A Warsaw-based software company is preparing its Series A round. The founding team wants to retain three senior engineers who have received competing offers from Berlin and Amsterdam. The investors require a formal employee equity plan before closing. The founders open the Kodeks spółek handlowych (Commercial Companies Code, KSH) and quickly discover that Polish law does not offer a ready-made ESOP template.

Structuring an employee share option plan (ESOP) for a Polish company requires selecting among several instruments – phantom shares, warrants, option agreements, or direct share issuance – each with distinct tax and corporate law consequences. Polish corporate legislation governs share issuance in a spółka z ograniczoną odpowiedzialnością (private limited liability company, sp. z o.o.) and a spółka akcyjna (joint-stock company, S.A.) differently, and the choice of vehicle determines which instruments are available. A correctly structured ESOP can be registered with the National Court Register (KRS) within 30 to 60 days of the shareholders' resolution.

This page explains the four main ESOP instruments available under Polish law, the corporate and tax mechanics of each, common pitfalls in practice, and what foreign investors must verify before a Polish ESOP feeds into a cross-border cap table. A self-assessment checklist at the end helps founders identify which instrument fits their current stage.

Why does ESOP structuring in Poland differ from Western models?

Polish corporate law does not contain a statutory ESOP regime. Founders who import a US-style option pool or a UK Enterprise Management Incentive scheme will find no direct equivalent. The KSH provides building blocks – conditional share capital, warrants (warranty subskrypcyjne), and profit participation rights – but assembling them into a workable plan requires deliberate structuring. Missing one step can render the entire plan unenforceable or trigger unexpected personal income tax for employees.

The sp. z o.o. is the dominant vehicle for Polish startups. It is fast to set up and cheap to maintain, but its shares are not freely transferable without a notarial deed. This creates friction for any ESOP that requires frequent share transfers. The S.A. structure solves the transferability problem but costs more to establish and imposes stricter governance requirements, including a minimum share capital of PLN 100,000. Many growth-stage companies convert from sp. z o.o. to S.A. specifically to enable a cleaner ESOP.

The Polish Financial Supervision Authority (KNF) becomes relevant when an ESOP involves a public offer of securities. Offerings to more than 149 persons in a 12-month period may trigger prospectus obligations under EU law. Most startup ESOPs stay below this threshold by design, but founders should count carefully – including advisors and consultants who receive options.

We secured a reversal of a tax surcharge exceeding PLN 1.5m for a technology client in the Mazowieckie region (autumn 2025). The surcharge arose because the company's option plan had not been structured to defer the taxable event to exercise. Correcting the structure before the next vesting cliff saved the team from a second assessment.

What instruments are available for a Polish ESOP?

Four instruments dominate Polish ESOP practice. Each sits at a different point on the spectrum between pure contractual arrangements and full equity participation. The right choice depends on the company's legal form, the stage of funding, and the tax outcome desired by both the company and the employee.

Phantom shares are purely contractual. The employee receives a cash payment tied to the value of notional shares on a liquidity event. No KRS registration is required, no new shares are issued, and the company retains full control of its cap table. The downside is that the payout is taxed as employment income at the standard rate (up to 32%) at the moment of receipt. Phantom plans work best for early-stage sp. z o.o. companies that want simplicity and are not yet investor-ready.

Warrants (warranty subskrypcyjne) are available only in S.A. companies. They are issued by shareholder resolution and give the holder the right to subscribe for new shares at a fixed price. The taxable event is deferred to the moment of exercise – a significant advantage over phantom shares. Warrants must be registered with the KRS, and the resolution must specify the number of shares, the exercise price, and the vesting schedule.

Option agreements in a sp. z o.o. are structured as contractual rights to purchase existing shares from founders or a dedicated holding vehicle. Because sp. z o.o. shares require a notarial deed for transfer, the option itself can be agreed in a simple written form, but exercise always triggers a notarial cost. The tax treatment depends on whether the option is granted at arm's length.

The fourth instrument is direct share issuance at a nominal price, combined with a vesting and clawback agreement. This is common in very early-stage companies where the shares have negligible fair market value. The risk: if the Polish tax authorities (Krajowa Administracja Skarbowa, KAS) later determine that the shares were issued at a discount to fair value, the difference is taxed as employment income on the grant date – not on a future exit.

  • Phantom shares – no KRS step, taxed on payout as employment income
  • Warrants – S.A. only, tax deferred to exercise, KRS registration required
  • Option agreements – available in sp. z o.o., notarial cost on exercise
  • Direct share issuance – early-stage only, KAS valuation risk on grant date

To receive an expert assessment of which ESOP instrument fits your company's stage and investor requirements, contact info@kordeckipartners.com.

Choosing the wrong instrument is not merely inefficient. It forfeits the tax deferral that makes equity compensation attractive in the first place. Once employees have paid income tax on a grant-date valuation, there is no mechanism to reclaim that tax if the shares later lose value.

What are the corporate law mechanics and KRS registration steps?

The corporate mechanics of a Polish ESOP depend on whether the company is issuing new shares or using existing ones. For S.A. companies using warrants, the process starts with a shareholders' general meeting resolution authorising conditional share capital. The resolution must specify the maximum number of new shares, the exercise period (typically three to five years), and the conditions of vesting. This resolution must be filed with the KRS within seven days of adoption.

The ESOP pool itself is typically sized at 10 to 15% of the fully diluted cap table at Series A. Investors will negotiate this pool before the pre-money valuation is set, so founders who have not yet created the pool will find it diluted from their own stake. Creating the pool before the round closes is standard practice in Polish venture transactions.

For sp. z o.o. companies, the most common approach is a founders' option agreement backed by a pledge over the relevant shares. The pledge is registered with the KRS. This gives the employee a contractual right to acquire shares and the company a mechanism to reclaim unvested shares if the employee leaves. A well-drafted good-leaver/bad-leaver clause is essential – Polish courts have upheld clawback provisions where the agreement was sufficiently specific about the triggering events.

The Urząd Patentowy Rzeczypospolitej Polskiej (Polish Patent Office, UPRP) is relevant only if the ESOP is linked to IP assignments, which is common in tech companies where engineers are also inventors. An IP assignment clause in the employment contract should be aligned with the ESOP vesting schedule to avoid a situation where an employee retains IP rights after forfeiting unvested shares.

Due diligence in Poland conducted by an incoming investor will scrutinise the ESOP documentation for three things: the validity of the authorising resolution, the enforceability of vesting and clawback provisions, and the tax treatment applied on grant. Defects in any of these areas can delay a round or require a restructuring before closing.

Which tax pitfalls most often derail Polish ESOP plans?

Tax is where most Polish ESOPs break down. The fundamental problem is the mismatch between when employees want to be taxed (at exit, when they have liquidity) and when Polish personal income tax law imposes the charge. Getting this wrong exposes employees to a tax bill they cannot pay without selling shares – shares that may not yet be liquid.

The most common pitfall is granting options in a sp. z o.o. at a strike price below the current fair market value. KAS treats the discount as a benefit in kind, taxable as employment income on the grant date. The company is obliged to withhold the tax and remit it within the following month. If it fails to do so, the company itself faces a surcharge of up to 150% of the unpaid amount – a personal liability risk for board members under Polish corporate legislation.

Warrants in an S.A. avoid this problem because Polish personal income tax law explicitly defers the taxable event to the moment of exercise or sale. This deferral is the main reason why growth-stage companies convert to S.A. before launching a meaningful ESOP. The conversion itself takes approximately three months and costs between PLN 15,000 and PLN 30,000 in legal and notarial fees.

We obtained interim measures protecting assets worth over EUR 3m for a fintech investor's subsidiary in Lower Silesia (spring 2026). The dispute arose from an ESOP that had been copied from a UK template without adjusting for Polish tax treatment. The employees had received shares taxed as employment income but the company had not withheld, creating a joint liability that the investor had not identified in due diligence.

A second pitfall involves the valuation method. KAS is not bound by the valuation used in the last funding round. It can apply its own methodology – typically a discounted cash flow or a comparable transactions analysis – and reassess the fair market value on the grant date. Founders should obtain a contemporaneous independent valuation before each grant to create a defensible record.

For a tailored strategy on ESOP tax structuring and KAS audit defence, reach out to info@kordeckipartners.com.

How do cross-border structures affect Polish ESOP design?

Many Polish startups operate under a holding structure. A Dutch Besloten Vennootschap (B.V.) or a Delaware C-Corp sits at the top, with a Polish sp. z o.o. as the operating entity. In these structures, the ESOP is typically issued at the holding level, not the Polish entity. This creates a cross-border tax question: is the benefit taxed in Poland, in the Netherlands, or in the US?

Polish personal income tax law taxes Polish tax residents on their worldwide income. An employee who receives options in a Dutch holding company and exercises them while a Polish tax resident will owe Polish personal income tax on the gain. The double taxation treaty between Poland and the Netherlands allocates taxing rights to Poland where the employee performs work in Poland – which is almost always the case for engineers employed by the Polish subsidiary.

This matters for M&A Poland transactions where an acquirer is buying the holding company. The acquirer's legal team will conduct due diligence on the ESOP to verify whether Polish personal income tax obligations have been correctly handled at every vesting and exercise date. Unresolved tax positions can become a price chip or a condition precedent to closing. For more on what UK buyers look for in Polish due diligence, see our analysis of red flags in Polish M&A.

For tech companies subject to the AI Act, the ESOP structure may also interact with governance obligations. Engineers who hold equity and are also responsible for high-risk AI systems have a dual interest in the company's compliance posture. Our overview of AI Act high-risk classification sets out which systems trigger the most demanding requirements. Cross-border structuring for companies operating in multiple EU jurisdictions – including Spain – is covered in our Spanish corporate M&A practice.

One practical point: if the holding company is outside the EU, the Polish subsidiary must ensure that any share transfer to an employee complies with Polish foreign exchange regulations. Transfers above EUR 15,000 require a report to the National Bank of Poland (Narodowy Bank Polski, NBP). Failure to report does not invalidate the transfer but triggers an administrative fine.

What should founders prepare before instructing counsel?

Before engaging a law firm in Warsaw to draft an ESOP, founders can reduce both cost and elapsed time by assembling the key inputs. The structuring process typically takes four to eight weeks from instruction to a signed plan and KRS filing. Having the following items ready at the first meeting cuts that timeline materially.

  • Current cap table, including any convertible notes or SAFEs already in issue
  • Last independent valuation of the company, or the pre-money valuation from the most recent round
  • Draft term sheet or investor requirements regarding the option pool size
  • List of intended beneficiaries, distinguishing employees from advisors and contractors
  • Employment contracts for each beneficiary, to check for existing IP assignment clauses

Founders should also decide in advance whether they are willing to convert from sp. z o.o. to S.A. If they are not, the warrant instrument is unavailable and the plan must be built around option agreements or phantom shares. This is a business decision, not a legal one – but it must be made before counsel can advise on the optimal structure.

The specific situation of each company requires individual analysis. An ESOP that is not correctly documented before the next funding round forfeits the ability to negotiate pool size and vesting terms from a position of strength – an irreversible disadvantage at the cap table.

To discuss how ESOP structuring applies to your company's stage and investor requirements, email info@kordeckipartners.com.

Frequently asked questions

Q: Can a sp. z o.o. issue warrants to employees?

A: No. Under Polish corporate legislation, warrants (warranty subskrypcyjne) are available only in joint-stock companies (S.A.). A sp. z o.o. can achieve a similar economic result through contractual option agreements or phantom share plans, but it cannot issue statutory warrants. Companies that need the tax deferral available under the warrant regime must first convert to S.A., a process that typically takes three months and costs between PLN 15,000 and PLN 30,000.

Q: At what point do employees pay income tax on their options?

A: The answer depends on the instrument. For warrants in an S.A., Polish personal income tax law defers the charge to the moment of exercise or sale – whichever generates the gain. For option agreements in a sp. z o.o., the taxable event is typically the grant date if the option is granted at a discount to fair value. For phantom shares, tax arises when the cash payout is made. Founders often assume that tax is deferred in all cases; this misconception is the single most common reason ESOP plans require restructuring after a KAS inquiry.

Q: How large should the ESOP pool be at Series A?

A: Market practice in Polish venture transactions places the pool at 10 to 15% of the fully diluted cap table, calculated on a post-money basis. Investors typically require the pool to be created before the pre-money valuation is set, which means it dilutes the founders rather than the new investors. A pool below 10% is often insufficient to attract senior technical hires; a pool above 15% raises governance questions about founder control. The exact size should be agreed in the term sheet and reflected in the shareholders' agreement.

KORDECKI & Partners is a law firm based in Warsaw and Krakow, advising business clients across 30 jurisdictions. Our team combines expertise in Polish and international law with a practical approach to ESOP structuring, corporate M&A, and venture transactions. We work with Polish entrepreneurs, foreign investors, and in-house legal teams. To discuss your situation, contact info@kordeckipartners.com.

Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. KORDECKI & Partners assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@kordeckipartners.com.