Lowest-Cost Brokers
Weighted almost entirely on what it costs to run an account — commissions, spreads, currency conversion and inactivity charges — because for a long-term investor cost is the one variable you control.
How this ranking is built
Every broker carries the same five scores across the whole site. This page re-weights them for this specific use case — nothing is hand-placed, and the weighting is shown here so you can disagree with it:
Plain Investor has no commercial relationship with any broker listed. Rankings reflect independent research only. Scores reflect our methodology as of September 2026 and are not personalised advice — always verify current terms with the broker.
- 1
Interactive Brokers
4.9fitWhy here: Unmatched global market access from a single account
Watch out: Trader Workstation has a genuinely steep learning curve
Read the full Interactive Brokers review → - 2
Fidelity
4.8fitWhy here: Zero-fee index funds and unusually deep retirement planning tools
Watch out: Less suited to active derivatives trading than some rivals
Read the full Fidelity review → - 3
Charles Schwab
4.4fitWhy here: thinkorswim's professional tooling alongside full-service support
Watch out: Low interest paid on uninvested cash; limited crypto access
Read the full Charles Schwab review → - 4
Webull
4.2fitWhy here: Charting and paper trading well beyond what a free app usually offers
Watch out: No mutual funds, and its ownership history has drawn US scrutiny
Read the full Webull review → - 5
Pepperstone
3.8fitWhy here: Raw spreads with a choice of MT4, MT5, cTrader and TradingView
Watch out: Derivatives only — there is nothing here to buy and hold
Read the full Pepperstone review → - 6
DEGIRO
3.7fitWhy here: Among the lowest per-trade costs available in Europe
Watch out: Basic platform, no forex, and not open to US residents
Read the full DEGIRO review → - 7
IG
3.7fitWhy here: Trading since 1974, LSE-listed, with very wide market access
Watch out: Most of the range is leveraged rather than owned
Read the full IG review → - 8
Robinhood
3.7fitWhy here: A genuinely simple mobile app with an IRA contribution match
Watch out: No mutual funds or individual bonds, and a $100 outgoing transfer fee
Read the full Robinhood review → - 9
Public.com
3.6fitWhy here: Moved away from payment for order flow on stock and ETF trades
Watch out: A shorter track record, with some features behind a subscription
Read the full Public.com review → - 10
Trading 212
3.6fitWhy here: Pies and AutoInvest, with a £1 minimum to start
Watch out: No mutual funds, bonds, desktop platform or phone support
Read the full Trading 212 review → - 11
eToro
3.4fitWhy here: CopyTrader, the most developed social investing product
Watch out: Heavy CFD component outside the US and UK, plus withdrawal and FX fees
Read the full eToro review → - 12
XTB
3.4fitWhy here: Commission-free stocks and ETFs up to a high monthly threshold
Watch out: The product range is CFD-weighted, and availability varies by country
Read the full XTB review → - 13
Saxo Bank
3.2fitWhy here: Professional-grade platforms and exceptional instrument breadth
Watch out: Premium pricing, with custody fees on some account tiers
Read the full Saxo Bank review → - 14
Plus500
3.1fitWhy here: A simple proprietary platform backed by an LSE-listed parent
Watch out: No real asset ownership at all, and no MT4 or MT5
Read the full Plus500 review → - 15
Capital.com
3.0fitWhy here: An app that actively surfaces behavioural feedback on your trading
Watch out: CFDs only, and a shorter track record than the older names
Read the full Capital.com review → - 16
Revolut
3.0fitWhy here: Investing built into an app millions already have open
Watch out: A narrow menu with tiered free-trade limits; not a dedicated broker
Read the full Revolut review →