How Forex Brokers Make Money, and Why the Model Matters to You

Retail forex brokers advertise commission-free trading and tight spreads, which naturally raises the question of where the money comes from.

It comes from three places, and from one structural decision about how your order is handled that matters considerably more than the fee schedule.

The three revenue streams

1. The spread. You buy at the ask and sell at the bid. That gap is the broker's most visible earning, taken on every trade you make in both directions.

2. Commission. Some accounts charge an explicit per-trade fee alongside a rawer spread. Whether this works out cheaper depends entirely on your trading size and frequency; it is a different packaging of the same cost.

3. Overnight financing markup. Holding a leveraged position past the daily rollover incurs a charge reflecting the interest rate difference between the two currencies. Brokers apply a margin to that rate, so you receive less than the interbank rate when credited and pay more when charged.

That third one is the least visible and, for positions held any length of time, frequently the largest.

Notice what all three have in common: they scale with how much you trade, not with whether you make money.

The decision that matters more: A-book or B-book

When you place an order, the broker chooses what to do with it.

A-book (agency). The broker passes your order to a liquidity provider — a bank or larger institution — and earns the spread or commission for arranging it. It has no position in the outcome. Whether you profit is irrelevant to its revenue.

B-book (dealing desk). The broker takes the other side of your trade itself. If you buy, it sells to you. Your position is its position, inverted.

The consequence is direct: under B-book, your loss is the broker's revenue.

Why B-book exists, and why most brokers use it

The honest version is not simply that brokers want clients to lose.

Retail order flow is generally small, uninformed and, in aggregate, loss-making. Passing every small trade to a liquidity provider costs money, and most such orders would net off against each other anyway. Internalising them is more efficient.

In practice most brokers run a hybrid: they identify clients who are consistently profitable and route those orders to the market, while keeping the rest internally. That is a rational commercial decision and it is legal.

But it does mean that for most retail clients, at most brokers, the firm holding your money profits when you do not.

Regulators require this to be disclosed. They have not prohibited it. Being aware of it is the client's responsibility.

The number brokers must publish

In the EU, UK and Australia, firms offering CFDs to retail clients must display the percentage of their retail accounts that lost money over the previous twelve months.

This is the single most informative thing on a broker's website. It is their own data, about their own clients, calculated by their compliance function. It sits consistently between 70% and 80%.

Read it before opening an account. It is not a marketing figure; it is a mandated disclosure the firm would rather you skipped.

What regulation actually gives you

Protection	What it does
Leverage caps	Typically 30:1 on major pairs, less on volatile instruments
Negative balance protection	You cannot lose more than your account balance
Segregated client funds	Your money held separately from the firm's own
Margin close-out rule	Positions closed automatically at a set equity level
Compensation scheme	Limited protection if the firm fails
Mandatory risk warning	The loss percentage above

Offshore brokers advertising 500:1 leverage and generous bonuses are offering exactly the absence of these protections. The higher leverage is not a better product; it is the same product without the guardrails, and without negative balance protection a gap can leave you owing money you never deposited.

How to check a broker properly

1. Find the regulator's own register — the FCA, ASIC, CySEC or your national equivalent.
2. Search by firm name on that site.
3. Confirm the website domain matches the one listed in the register.
4. Never use a registration number or link the broker gave you.

Cloned firm fraud — copying a genuine authorised firm's details and changing only the contact information — is common enough that regulators maintain public warning lists specifically for it.

Also check: are client funds segregated, is negative balance protection provided to you specifically, and what happens to your money if the firm fails.

Practical implications

• Frequency costs you and pays them. Every trade pays a spread regardless of outcome.
• Holding leveraged positions for weeks accumulates financing charges that can exceed any plausible gain.
• A tighter spread with commission is not automatically cheaper. Calculate both against your actual trade size.
• Bonuses and deposit incentives are banned for retail clients in regulated jurisdictions, because they encouraged exactly the behaviour that loses money. A broker offering one is telling you where it is regulated.

The bottom line

Brokers earn from your activity, not your success, and many earn directly from your losses. That is a structural feature of the industry rather than a scandal, and it is disclosed.

What it means practically is simple: the incentive on the other side of the screen is for you to trade more. Every decision you make about frequency and size is one where your interest and theirs point in different directions.

This article is educational and is not financial advice. Leveraged foreign exchange trading carries a high risk of loss.