Can I have a side job in Finland?
Yes — your free time is your own. The Employment Contracts Act doesn't ban side jobs: working for another employer or running a sole tradership on your own time is allowed by default, no permission needed. Three limits: no competing activity that evidently harms your employer, the side job can't hamper your main job (fatigue, lateness), and contractual notice or consent clauses bind where agreed. Blanket bans on full-timers are read strictly against the employer.
📋 The rules
- Side work on free time is allowed by default — no permission needed absent an explicit contract clause.
- The competing-activity ban (ECA 3:3): no work that evidently harms your employer as an act of competition — same industry plus same clients is the dangerous combo.
- The side job may not hamper the main one: shifts, safety and working-time rest periods come first.
- Contractual notification or consent clauses bind when reasonable — a groundless total ban is unreasonable.
- Tax runs through an additional withholding rate or prepayments for a business name — YEL insurance kicks in as entrepreneur income grows.
🔓 Exceptions
- Civil servants and some roles (police) need side-job notifications or permits under service rules.
- When laid off or unemployed the rules change — adjusted unemployment benefit and TE notifications enter the picture.
⚠️ Penalties
Competing activity is a serious breach: warning, termination and damages are possible. Hiding a side job against a clause can bring a warning — a harmless side job alone grounds nothing.
📎 Sources
- Finlex · Employment Contracts Act 55/2001 (ch. 3 s. 3) →
- Occupational Safety Administration · Employment terms →
- Tax Administration · Taxing side income →
❓ Frequently asked questions
Must I tell my employer about a side job?
Only if your contract or collective agreement requires it — the law sets no duty. Openness does pre-empt competing-activity suspicions.
What counts as competing activity?
Work that evidently harms your employer: competing for the same industry's clients, exploiting trade secrets. Gigs in a different field aren't competition.
Can my employer ban all side jobs?
Not reasonably — a groundless total ban is an unreasonable term. Competing activity can always be banned.
How is side income taxed?
Salary via an additional withholding rate; business income via prepayments. Mind the YEL threshold as entrepreneur income grows (~€9,700/yr in 2026).
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