Can I have a side job in Finland?
Yes — your free time is your own. The Employment Contracts Act does not 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 must not hamper your main job (fatigue, lateness, rest periods), and contractual notice or consent clauses bind where reasonable. Side-job bans are read strictly against the employer: a groundless blanket ban is an unreasonable term. Tax runs through an additional withholding rate or business prepayments — and YEL insurance arrives as entrepreneur income grows.
📋 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.
- Working-time rest periods bind side-jobbers too: the main job and the side job together cannot eat into statutory rest, however voluntary both are.
⚠️ Penalties
Competing activity is a serious breach: it can bring a warning, termination of the employment and damages — and damages are measured by the harm to the employer, not by what the side job earned. A side job hidden in breach of a contractual clause can bring a warning even when the work itself is entirely harmless. A side job that causes no harm and creates no competition, on the other hand, grounds nothing — a groundless blanket ban is an unreasonable term. Remember the tax office too: undeclared side income means back taxes and a punitive increase.
📎 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 imposes no general duty to notify. Openness still pays: it pre-empts competing-activity suspicions that are laborious to undo afterwards.
What counts as competing activity?
Work that evidently harms your employer: competing for the same industry's clients or exploiting trade secrets. Gigs in a different field are not competition, even if they take up your time.
Can my employer ban all side jobs?
Not reasonably — a groundless blanket ban is an unreasonable contract term and is read strictly against the employer. Competing activity, on the other hand, can always be banned. Reasonableness is judged case by case.
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 at the 2026 level) — and undeclared income brings back taxes.
Can a side job be a problem even if it does not compete?
It can, if it hampers the main job: fatigue, lateness or breaching statutory rest periods are valid grounds to intervene. Occupational safety always comes before the side job. A contractual notice or consent clause also binds where reasonable.
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