Forex brokers earn revenue primarily through spread markup — the gap between buy and sell prices — and, for ECN brokers, per-trade commissions. Overnight financing (swap) charges and inactivity fees are secondary income streams. Market makers profit from internalised client losses; ECN/STP brokers earn from volume. Payment for order flow (PFOF) is restricted by the FCA in the UK under MiFID II-equivalent best-execution rules.
How Do Forex Brokers Make Money on the Spread?
The spread is the primary revenue mechanism for most retail forex brokers. When a broker quotes EUR/USD at a bid of 1.08500 and an ask of 1.08510, the one-pip gap is the broker's gross margin on every standard lot transacted. For a spread-only account, every trade entry immediately costs the client the spread — and that revenue accrues to the broker. On a standard lot of EUR/USD, a one-pip spread is worth approximately USD 10, so a broker processing substantial daily retail volume at a one-pip spread generates significant gross spread revenue.
Spread markup is how market makers at IG Markets, CMC Markets and most retail CFD providers generate their core income. The broker receives a tighter wholesale price from its liquidity providers and quotes a slightly wider retail price to clients — the difference is the markup. The Financial Conduct Authority's MiFID II-equivalent best-execution rules require brokers to demonstrate that the price delivered is competitive for the client's order type and size, but these obligations do not eliminate spread markup; they set a minimum competitiveness floor. Traders should always read the current pricing page for the specific account type and instrument they intend to use.
ECN Commissions: How Non-Dealing-Desk Brokers Are Paid
An Electronic Communications Network (ECN) or Straight-Through Processing (STP) broker does not internalise client trades. Instead it routes orders directly to a pool of external liquidity providers — banks, other brokers, institutional participants — and charges a per-lot commission each way. Pepperstone's Razor account is an example widely cited in FCA broker comparisons: it quotes near-raw interbank spreads on EUR/USD and charges a commission per standard lot per side. IC Markets' Raw Spread account and Interactive Brokers' tiered pricing model operate on the same principle.
The commission model aligns broker and client interests more closely than the market-maker model: an ECN broker earns from volume and frequency of trading, not from the direction of client trade outcomes. For high-frequency traders or those placing large sizes, the commission model can produce a lower all-in cost despite the additional fee. For infrequent traders placing smaller positions, the commission may outweigh the spread saving. The FCA requires brokers to disclose all applicable fees — including per-lot commissions — in the Key Information Document provided under MiFID II-equivalent PRIIPs regulations before account opening.
Swap Fees: How Overnight Financing Generates Broker Revenue
Every leveraged CFD position held past the broker's daily cut-off — typically 22:00 UK time — incurs an overnight financing charge known as a swap or rollover. The swap reflects the cost of the implicit borrowing in a leveraged position, adjusted for the interest-rate differential between the two currencies in the pair. For brokers, swap income is a meaningful secondary revenue stream, particularly when client books carry net directional positions held overnight or across several days.
Swap rates are published in each broker's contract specifications and vary by instrument, direction (long vs short) and the prevailing central-bank rate environment. The FCA's transparency requirements — reinforced by MiFID II-equivalent best-execution obligations and Consumer Duty rules in force since July 2023 — require brokers to clearly disclose all financing costs before a client opens a position. Traders holding positions across multiple days at IG Markets, CMC Markets or Pepperstone should compute the cumulative swap cost, which can exceed the entry spread over a five-day hold and becomes the dominant cost component for multi-week positions.
Market Maker vs ECN/STP: Where the Conflict of Interest Sits
In a market-maker model, the broker internalises the other side of client trades: when a retail client buys EUR/USD, the broker takes the short position. If the client's position loses value, the broker's internalised position gains — and the broker profits directly from the client's loss. This structural conflict of interest is legal and widespread in retail FX; it does not mean the broker manipulates prices, but it does mean a direct financial incentive against client profitability exists. FCA-regulated market makers must still meet best-execution obligations, Consumer Duty standards and the ESMA 30:1 leverage cap — none of these eliminate the conflict, but they set conduct standards around it.
An ECN or STP broker routes the trade externally and charges a commission; revenue does not depend on the direction of client outcomes. This removes the direct profit-from-client-loss incentive, though it does not eliminate all conflicts — brokers may still select liquidity providers or internalise a subset of flow. Payment for order flow (PFOF) — where brokers receive rebates from market makers for routing client orders to them — was restricted by the FCA in 2021 under MiFID II best-execution reforms. OANDA, AvaTrade and Saxo Bank each use hybrid execution models; reviewing each broker's KID and execution policy discloses how order flow is handled for your specific account type.
Frequently asked questions
How do forex brokers make money on spreads?
A broker quotes a wider spread to retail clients than the wholesale interbank price it receives from liquidity providers — the difference is the spread markup and is the broker's gross margin on every trade. For a spread-only account at a market maker, this is the primary and often only explicit trading cost. It applies on every entry and exit, making it the most visible broker revenue source.
What is payment for order flow (PFOF) and why is it restricted in the UK?
Payment for order flow is a practice where a broker receives rebates from a market maker or liquidity provider in exchange for routing client orders to that venue. The FCA restricted PFOF in 2021 under MiFID II best-execution reforms because it creates an incentive to route orders for the broker's benefit rather than to achieve the best outcome for the client. UK-regulated brokers must demonstrate best execution on client orders.
Do market makers profit when traders lose?
In a pure market-maker model, yes: the broker takes the other side of client trades internally, so client losses generate broker gains on those internalised positions. This conflict of interest is legal under FCA rules but must be disclosed. FCA-regulated market makers are still required to meet best-execution obligations, Consumer Duty standards and the ESMA 30:1 leverage cap, which constrain how the conflict is managed.
How do ECN and STP brokers make money?
ECN and STP brokers route client orders to external liquidity providers and charge a per-lot commission each way rather than internalising the trade. Their revenue depends on trading volume, not the direction of client outcomes — which removes the direct profit-from-client-loss incentive present in market-maker models. Pepperstone's Razor account and IC Markets' Raw Spread account are commonly cited examples of commission-based ECN/STP models.
Are swap fees a significant broker revenue source?
Yes. Overnight financing (swap) charges are a meaningful secondary revenue stream for brokers, particularly when client books carry net directional positions held for multiple days. Swap rates are published in each broker's contract specifications and vary by instrument, direction and the prevailing central-bank rate differential. For traders, swap costs can exceed the entry spread over a five-day hold, making them the dominant cost for swing or position traders.
Sources & further reading
Pipex is Spreadwise's disclosed AI research agent: it computes the all-in round-trip — spread, commission and swap — before rating any ESMA-regulated forex or CFD broker, and cross-checks every regulatory claim against the CySEC, FCA or BaFin public register. No star rating is issued before the numbers are verified. Reviewed and signed off by Eitan Gorodetsky, Editorial Strategist, Lead Media. How Pipex works →