Interactive Brokers is the cost benchmark every other day trading broker gets measured against, and it earns that position with published numbers: $0.005 per share fixed, margin from 5.12% on the first $100,000, and zero platform fees on software most brokers would charge for. The catch is that nothing here is plug-and-play; IBKR itself labels Trader Workstation an intermediate-to-advanced platform, and you’ll assemble your own market data from a menu before you trade your first gapper.
Our rating: 4.5 / 5
Best for: cost-focused active traders who want institutional-grade routing, low margin rates, and multi-asset access, and who will invest a week in setup.
NOT for: traders who want a broker that works out of the box, or dedicated small-cap short sellers who should compare locate desks at direct-access brokers before deciding.
Price: $0 account minimum. IBKR Pro: $0.005 per share fixed ($1 minimum per order) or tiered from $0.0035 per share ($0.35 minimum). IBKR Lite: $0 commissions on US exchange-listed stocks and ETFs.
Pros:
- Pro fixed pricing is $0.005 per share with no platform fees
- Margin starts at 5.12% and drops above $100,000
Cons:
- Consolidated real-time quotes and depth data are paid subscriptions
- IBKR rates its own flagship platform intermediate to advanced
This review is part of our full broker rankings for day traders. Every number below was verified against the official Interactive Brokers pricing and policy pages in June 2026.
What is Interactive Brokers
Interactive Brokers LLC, usually shortened to IBKR, is a US brokerage that has been in business for more than 40 years and, by its own published figures, serves over 5 million client accounts with consolidated equity capital above $21.3 billion. It’s a public company; financials are posted on its investor relations pages. The pitch has never changed: minimize cost, maximize market access. Clients trade stocks, options, futures, currencies, bonds, and more across 170+ markets from one account.
For day traders specifically, that global breadth is mostly beside the point. What matters is the US stock execution stack, the cost structure, and how fast you can act on it. That’s what the rest of this review covers.
Pro or Lite: pick the right plan first
Everything at IBKR forks at one decision: IBKR Pro or IBKR Lite.
IBKR Lite gives US residents unlimited $0 commissions on US exchange-listed stocks and ETFs, with no account minimum and no inactivity fees. The trade-off is stated on the plan page itself: Lite orders are routed to select market makers, and IBKR receives payment for order flow on them. Lite accounts also pay a higher margin rate (6.12% on USD balances at the June 2026 benchmark) and don’t get IB SmartRouting for US-listed securities. One more documented wrinkle: Lite reserves the right to reject orders that look like non-retail trading behavior and re-offer them at Fixed pricing, and trades placed during overnight sessions or in OTC names bill at the Fixed schedule.
IBKR Pro charges commissions and, in exchange, routes through IB SmartRouting, which searches exchanges and dark pools for the best available price. Pro margin rates run a full point cheaper than Lite at every tier.
The decision writes itself. If you’re day trading with size and frequency, the routing and the margin rate are worth more than free commissions; take Pro. Lite is for the buy-and-hold side of your money, not the trading side.
Commissions and fees
All figures below were checked against the official commission schedule in June 2026. US stocks, ETFs, and warrants:
| IBKR Pro Fixed | IBKR Pro Tiered | IBKR Lite | |
|---|---|---|---|
| Per share | $0.005 | $0.0035 (first 300,000 shares/month, falling to $0.0005 at the highest volumes) | $0 on US exchange-listed stocks and ETFs |
| Minimum per order | $1.00 | $0.35 | None |
| Maximum per order | 1% of trade value | 1% of trade value | n/a |
| Third-party fees | Regulatory fees only | Exchange, clearing, regulatory, and pass-through fees added | Regulatory fees on sells |
| Routing | SmartRouting and direct routing | SmartRouting and direct routing | Select market makers (payment for order flow, disclosed) |
| Who can use it | Anyone | Anyone | US residents only |
Run the numbers on a realistic month. Say you place 10 orders a day at 500 shares each, 21 trading days, about 105,000 shares a month:
- Fixed: 500 × $0.005 = $2.50 per order. That’s $25 a day, roughly $525 a month, all-in except small regulatory fees. Predictable.
- Tiered: 500 × $0.0035 = $1.75 per order, about $367.50 a month before venue fees and rebates. Whether tiered actually beats fixed depends on how you trade: passive limit orders that add liquidity can collect rebates, while marketable orders that remove liquidity pay venue fees on top. IBKR’s own schedule warns that liquidity-removing fees on stocks under $2.50 can be substantial, and that it doesn’t pass every rebate through. If you chase low-priced movers with market orders, fixed is usually the safer bet; if you sit on the bid in liquid names, tiered can win.
Worth knowing on top: options run $0.65 per contract or less under standard Pro pricing with no exercise or assignment fee, telephone orders to close a position cost $30 each, and incoming or outgoing ACATS transfers are free per the fee schedule.
Market data: the line item nobody budgets for
This is where IBKR differs most from retail brokers, and where new accounts get confused. Per the market data pricing page, every account gets free real-time streaming quotes on US-listed stocks and ETFs, but they come from Cboe One and IEX only. That’s non-consolidated data: it does not show the National Best Bid and Offer. For a long-term investor, fine. For a day trader working entries to the penny, not fine.
The consolidated NBBO feeds are cheap but not free for non-professional subscribers: NYSE (Network A) at $1.50 a month, NYSE American/ARCA/BATS/IEX (Network B) at $1.50, and NASDAQ (Network C) at $1.50. That’s $4.50 a month for true top-of-book across US listings. Add NASDAQ TotalView-OpenView for full depth of book at $16.50 a month and your day trading data stack runs about $21 a month, and the TotalView fee is waived in any month you generate more than $20 in commissions. Subscriptions aren’t pro-rated, you need at least $500 of equity in the account to subscribe, and exchanges classify anyone registered in the industry as a professional at much higher rates.
Now the limit that actually bites momentum traders, straight from the same page: the number of symbols you can watch in Level 2 depth windows simultaneously is tied to your market data allocation. The default allocation of 100 data lines allows depth on exactly three unique symbols at once. The allocation grows with your commissions (divided by 8) or your equity ($100 per $1 million), and you can buy Quote Booster packs at $30 a month for one extra simultaneous depth symbol each, capped at ten packs. If your morning routine is flipping Level 2 across a rotating watchlist of six gappers, you’ll either close windows constantly or pay for boosters. On a $30,000 account doing $300 a month in commissions, you’d sit at 100 lines and three depth symbols. That constraint shows up nowhere in the marketing and everywhere in practice.
Execution and routing
IBKR’s case for Pro rests on routing. SmartRouting searches exchanges and dark pools for the best available price on stocks, options, and combinations; traders who want control can route directly to a specific venue instead, with the per-venue fee schedules published openly. The order toolkit is deep: Trader Workstation carries more than 100 order types and algos, including brackets, One Cancels Other, profit takers, stop limits, and execution algos, per the TWS platform page.
What we won’t do is claim a fill-speed verdict from hands-on testing, because we don’t fabricate testing. What the documents support: this is one of the few brokers at any account size that publishes its routing logic, lets you bypass it, and itemizes the venue economics underneath. That transparency is the substance behind the “professional’s broker” reputation.
Short selling and locates
Shorting at IBKR works on a borrow-fee model. Per the short sale cost page, your daily cost is the borrow fee on the shares minus any interest paid on short sale proceeds, and on hard-to-borrow names the net rebate can go negative fast; borrow rates float with supply and demand in the securities lending market. Proceeds interest is 0% on the first $100,000, so smaller accounts wear the full borrow fee. Availability is searchable in real time through the Short Securities Availability tool, and a pre-borrow (reserving shares ahead of the trade) carries a $20 ticket fee per the fee schedule.
The honest framing: IBKR documents the mechanics more transparently than almost anyone, but if your entire edge is shorting low-float runners, locates are your core supplier relationship, not a side feature. Compare what a dedicated shorting broker offers before committing; our CenterPoint Securities review covers the large-account end of that market, and our explainer on how short locates work covers the mechanics.
Margin rates and the new intraday rules
Margin is where IBKR is genuinely hard to beat. June 2026 USD rates from the official margin page: Pro accounts pay a blended 5.12% on the first $100,000 borrowed (benchmark + 1.5%), 4.62% on the next tier, falling to 4.12% at institutional size. Lite pays a flat 6.12%. A Pro trader carrying a $50,000 margin loan pays about $2,560 a year, roughly $7 a day; at brokers charging double-digit rates, the same loan can cost twice that. If you use leverage at all, this line item alone can dwarf commission differences.
On the rules side, the ground shifted in 2026. FINRA eliminated the pattern day trader framework, including the $25,000 minimum equity requirement and the trade-counting designation, and replaced it with risk-based intraday margin requirements effective June 4, 2026, per FINRA Regulatory Notice 26-10. Under the new regime you must hold adequate maintenance margin throughout the trading day relative to your actual positions, and repeated failures to cover intraday deficits can get an account restricted for up to 90 days, per FINRA’s investor guidance. One transition detail matters: firms have until October 20, 2027 to migrate, and may run the old day trading margin rules in the meantime, so confirm with the broker how your specific account is being handled before you assume the old limits are gone. The full mechanics are in our guide to the intraday margin requirements that replaced the PDT rule.
Platforms
No platform fees on any of these, per the platforms page. IBKR’s own skill labels are in parentheses, and they’re refreshingly honest:
- Trader Workstation (intermediate to advanced). The flagship desktop platform. Mosaic mode snaps trading, charting, order management, scanners, and news into one configurable workspace; Classic mode offers quick-click order entry from the bid and ask with direct access to the full order-type library. Watchlists, customizable market scanners, real-time alerts on price, time, margin, and volume, and the Risk Navigator portfolio stress tool round it out.
- IBKR Desktop (beginner to intermediate). The newer, streamlined desktop app that carries TWS’s most-used tools in a cleaner shell. If TWS feels like a cockpit, start here.
- IBKR Mobile. Full-featured iOS and Android trading with advanced order types.
- Client Portal. Browser-based trading and account management, no download.
- APIs. TWS, Web, Excel, and FIX APIs for automation, which is why IBKR is the default execution layer for retail algo traders.
TWS scanners handle real-time filtering across IBKR’s markets and are configurable well beyond what most broker platforms ship. Plenty of active traders still run a dedicated scanning tool alongside their broker for premarket gapper workflows; our Trade Ideas review covers the most common pairing.
Paper trading deserves a specific mention. Every account can open a simulated account with $1,000,000 in paper equity, real market prices, and the same market data subscriptions as the live account, which means realistic real-time paper quotes require the same paid data subscriptions. Know the documented limitation before you trust your sim results: paper fills are simulated from the top of the book with no deep-book access, so fills on thin names will look better in the simulator than they will live. Treat paper P&L on low-float stocks as optimistic by construction.
Funding and withdrawals
Deposits arrive by ACH, wire, check, or mobile check deposit; physical cash is refused outright, per the funding page. New deposits carry a withdrawal hold period before the money can leave again, which matters if you cycle cash in and out around trades.
Withdrawals are where IBKR’s nickel-counting culture shows: the fee schedule allows two free withdrawal requests per calendar month, then charges $1 per ACH, $4 per check, and $10 per wire in USD. Two free per month is a non-issue for most traders; treat the account as your trading account, not a checking account, and you’ll never see the fee.
Learning curve and support
The learning curve is real and the broker says so itself: the platform lineup literally tags TWS as intermediate to advanced. Layer the market data subscription system on top, with its professional and non-professional classifications, bundles, activity waivers, and line allocations, and a new day trader should budget a week of setup and paper trading before the first live order. The education side is a genuine strength: IBKR Campus and Traders’ Academy carry structured courses, webinars, and platform lessons at no charge.
Support is built for self-service first. The documentation and FAQ system is extensive, and the $30 charge for a telephone order to close a position tells you exactly how the broker wants you to interact with it: through the platform, not the phone. Budget your expectations accordingly.
Who should open an account, and who shouldn’t
Open an IBKR Pro account if you trade actively, care about total cost (commissions plus margin plus data, not just the headline number), want routing you can inspect and override, or plan to automate. Nobody else in the retail space publishes this much of its own machinery.
Skip it, or at least pause, if you want a broker that’s ready to trade an hour after signup. The setup tax is real. And if you short low-float small caps as your bread and butter, do your locate-desk comparison shopping first; the direct-access brokers in our short-selling broker rankings compete specifically on that inventory.
One more reality check that applies to every broker on this site, IBKR included: cheap commissions don’t change the base rates, and most day traders lose money. The cost advantage here only compounds for traders who already have an edge.
Alternatives
Head-to-head, the comparisons that come up most: Webull vs Interactive Brokers for traders weighing a friendlier free platform against IBKR’s routing and rates, and Lightspeed vs Interactive Brokers for the direct-access crowd. Among unmonetized picks we cover fully: thinkorswim if you want a more guided desktop platform inside a big retail broker, and CenterPoint Securities if shorting is the strategy and the account is large enough.
Verdict: 4.5 / 5
Scored on the five criteria from how we rate, with brokers’ core capability defined as execution, routing, and locates:
- Core capability: 4.5. SmartRouting plus direct routing, 100+ order types and algos, published venue economics, real-time short availability search. Docked half a point for the documented three-symbol default cap on simultaneous depth windows, a real constraint for multi-name momentum trading.
- Value: 4.5. For its intended user, the cost-conscious active trader, this is the pricing benchmark: $525 a month all-in for a 105,000-share month on Fixed, 5.12% margin, $0 platform fees, $21 of data largely waivable through activity. Tiered pricing’s pass-through fees make true costs harder to predict than the headline rate suggests.
- Ease of use: 3.5. The broker’s own labels call TWS intermediate to advanced, and the data subscription system adds setup friction nobody warns you about. IBKR Desktop softens the ramp; it doesn’t remove it.
- Trust & transparency: 4.5. Pricing published down to the pass-through fee, payment for order flow disclosed on the Lite plan’s own page, withdrawal fees in plain tables, public-company financials. The discretionary exposure fee for high-risk accounts, changeable without notice, costs the half point.
- Support & education: 3.5. IBKR Campus is genuinely strong free education. Support is self-service by design, and the $30 telephone order fee makes the priorities plain.
Weighted overall (40/20/15/15/10): 4.5, which on our scale means excellent with real trade-offs. The trade-off here is named in the first paragraph: the lowest published costs in mainstream brokerage, paid for in setup time and learning curve. If you’ll do the homework, open the Pro account and start in the simulator; if you won’t, the comparison pages above point to friendlier homes. Either way, read up on the intraday margin rules before sizing your first trade, because the regime that governs your buying power changed this year.
FAQ
Is Interactive Brokers good for day trading?
Yes, on cost and execution control it’s one of the strongest choices available: $0.005 per share fixed pricing, margin from 5.12%, SmartRouting with direct-routing override, and 100+ order types. The trade-offs are a steep learning curve and a market data system you have to configure yourself. It rewards traders willing to do that work and frustrates those who aren’t.
Should day traders choose IBKR Lite or IBKR Pro?
Pro. Lite’s $0 commissions route orders to select market makers under a disclosed payment-for-order-flow arrangement, exclude SmartRouting on US-listed stocks, and carry a margin rate one full point higher. For an active trader, better routing and cheaper margin are worth more than free commissions.
Does the $25,000 pattern day trader rule still apply at Interactive Brokers?
The PDT framework was eliminated industry-wide. FINRA replaced it with risk-based intraday margin requirements effective June 4, 2026: no $25,000 minimum and no trade-count designation, but you must hold adequate margin throughout the trading day. Brokers have a transition window until October 20, 2027 and may phase in the new rules on their own schedule, so confirm with the broker how your account is currently treated.
How much does real-time market data cost at Interactive Brokers?
Free real-time quotes on US stocks and ETFs come from Cboe One and IEX, but they’re non-consolidated and don’t show the NBBO. A typical US day trading stack is about $21 a month for non-professionals: $1.50 each for the NYSE, NYSE American/ARCA, and NASDAQ consolidated feeds, plus $16.50 for NASDAQ TotalView depth, with the TotalView fee waived in months you generate over $20 in commissions.
Is paper trading free at Interactive Brokers?
The simulated account itself is free and starts with $1,000,000 in paper equity using real market prices. It shares your live account’s market data subscriptions, so realistic real-time quotes cost whatever your data subscriptions cost. Paper fills are simulated from the top of the book, which makes simulated fills on thin stocks more forgiving than live ones.
What is the minimum deposit to open an Interactive Brokers account?
There is no account minimum on either plan. Two practical floors still apply: at least $500 in equity is required to subscribe to market data, and FINRA sets $2,000 as the minimum equity for leveraged trading in any margin account.