XTB’s Execution Shift Signals a Cost War for Forex Brokers

TL;DR: XTB is studying systematic internalizer arrangements for stock and ETF execution, a move that would let the broker fill client orders against its own inventory instead of routing to an exchange. The goal is sustaining zero-commission trading as equities grow toward a targeted 30% of total revenue. A PLN 20 million KNF fine in March keeps governance and conflict controls central to any implementation decision.

What a Systematic Internalizer Actually Does

A systematic internalizer (SI) is an investment firm that executes qualifying client orders against its own account on an organized, frequent, and substantial basis, outside of a regulated market or multilateral trading facility. Under MiFID II, this is a defined regulatory status, not a workaround. MiFIR requires SIs in shares and ETFs to publish quotes during normal trading hours, apply non-discriminatory execution rules, and document best-execution compliance at every step.

The practical effect: instead of paying exchange fees every time a client buys a stock or ETF, the broker holds inventory of liquid securities and sells directly from that book. Exchange fees, clearing costs, and third-party commissions drop out of the cost stack. The broker takes on inventory risk and a harder compliance burden in exchange.

XTB board member for trading Filip Kaczmarzyk confirmed the broker is “looking closely at systematic internaliser-type solutions,” but has not disclosed whether XTB would register as an SI itself, connect to an external SI provider, or use a hybrid structure. No implementation timeline exists yet.

The Revenue Math Forcing This Decision

XTB CEO Omar Arnaout said in February 2026 that roughly 95% of revenue still came from CFDs. His stated target is to cut that share to approximately 70% within two to three years, meaning equities, ETFs, and other products need to absorb a material revenue load that currently does not exist.

Zero-commission stock trading is the product driving that shift. XTB charges no commission on real stocks and ETFs up to EUR 100,000 (about $117,000) of monthly turnover per client. Above that threshold, a 0.2% commission with a EUR 10 minimum applies. Currency conversions carry a 0.5% margin. That fee structure works at current equity volumes. It becomes a cost problem at scale if exchange routing fees eat into margins faster than client trading volume grows.

Internalizing execution removes one layer of that cost. The economics only work if the broker can manage inventory and quote spreads tightly enough to stay inside best-execution requirements while keeping prices competitive. That is a technology and risk management problem, not just a regulatory one. For operators evaluating forex broker acquisition strategies, this shift signals that the competitive battleground for retail clients is moving from spread compression on CFDs to total cost of ownership on multi-asset platforms.

Trade Republic Already Moved, Scalable Capital Went Subscription

XTB is not the first European retail broker to rethink order routing. Trade Republic changed its execution model in July 2026, shortly after Germany’s exemption from the EU’s payment-for-order-flow (PFOF) ban expired. Trade Republic now aggregates prices from 30 exchanges and executes orders against its own account. Clients who want a specific venue — Xetra, Euronext, NYSE, Nasdaq — pay a EUR 2 fee per trade.

Scalable Capital took a different path, using a subscription tier structure to fund low-cost trading rather than restructuring order flow. Neither model is interchangeable. PFOF routes orders to a third party in exchange for payment. A systematic internalizer executes against its own book under a separate transparency and conduct framework. These are distinct business and compliance models, even though both aim at the same outcome: sustainable zero-commission or near-zero-commission trading.

The pattern across European neobrokers is consistent: the post-PFOF environment forces operators to pick a structural model rather than rely on third-party payments. XTB is now working through that same decision. A thorough acquisition cost audit of any broker’s growth plan in 2026 has to account for where execution economics land, because that determines whether a zero-commission offer is a durable growth engine or a margin drain.

The KNF Fine Changes the Governance Calculus

In March 2026, Poland’s financial regulator KNF fined XTB PLN 20 million (approximately $5.5 million). The decision concerned client onboarding procedures, target-market controls, risk disclosures, and conflicts of interest tied to a promoted-instrument list that ran from 2022 through 2023. The sanction had nothing to do with systematic internalisation or equity execution.

Kaczmarzyk pushed back on the idea that fines are a routine business cost. A penalty of any size, he said, creates reputational drag with clients, partners, and other regulators. It resurfaces in due diligence processes when XTB seeks approvals in new jurisdictions or works with institutional counterparties. XTB filed for reconsideration of the decision on April 27 and considers the penalty disproportionate.

The fine matters here because any move toward own-account execution raises exactly the conflict-of-interest questions the KNF already focused on. When a broker fills orders from its own inventory, it has a direct economic interest in the spread. Documenting price quality, maintaining non-discriminatory allocation, and auditing execution outcomes against a best-execution standard becomes a live regulatory requirement, not a checkbox exercise. XTB’s compliance infrastructure needs to be in front of that before any SI model goes live.

What This Means for Forex Operators

For operators running regulated brokerages or prop-firm structures in European jurisdictions, XTB’s exploration reveals where the industry’s structural costs are moving. Multi-asset platforms that built growth on CFD revenue are under pressure to add real-asset products to their client value proposition. The compliance and execution costs of doing that credibly are non-trivial.

From a marketing and acquisition standpoint, this shift changes which client segments brokers need to reach. A trader who wants zero-commission ETFs alongside CFD access is a different profile than a pure CFD client. Acquisition messaging, onboarding flows, and retention triggers all need to reflect that product mix. Audience segmentation for broker campaigns should already account for multi-asset intent signals, not just CFD-specific search behavior.

Brokers using paid media to drive retail client acquisition also need to watch how execution quality messaging lands. If a competitor is executing stock orders in-house with tighter spreads, that is a concrete differentiator that shows up in client experience. Campaigns that lead with zero commission need the back-end cost structure to support it, or the acquisition math breaks down as assets under management grow.

AI-driven onboarding and lead qualification are also worth examining here. A prospect comparing XTB’s zero-commission offer against Trade Republic’s EUR 2 venue-choice fee makes a decision based on trading behavior and volume. Automated lead qualification tools that surface a prospect’s expected trading frequency and asset preferences let brokers route high-value, multi-asset clients to the right conversion path faster than a generic funnel allows.

The broader signal for forex operators across Europe is structural: the regulatory and economic conditions that sustained PFOF as a revenue supplement are gone in most major EU markets. Brokers that want to grow retail equity books without raising headline fees need an execution model that actually lowers cost per trade. XTB is working through that problem publicly, and other operators are watching the outcome closely. Those looking to benchmark their own acquisition and retention performance can start with a look at how their current marketing stack is structured relative to where client acquisition costs are trending in 2026.

Status: Exploratory, Not Policy

Until XTB identifies an execution provider, defines the instrument scope, selects the jurisdictions, and sets a launch date, systematic internalisation remains an option under analysis rather than a committed direction. Kaczmarzyk gave no timetable. The broker has not confirmed whether it would register as an SI directly, use an external provider, or pursue a hybrid arrangement.

What is confirmed: XTB has no plans to reintroduce standard commissions on stock and ETF trading below the EUR 100,000 monthly threshold. The zero-commission offer stays. The question is how long the current exchange-routing cost structure can sustain that offer as the equity client base grows, and whether an SI model or a partnership with an existing SI provider closes that gap before margins compress. Operators running retail forex and multi-asset acquisition programs should treat this as an early indicator of where European broker economics are heading through 2027.

Originally reported by Finance Magnates Forex, August 2026.