HR-Glossar
Nebenbeschäftigung (secondary employment)
When outside work is permitted in Germany, which limits working time law and competition set and what a duty to notify means.
1. What is Nebenbeschäftigung (secondary employment)?
Nebenbeschäftigung is any gainful activity alongside the main employment relationship – employed, self-employed, or voluntary work that is paid.
The starting point in employment law is clear: outside work is permitted in principle. It falls into the employee's own time, and freedom to pursue an occupation has constitutional protection. A general ban in the employment contract is ineffective.
Limits exist where the employer's legitimate interests are affected:
- Working time law — under Section 2(1) ArbZG the working times of all employers are added together. Maximum working time and the rest period apply to the person, not per employment relationship. - Competition — working for a competitor is impermissible during the employment relationship, even without an express agreement. - Impairment of performance — where the outside work noticeably reduces the work owed. - Holiday — under Section 8 BUrlG no gainful activity contrary to the purpose of the holiday may be pursued during annual leave.
A duty to notify in the employment contract is permissible and widespread – a requirement of consent only so far as it is limited to legitimate interests.
The standard clause imported from other jurisdictions – no outside employment without written consent – fails on the third paragraph above, not on its wording but on its breadth.
2. Origin and development
The question of outside work is as old as employment itself but has gained weight: platform work, freelance side activities and second jobs have become more common.
The courts have drawn a clear line. The employer buys working time, not the person. What happens in someone's free time concerns it only so far as its legitimate interests are affected. Blanket bans and unlimited consent requirements in employment contracts have regularly failed on that.
3. Core principles and how it works
Permitted unless interests stand against it
Permissibility is the rule, a ban the exception that needs justifying.
Working times are added together
Maximum working time applies to the person. Someone with two jobs may not work more in total than the statute allows – and the rest period applies as well.
The competition bar applies without a clause
During an existing employment relationship, work for a competitor is impermissible. A post-contractual ban, by contrast, needs an agreement together with compensation.
A duty to notify yes, a consent requirement only within limits
The employer may want to know what is going on. It must consent where no legitimate interests stand against it.
Social security follows its own rules
Several jobs are added together for contribution purposes; special rules apply to a marginal job alongside a main employment.
4. Who is Nebenbeschäftigung (secondary employment) relevant for?
- Employees with a second activity – for them it is about permissibility and notification. - Employers – they have to keep working time limits and protection against competition in view. - Payroll teams – the contribution treatment depends on the overall position. - Businesses with shift work – rest periods collide there most readily.
5. How it differs from related terms
- Secondary employment and a marginal job – a marginal job is a form of secondary employment with its own contribution treatment. - Outside work and self-employment – the same limits apply in employment law; the tax and social security treatment differs considerably. - Competition bar during and after employment – during the employment relationship it applies by virtue of the duty of loyalty, afterwards only with an agreement and compensation. - Outside work and voluntary activity – unpaid voluntary work is not gainful activity; the limits of working time law do not bite there.
6. Variants and adaptations
- A second employed job – aggregation for both working time and contributions. - A marginal job alongside main employment – the first one regularly keeps its favourable treatment. - Self-employed outside work – its own tax obligations and questions of status. - Outside work during parental leave – permissible to a limited extent, with its own rules. - Outside work during a release from duties – depends on the form of the release.
7. Advantages and challenges
Advantages
- Additional income and professional scope
- Skills that can also benefit the main employer
- For businesses, a way of attracting skilled staff on a part-time basis
- Duties to notify create clarity without a ban
Challenges
- A risk of breaching maximum working time and the rest period
- Exhaustion feeds back into the main employment
- Potential for conflict where the activity is close to competition
- Aggregation for contribution purposes is overlooked and leads to demands
- Ineffective contractual clauses create false security on both sides
8. Best practices for implementation
Agree a duty to notify rather than a ban
A blanket ban is ineffective. A duty to notify with a limited consent requirement holds up and creates an overview.
Ask about working times
Without knowing about the second activity the maximum working time cannot be observed – and the responsibility sits with the employer.
Clarify the contribution position
Where there are several jobs, the personnel questionnaire belongs evaluated, not filed.
Raise proximity to competition early
An open discussion is better than a warning later; the line is often not obvious.
9. Tips for employers and employees
For employers
- **Blanket bans are ineffective** – they create no security, only the appearance of it
- **Maximum working time attaches to the person** – the responsibility is yours, including for the second activity
- **Ask about further employment** – for contribution purposes it is decisive
For employees
- **Notify where the contract requires it** – that is permissible and avoids conflict
- **Observe the rest periods** – they apply across both activities
- **No work for competitors** – that applies even without an express clause
- **Report all your jobs** – otherwise the aggregation reaches you as back payments
10. Conclusion
Outside work is permitted – that is the starting point, and blanket bans in the employment contract change nothing about it, because they are ineffective. The limits sit in three places: maximum working time and the rest period, which apply to the person across both activities; the competition bar, which applies even without a clause; and impairment of the work owed. For businesses the duty to notify is the right instrument – not in order to forbid, but in order to be able to observe the working time limits they are responsible for at all.
For an international group the second of those is the one with teeth. The standard moonlighting clause is unenforceable here in its blanket form, so it provides no protection – while the employer remains answerable for a maximum working time it cannot see. Replacing the ban with a duty to notify is therefore not a concession but the only way to comply.
A note on sources: the Commercial Code has an official English version, cited below. The Working Time Act and the Federal Leave Act do not (checked on 2026-09-27); their German texts govern.
Sources
- Section 2 ArbZG – Definitions (German original; no official English version) (opens in a new tab)
- Section 3 ArbZG – Working time of employees (German original) (opens in a new tab)
- Section 8 BUrlG – Gainful activity during holiday (German original) (opens in a new tab)
- Section 60 HGB – Statutory prohibition of competition (official English version) (opens in a new tab)
Related terms
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