L4 Without Myths: What You Can Really Do on Sick Leave, ZUS Controls After the Reform, and Employee Rights (2026)

Sick leave (commonly referred to as "L4", formally e-ZLA) is one of the most frequently used – and most mythologized – employee rights. Is it allowed to go to the store? Can you travel? Does ZUS "track Facebook"? When can an employer dismiss a sick employee? This guide answers the most common questions about L4 based on regulations and case law, not forum legends – with current amounts and rules for 2026 – taking into account the major reform of L4 controls that came into effect on April 13, 2026.

Last verification: July 21, 2026 (sick leave act – t.j. Dz.U. 2026 poz. 854, Labor Code – t.j. Dz.U. 2025 poz. 277, reform – Dz.U. 2026 poz. 26). Informational material – not legal advice. For individual matters, confirm your situation with ZUS (helpline 22 560 16 00) or with a labor law attorney.

In Brief

How L4 Works Formally

Who Pays and How Much

For the first 33 days of incapacity in the calendar year (14 days for an employee over 50), you receive sick pay from the employer: 80% of the base, and 100% in cases such as pregnancy, accidents on the way to/from work, and for donor examinations (art. 92 KP). From the 34th (15th) day – sick benefit: paid by ZUS, and for employers reporting more than 20 insured individuals – by the employer themselves (art. 61 of the sick leave act). The benefit is generally 80% of the base (average from 12 months), also for days off; 100% – pregnancy, accident on the way, donors. Hospital stay also means 80% – the previous 70% was abolished in 2022. An accident at work and occupational disease have a separate regime: 100% from accident insurance from the first day, without a waiting period. The much-publicized announcement that "from 2026 sick pay from the first day will be taken over by ZUS" has not been passed – the project has been postponed and art. 92 KP remains unchanged.

How Long Can You Be Sick

Maximum 182 days (for tuberculosis and pregnancy – 270 days) – art. 8 of the sick leave act. Previous incapacity is counted towards one benefit period if the break between them did not exceed 60 days – regardless of whether it is the same illness (art. 9; exception: incapacity during pregnancy after a break counts from the beginning). After exhausting the limit, if further treatment indicates a return to work, you may receive rehabilitation benefit – for a maximum of 12 months: 90% of the base for the first 3 months, then 75% (100% in pregnancy); determined by a ZUS medical expert. After that, you remain eligible for a disability pension.

Waiting Period – When is the Benefit Due

The benefit is due after the so-called waiting period (art. 4 of the sick leave act): 30 days of continuous insurance with an employment contract, 90 days with voluntary insurance (contract, business activity). Previous insurance periods are counted if the break is up to 30 days. Without waiting (from day 1): graduates of schools and universities (if they join the insurance within 90 days of graduation), individuals with at least 10 years of previous mandatory sick insurance, and incapacity due to an accident on the way to/from work.

60 Questions? Here Are the Ones That Really Matter

Advertisements for e-books promise "60 questions about L4". The truth is simpler: most of them are variations of a dozen key issues. Below are all the important ones – grouped so you can find the answer in 30 seconds.

What is Allowed and What is Not on L4

Code "1" and Code "2" – What Do They Mean

The doctor marks in e-ZLA the indication: "1 – the sick should lie down" or "2 – the sick can walk" (art. 55 sec. 3 of the sick leave act). Code 2 does not mean "do whatever you want" – it means that leaving the house for ordinary activities does not violate the purpose of the leave. From April 13, 2026, the boundaries are finally explicitly stated in the law (art. 17 sec. 1a–1b, Dz.U. 2026 poz. 26): sanctions do NOT cover ordinary daily activities or incidental activities required by significant circumstances – with the law explicitly stating that "significant circumstances" do not include an employer's order. This statutory adoption reflects the long-standing line of the Supreme Court.

List: Safe vs Risky

Controls: Who, When, and How

Two Types of Controls

There are two independent procedures – and both underwent a major reform in 2026:

• Medical examination control (art. 59 of the sick leave act, new wording from 27.01.2026): a ZUS medical expert checks whether you are still unable to work. ZUS can summon you for an examination (also at your residence), order auxiliary examinations, and request documentation. New: they can also notify you by phone or email.
• Control of proper use (art. 68–68f, from 13.04.2026): checks whether you are not working and not acting against the purpose of the leave. Conducted by ZUS, as well as the employer: paying benefits (over 20 insured individuals) – towards their employees, and any employer – during the sick pay period from art. 92 KP. The old regulation from 1999 on control has been repealed – the procedure is now in the law: the controller must have written authorization, the control must be proportional and respect privacy, and a protocol must be drawn up, to which you can raise objections within 7 days, with doubts resolved by ZUS.

You Were Not Home – What Now

Simply being absent during the control of use does not automatically revoke the benefit – the controller prepares a protocol, and you have the right to explain your absence (doctor's visit, pharmacy, rehabilitation – these are normal justifications; keep confirmations). A more serious issue is playing with addresses: in e-ZLA, you provide your residence address, and you must inform the payer and ZUS of any change during the leave within 3 days (art. 59 sec. 5e). If you do not do this, a summons sent to the old address is considered effectively delivered (sec. 5f) – and "failure to appear" results in the invalidation of the leave and a decision of no right to the benefit.

Summons for Examination by a Medical Expert

A summons for examination is mandatory. Failure to appear or preventing the examination = the leave loses validity from the day following the scheduled date (art. 59 sec. 6), ZUS issues a decision of no right to the benefit and notifies the employer. If you cannot attend (e.g., you are bedridden), inform ZUS – the examination can take place at your residence. ZUS reimburses travel costs for the examination. Your employer can also request a medical examination control.

Employer and Your L4

Can They Dismiss You While on L4?

During justified absence, the employer cannot issue a dismissal (art. 41 KP; exception: bankruptcy or liquidation of the company). However, protection is not eternal – after the periods in art. 53 § 1 KP, the employer can terminate the contract without notice, without employee fault: if incapacity lasts longer than 3 months (employment with this employer shorter than 6 months) or longer than the total period of receiving sick pay and benefits plus the first 3 months of rehabilitation benefits (at least 6 months of employment or an accident at work). If you return to work before these periods expire, termination in this manner is inadmissible, and the dismissed employee who reports within 6 months should be given work again by the employer as far as possible. Note: protection from art. 41 KP does not protect against disciplinary action (art. 52 KP) for serious abuse of leave – the Supreme Court confirms that work or activities undermining the purpose of L4 can justify it (judgments II PK 14/16, I PK 208/02), though not automatically.

Employer Challenges the Leave

The employer cannot "invalidate" e-ZLA on their own – they can: request a medical examination control from ZUS (art. 59 sec. 12), conduct a control of use (as described above), and suspend payment only based on the findings of the control/decision. If the employer unjustifiably withholds sick pay or benefits – file a complaint with PIP (pip.gov.pl), request ZUS to determine the right to benefits, and ultimately go to the labor court (appeals and lawsuits by employees are exempt from court fees).

L4 and Abroad

Illness during a stay in the EU/EFTA: the benefit is paid by the country where you are insured, regardless of your location (art. 21 of regulation 883/2004) – ZUS will also transfer the benefit to a foreign account. Foreign medical certificates are accepted: a document with the name of the medical facility or the doctor's name, date of issue, signature, and period of incapacity is sufficient; issued in the official languages of the EU/EFTA does not require translation (regulation on documents for benefits, t.j. Dz.U. 2026 poz. 890). While abroad, you are also subject to control – ZUS can order an examination by the institution of the host country. Remember: EKUZ is only for treatment, not for cash benefits. Conversely, for the Polish diaspora working abroad: you apply for sick benefits in the country where you are insured (e.g., in the USA – according to local rules), not in ZUS.

ZUS Took Your Benefit – How to Appeal

FAQ – Quick Answers

Do I have to deliver L4 to my employer?

No – e-ZLA is automatically sent to ZUS and the payer's profile, at the latest the next day. However, you must inform about your absence immediately, no later than the 2nd day, in the manner accepted in the company (phone, email).

Can a doctor issue L4 retroactively?

Up to 3 days retroactively before the examination date (if the examination confirms previous incapacity); psychiatrists can go further – in cases of disorders limiting the ability to assess one's own behavior (§ 7 of the regulation from 10.11.2015).

Can I pick up my child from school or do shopping while on L4?

With the indication "can walk" – yes, ordinary daily activities have been explicitly excluded from sanctions since April 13, 2026 (art. 17 sec. 1b). With "should lie down" limit outings to necessary ones (doctor, pharmacy).

My boss calls me to "just reply to one email" – can I?

Be cautious: incidental activities forced by significant circumstances are allowed, but the law explicitly states that an employer's order is not such a circumstance (art. 17 sec. 1a). Working "because the boss asked" can cost you the entire benefit.

Can ZUS check a one-day L4?

They can check any – in practice, they target longer and frequent leaves, leaves around weekends/vacations, and after reports. Short L4s are also checked for "recidivists".

What are the consequences of working while on L4?

Loss of benefits for the entire period of leave + return of received amounts with interest (art. 17 and 66 of the sick leave act), and in extreme cases, disciplinary action. A forged certificate = loss of right to benefits and criminal liability.

Can I shorten L4 and return earlier?

Formally, the leave covers the indicated period; returning early requires a certificate of regained ability (for leaves longer than 30 days – control examinations by occupational medicine before being allowed back, art. 229 KP).

Does the period of L4 count towards vacation and seniority?

Seniority continues normally. Vacation cannot be granted or started during L4 – illness interrupts vacation (art. 165–166 KP).

Fact-Check Summary

Definitely true: verified in consolidated texts and amending acts (sick leave act – Dz.U. 2026 poz. 854; Labor Code – Dz.U. 2025 poz. 277; reform – Dz.U. 2026 poz. 26; regulation on documents – Dz.U. 2026 poz. 890): 33/14 days of sick pay 80% and cases of 100% (art. 92 KP); benefit 80%, hospital also 80% since 2022 (art. 11); benefit period 182/270 days and counting with a break of up to 60 days (art. 8–9); rehabilitation benefit 12 months, 90/75/100% (art. 18–19); waiting period 30/90 days (art. 4); e-ZLA automatically to ZUS and the payer, information about absence no later than the 2nd day; issuing up to 3 days retroactively, psychiatrist longer; loss of benefit for the entire period for paid work or acting against the purpose (art. 17), with statutory exclusions for daily life activities and incidental activities from April 13, 2026 (art. 17 sec. 1a–1b); medical examination control with the sanction of loss of validity from the day after the examination date (art. 59), obligation to report a change of residence within 3 days (art. 59 sec. 5e–5f); new statutory procedure for control of use from April 13, 2026 (art. 68–68f), repeal of the 1999 regulation; protection from art. 41 KP and limits from art. 53 KP; objection within 14 days, appeal to court within a month, free of charge (art. 96 of the social insurance act); EU coordination – benefits paid abroad, foreign certificates without translation (EU/EFTA); reform "ZUS pays from day 1" NOT passed

Probably true (case law/practice): the Supreme Court's line on incidental and formal activities of entrepreneurs (II UK 186/11, II UK 359/08 – now codified); disciplinary action for abuse of L4 is possible, but exceptional (II PK 14/16, I PK 208/02); a wedding on L4 "can walk" is not automatically a serious violation (I PKN 14/98); practice of targeting leaves for control and high success rate of appeals in cases of "incidental" activities – experience from case law, not regulation

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