Interactive Brokers vs comdirect — which broker is better?

Pros

• US stocks from USD 0.0035 per share on the Tiered plan, minimum USD 0.35 per order and capped at 1% of trade value
• Currency conversion at 0.20 basis points (minimum USD 2) — an order of magnitude cheaper than most European brokers' 0.25%–1.5%
• Roughly 160 market destinations in 36 countries from a single multi-currency account, with 28 settlement currencies
• No inactivity fee since 2021, plus no custody fee and no platform fee
• Trader Workstation offers over 100 order types plus a mature Python/Java/REST API used widely by retail algo traders
• Nasdaq-listed parent (IBKR) with published quarterly financials and around USD 21 billion of equity capital
• Top-tier licences in the US, UK, Ireland, Australia, Singapore and Hong Kong, with per-entity investor compensation disclosed
• Paper trading account mirrors the live platform, including the full API

Cons

• Customer support is the most common complaint: many requests go through the ticket system, and public reviews (e.g. on Trustpilot) often cite slow replies and template answers
• Trader Workstation has a genuinely steep learning curve; the first session is intimidating even for experienced traders
• The fee schedule is complicated: Fixed versus Tiered, pass-through exchange fees, and per-exchange minimums make cost prediction harder than it should be
• Real-time market data is a paid subscription per exchange, so the headline commissions understate the true monthly cost for active traders
• Account opening is longer and more document-heavy than at app-first brokers, and the website navigation is poor
• Spot crypto is only available to US clients via a separate arrangement; EEA clients get futures and exchange-traded products instead

Pros

• The broadest product range of the three German incumbents: shares, ETFs, funds, bonds, certificates, warrants, CFDs and direct Eurex options and futures in one depot
• Excellent platform stack — ProTrader for real-time multi-monitor trading, O&F-Trader with a margin simulator, CFD Trader with a free demo, plus a documented REST API and stock3, TraderFox and Quant4you integrations
• Cash sits behind Commerzbank AG: statutory EdB cover of EUR 100,000 plus the voluntary BdB Einlagensicherungsfonds protecting private individuals up to EUR 3 million, with direct ECB supervision as a significant institution
• Custody is now free for depots opened from 15 July 2026, and the second depot has always been free
• Cheap Eurex derivatives pricing: EUR 1.50 per single-stock option contract and EUR 1.50 for the MicroDAX future, each with a EUR 9.90 execution minimum
• Fully tax-simple for German residents — automatic Abgeltungsteuer withholding, Freistellungsauftrag, loss-offset pots and free annual tax certificates
• A EUR 1.00 Pure Depot exists for investors who only need gettex and savings plans, and a 15% Viel-Trader discount rewards 125+ trades per half-year

Cons

• Standard commissions are among the highest in the market: EUR 4.90 plus 0.25% of order value, minimum EUR 9.90 and maximum EUR 59.90, plus a EUR 2.50 venue fee — roughly four times what flatex charges on a EUR 10,000 order
• Savings plans cost 1.50% of the amount invested per execution. On a EUR 500 monthly ETF plan that is EUR 7.50 a month, or EUR 90 a year, where Consorsbank and flatex both charge zero
• Customer service is the standout failure: 1.4 out of 5 on Trustpilot across 4,117 reviews, dominated by complaints about extremely long telephone hold times and unhelpful responses, despite the advertised 24/7 desk
• The advertised EUR 3.90 per trade applies only to new depot customers for 36 months, after which the full tariff returns — the headline number is not the price you end up paying
• The cheap Pure Depot is heavily restricted: gettex only, no off-exchange trading, no derivatives, no IPOs, no ProTrader, no securities credit, no joint or second depot
• No spot cryptocurrency and no wallet — exposure is limited to crypto certificates and ETNs, and foreign trades settle at Commerzbank reference rates rather than a published percentage markup; comdirect's own cost disclosure estimates the conversion at 1%