary staffing: variable capacity for temporary needs

In temporary staffing, employees are hired by the staffing agency and work at the client company for a defined period. The billing rate depends, among other things, on qualifications, assignment duration, work schedule, collective bargaining agreements, and industry.

Recruiting, payroll, social security, and employer obligations under labor law are the responsibility of the staffing agency. This allows the company to partially convert fixed personnel expenses into variable, demand-based costs. This provides planning certainty during order peaks, seasonal demands, and periods of uncertain workload.

Executive search: a one-time search for direct permanent employment

In executive search, the service provider identifies and screens suitable candidates. The company enters into the employment contract directly with the selected specialist or executive.

Compensation is typically paid as a one-time commission. As a rough market guideline, this ranges from 15 to 25 percent of the gross annual salary. The specific fee depends on the assignment and varies according to the position, level of difficulty, and scope of services. Flat-rate amounts in euros do not reliably reflect these differences.

Compare total costs rather than individual prices

A robust cost analysis adds up all expenses over the entire duration of the staffing need. An inexpensive job posting package can become costly due to long vacancy periods. A seemingly higher hourly rate can be cost-effective if capacity is needed only temporarily.

The following cost categories should be included in the comparison:

• Internal working hours of HR and the business unit

• Job postings, recruiting tools, and sourcing

• Screening, interviews, and selection

• Preparation and execution of onboarding

• Salary, social security, and other employer costs

• Hourly rate or placement fee

• HR administration

• Absenteeism, vacancy, and idle time risks

Tracking Direct Costs

For a permanent position, the company bears the salary, social security contributions, and other employer obligations. This applies regardless of whether the person was recruited internally or found through a staffing agency.

In the case of temporary staffing, the client company pays the agreed-upon billing rate. For a fair comparison, this rate must be applied to the planned duration of the assignment and working hours. A placement fee, on the other hand, should be considered in conjunction with the subsequent employer costs associated with permanent employment.

Evaluating Hidden Expenses and Vacancy Costs

Vacancy costs arise as long as the required workforce is lacking. Possible consequences include lost revenue, project delays, productivity losses, increased strain on the team, opportunity costs, and additional recruiting efforts.

Companies should estimate these costs on a case-by-case basis. The basis for this includes revenue per employee and workday, lost team performance, and the financial impact of project-related delays. A shorter time to fill a position can reduce vacancy costs but does not automatically make an external solution more cost-effective.

Incorporate Mis-hiring and Planning Risks

A mis-hire results in renewed search efforts, additional onboarding, and potential performance shortfalls. Instead of relying on flat rates, companies should assess the probability and operational consequences for each position.

Planning risks also influence the total costs. In the face of an uncertain order situation, a permanent hire can lead to idle capacity later on. Conversely, for long-term needs, a temporary model used on a permanent basis can increase costs. The expected development of demand should therefore be included in every scenario.

How Companies Create a Robust Cost Analysis

A comparable analysis requires identical demand assumptions. The following three steps create a robust framework.

1. Define Demand: Create a Framework for Comparison

Identify requirements and classify demand.

Document the number of personnel needed, the location, qualifications, start date, and planned duration of assignment or employment. Include the work schedule model, shift requirements, seasonality, and strategic relevance.

This information indicates whether the demand is short-term, fluctuating, high-volume, or permanent. A clear framework for comparison prevents, for example, a short-term capacity solution from being compared to a long-term permanent position under different conditions.

2. Document assumptions: Calculate models fairly

Structure the input data and calculate total costs.

Multiply internal hours from HR and the business unit by the respective internal hourly rates. Add advertising and tool costs, onboarding expenses, and estimated vacancy costs.

Organize the inputs by model:

• Internal recruiting: Internal hours, sourcing costs, onboarding, vacancy costs

• Temporary staffing: Billing rate, onboarding (if applicable), vacancy costs; Gross annual compensation and placement fee: –

• Recruitment agency: Annual gross compensation, placement fee, onboarding, vacancy costs; billing rate: –

Next, create a clearly hypothetical calculation example. Use freely chosen values that are clearly labeled as assumptions, and apply the same number of people, duration, and qualifications to all models. This creates a scenario comparison without relying on supposedly typical market prices.

3. Review Results: Evaluate Break-Even and Risk

Modify scenarios and validate the decision.

Calculate multiple variations for duration of engagement, urgency, vacancy costs, and profile scarcity. Also consider the internal recruiting volume and the required degree of flexibility.

The break-even point shifts with every assumption. Therefore, without company-specific figures, it is impossible to specify either a general number of months or a fixed number of hires at which a model becomes more cost-effective.

The final question to ask is: Which solution addresses capacity, time pressure, and risk at the lowest total cost, rather than simply offering the lowest unit price?

Which model fits which demand situation?

The choice does not follow a rigid hierarchy. The demand horizon, internal resources, and risk profile determine which model makes economic sense. Legal and organizational requirements must also be examined before a decision is made.

Strategic tasks can remain in-house, while companies can selectively outsource time-consuming or highly fluctuating process steps. Clear responsibilities prevent duplication of effort and unplanned additional costs.

Short-term and fluctuating capacity

Temporary staffing is suitable for short-term projects, order spikes, seasonal fluctuations, uncertain demand, and situations requiring multiple people simultaneously. The variable cost structure limits long-term commitment.

• Economic rationale: Capacity can be aligned with a defined time period.

• Risks to consider: Duration of assignment, utilization trends, and organizational integration must be planned realistically.

Permanent Positions with Hard-to-Find Profiles

Executive search is suitable for long-term direct hires, hard-to-find qualifications, and limited internal recruiting capacity. Outsourcing the search can relieve the HR team and expand access to suitable candidates.

• Economic rationale: The commission—usually a one-time fee—funds a targeted search for permanent employment.

• Risk to consider: The job requirements, scope of services, and responsibility for selection must be clearly agreed upon.

Regular staffing needs with in-house recruiting capacity

Internal recruiting makes sense when similar roles need to be filled regularly and the HR team can manage the process without disrupting day-to-day operations. Existing knowledge of the organization and functional areas supports the selection process.

• Economic rationale: Existing recruiting structures can be leveraged across multiple hires.

• Risks to consider: Hidden time costs and a growing number of vacancies must not offset the expected cost savings.

Frequently Asked Questions About Cost Decisions

What cost and contractual issues should companies clarify before awarding a contract?

Companies should clarify in writing individual proposals, the scope of services, responsibilities, billing logic, and all pricing components. An additional practical consideration is a fixed approval process for services that go beyond the agreed-upon scope.

When is partial outsourcing of recruiting a sensible addition?

It makes sense when internal teams provide strategic direction but need to compensate for operational bottlenecks. Individual phases or the entire Recruitment Process Outsourcing (RPO) process can include job postings, applicant management, candidate search, pre-screening, hiring, and onboarding.

As an additional practical consideration, shared process documentation should govern the handoffs between internal and external stakeholders.

Conclusion: Cost-effectiveness means the right cost structure

Cost-effectiveness does not mean the lowest rate or the lowest fee, but rather an appropriate cost structure that balances time, capacity, risk, and predictability.

Three questions help narrow down the decision:

1. How long will the staff be needed?

2. How predictable is the need?

3. What internal resources and vacancy risks exist?

For short-term staffing needs, direct permanent hires, or the outsourcing of specific recruiting steps, customized HR solutions are an option.

Would you like to meet your staffing needs, clarify cost issues, and determine the appropriate scope of services for temporary staffing, internal recruiting, or executive search? Please contact us for a no-obligation consultation.