Debtor Registries in Poland: Complete Guide 2026

What is a debtor registry in Poland - and why should you care?

If you do business in Poland and a client stops paying, you have more leverage than you might think. Poland operates a network of private debtor information bureaus (Polish: Biuro Informacji Gospodarczej, or BIG) - centralised databases that record overdue commercial and consumer debts. Being listed on one of these registries has real, immediate consequences for your debtor: their access to trade credit, leasing, utilities, and even mobile phone contracts can be blocked overnight.

This guide explains exactly how Poland's three main debtor registries work, who can use them, what the minimum thresholds are, how to file a report, and - crucially - how Terminovo's automated escalation path does the heavy lifting for you before you ever need to submit a formal entry.

One note before we begin: if you issue invoices through KSeF - Poland's mandatory national e-invoicing system (mandatory from 1 February 2026 for large companies and from 1 April 2026 for most SMEs and sole traders) - your invoices already carry the status of an official government-timestamped document. That matters enormously when you're asserting a debt: the debtor cannot dispute the invoice date, the amount, or the fact of delivery.

Poland's three main debtor registries

There are four licensed BIG bureaus operating in Poland under the Act on Sharing Business Information (Ustawa o udostępnianiu informacji gospodarczych). Three dominate the market and are the ones you will encounter in practice.

1. BIG InfoMonitor (Biuro Informacji Gospodarczej InfoMonitor S.A.)

The largest and most widely used registry in Poland, operated by the BIK Group (the same organisation that runs Poland's personal credit bureau). BIG InfoMonitor holds data on both businesses (B2B) and consumers (B2C). It is the default choice for most lenders, telecoms, and utilities when they screen a new customer, which means a listing here carries the broadest market reach.

BIG InfoMonitor also integrates with BIK (Biuro Informacji Kredytowej), Poland's bank credit information bureau, which means that a business debt report can surface during a debtor's banking applications - an extremely powerful deterrent.

2. KRD BIG SA (Krajowy Rejestr Długów Biuro Informacji Gospodarczej SA)

The National Debt Register - probably the most recognisable name among Polish consumers, thanks to years of advertising. KRD focuses heavily on B2B receivables and consumer debts. It runs a large public consumer awareness campaign ("Check your debtor before you deal") and provides an API used by thousands of Polish companies to screen clients and counterparties in real time.

KRD entries are particularly effective for motivating payment from sole traders and small businesses, since many Polish SMEs check KRD before entering into contracts or granting payment terms.

3. ERIF BIG SA

The youngest of the three major registries, ERIF specialises in consumer receivables - utility companies, telecoms, and landlords use it most. For pure B2B collections, ERIF is less commonly used than BIG InfoMonitor or KRD, but it remains a fully licensed bureau and some creditors report to all three simultaneously to maximise visibility.

Registry comparison at a glance

Feature	BIG InfoMonitor	KRD BIG SA	ERIF BIG SA
Founded	2003	2003	2005
Primary focus	B2B + B2C, lending, utilities	B2B + B2C, trade credit	B2C, utilities, telecoms
Integration with BIK (bank credit bureau)	Yes	No	No
Minimum B2B debt threshold	500 PLN	500 PLN	500 PLN
Minimum B2C debt threshold	200 PLN	200 PLN	200 PLN
Minimum days overdue to report	30 days	30 days	30 days
Who can report	Any registered business (membership required)	Any registered business (membership required)	Any registered business (membership required)
Consumer-facing visibility	Very high (BIK cross-check)	High (well-known brand)	Medium
Typical use case	SME B2B + consumer	SME B2B + trade credit	Consumer receivables

Minimum thresholds: when can you report a debtor?

The Polish BIG Act sets clear, uniform conditions that apply to all three registries. You can submit a debtor report only when all of the following are true:

• Minimum amount owed: PLN 500 for B2B (business debts), PLN 200 (~EUR 46) for B2C (consumer debts)
• Overdue by at least 30 days from the original payment deadline on the invoice or contract
• You have sent a written notice (demand letter) to the debtor informing them that you intend to list them in a BIG registry, and at least 30 days have passed since that notice was sent without payment
• The debt is undisputed - or, if disputed, a court or arbitration panel has confirmed it

The 30-day prior notice rule is critical and often overlooked. You cannot simply submit a report the moment an invoice is overdue. Polish law requires you to formally warn the debtor - in writing, with proof of delivery - and give them a final 30-day window to pay before you register the entry.

This is not a loophole; it is by design. The system is intended to motivate payment, not to punish. In practice, the demand letter itself - warning of imminent BIG registration - resolves a significant proportion of long-overdue debts without any actual filing.

Who can report a debtor to a Polish registry?

Any company legally registered in Poland can become a member of BIG InfoMonitor, KRD, or ERIF and gain the right to submit debtor reports. Membership requires signing a contract with the bureau and paying an annual or monthly fee (typically PLN 200–600 per year depending on the registry and your reporting volume).

Foreign companies with a branch or registered entity in Poland can also become members. If you are an international business invoicing Polish clients through a Polish entity, you have access to the same tools as any domestic creditor.

Individuals (consumers) can also report debts owed to them by businesses in some circumstances, but the process is more complex and less commonly used.

What happens when a debtor is listed?

The consequences of a BIG registry entry are practical and immediate. Any company or individual that checks the debtor's profile - before signing a contract, granting payment terms, offering a loan, or activating a utility service - will see the outstanding entry.

In concrete terms, a registered debtor may find it difficult or impossible to:

• Open a business bank account or obtain a credit line
• Lease office space, machinery, or vehicles
• Sign a mobile phone contract or business broadband agreement
• Win new clients who screen suppliers through KRD or BIG InfoMonitor
• Obtain trade credit from suppliers (30- or 60-day payment terms)
• Pass background checks run by public procurement authorities

For a functioning business, these consequences are severe. This is why the threat of registration - delivered via a formal demand letter - is often more powerful than the registration itself. Many debtors pay in full within days of receiving a BIG warning notice.

How to actually report a debtor: step by step

The process is the same across all three major registries:

1. Become a member - Sign a service agreement with your chosen registry (or registries). You will need your company's NIP (tax identification number), KRS or CEIDG registration details, and a designated company representative.
2. Send a written demand letter - Formally notify the debtor by letter (recommended: registered post with proof of delivery) that you hold an overdue debt and intend to register it in a BIG bureau within 30 days unless payment is made. The letter must state the name of the bureau(s) you intend to use.
3. Wait 30 days - This is mandatory. You cannot submit the report before this window closes.
4. Submit the debtor report online - Log in to the registry's web portal and enter the debtor's details: NIP (for businesses) or PESEL (for consumers), the invoice number, outstanding amount, original due date, and proof of the demand letter dispatch.
5. Monitor the entry - The registry lists the entry. The debtor and any party checking their profile will see it. When the debt is paid, you are legally obliged to remove the entry within 14 days of receiving payment.

How Terminovo's escalation path leads to BIG filing

Reporting a debtor to a BIG registry is a tool of last resort in an effective payment recovery process - not a first step. Terminovo is built around this principle: try every amicable channel first, escalate systematically, and only reach for the formal legal instruments when earlier stages have failed.

Here is how Terminovo's escalation path works in practice:

Stage 1: Automated payment reminders (days 1–14 after due date)

Terminovo sends your client a series of automated reminders by email and SMS. The tone starts friendly and becomes progressively firmer. Each reminder includes the invoice number, amount, due date, and a direct payment link. Approximately 65–70% of overdue invoices are resolved at this stage - clients who simply forgot or who were waiting for a nudge. Cost: PLN 1 per reminder sent.

Stage 2: Firm follow-up with a payment link (days 14–30)

If the reminder sequence does not produce payment, Terminovo escalates to a firmer message that explicitly notes the invoice is significantly overdue and that further steps are being considered. This is still entirely amicable - no legal language - but the tone signals that the creditor is paying attention. A further 15–20% of cases resolve here.

Stage 3: Formal demand letter (days 30–60)

Terminovo generates a professionally formatted demand letter (Polish: wezwanie do zapłaty) in PDF format. This letter includes all legally relevant information: parties, invoice references, total amount due including statutory interest, and a final payment deadline. Critically, it warns the debtor that failure to pay will result in their entry in a BIG debtor registry. You download the letter and send it by registered post. This stage resolves a further 10% of cases.

Stage 4: BIG registry filing

If 30 days have elapsed since the demand letter was sent with no payment, you now meet all the legal conditions to submit a debtor report. At this stage, Terminovo guides you through the report submission process and helps you compile the documentation required by the registry: invoice copies, the demand letter with proof of posting, and the debtor's identifying information.

For most creditors, even reaching Stage 4 is rare. The combination of automated reminders and a formal BIG-warning demand letter resolves the vast majority of overdue accounts without any formal registry submission.

Statutory interest on overdue invoices in Poland

While you are working through the escalation process, your debt is growing. Polish law entitles B2B creditors to statutory interest on overdue commercial invoices at a rate set by the Minister of Finance. As of early 2026, the statutory interest rate for commercial transactions is 15.75% per year (NBP reference rate 5.75% + 10 percentage points). You are entitled to start charging this interest from the day after the payment deadline - no additional contractual clause is required.

You are also entitled to a fixed recovery fee per overdue invoice: EUR 40 (approximately PLN 170) for debts under EUR 1,000, EUR 70 (approximately PLN 295) for debts between EUR 1,000 and EUR 10,000, and EUR 100 (approximately PLN 420) for debts above EUR 10,000. These amounts are set by EU Directive 2011/7/EU and apply automatically under Polish law.

Always include the statutory interest and recovery fee in your demand letter. It demonstrates professionalism, increases the total amount at stake for the debtor, and is entirely your legal right.

BIG registry vs. court proceedings vs. debt sale: a quick comparison

Recovery method	Speed	Cost	Effort	Preserves client relationship?
Automated reminders (Terminovo)	Days	PLN 1/reminder	Very low (automated)	Yes
Demand letter	30–60 days	Postal costs only	Low	Mostly yes
BIG registry entry	Immediate effect	Registry membership (PLN 200–600/yr)	Medium (one-time setup)	No (adversarial)
Court (payment order - nakaz zapłaty)	3–12 months	5% of debt value in court fees	High (lawyer recommended)	No
Debt sale (factoring)	Immediate cash	15–30% of invoice value lost	Low	No

For most SMEs, the optimal sequence is: reminders → demand letter → BIG filing → court - in that order, stopping as soon as payment is received. Terminovo automates the first two stages and prepares the documentation for the third.

Practical considerations for international businesses in Poland

If you are an English-speaking business owner, expat, or international company invoicing Polish clients, there are a few additional points worth understanding:

• Language: Demand letters and BIG registry communications are in Polish. Your debtor is a Polish entity, so all formal correspondence must be in Polish to be legally unambiguous. Terminovo generates demand letters in Polish by default.
• KSeF compliance: From April 2026, if your Polish entity issues B2B VAT invoices above the 10,000 PLN monthly threshold, those invoices must go through KSeF. A KSeF-issued invoice is stronger evidence in any payment dispute - the government timestamp proves the invoice was issued and received on a specific date, removing any "I never got the invoice" defence.
• NIP vs. PESEL: To report a business debtor, you need their NIP (Polish tax identification number). This is standard information on any Polish invoice. To report an individual consumer, you need their PESEL (national identity number) - more difficult to obtain in practice.
• Currency: All BIG thresholds and reporting are in PLN. If you invoice in EUR, the PLN equivalent at the time the debt falls due determines whether you meet the 500 PLN B2B threshold.

Frequently asked questions

How long does a BIG entry stay on the registry?

Entries remain active for up to 10 years from the date the debt became overdue, or until you remove the entry after receiving payment. You are legally required to request removal within 14 days of the debt being settled. Failure to do so can result in liability for any damage caused to the former debtor.

Can a debtor dispute a BIG registry entry?

Yes. The debtor can submit a formal objection to the registry, and the registry will mark the entry as "disputed." However, the entry remains visible. To have an entry removed on grounds of dispute, the debtor typically needs a court decision declaring the debt invalid or an agreement with the creditor. If your debt is based on a KSeF-issued invoice, the debtor's ability to dispute the underlying claim is significantly weaker.

Does reporting a debtor affect my relationship with them?

Almost certainly, yes - and permanently. BIG registration is an adversarial step. Use it only after exhausting amicable channels. The good news is that if you follow Terminovo's escalation path properly, you will have made multiple documented attempts to resolve the matter before reaching this stage, which both maximises your recovery rate amicably and protects you legally if the matter ever goes to court.

What if the debt is below 500 PLN?

You cannot use BIG registries for B2B debts below 500 PLN (~EUR 114). For small debts, your practical options are: continued manual contact, statutory interest accumulation (keep a record), or - if the matter involves a pattern of small underpayments - addressing it contractually with that client going forward.

Can I report a debtor in multiple registries simultaneously?

Yes. Some creditors report to both BIG InfoMonitor and KRD at the same time, maximising visibility. You need separate memberships with each registry. The additional administrative overhead is modest, and for significant debts the wider reach can make a difference.

Is it legal to threaten BIG registration in a demand letter?

Yes - provided you are genuinely entitled to file the report (i.e., the debt meets the thresholds and the 30-day waiting period applies). Threatening BIG registration is a standard, legally recognised practice. What is not permitted is using the threat as leverage for a debt you know to be disputed or unenforceable - that would constitute improper pressure.

How does Terminovo help with BIG filings?

Terminovo is not a BIG registry - you file directly with BIG InfoMonitor, KRD, or ERIF. What Terminovo does is: (1) automate reminders so most debts resolve before this stage; (2) generate the legally correct demand letter that starts your mandatory 30-day notice clock; (3) maintain a complete audit trail of all contact attempts, which you will need if you proceed to a BIG filing or court action. See Terminovo's plans - free to start.

Key takeaways

• Poland has three major debtor registries: BIG InfoMonitor (largest, linked to BIK), KRD BIG SA (most recognised brand), and ERIF BIG SA (consumer-focused).
• You can report a B2B debtor once the debt exceeds 500 PLN (~EUR 114), is overdue by at least 30 days, and you have sent a formal written notice 30 days in advance.
• The threat of BIG registration - via a properly worded demand letter - resolves many overdue accounts without any actual filing.
• KSeF-issued invoices provide an unassailable evidentiary foundation for any debt claim or BIG filing.
• Terminovo's escalation path - automated reminders, firm follow-up, demand letter, BIG guidance - gives you a structured, documented process that maximises your recovery rate at every stage before formal registry submission.
• BIG entries remain visible for up to 10 years and have real, immediate consequences for the debtor's ability to conduct business.

Ready to stop chasing late payments manually? Start with Terminovo for free - free KSeF e-invoicing included, automated payment reminders from PLN 49/month.