The Core Question: Flexibility vs. Continuity
Companies regularly face a strategic staffing decision: Should an open position be filled permanently — or is temporary staff through staff leasing the smarter solution? The answer is rarely one-size-fits-all, because both models have strengths that tip the scales depending on the situation.
Permanent employment offers stability, identification with the company and the development of internal know-how. Temporary staffing, on the other hand, enables short-notice response to order peaks, project work without long-term commitment and access to staff who are immediately deployable.
In practice, most companies need both. The decisive question is not "either/or" but "when which." That is exactly what we clarify in this guide — with concrete scenarios, an honest cost comparison and the legal framework you need to know as a client.
The best staffing strategy is rarely purely flexible or purely permanent — it is the right mix at the right time.
Staff Leasing (Arbeitnehmerüberlassung): What It Actually Means
Staff leasing — known in Germany as Arbeitnehmerüberlassung or Zeitarbeit — is a clearly regulated triangular relationship: A staffing agency (the lender) employs workers and assigns them to a client company (the borrower) for a defined period. The employment contract exists between the temporary worker and the staffing agency, not with the client company.
For the client company, this means: You receive qualified staff without acting as the employer yourself. The staffing agency handles payroll, social security contributions, holiday entitlements and the full employer risk. You pay an agreed hourly billing rate — and can end the assignment when the need passes.
Important: Staff leasing is not an unregulated space. In Germany, the Temporary Employment Act (Arbeitnehmerüberlassungsgesetz, AÜG) strictly governs the framework. This includes maximum assignment duration, equal pay regulations and the requirement for a licence from the Federal Employment Agency. Reputable staffing providers like höchstmass hold this licence and ensure full compliance with all legal requirements.
When Temporary Staffing Makes Sense: 5 Typical Scenarios
Temporary staffing is not a stopgap measure — it is a strategic tool when deployed in the right situations. Here are the five most common scenarios from our consulting practice:
1. Seasonal Demand Peaks
Your business has predictable high phases — such as trade show season, the Christmas period or summer season in hospitality. During these times you need more staff than in the normal phase, but a permanent hire for three months of additional demand does not pay off. Temporary staffing allows you to scale up for exactly the required period and then return to normal levels without having to issue terminations.
2. Project-Based Staffing Needs
You are implementing a new IT system, restructuring a warehouse or organising a major event. The project has a clear end date — and afterwards you no longer need the additional staff. Temporary staffing is the logical choice here: you get specialists for the project duration and avoid the overhead of a permanent hire for a time-limited task.
3. Cover for Sick Leave and Parental Leave
A team member goes on parental leave, a colleague is on long-term sick leave. The position must be filled, but only temporarily. A permanent hire would be problematic because the role will be occupied again when the regular employee returns. Temporary staffing bridges these phases seamlessly — and the returning colleague comes back to a functioning workplace.
4. Market Uncertainty and Testing Phase
You are expanding into a new market, opening an additional location or launching a new business area. Whether the additional staffing need will be permanent is still unclear. Temporary staffing gives you the ability to build up personnel without committing long-term. If the business takes off, you can take on the best performers permanently (see: Temp-to-Perm). If not, you scale back.
5. Skills Shortage and Long Hiring Timelines
The time-to-hire for skilled workers in many industries is three to six months. During this time, work piles up — or the existing team becomes overburdened. Temporary staffing can fill the gap while you search in parallel for the perfect permanent hire. This way you avoid revenue losses and keep the workload on your core team manageable.
Temporary staffing is most effective when the need is clearly defined, time-limited or still uncertain. As soon as the need becomes permanent and predictable, the case for permanent employment grows strong.
When Permanent Employment Is the Better Choice
Temporary staffing does not solve every personnel challenge — and should not try to. There are clear situations where permanent employment is economically and organisationally superior:
- Permanent, predictable demand: When a position needs to be filled indefinitely and the budget is available, permanent employment is almost always cheaper than ongoing temporary staffing.
- Knowledge-intensive roles: Positions where deep company knowledge must be developed — such as product development, controlling or executive management — require continuity that temporary staffing structurally cannot provide.
- Company culture and team dynamics: When the role is deeply embedded in company culture and requires long-term relationships with customers, colleagues or suppliers, permanent employment is preferable.
- Safety-critical areas: In regulated industries with high compliance requirements (e.g. pharmaceuticals, aviation), audit requirements may necessitate filling key positions permanently.
- Employer branding: Companies that want to be perceived as attractive employers signal stability and appreciation through permanent contracts — this attracts better candidates.
The honest answer is: If you are using the same temporary worker for longer than 12 months, you should evaluate whether a permanent takeover is not more economical and legally cleaner. Beyond a certain assignment duration, the costs of staff leasing significantly exceed those of permanent employment.
Cost Comparison: The Hidden Costs of Both Models
The most common mistake in comparison: Companies set the gross salary of a permanent position against the hourly billing rate of temporary staffing — and conclude that temporary staffing is more expensive. This calculation is incomplete.
True Cost of Permanent Employment
Beyond the gross salary, permanent employment incurs numerous additional costs that are often overlooked:
- Employer's social security contributions: approx. 20-21% of gross salary (in Germany)
- Recruiting costs: Job advertisements, recruitment consultants, internal time investment — depending on the position, EUR 5,000 to 25,000 per hire
- Onboarding period: 1-6 months during which the new hire is not yet fully productive
- Continued pay during illness: Up to 6 weeks of full salary (German law)
- Holiday entitlement: 20-30 days per year when you pay salary but receive no output
- Termination costs: Severance pay, legal advice, garden leave in case of a bad hire
- Administrative overhead: Payroll processing, HR processes, equipment, training
True Cost of Temporary Staffing
The hourly billing rate for temporary staffing appears higher at first glance — but it already includes:
- Gross salary of the temporary worker
- All social security contributions
- Holiday and sick leave costs
- Recruiting and administration
- The staffing provider's margin
This means: The hourly billing rate is an all-inclusive price. You have no hidden ancillary costs, no risk in case of absence and no administrative burden.
Rule of thumb: For assignments up to 6 months, temporary staffing is frequently cheaper than permanent employment — when you factor in all costs. From 12 months onwards, the ratio typically tips in favour of permanent employment.
Calculation Example
An example for a helper position in the trade show and event sector:
- Permanent employment: EUR 2,500 gross/month + approx. EUR 525 employer contributions + pro-rata recruiting costs + onboarding = effectively approx. EUR 3,500-4,000/month in the first 6 months
- Temporary staffing: approx. EUR 22-28 hourly billing rate = approx. EUR 3,500-4,500/month full-time — but immediately deployable, no recruiting, no risk
For short-term needs (1-6 months), temporary staffing saves recruiting and onboarding costs. For long-term needs (12+ months), permanent employment becomes more cost-effective through the saved billing rate premium.
Legal Framework: What Clients Need to Know
Germany's Temporary Employment Act (Arbeitnehmerüberlassungsgesetz, AÜG) was fundamentally reformed in 2017 and sets clear boundaries for the use of temporary staffing. As a client (borrower), you should be aware of the following regulations:
Maximum Assignment Duration: 18 Months
A temporary worker may be assigned to the same client for a maximum of 18 consecutive months. After this period expires, a break of at least 3 months must be observed before the same employee can be assigned again. Deviations are only possible through collective bargaining agreements or works agreements based on a collective agreement — in some industries, an extension to up to 24 months is provided for.
Important: The 18-month limit is person-based, not position-based. You cannot simply swap the temporary worker to circumvent the deadline if the workplace remains the same and an intent to circumvent is evident.
Equal Pay After 9 Months
After 9 months of uninterrupted assignment to the same client, the temporary worker is entitled to equal pay — meaning the same remuneration as comparable permanent employees of the client. This covers not only the base salary but also surcharges, allowances, special payments and benefits in kind.
In practice, this means: From the 10th month onwards, the hourly billing rate increases significantly because the staffing provider must pass on the equal pay differential to the temporary worker. For clients, this is another reason to consider a permanent takeover for long-term assignments.
Further Important Regulations
- Licence requirement: The staffing provider requires a licence for temporary employment from the Federal Employment Agency. Without this licence, the assignment contract is void — and an employment relationship automatically arises between the temporary worker and the client.
- Labelling obligation: The staff leasing contract must be explicitly labelled as such. Covert staff leasing is illegal.
- Strikebreaker prohibition: Temporary workers may not be used as replacements for striking employees.
- Information obligation: The client must inform temporary workers about vacant positions within the company.
- Equal treatment: Temporary workers have access to communal facilities (canteen, childcare, transport) on the same terms as the permanent workforce.
Legal compliance in staff leasing is not a nice-to-have. Violations can lead to the creation of unintended employment relationships and are penalised with fines of up to EUR 30,000.
The Hybrid Model: Temp-to-Perm
Between temporary and permanent employment lies an elegant middle ground: Temp-to-Perm — the transition of temporary workers into permanent employment. This model combines the advantages of both worlds and minimises the risks.
Here is how it works: You initially deploy a temporary worker for several months. During this time, both sides get to know each other — you observe professional performance, cultural fit and team dynamics. The employee learns your company, processes and team. If it works for both sides, the transition to permanent employment follows.
Advantages of the Temp-to-Perm Model
- No bad hire risk: You already know the employee from practice — not just from the interview
- No onboarding phase: The employee is already productive on the day of the transition
- Lower turnover: Employees hired through Temp-to-Perm statistically stay longer with the company
- Planning certainty: You can confirm the staffing need before committing long-term
What Does the Takeover Cost?
Most staffing providers agree on a placement fee for the takeover. This is typically tiered: The longer the temporary worker has already been on assignment, the lower the fee. After 12-15 months, the placement fee is waived entirely by many providers. At höchstmass, we advise you transparently about the conditions — and actively support takeovers when they make sense for everyone involved.
Decision Guide: Checklist
Use the following checklist to make the right decision for your specific situation. The more points apply in one column, the clearer the recommendation.
Temporary staffing is the right choice when:
- The need is limited to fewer than 12 months
- There are seasonal fluctuations or project-based work
- You need staff at short notice (within days)
- You do not want to bear the employer risk
- You want to test an employee before making a permanent hire (Temp-to-Perm)
- The position does not require deep company knowledge
- You have cover requirements (illness, parental leave, sabbatical)
- Your HR team currently has no capacity for recruiting
Permanent employment is the right choice when:
- The need is long-term and predictable
- The position requires deep company or industry knowledge
- Continuity in the customer relationship is business-critical
- You want to build your employer brand strategically
- It is a leadership position
- The onboarding period is long and the investment should pay off over the long term
- Regulatory requirements demand a permanent assignment
- You want to develop and retain the employee long-term
In reality, points from both columns often apply simultaneously. In that case, a personal conversation with an experienced staffing provider who offers both models and can advise neutrally is worthwhile. Through our temporary staffing services, we support you with both temporary personnel and placement into permanent employment.
The right staffing strategy is not a matter of belief. It follows from your specific need, your budget and your time horizon. Those who calculate honestly make the better decision.