XTB vs DEGIRO vs Interactive Brokers — Deep 2026 Broker Comparison for Polish Investors

Choosing a broker is a decision that compounds over decades. A 0.5% difference in annual fees on a 500,000 PLN portfolio means 2,500 PLN per year — or over 50,000 PLN across a 20-year investment horizon when you factor in lost compounding. This guide compares the three most popular brokers among Polish investors in 2026, covering every cost that matters and every feature that differentiates them.

Quick Answer: XTB is the best choice for most Polish investors — zero commission on stocks/ETFs under EUR 100,000/month, IKE account support, a polished Polish-language platform, and automatic PIT-8C tax reporting. DEGIRO offers the cheapest access to European exchanges and a simple interface but lacks IKE/IKZE. Interactive Brokers is the most powerful platform with the lowest costs for large portfolios and advanced traders, but has a steeper learning curve and no IKE/IKZE.

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Broker Profiles

XTB

XTB (X-Trade Brokers) is a Polish-listed company (GPW: XTB) regulated by the KNF (Polish Financial Supervision Authority). Founded in 2002, it has grown into one of Europe's largest retail brokers with over 1 million clients. XTB is the only broker of the three that is both headquartered in Poland and regulated by the KNF.

DEGIRO

DEGIRO is a Dutch broker acquired by flatexDEGIRO in 2020, regulated by the AFM (Netherlands) and BaFin (Germany). It gained popularity by offering ultra-low commission rates across European markets. DEGIRO serves Polish clients through its EU passport.

Interactive Brokers (IBKR)

Interactive Brokers is an American brokerage giant founded in 1978, publicly traded on NASDAQ (IBKR). It serves clients in 200+ countries and provides access to 150+ markets. For Polish clients, IBKR operates through its Irish entity (IBIE), regulated by the Central Bank of Ireland.

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Commission and Fee Comparison

Stock and ETF Trading Fees

Over the EUR 100k/month limit at XTB: 0.2% commission applies. This only affects very active traders.

Currency Conversion (FX) Fees

This is often the hidden cost that matters most. If you earn PLN and buy US stocks denominated in USD, you pay an FX fee on every conversion.

Key insight: Interactive Brokers' FX fee is almost negligible — 0.002% means converting 50,000 PLN costs approximately 4 PLN. At XTB, the same conversion costs 250 PLN (0.5%). At DEGIRO, approximately 125 PLN (0.25%). Over a year of regular investing, this difference can be substantial.

Annual/Account Fees

Dividend Processing

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IKE and IKZE Support

IKE (Indywidualne Konto Emerytalne) and IKZE (Indywidualne Konto Zabezpieczenia Emerytalnego) are Poland's tax-advantaged retirement accounts — similar to IRAs in the US. They are a critical consideration for Polish investors.

This is XTB's strongest competitive advantage. Polish investors who want to buy ETFs like VWCE, CSPX, or MSCI World within an IKE wrapper — avoiding 19% capital gains tax upon retirement — can only do so at XTB among these three brokers. Other Polish brokers offering IKE include mBank (Bossa), PKO BP, and BOŚ, but XTB's zero-commission model makes it the most cost-effective.

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Available Markets and Instruments

For passive ETF investors: All three provide access to the core ETFs (VWCE, CSPX, IWDA, EUNL). XTB's selection is smaller but covers the essentials. DEGIRO and IBKR offer much wider ETF selection, including niche thematic and emerging market ETFs.

For active traders: Interactive Brokers is in a different league — options chains, futures, forex, algorithmic trading via API, and access to virtually every liquid market on earth.

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Platform and Mobile App Comparison

XTB — xStation 5

• Design: Modern, clean, Polish-first interface
• Mobile app: Excellent (one of the highest-rated broker apps in Poland)
• Features: Watchlists, charts (basic technical analysis), news feed, market calendar
• Order types: Market, limit, stop-loss, take-profit
• Limitations: No advanced charting tools (no custom indicators), no API for algorithmic trading
• Language: Polish (default), English, and 10+ other languages

DEGIRO — WebTrader

• Design: Minimalist, functional, no frills
• Mobile app: Good (clean, fast, but fewer features than XTB)
• Features: Basic charts, watchlists, price alerts
• Order types: Market, limit, stop-limit, trailing stop (on some markets)
• Limitations: No real charting or technical analysis, no research tools
• Language: Polish available, English, Dutch, German, and others

Interactive Brokers — Trader Workstation (TWS) / Client Portal / IBKR Mobile

• Design: TWS is powerful but visually dated; Client Portal is modern and web-based; Mobile app is comprehensive
• Mobile app: Very good (most features available on mobile)
• Features: Advanced charting (100+ indicators, drawing tools), options chain analysis, portfolio analytics, risk management tools, news from multiple sources, fundamental data
• Order types: Every type imaginable — market, limit, stop, trailing, bracket, algorithmic (VWAP, TWAP), conditional
• API: Full API access for algorithmic trading (Python, Java, C++)
• Language: Polish available, 20+ languages

Verdict on platforms: XTB wins for beginners and casual investors who want a polished, simple experience. IBKR wins for advanced traders who need professional-grade tools. DEGIRO is adequate but uninspiring.

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Account Opening Process

XTB's advantage: Fastest onboarding. Polish ID verification is seamless. Fund via bank transfer or even Revolut. Account typically active within 24 hours.

IBKR's friction: The application asks detailed questions about trading experience, net worth, and investment objectives. Some users report being asked for additional documentation. The thoroughness reflects IBKR's regulatory approach but can frustrate beginners.

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Tax Reporting for Polish Investors

This is where the choice of broker has significant practical implications for your annual tax return.

XTB's biggest practical advantage for average investors: The automatic PIT-8C form. XTB calculates all your capital gains, losses, dividend income, and FX effects, then sends the PIT-8C directly to the Polish tax office. Your investment data appears pre-filled in e-PIT. Filing PIT-38 takes minutes.

DEGIRO and IBKR users must manually calculate: You download the annual statement, identify every buy/sell transaction, calculate gains/losses in PLN (including FX conversion effects using NBP exchange rates on transaction dates), and fill in PIT-38 yourself. This is tedious and error-prone. Many users hire a tax advisor or use dedicated tax calculation tools.

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Security and Investor Protection

Important note on DEGIRO: By default, DEGIRO opens "Basic" accounts that allow them to lend your securities. This introduces counterparty risk. You can choose a "Custody" account that prevents lending, but it comes with higher fees (e.g., no free ETF trades). Some investors consider this an important distinction.

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Fractional Shares

Fractional shares matter for investors who want to invest fixed amounts regularly (e.g., 500 PLN/month into VWCE regardless of share price). Without fractional shares, you may have uninvested cash sitting idle if the share price exceeds your investment amount.

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Cost Comparison: Real Scenarios

Scenario 1: Passive Investor — 2,000 PLN/Month into VWCE

Annual investment: 24,000 PLN (~5,500 EUR)

XTB's IKE account is transformative for long-term passive investors. Even though XTB's FX fee is the highest, the tax-free status of IKE gains far outweighs any commission differences.

Scenario 2: Active Trader — 50 Trades/Month, US Stocks

Average trade size: 5,000 PLN

For active traders, Interactive Brokers' near-zero FX costs dominate the equation. The platform is also superior for execution quality and order types.

Scenario 3: Large Portfolio — 500,000 PLN, Buy-and-Hold

Holding: VWCE + CSPX + Polish treasury bonds ETF

For large buy-and-hold portfolios, the inactivity fee at XTB is a consideration — though making a single small trade per year avoids it. IBKR is ideal for large portfolios due to multi-currency holding and negligible FX costs.

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Which Broker for Which Investor?

Choose XTB If:

• You want an IKE account for tax-free retirement investing
• You are a beginner or intermediate investor who values simplicity
• You prefer Polish-language support and KNF regulation
• You invest primarily in mainstream ETFs and stocks
• You want automatic PIT-8C tax reporting
• You invest regularly in amounts under EUR 100k/month

Choose DEGIRO If:

• You want access to a wider range of European ETFs and exchanges
• You are comfortable with manual tax reporting
• You do not need IKE/IKZE
• You are a cost-conscious investor focused on European markets
• You prefer a simple, no-frills platform

Choose Interactive Brokers If:

• You have a large portfolio (100,000+ PLN) where FX costs matter
• You are an active trader who needs advanced tools and order types
• You want access to options, futures, bonds, or global markets
• You are comfortable with a complex platform and manual tax reporting
• You plan to hold multiple currencies and invest globally
• You want API access for automated trading strategies

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Tracking Your Broker Alongside Other Accounts

Polish investors often use XTB for IKE, a second broker for taxable accounts, plus a bank for savings and Revolut for daily spending. Keeping track of total portfolio value, asset allocation, and progress toward financial goals across these scattered accounts is a challenge.

Freenance connects to XTB and other financial accounts, pulling all positions, balances, and transactions into a single dashboard. Some investors find this useful for maintaining a holistic view of their financial health — seeing how their brokerage holdings fit alongside emergency savings, retirement accounts, and real estate in their overall net worth picture.

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Frequently Asked Questions

Can I transfer my portfolio from one broker to another?

Yes, but the process varies. XTB supports outbound transfers for free. DEGIRO charges 20 EUR per position for outbound transfers. IBKR supports ACATS transfers (mainly for US brokerages) and FOP transfers for free. Note that IKE accounts at XTB can only be transferred to another IKE provider — not to a regular brokerage account.

Do I pay double tax on US dividends?

Not if the W-8BEN form is in place. With W-8BEN, US dividends are subject to 15% US withholding tax. Poland's 19% dividend tax rate means you owe an additional 4% to Poland (19% - 15% credit = 4%). Without W-8BEN, the US withholds 30%, and you can still claim credit in Poland, but the net cost is higher.

Is XTB safe? What if XTB goes bankrupt?

XTB is regulated by the KNF, publicly traded on GPW, and subject to EU investor protection rules. Client assets are segregated from company assets. In the event of insolvency, the KDPW compensation scheme covers up to EUR 20,100. That said, your securities are held in your name at KDPW (the Polish central securities depository), so they would be returned to you regardless — the compensation scheme covers cash and securities that cannot be returned.

Why does FX cost matter so much?

Because most Polish investors earn PLN but buy USD or EUR-denominated ETFs. Every purchase and every dividend involves a currency conversion. At XTB's 0.5% FX fee, investing 50,000 PLN/year in VWCE costs 250 PLN just in FX — every year. Over 20 years with IBKR's 0.002% rate, you save roughly 5,000 PLN on FX alone, before considering compounding.

Can I have accounts at multiple brokers?

Yes, and many investors do. A common setup: XTB for IKE (tax-free retirement), IBKR for taxable global investing (lowest FX costs), and a Polish bank's brokerage for Polish treasury bonds. The downside is more complex tax reporting (multiple PIT-38 entries) and more accounts to manage.

Does DEGIRO or IBKR plan to offer IKE/IKZE?

As of April 2026, neither broker has announced plans to offer IKE or IKZE accounts. Offering these requires specific KNF authorization and Polish custody arrangements. It remains a possibility but there is no indication it will happen soon.

What is the best broker for Polish treasury bonds (EDO, TOS, COI)?

None of these three. Polish treasury bonds are bought directly through the Ministry of Finance website (obligacjeskarbowe.pl) or through PKO BP. XTB, DEGIRO, and IBKR do not provide access to the primary market for Polish retail treasury bonds.

How do I report DEGIRO or IBKR income on my Polish tax return?

You download the annual statement from your broker, identify each realized gain/loss, convert amounts to PLN using the NBP exchange rate on the settlement date, calculate net capital gains, and enter the total on PIT-38. For dividends, you report gross dividend income and claim credit for foreign withholding tax. Many investors use spreadsheet templates or hire a tax advisor (typically 200–500 PLN for this service).

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The Bottom Line

For most Polish investors building long-term wealth through passive ETF investing, XTB with an IKE account is the clear winner — zero commissions, automatic tax reporting, and tax-free gains at retirement create a combination no foreign broker can match in Poland.

For advanced traders and large-portfolio investors who need the lowest possible FX costs and access to global markets, Interactive Brokers is unmatched — but requires comfort with a complex platform and manual Polish tax reporting.

DEGIRO occupies a middle ground that has narrowed in 2026 — XTB's zero-commission model has eroded DEGIRO's cost advantage, and IBKR's elimination of account minimums has undercut DEGIRO's accessibility argument. DEGIRO remains viable for investors specifically focused on European exchanges with broad ETF selection.