Skip to main content
Choosing a Broker

Platform Features Checklist

Pomegra Learn

Platform Features Checklist

A broker with great marketing and a sleek app is useless if it doesn't support the basic features your investment plan requires. Before opening an account, verify that the platform can handle your specific situation: the account types you need, the order types you'll use, whether fractional shares work with your dollar-cost averaging plan, and how the platform delivers tax documents.

Key takeaways​

  • Verify account types first: Roth IRA, Traditional IRA, HSA, 529, SEP-IRA, Solo 401(k), or others your situation requires. Not all brokers support all account types.
  • Fractional shares should be automatic and free. If a broker charges per fractional purchase or limits it to certain funds, move on.
  • Recurring purchases (automatic monthly buys) are essential for dollar-cost averaging. Confirm that recurring orders work with your planned purchases (e.g., specific ETFs, not just mutual funds).
  • Tax form delivery matters: confirm the broker provides Form 1099-B (brokerage statements) electronically and in a timeline that works for your tax preparer or filing deadline.
  • Order types vary; for index investors, market orders (standard) and limit orders (useful for ETFs) are sufficient. Options investors need more variety.

Account types: the foundational feature​

The first question to ask a broker is simple: "Do you support a Roth IRA?" And if you need more than one account type: "Do you support Roth IRA, Traditional IRA, HSA, and 529?" A "no" to any of these is a dealbreaker if that account is part of your plan.

Roth IRA and Traditional IRA: Nearly every broker supports these. Fidelity, Schwab, E*TRADE, TD Ameritrade, Vanguard, Interactive Brokers, and Merrill Edge all have them. No minimum balance is typical. Confirmation: easy.

Health Savings Account (HSA): This is where the first gap appears. Many banks restrict HSA investments to money-market or stable-value funds, earning near-zero interest. A few brokers allow self-directed HSAs where you can buy stocks and ETFs. Fidelity and Schwab both support self-directed HSAs; many smaller brokers don't. If you want to invest HSA money (a powerful retirement-savings vehicle), verify your broker supports it.

529 education savings plans: Some brokers allow you to open custodial 529s; others don't. Vanguard and Fidelity have 529 programs. If you're planning to save for a child's education in a 529, confirm the broker is a 529 custodian.

SEP-IRA and Solo 401(k): If you're self-employed or a freelancer, you might open a SEP-IRA (simplified employee pension) or Solo 401(k) for retirement savings. Fidelity and Schwab both support these. E*TRADE and TD Ameritrade also do. Smaller brokers sometimes don't.

Custodial accounts (UTMA/UGMA): If you're saving for a minor, you might open a custodial account. The broker holds assets on behalf of the child. Most brokers support these, but confirm.

Joint accounts: If you're married and want to own investments jointly, all major brokers support joint accounts. Confirm that the platform allows easy tracking of basis for tax purposes if you later divorce or need to separate the account.

Fractional shares and dollar-cost averaging​

Dollar-cost averaging—investing a fixed dollar amount (e.g., $500/month) into diversified assets—requires fractional shares. If you have $500 and you want to buy VTI ($150/share in late 2024), you need to buy 3.33 shares, not round down to 3.

Fidelity, Schwab, and E*TRADE: All support automatic fractional shares at no fee. You can set up a recurring $500/month purchase of VTI and the system will buy exactly $500 of VTI each month, even if it's not a whole number of shares.

Vanguard: Vanguard supports fractional shares but historically discouraged them in favor of their own mutual funds. In 2023, Vanguard improved fractional share support, but it's not as seamless as Fidelity. Confirm current policy.

Interactive Brokers: Supports fractional shares but charges a small commission per trade. For frequent small purchases, this adds up.

Neo-brokers (Robinhood, Public, Webull): Excellent fractional share support. Fractional shares are their main competitive advantage for small accounts.

Red flag: If a broker offers fractional shares only for certain funds (e.g., Vanguard mutual funds but not iShares ETFs), you'll be limited in fund choice. This is a real constraint.

Recurring purchases and automation​

If your plan is to invest $500 every month into a three-fund portfolio (60% VTI, 30% VXUS, 10% BND), you need recurring purchase automation. Here's how to verify it:

  1. Open the broker's platform (demo or live account).
  2. Find the recurring purchase or "automatic investment" feature.
  3. Set up a test: schedule $100/month to buy VTI. Verify the system accepts the order.
  4. Confirm the order frequency options: weekly, bi-weekly, monthly, quarterly.
  5. Verify the order processes correctly (check your first purchase goes through).

All major brokers support this. Fidelity calls it "automatic investment" and allows daily, weekly, bi-weekly, monthly, or quarterly purchases. Schwab calls it "recurring orders" and has the same options. E*TRADE, TD Ameritrade, and Vanguard all support recurring purchases.

Neo-brokers support recurring purchases, though some restrict it to certain securities.

One caveat: Some brokers' recurring-purchase features are clunky if you want to split a single deposit across multiple funds. For example, if you want to invest $500/month split as $300 to VTI and $200 to VXUS, some platforms require you to set up two separate recurring orders (one for VTI, one for VXUS). Fidelity and Schwab handle this cleanly; check your broker's specific process.

Order types​

For a pure index investor (stocks, ETFs, mutual funds), you'll only use two order types:

Market order: Buy or sell at the best current price. For liquid ETFs like VTI, the market price is effectively the NBBO (national best bid and offer), so market orders are fine and execute instantly.

Limit order: Specify a price; the order fills only if the market reaches that price. Useful for illiquid ETFs or if you want to avoid buying at a temporary spike. For VTI, a limit order is probably unnecessary because the spread is pennies, but it's a good habit for less-liquid securities.

All major brokers support both. No issues here.

If you venture into bonds, covered calls, or options, you'll need more sophisticated order types (conditional orders, trailing stops, spreads). For now, confirm the broker offers market and limit orders.

Tax forms and documentation​

At tax time, the broker must deliver Form 1099-B (brokerage statements), Form 1099-INT (interest earned), Form 1099-DIV (dividend income), and potentially Form 8949 (detailed gain/loss information). How and when you get these matters.

Electronic delivery: Confirm the broker delivers tax forms electronically (PDF, accessible through your account). Avoid brokers that mail paper forms only; you'll be scrambling near April 15.

Timing: Most brokers deliver 1099-B by January 31. Some are slower and don't deliver until February. If you file your taxes in early February, this matters. Confirm deadlines.

Cost basis tracking: When you sell a security, the broker must track your cost basis (what you paid for it) and calculate the gain or loss. This is automatic, but confirmation is useful. Ask: "Does the platform track cost basis and auto-fill Form 8949, or will I calculate it manually?"

Fidelity, Schwab, E*TRADE, and Vanguard all have excellent tax-form delivery and cost basis tracking. No issues here.

Mobile app quality​

A great mobile app keeps you engaged and out of trouble. A terrible app makes you contemplate abandoning your plan to avoid opening it. Here's what to look for:

Essential features:

  • View account balance and holdings.
  • View stock/ETF prices and charts.
  • Place orders (buy and sell).
  • Set up recurring purchases.
  • Deposit money.

Nice-to-have features:

  • View cost basis and realized/unrealized gains.
  • Research tools (company fundamentals, analyst ratings, news).
  • Alerts (price alerts, dividend alerts, rebalancing reminders).
  • Tax information and reporting.

Red flag - gamification: Some apps (Robinhood, Webull, Moomoo) feature celebration pop-ups when you make a profitable trade, badges for streaks of successful picks, leaderboards comparing your performance to other users, and notifications that encourage frequent trading. These are deliberately designed to mimic slot-machine mechanics and drive engagement (and churn). Avoid them if you want a boring, profitable portfolio.

All major discount brokers (Fidelity, Schwab, E*TRADE) have solid, neutral apps that let you check your balance and place orders without psychological tricks.

Research tools and market data​

Not essential for index investors, but useful to verify:

  • Screeners: Can you filter stocks by dividend yield, P/E ratio, or other metrics? (You don't need this if you're buying VTI, but it's nice to have.)
  • Fundamental data: Can you see company financials, earnings, cash flow? (All major brokers provide this.)
  • Third-party research: Does the broker offer Morningstar, S&P, or Bloomberg research? (Often bundled at no extra cost.)
  • Options analysis: If you trade options, does the broker provide tools to analyze payoff diagrams, volatility surfaces, or implied move? (Advanced traders care; most index investors don't.)

Fidelity and Schwab bundle excellent research tools at no cost. Interactive Brokers requires a paid tier for premium research.

Account minimums and fees​

Confirm:

  • Minimum to open an account: Most major brokers allow $0 minimum. Some (especially in the full-service category) require $10,000–$25,000. Confirm.
  • Minimum per trade: Confirm there's no minimum per order. If a broker says "minimum $500 per purchase," it's a blocker for small recurring buys.
  • Inactivity fees: Some brokers charge if you don't trade for a year. Avoid these.
  • IRA account fees: Some brokers charge annual IRA maintenance fees ($25–$100). Fidelity, Schwab, and E*TRADE don't. Confirm.
  • Wire-transfer fees: If you move money in or out, confirm wire-transfer costs. Most brokers charge $0 for ACH transfers (3–5 days) and $25–$35 for wire transfers (1 day).

Transfer and portability​

If you ever want to move your accounts to another broker, confirm:

  • ACAT (Automated Customer Account Transfer) support: Most brokers support this standard for moving securities account-to-account. Confirm the broker facilitates ACAT transfers.
  • Cost: Some brokers charge $25–$50 per account transferred; others charge nothing. Fidelity and Schwab charge nothing if you're transferring into them.
  • In-kind transfers: Can you move securities directly (without selling and re-buying), or does the broker require liquidation? In-kind transfers avoid tax events. All major brokers support in-kind ACAT transfers.

Practical verification process​

Before opening a real account, test the platform:

  1. Visit the broker's website. Look for an "open account" or "demo account" link.
  2. Verify account types. Does the broker offer each account type you need? (Roth, Traditional, HSA, 529, etc.)
  3. Confirm fund selection. Search for the specific funds you plan to buy (VTI, VXUS, BND). Verify commission is zero and shares are fractional.
  4. Test recurring purchases. In the demo or through customer service, confirm you can set up recurring monthly purchases.
  5. Check tax forms. Ask customer service: "When do you deliver 1099-B forms, and in what format?"
  6. Download or view the app. If mobile trading matters to you, download the app and spend 5 minutes navigating it. Is it intuitive? Does it feel like a slot machine or a ledger?

Final checklist: a concrete example​

Here's a concrete example of a feature-verification checklist for a new investor opening a first account at Fidelity:

  • Account types: Roth IRA ✓, HSA (self-directed) ✓, taxable brokerage ✓
  • Funds: VTI (zero commission, fractional shares) ✓, VXUS ✓, BND ✓
  • Recurring purchases: $500/month split across three funds ✓
  • Tax forms: 1099-B delivered by January 31, electronically ✓
  • Mobile app: Clean, minimal interface, no gamification ✓
  • Research tools: Morningstar data included ✓
  • Account minimum: $0 ✓
  • IRA fees: None ✓
  • ACAT transfers: Free transfers in ✓

Fidelity passes all checks. Account opened. Money invested. Done.

Next​

With a broker selected and platform features verified, the next article dives into a less-discussed but equally important factor: mobile app design and how it shapes your behavior. A slot-machine app keeps you trading too often; a boring app keeps you on track.

Flowchart: Platform Features Verification​