What is the difference between a brokerage and a prop firm?

A brokerage holds client money and executes client orders in the market, earning from spreads, commissions or market-making. That is a licensed, capital-intensive, regulated activity. A prop firm sells an evaluation, funds successful traders with its own capital, and pays out a share of simulated performance. It does not hold client funds or route client orders, which is why it typically sits outside broker licensing and can launch in weeks rather than a year.

How much capital do you need to start a brokerage?

Far more than a prop firm, and the exact figure depends on jurisdiction. Regulators impose minimum capital requirements on licensed brokers, and on top of that you need operating capital, liquidity provider deposits and technology costs. Well-regulated jurisdictions require substantially more capital than offshore ones, but an offshore licence limits which clients you can serve and which payment providers will work with you.

What is the difference between A-book and B-book?

A-book means passing client orders through to a liquidity provider, so the broker earns from spread or commission and has no directional exposure to client outcomes. B-book means taking the other side internally, so the broker profits when clients lose, which creates an obvious conflict of interest and real risk if clients win. Most brokers run a hybrid, routing profitable or larger clients to A-book and internalising the rest.

Should I build a brokerage or a prop firm?

If your goal is to monetise trading demand quickly and with limited capital, the prop firm model is dramatically cheaper, faster and less regulated to launch. A brokerage makes sense if you specifically want recurring revenue from client trading volume, have the capital for licensing and liquidity, and can wait six to eighteen months for approval.

How to Build a Trading Brokerage (and Whether You Should)

Building a brokerage and building a prop firm get discussed as if they were variations on the same idea. They are fundamentally different businesses with different capital requirements, regulatory exposure and timelines. Many people researching brokerages actually want the prop firm model, so this page covers both honestly.

The core difference

A brokerage holds client money and executes client orders in the market. It earns from spreads, commissions, or from taking the other side of client trades. Because it handles client funds, it is a licensed and regulated activity in essentially every serious jurisdiction.

A prop firm sells an evaluation, funds traders who pass with its own capital, and pays out a share of simulated performance. It does not hold client deposits as trading capital and does not route client orders. That is why it typically sits outside broker licensing — see prop firm regulation — and why it can launch in weeks.

What building a brokerage requires

A licence. The central requirement and the longest pole. Well-regulated jurisdictions mean higher capital requirements and longer approval, but broader market access and better payment relationships. Offshore licences are faster and cheaper, but restrict who you can serve and which processors will work with you.
Regulatory capital. Minimum capital is set by the regulator, and it sits on top of operating capital and liquidity provider deposits.
Liquidity provision. Prime broker or liquidity provider relationships, which require their own due diligence and deposits.
Technology. Trading platform, bridge, risk management, client portal, back office.
Client money handling. Segregated accounts, reconciliation, audit — an ongoing compliance function, not a setup task.
Compliance staffing. Licensed brokers generally need named, qualified compliance personnel.

Realistically: six to eighteen months, and capital requirements an order of magnitude above a prop firm.

A-book, B-book and the hybrid reality

A-book passes orders to a liquidity provider. The broker earns spread or commission and has no directional exposure to whether clients win. Lower margin, lower risk, no conflict of interest.

B-book takes the other side internally. The broker profits when clients lose. Higher margin, but genuine risk when clients win, and an obvious conflict of interest that regulators scrutinise.

Hybrid is what most brokers actually run: route consistently profitable or larger clients to A-book, internalise the rest. This requires real-time client classification and risk management — the operationally hardest part of running a brokerage. More detail in brokerage models explained.

The honest comparison

Against the same goal — monetising retail trading demand:

Time to launch. Brokerage: 6-18 months. Prop firm: weeks. See realistic timelines.
Capital. Brokerage: regulatory minimums plus liquidity deposits. Prop firm: materially less.
Regulatory load. Brokerage: licensed, audited, ongoing compliance staffing. Prop firm: significant obligations, but typically no broker licence.
Revenue model. Brokerage: recurring, driven by client volume. Prop firm: evaluation fees, with repeat purchases.
Main risk. Brokerage: regulatory and market exposure. Prop firm: payout liability and acquisition cost.

Build a brokerage if you want recurring revenue from trading volume, have the capital and patience for licensing, and intend to operate a regulated financial business long term.

Build a prop firm if you want to monetise the same demand quickly, with far less capital, and without a licensing runway. For most people asking this question, this is the answer — which is why the prop model grew so fast.

Frequently asked questions

Brokerage vs prop firm?

A brokerage holds client money and executes client orders under a licence. A prop firm sells evaluations and funds traders with its own capital, so it typically needs no broker licence.

How much capital for a brokerage?

Jurisdiction-dependent regulatory minimums, plus operating capital and liquidity deposits — well above prop firm requirements.

A-book or B-book?

A-book passes orders through; B-book takes the other side. Most brokers run a hybrid with real-time client classification.

Which should I build?

Prop firm for speed and low capital; brokerage for recurring volume-based revenue if you can fund and wait for licensing.

If the prop model fits better

PropFirmsTech builds the complete prop firm stack — platform, risk engine, payments, KYC and dashboards — launchable in 14 days. Start with how to start a prop trading firm, the platform, or white-label solutions.

Book a call and we will help you work out which model actually fits your goals and capital.