Most brokers now offer commission-free trades — so the real differences worth comparing live somewhere else entirely.
A decade ago, trading commissions were one of the biggest differentiators between brokerages. That's largely no longer true — most major brokers now offer commission-free trading on stocks and ETFs, which means the meaningful differences worth comparing have shifted to other factors entirely.
Not every broker supports every account type equally well — some are strong for retirement accounts like IRAs, others focus more on general taxable brokerage accounts, and some specialize further in things like custodial accounts for minors. Starting with a clear sense of what you're actually trying to invest for (retirement, a general taxable goal, both) narrows the comparison considerably before you even start looking at specific features.
Even with commission-free stock and ETF trades standard, look closely at account maintenance fees, transfer-out fees, mutual fund transaction fees, and margin interest rates — these vary meaningfully between brokers and can matter more than trading commissions ever did.
A newer investor often benefits more from a clean, simple interface with solid educational resources than from advanced charting and options analysis tools built for active traders. Conversely, a more experienced or active trader may find a beginner-focused platform limiting. Most brokers are reasonably honest about which type of user they're built for, which makes this a fairly easy filter to apply early in your comparison.
With commissions largely off the table as a differentiator, the brokers that stand out now do so through fund selection, account flexibility, and how well the platform actually fits how you plan to invest.
Many brokers now offer a cash sweep feature, automatically moving uninvested cash into a money market fund or a partner bank account to earn interest while it sits waiting to be invested. The interest rate offered on swept cash varies meaningfully between brokers, and for an investor who tends to hold meaningful uninvested cash balances at times, this has become a genuinely relevant comparison point that didn't carry much weight a decade ago.
Come tax season, the quality and clarity of a broker's tax document generation — consolidated 1099 forms, cost basis tracking for sold investments, and integration with common tax preparation software — can meaningfully affect how smooth or frustrating tax filing turns out to be. This is a less visible feature during the excitement of opening a new account, but it's worth at least a quick check, particularly if you anticipate more complex tax situations like frequent trading or multiple account types.
Confirm a broker's account protections — most legitimate brokerages carry SIPC coverage, which protects against the brokerage's failure (not against investment losses, which SIPC explicitly doesn't cover). Beyond that baseline, customer service quality and availability vary, and it's worth checking reviews specifically about how a broker handles account issues, since this matters most exactly when something has gone wrong and you need responsive help.
Many brokers now offer a robo-advisor option alongside traditional self-directed accounts — automated portfolio management based on your risk tolerance and goals, typically for a modest annual fee as a percentage of assets managed. This can be a reasonable middle ground for investors who want diversified exposure without picking individual investments themselves, though it's worth comparing the fee against simply building a similar low-cost index fund portfolio yourself.
Most major brokers no longer require a minimum balance to open a standard account, a meaningful shift from years past when minimums could be a genuine barrier to getting started. Some specialized account types or robo-advisor services may still carry a minimum, so it's worth confirming specifically for the account type you're opening rather than assuming it doesn't apply.
If you choose a broker and later find it doesn't fit your needs, most allow an in-kind transfer of your existing investments to a new broker without needing to sell and trigger a taxable event, though transfer-out fees sometimes apply at the original broker. This makes the initial choice lower-stakes than it might feel — a reasonable starting choice, refined later if needed, beats over-researching to the point of delaying getting started at all.
With commission-free trading now standard across most major brokers, the meaningful differences have shifted to account flexibility, fund selection, fee structure beyond trading commissions, and platform fit for your specific experience level. None of these differences are usually large enough to justify extensive delay in choosing — a reasonable, well-matched choice now is generally better than continued research before actually starting to invest.