Best Stocks and Shares ISA Providers UK 2026: Fees, Features and Who They Suit

Three fees determine what you'll pay:

Platform fee: An annual charge based on your portfolio value (e.g., 0.25%) or a flat subscription (e.g., £11.99/month). This is the fee that matters most for long-term investors.

Dealing fee: Charged each time you buy or sell. Ranges from £0 (Trading 212, InvestEngine) to £11.95 (Hargreaves Lansdown for shares). If you invest monthly into funds, a £1.95 dealing fee adds up to £23.40 per year — per fund.

Fund management fee (OCF): Charged by the fund itself, not the platform. A Vanguard FTSE All-World tracker charges 0.22%. This fee is identical regardless of which platform you use.

The platform fee is the only one within your control at the account-opening stage. The table below shows what each provider charges on portfolios of different sizes:

According to the latest Moneyfacts platform comparison, these numbers exclude dealing fees and fund OCFs. For a buy-and-hold investor making 12 trades per year in funds, add roughly £0 (Trading 212), £0 (InvestEngine), £0 (Vanguard own funds), £18 (AJ Bell), £0 (ii, included in subscription), or £23.40 (HL).

Trading 212 — Best for beginners and small portfolios

Zero platform fee. Zero dealing commission. Fractional shares from £1. Which? ranked it #1 of 23 providers with an 83% customer score. The catch? Limited fund range compared to full-service platforms — you're mostly buying individual shares and ETFs, not the full universe of UK unit trusts. For a beginner investing £100/month into a global ETF, this is the cheapest option by far. See our Trading 212 review for the full picture.

InvestEngine — Best for ETF investors

Also zero platform fee for DIY investing. Specialises in ETFs with commission-free trading. Which? gave it a 76% score and named it a Great Value Provider. The managed portfolio option charges 0.25%, but the DIY route costs nothing. If your strategy is "buy a handful of ETFs and hold them for 20 years," InvestEngine is hard to beat. See our InvestEngine review for the full breakdown.

Vanguard Investor — Best for passive fund purists

Charges 0.15% annually, capped at £375 per year. Access limited to Vanguard's own fund range — about 90 funds, all passive, all low-cost. The LifeStrategy and Target Retirement funds are genuinely excellent one-fund solutions. If you want simplicity and don't need to pick individual stocks, Vanguard remains the gold standard. Read our Vanguard review for more detail.

AJ Bell — Best all-rounder

Charges 0.25% on funds (capped at £42/year for shares and ETFs). The broadest investment range of any provider on this list — shares, funds, ETFs, investment trusts, bonds, gilts. Which? scored it 77% (#2 of 23). The AJ Bell Dodl sub-brand offers a stripped-down version at 0.15%. For a mid-sized portfolio that needs flexibility, AJ Bell hits the sweet spot. Our AJ Bell review covers the fee structure in detail.

Interactive Investor — Best for large portfolios

Flat subscription: £11.99/month (Investor plan) includes one free trade per month. On a £100,000+ portfolio, this flat fee works out cheaper than percentage-based platforms — 0.14% versus AJ Bell's 0.25%. The breakeven point is around £57,000. Below that, ii is expensive. Above it, the flat fee becomes a bargain. See our Interactive Investor review.

Hargreaves Lansdown — The premium choice

The UK's biggest platform, recently dropped from 0.45% to 0.35% (from 1 March 2026) and introduced a £1.95 fund dealing fee. Still the most expensive mainstream option, but offers the widest fund range, excellent research, and a mobile app that actually works well. Our Hargreaves Lansdown review explains whether the premium is justified.

The right platform depends almost entirely on how much you're investing. Here's the decision tree:

Under £10,000: Trading 212 or InvestEngine. Zero fees mean your entire return stays invested. At this level, even a 0.25% platform fee only costs £25/year — but why pay anything when you don't have to?

£10,000 to £50,000: AJ Bell or Vanguard. AJ Bell if you want access to individual shares and a wide fund range. Vanguard if you're happy with their passive fund selection and want the simplest possible setup.

£50,000 to £100,000: AJ Bell or Interactive Investor. Run the numbers — ii's flat £143.88/year starts beating AJ Bell's 0.25% (£125-£250) at around £57,000.

Over £100,000: Interactive Investor. The flat fee becomes increasingly attractive. At £250,000, ii costs £143.88 versus AJ Bell's £625 or HL's £875.

One thing these numbers don't capture: the cost of doing nothing. If choosing a platform feels overwhelming and you leave £20,000 in a cash savings account for a year instead of investing it, the opportunity cost over a decade — assuming 5% average equity returns — is roughly £12,500 in missed growth. For broader guidance on building a portfolio, visit our investing hub. The "best" platform is whichever one you actually open.

Fees get all the attention. But three other factors separate a good experience from a frustrating one:

Investment range: Vanguard offers ~90 funds. Trading 212 focuses on shares and ETFs. AJ Bell and HL offer thousands of funds, investment trusts, individual shares, and bonds. If you want to buy Scottish Mortgage Investment Trust or a specific gilt, you need a full-service platform.

Transfer process: Moving an existing ISA to a new provider takes 15-30 business days. The FCA requires that cash ISA transfers complete within 15 business days and stocks & shares within 30. Some providers (AJ Bell, HL) offer transfer incentives — cashback or fee-free periods. Always transfer in specie (keeping your investments) rather than selling and rebuying, which creates a gap out of the market.

Customer service: Which?'s survey of 3,053 investors scored Trading 212 highest overall (83%). Hargreaves Lansdown scored just 58% — surprising for a premium-priced platform. If you value phone support and hand-holding, ii and AJ Bell score better than HL on customer satisfaction.

The FCA's guidance on ISA transfers sets the maximum timescales. All six providers on this list are FCA-regulated and your investments are protected by the FSCS up to £85,000 if the platform fails. This covers the platform going bust, not your investments falling in value — that risk is yours.

The 2025/26 tax year ends on 5 April. Your £20,000 ISA allowance expires with it — unused allowance cannot be carried forward.

If you haven't opened a stocks and shares ISA yet, here's the minimum viable action plan:

Week 1: Open an account. Trading 212 and InvestEngine have instant online setup. AJ Bell and Vanguard take 1-2 business days. HL and ii are similar.

Week 2: Fund it. Bank transfer is fastest — most platforms credit funds within 1-2 business days. Don't wait for a cheque to clear.

Week 3: Invest. If you're unsure what to buy, a single global tracker ETF (like Vanguard FTSE All-World, ticker VWRL) gives you instant diversification across 3,700+ companies worldwide. You can refine your strategy later.

The biggest mistake isn't picking the "wrong" platform — it's not picking any platform and letting the deadline pass. A stocks and shares ISA shelters your gains from capital gains tax and your dividends from dividend tax for life. At current rates, the CGT annual exempt amount is just £3,000, so the ISA wrapper becomes valuable faster than most people realise.

For the full breakdown of ISA types — including Lifetime ISAs and Innovative Finance ISAs — visit our ISA hub. You can also model your long-term ISA growth with our ISA calculator. For tax-year-end planning across all allowances, check our tax planning hub.

This article is for informational purposes only and does not constitute financial advice. You should seek independent financial advice before making any investment decisions.