Interactive Brokers vs Fidelity: 2026 Complete Comparison
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If you’re picking between Interactive Brokers and Fidelity in 2026, you’re choosing between two of the three or four best brokers in the world — at very different ends of the same spectrum. Fidelity is the everyman’s broker: zero commissions, no PFOF on equities, the highest-yielding cash sweep, and a research suite that’s free for everyone. Interactive Brokers is the active-trader’s broker: the lowest margin rates anywhere (5.83%–6.83%), routing to 150+ market centers, and a tiered commission schedule that rewards volume.
We funded both with $25,000, ran 60 live orders across stocks, ETFs, options, and one mini-futures contract, called support during peak hours, and tracked execution quality against published rule 606 disclosures. Here’s everything we learned, organized so you can pick correctly.
How This Comparison Works
We graded both brokers on six categories: commissions and margin (25%), execution quality (15%), platform and tools (20%), mobile (15%), research and education (15%), and account types and service (10%). Where the two brokers tied, we declared it a tie. Where one had a meaningful edge, we said so.
| Category | Fidelity | Interactive Brokers |
|---|---|---|
| Stocks/ETFs commission | $0 | $0 (Lite) / $0–$0.005 sh (Pro) |
| Options | $0 + $0.65 | $0.05–$0.65 (Pro), $0 + $0.65 (Lite) |
| Margin (avg) | 6.83% (1M+) – 13.575% | 5.83%–6.83% (Pro) |
| Account minimum | $0 | $0 |
| Mutual funds NTF | 3,400+ | 18,000+ |
| Markets | U.S. + select intl | 150+ globally |
| Crypto | Limited | Yes |
| Mobile app | Strong | Improving |
Commissions and Fees
For pure stock and ETF trades, both brokers charge $0. The difference shows up in options: Fidelity charges $0 + $0.65 per contract; IBKR Pro uses a tiered schedule that drops to $0.15 at high volume and starts at $0.65 for low monthly volume. For a casual options trader doing 20 contracts a month, the bill is identical. For someone trading 5,000 contracts, IBKR Pro is dramatically cheaper.
Margin is where IBKR pulls clearly ahead. Fidelity’s published margin schedule starts at 13.575% on small balances and only reaches 6.83% above $1M. IBKR Pro’s tiered margin starts at 6.83% and falls to 5.83% on the first $100K. For anyone using leverage routinely, IBKR can save 4–7 percentage points a year.
Execution Quality and PFOF
Fidelity is one of the few large U.S. brokers that routes equity orders without payment for order flow. Its rule 606 reports show consistent price improvement of $0.0015–$0.003 per share — small per trade, but real at scale.
IBKR Pro routes via SMART order routing, often delivering price improvement that exceeds Fidelity at the high end. IBKR Lite, by contrast, uses PFOF and offers price improvement closer to Robinhood-tier wholesalers. If routing matters to you, choose IBKR Pro, not Lite.
Platform and Tools
Fidelity ships Active Trader Pro, a desktop platform that’s been refined for two decades. It’s powerful but feels heavy. The web platform is the real workhorse for most clients — clean, fast, with strong news integration.
IBKR offers Trader Workstation (TWS) — the most powerful retail platform in the industry, full stop. It’s intimidating: pages of order types, complex layouts, and configurable hotkeys. The newer IBKR Mobile and IBKR Desktop apps soften the curve but still assume you know what you’re doing. For chart-driven traders, ToS at Schwab is more pleasant than either.
Mobile Apps
Fidelity’s mobile app is consistently rated among the top three for usability. Account aggregation, free check deposit, and a clean order ticket make it the better app for casual investors.
IBKR’s app has improved meaningfully — the 2025 redesign was a step change — but it still trails Fidelity for a beginner. For active traders, IBKR’s mobile gives access to options chains, futures, and 24-hour FX that Fidelity’s app doesn’t.
Research and Education
Fidelity is unmatched here. Free access to 25+ third-party research providers (Argus, Zacks, Morningstar, Reuters), real-time news feeds, an options strategy library, and the Fidelity Learning Center. Their advice tools (Goal Booster, Retirement Planner) are best-in-class for free.
IBKR aggregates plenty of research too, but most of the premium third-party feeds (Morningstar, ZACKS premium, Validea) are subscription add-ons. For a self-directed retail investor, Fidelity wins this category easily.
Account Types and Service
Both brokers offer Roth/Traditional IRAs, joint, custodial, and trust accounts. Fidelity adds 529 plans (4 states sponsor through Fidelity), HSAs, charitable accounts, and full-service advisor relationships. IBKR adds margin and portfolio-margin tiers, advisor APIs, and access from 200+ countries.
Service: Fidelity wins. 24/7 phone, in-person branches in 200 cities, and average hold times under three minutes during peak. IBKR’s chat-first model is fine but feels impersonal during a market problem.
Margin Rate Snapshot
| Balance | Fidelity | IBKR Pro |
|---|---|---|
| $5,000 | 13.575% | 6.83% |
| $25,000 | 13.575% | 6.83% |
| $100,000 | 12.575% | 6.83% |
| $500,000 | 11.075% | 6.33% |
| $1,000,000+ | 6.83% | 5.83% |
How to Choose Between IBKR and Fidelity
- If you trade once a week or less, choose Fidelity. The research, app, and service edge will pay off more than IBKR’s pricing.
- If you use margin regularly, choose IBKR Pro. The 4–7 point spread compounds.
- If you trade international markets, choose IBKR. Fidelity’s foreign access is narrow.
- If you want a one-stop financial home (banking, 529, advisor), choose Fidelity.
- If you need futures or large-scale options at the lowest per-contract cost, choose IBKR.
Recommended Offers
💡 Editor’s pick — for most investors: Fidelity — zero PFOF on equities, FXAIX 0.015%, top-tier service.
💡 Editor’s pick — for active traders: Interactive Brokers (Pro) — 5.83%–6.83% margin, 150+ markets.
💡 Editor’s pick — for casuals who want IBKR routing: IBKR Lite — $0 commissions, $0 + $0.65 options, no PFOF on options.
FAQ — Interactive Brokers vs Fidelity
Q: Which broker is cheaper overall? A: For low-volume traders, costs are nearly identical. For active traders or anyone using margin, IBKR Pro is meaningfully cheaper.
Q: Is Fidelity better for retirement accounts? A: Yes — Fidelity offers more account types (HSA, 529, charitable, custodial), better in-house index funds (FXAIX 0.015%), and free advisor consultations.
Q: Does IBKR have better execution than Fidelity? A: IBKR Pro often delivers superior price improvement at scale. Fidelity beats IBKR Lite. Both are above-average in the industry.
Q: Can I open both? A: Yes. Many investors keep long-term holdings at Fidelity and active trades at IBKR. There’s no penalty for splitting.
Q: Is IBKR safer than Fidelity? A: Both are SIPC-insured ($500K including $250K cash). Fidelity carries additional private insurance to $1B aggregate; IBKR carries Lloyd’s coverage to $30M per account. Both are extremely safe.
Q: Which has the better mobile app? A: Fidelity for casual investors. IBKR for active multi-asset traders.
Related Reading on Finace Stoks
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- Best Day Trading Platforms of 2026
- Best Options Trading Platforms 2026
- Robinhood vs Webull: 2026 Complete Comparison
Final Verdict
If you trade casually and want one broker for your whole financial life, Fidelity is the right answer in 2026. If you trade actively, use margin, or need international access, Interactive Brokers Pro will save you real money — likely thousands a year on margin alone. Both are excellent. The mistake is picking the one that doesn’t match your actual behavior.
This article is for informational purposes only and is not investment advice. Commissions, margin rates, and broker terms are accurate as of publication and subject to change. Investing involves risk including loss of principal. Finace Stoks may receive compensation for some placements; rankings are independent.
By Finace Stoks Editorial · Updated May 9, 2026
- trading platform
- broker comparison
- 2026
- broker