ZUS inspection at a company: what it checks, how long it takes and how to prepare

A ZUS inspection checks whether, as a contribution payer, you correctly register people for insurance, calculate and pay contributions and pay out benefits. If you are an entrepreneur, you first receive a notice, and the inspector may start no earlier than 7 days and no later than 30 days after it is delivered. At a micro-entrepreneur, all ZUS inspections may take a total of 6 working days per year; at the largest companies – 48. The inspection ends with a report, to which you have 14 days to file objections.

Who and what ZUS inspects

Inspections are carried out by inspectors of ZUS (Social Insurance Institution) at contribution payers (Article 86(1) of the Act on the Social Insurance System (ustawa o systemie ubezpieczeń społecznych), hereinafter: the “System Act”). The scope of an inspection is defined in Article 86(2). The inspector may check in particular:

• registration for social insurance – including whether it was done on time (as a rule, 7 days from the date the insurance obligation arose – Article 36(4));
• the correctness and accuracy of calculating, withholding and paying contributions and other payments collected by ZUS;
• determining entitlement to social insurance benefits, paying them out and settling them – and therefore also sickness and other benefits, if you are the one who pays them;
• preparing applications for retirement and disability pensions, issuing certificates and reporting data for insurance purposes;
• the data provided in an application for exemption from paying contributions under Article 17a of the System Act (the so-called contribution holidays, wakacje składkowe);
• assets – but only at a payer who is in arrears with contributions.

Contracts of mandate, contracts for specific work and concurrent insurance titles

Contractors under a contract of mandate (umowa zlecenia) – an agency contract, a mandate contract or another contract for the provision of services to which the rules on mandate apply – are, as a rule, subject to mandatory retirement and disability insurance (Article 6(1)(4); the exception is pupils and students until they turn 26 – Article 6(4)). Contracts for specific work (umowa o dzieło) are not in this catalogue, with one important exception: a person who concluded a mandate contract or a contract for specific work with their own employer, or performs it for the employer's benefit, is treated as an employee for insurance purposes (Article 8(2a)). So expect questions about what was actually the subject of a contract labelled a “contract for specific work”.

Every contract for specific work concluded with a person who is not your employee must be reported to ZUS within 7 days of its conclusion (Article 36(17); RUD form). Where insurance titles concur (for example, a full-time job at another company and a mandate contract with you), Article 9 of the System Act determines which title gives rise to mandatory insurance. From 8 July 2026 the Act also provides for an ICT system for exchanging data between ZUS, the National Labour Inspectorate (PIP) and the Head of the National Revenue Administration (KAS) for risk analysis purposes (Article 68ac), and ZUS makes available to the labour inspectorate, among other things, data on reported contracts for specific work (Article 50(13a)(3)).

How ZUS selects companies for inspection

From 1 January 2026, planned inspections are based on risk categories: after an analysis of the likelihood of a breach of the law, entrepreneurs are assigned to low, medium or high risk (Article 47(1) of the Entrepreneurs' Law (Prawo przedsiębiorców)). The frequency of planned inspections depends on the category (Article 55a(1)):

• low risk – no more than once every 5 years;
• medium risk – no more than once every 3 years;
• high risk – as often as necessary for the effective application of the law.

ZUS states in its Public Information Bulletin (BIP) that it adopted risk analysis as of 1 January 2026, and that the category is affected by, among other things, the number of registered insured persons, the PKD business activity code, the ratio of benefits paid out to contributions due, and concurrent insurance titles. You will learn your category from the notice of a planned inspection (Article 48(3)(4b)). The limits apply only to planned inspections – the plan does not apply, among other cases, where there is a reasonable suspicion that an offence, a petty offence or another breach of a legal obligation has been committed (Article 47(2)(1)).

Notice of intent to initiate an inspection

ZUS notifies an entrepreneur of its intent to initiate an inspection (Article 48(1) of the Entrepreneurs' Law, applied to ZUS inspections under Article 92a of the System Act). The inspection starts no earlier than 7 days and no later than 30 days after the notice is delivered; after that deadline a new notice is required (Article 48(2)). At your request it may start earlier (Article 48(4)).

Since 13 July 2025 the notice also contains a preliminary list of the documents and information the authority expects (Article 48(3)(4a)). This is not a closed catalogue – the inspector may also request other documents related to the scope of the inspection (Article 48(12)). No notice is given, among other cases, where the inspection is necessary to prevent an offence or a petty offence from being committed or to secure evidence (Article 48(11)(2)).

The inspector initiates the inspection itself after showing a service ID and delivering the inspection authorisation; the date of delivery of the authorisation is the date the inspection is initiated (Article 89(1) and (2) of the System Act). Check the scope in the authorisation as well as the start date and the expected end date of the inspection (Article 89(1a)) – the inspection may not go beyond that scope (Article 49(9) of the Entrepreneurs' Law). Also present your inspection log book (książka kontroli) (Article 57(6)). I write about the objection and your other rights in the article the entrepreneur's rights during an inspection.

Where the inspection takes place and how long it lasts

Inspection activities are carried out at the payer's registered office and places of business, as well as at third parties entrusted with some activities under a separate contract (Article 90(1) of the System Act). With your consent, the inspection may take place where the documentation is kept, at a ZUS office or remotely (Article 51(2)–(3a) of the Entrepreneurs' Law).

The duration of all ZUS inspections at an entrepreneur in a single calendar year is limited by Article 55(1) of the Entrepreneurs' Law:

Status also depends on turnover or balance sheet total. The limit for micro-entrepreneurs was reduced from 12 to 6 working days as of 13 July 2025. An inspection at a micro-entrepreneur may nevertheless be extended – to no more than twice the limit – if, after the activities at the company have been completed, all that remains is collecting and analysing documents and drawing up the report (Article 55(6a)). Otherwise, an extension is possible only for reasons beyond the authority's control, requires written justification and may not breach the annual limit (Article 55(3)). The limits do not apply, among other cases, where the inspection is necessary to prevent an offence or a petty offence from being committed (Article 55(2)(2)).

The inspector's powers and the payer's obligations

A ZUS inspector has the right to (Article 87(1) of the System Act):

• examine books, financial, accounting and personnel documents and other data carriers related to the scope of the inspection;
• secure evidence and request information from the payer and the insured persons;
• check the identity of persons, if this is necessary for the purposes of the inspection;
• summon and question witnesses and, where other evidence is insufficient, also the payer and the insured person.

You are obliged (Article 88(1)) to make available documents related to the scope of the inspection – including those kept at third parties – to provide copies of them, to ensure working conditions for the inspector, to give explanations and to provide a Polish translation of foreign-language documentation. You do this free of charge, and you deliver the requested documents within the time limit set by the inspector (Article 88(2) and (3)).

You also have rights: you may take part in the activities in person or through a designated person (Article 89(4)), and the inspector should notify you of the questioning of witnesses and of site inspections so that you can take part (Article 89(5)). Preventing or obstructing an inspection is a petty offence (Article 98(1)(3)) – so exercise your rights through the statutory procedures.

Documents ZUS usually asks for – a checklist

The starting point is the preliminary list from the notice. Treat the list below, based on the scope of inspection under Article 86(2) of the System Act, as an aid for your own review:

• the inspection log book and the authorisations and reports from previous inspections (Article 57(1) of the Entrepreneurs' Law);
• insurance registrations and deregistrations;
• settlement declarations and personal monthly reports together with corrections – you keep copies for 5 years from their submission to ZUS (Article 47(3c));
• personnel files and employment contracts;
• contracts of mandate, contracts for specific work and other contracts for the provision of services – with the bills issued under them, and for contracts for specific work also with confirmations of reporting (RUD);
• contractors' declarations and other documents on the basis of which the insurance title was determined in the case of concurrent titles;
• payroll records, remuneration records and financial and accounting documents confirming payments and the payment of contributions;
• benefit documentation – if you pay out social insurance benefits;
• a written designation of the person authorised to represent you during the inspection (Article 50(3) of the Entrepreneurs' Law).

Personnel files and contracts are also examined by the labour inspectorate, so it is worth combining the review with what I describe in the guide how to prepare for a PIP inspection. As part of a pre-inspection audit I check that these documents are complete and consistent with the data submitted to ZUS; I explain the differences between the types of audit in the text cold audit or pre-inspection audit.

The inspection report and 14 days for objections

The inspector describes the findings in an inspection report, drawn up in two copies – one is for you (Article 91(1) and (2) of the System Act).

You have 14 days from the date you receive the report to file objections; indicate the evidence in them straight away (Article 91(3)). The inspector is obliged to consider them, take additional steps if necessary and inform you in writing of how they were dealt with (Article 91(4)). You may also file objections within 14 days to an annex amending the report, unless it was drawn up as a result of considering your objections (Article 91(2a), (3) and (4a)).

If the findings show that a correction is needed, you submit the correcting documents no later than 30 days after receiving the report, the annex or the information on how the objections were dealt with (Article 41(7b)(2) and Article 47(3b)). How to read the report and structure your objections is described in the text the inspection report – what next.

What next: the ZUS decision and an appeal to the court

The inspection report is the basis for issuing a decision (Article 91(5) and Article 83 of the System Act). According to ZUS, if you do not submit corrections on time, ZUS initiates administrative proceedings and notifies you of this in writing.

A decision may be appealed to the court (Article 83(2)). You file the appeal in writing with the ZUS unit that issued the decision, within one month of its delivery (Article 477⁹ § 1 of the Code of Civil Procedure (Kodeks postępowania cywilnego)). ZUS may itself amend or revoke the decision within 30 days; otherwise, within that time limit it refers the case to the court (Article 83(6) and (7)). Cases concerning insurance coverage and contributions are heard by the regional court (sąd okręgowy) (Article 477⁸ § 1 of the Code of Civil Procedure). If the decision becomes final, you have 7 days to submit corrections (Article 41(7b)(1)).

Limitation period for contributions and sanctions

Claims for contributions become time-barred 5 years after the date on which they fell due (Article 24(4) of the System Act). However, this period is sometimes suspended – among other cases, from the date ZUS initiates proceedings to issue a decision determining the obligation to be insured, the contribution assessment basis or the obligation to pay contributions, until the date the decision becomes final (Article 24(5f)). From 8 July 2026 a further suspension was added: for the duration of an appeal against a labour inspectorate decision establishing the existence of an employment relationship (Article 24(5h)).

A fine may be imposed, among other things, for failing to pay contributions on time, failing to report required data or reporting false data, obstructing an inspection, and failing to submit declarations and reports on time (Article 98(1)(1a)–(6)).

How I can help

If the notice has already arrived, as part of a pre-inspection audit I go through the list of documents indicated in it with you, compare contracts and payroll records with what was reported to ZUS, and point out what to put in order before the inspector's visit. I can also accompany you during the inspection activities and, after the inspection, help you analyse the report and prepare objections within the statutory time limit. You will find the scope of the packages on the services page.