Introduction: What Is L4 and Why Does It Matter
L4 is the unofficial name for the electronic medical certificate of incapacity for work (e-ZLA, elektroniczne zaświadczenie lekarskie). The name has been in use since the times when the corresponding form was called «Formularz L4». Today, doctors issue it exclusively in digital format: the document is automatically sent to the employer and to ZUS (Zakład Ubezpieczeń Społecznych — the Social Insurance Institution).
Entitlement to paid sick leave depends directly on the type of contract with the employer and on whether sickness insurance contributions (składka chorobowa) have been paid. This is precisely what determines who pays — the employer or ZUS.
Umowa o pracę: The Gold Standard of Protection
The employment contract (umowa o pracę) provides the most comprehensive protection for the employee.
Mandatory Insurance
Under an umowa o pracę, contributions to ubezpieczenie chorobowe are deducted automatically — the employer is obligated to remit them to ZUS without any application from the employee. This is the key advantage over other contract types.
Okres wyczekiwania — Waiting Period: 30 Days
The right to paid sick leave does not arise immediately. To receive benefits, the employee must have worked continuously under an umowa o pracę for at least 30 days. Before that period, a sick employee will not receive any financial compensation. The exception is a workplace accident — in that case, the waiting period does not apply.
Benefit Amounts
| Situation | Amount |
|---|---|
| Illness, quarantine | 80% of the base (wynagrodzenie chorobowe) |
| Pregnancy | 100% |
| Workplace accident or accident on the way to/from work | 100% |
Who Pays and How Much?
- The first 33 days of illness per year are paid by the employer — this is called wynagrodzenie chorobowe. The funds come from the company's own resources.
- From the 34th day onwards, payments are taken over by ZUS — this becomes the zasiłek chorobowy.
- For employees over 50 years of age, the employer pays for only 14 days, with ZUS stepping in from day 15.
Umowa zlecenie: A Matter of Choice
The civil law contract (umowa zlecenie) is flexible, but obtaining protection requires deliberate action.
Voluntary Insurance — The Key Detail
Unlike the umowa o pracę, the składka chorobowa under an umowa zlecenie is voluntary. This means: if the worker does not personally apply to the employer to be enrolled in the insurance scheme, they will receive nothing in the event of illness. The contribution rate is modest — 2.45% of the assessment base — so opting out is highly inadvisable.
How to enrol: you need to submit a written application to the employer (zleceniodawcy) requesting registration with ZUS for voluntary sickness insurance. Once enrolled, contributions will be deducted automatically from your remuneration.
Okres wyczekiwania — Waiting Period: 90 Days
Entitlement to zasiłek chorobowy under an umowa zlecenie arises only after 90 consecutive days of paying contributions. A gap in payments — even for a single month — resets the counter to zero.
Benefits and Source of Funding
Under an umowa zlecenie, there is no concept of «wynagrodzenie chorobowe» from the employer. The entire zasiłek chorobowy is paid by ZUS — at 80% of the base (the average remuneration over the previous 12 months).
Comparison Table: UoP vs Umowa zlecenie
| Parameter | Umowa o pracę | Umowa zlecenie |
|---|---|---|
| Insurance | Mandatory | Voluntary |
| Waiting period | 30 days | 90 days |
| Standard benefit | 80% of salary | 80% of base |
| Benefit during pregnancy / accident | 100% | 100% (workplace accident only) |
| Who pays (days 1–33) | Employer | ZUS (from day 1) |
| Who pays (from day 34) | ZUS | ZUS |
Exceptions and Special Cases
Umowa o dzieło — No Right to L4
A contract for specific work (umowa o dzieło) completely excludes the possibility of paying składka chorobowa. The contractor pays no sickness insurance contributions and therefore has no entitlement to either wynagrodzenie chorobowe or zasiłek chorobowy. There are no exceptions.
B2B (Sole Trader / Self-Employed)
Entrepreneurs operating under the B2B model may voluntarily pay składka chorobowa to ZUS. The same rules apply as for the umowa zlecenie: a waiting period of 90 days and a benefit of 80% of the declared base. It is essential not to miss any payments — skipping even a single month means losing the right to benefits.
Conclusion
In Poland, the type of contract determines everything. Not seniority, not loyalty to the employer — it is precisely the line in the contract that decides whether you will receive money when you fall ill.
In brief:
- Umowa o pracę — insurance is activated automatically. Work for 30 days, fall ill, take L4. The first 33 days are paid by the employer, then ZUS takes over.
- Umowa zlecenie — without a personal application for voluntary insurance (składka chorobowa), you are invisible to ZUS. Enrol immediately and then wait 90 days.
- Umowa o dzieło — there is no right to L4 whatsoever. No exceptions.
It is worth checking the terms of your contract in advance — ideally before the need actually arises.
This article has been prepared on the basis of current Polish legislation and official ZUS sources as of January 2026.
