Opening a brokerage account is often reduced to a single question: which one has zero commissions? But commission is only one piece of what determines whether a brokerage fits your needs. This guide lays out the framework for evaluating any brokerage before you fund an account.
Start With Account Protection
Before funding any account, confirm the brokerage is a member of the Securities Investor Protection Corporation (SIPC). SIPC protects customers if a brokerage fails and securities or cash go missing, covering up to $500,000 total, including a $250,000 limit for cash. It is important to understand what SIPC does not cover: it does not protect against a decline in the market value of your investments. See our full breakdown of how SIPC protection works for the details.
Understand How "Free" Trading Actually Works
Many brokerages advertise commission-free trading, which raises a fair question: how do they make money? Common answers include payment for order flow, interest earned on uninvested cash balances, margin lending interest, and premium subscription features. None of these are inherently problematic, but understanding them helps you evaluate a brokerage's incentives. See our explanation of how commission-free brokers make money for more detail.
Choose the Right Account Type
Brokerages generally offer two core account structures:
| Account Type | How It Works | Key Risk |
|---|---|---|
| Cash account | You pay in full for securities purchased | Limited to funds actually deposited |
| Margin account | You can borrow against holdings to buy more | Leverage magnifies losses; margin calls possible |
A margin account is not inherently better or worse — it depends on your experience level and risk tolerance. See our comparison of cash vs. margin accounts before choosing.
Evaluate the Platform, Not Just the Price
A brokerage's trading platform, charting tools, order types, research resources, and mobile app reliability all affect your day-to-day experience. A platform that fits a long-term buy-and-hold investor may not suit someone who trades more actively. See our guide to evaluating a broker's platform and tools for what to compare.
Look Past the Commission to Execution Quality
Even with zero commissions, the price at which your order actually fills — known as execution quality — can affect your real cost, particularly for active traders or larger orders. Regulators require brokerages to disclose order routing and execution statistics. See order execution quality explained for how to interpret this.
How to Approach Any Brokerage's Offer
Rather than naming one brokerage as universally "best" — an assessment that would need constant updating as fee structures and platform features change — we focus on criteria that hold up over time: verified SIPC membership, transparent revenue practices, an account structure that matches your risk tolerance, and a platform suited to how you actually plan to invest.
Common Mistakes to Avoid
- Choosing a brokerage based on commission alone without checking SIPC membership.
- Opening a margin account without understanding margin call risk.
- Assuming "commission-free" means there are no costs at all.
- Overlooking platform and research tools that matter for your specific investing style.
Conclusion
Evaluating a brokerage means looking past the headline commission structure to account protection, account type, platform fit, and execution quality. Use the companion guides below to go deeper on SIPC protection, account types, and execution quality.