A Stocks & Shares ISA lets you invest up to £20,000 per tax year with no income tax or capital gains tax on returns. With a wide range of platforms on the market, choosing the right provider — and keeping fees low — can meaningfully change your long-term outcome. This league table ranks the leading Stocks & Shares ISA platforms for 2026. It is general information, not a personal recommendation.
Key takeaways
- The annual ISA allowance is £20,000 for 2026/27; returns are completely tax-free
- Vanguard (0.15%, capped £375/yr) is cheapest for index investors within the Vanguard range
- Trading 212 charges no platform fee but uses a payment-for-order-flow model
- interactive investor's flat fee is better value than percentage fees above ~£40k
- HL offers the widest choice but at the highest cost; worth it only if you use the extra features
2026 Stocks & Shares ISA League Table
Ranked by overall value for a typical investor contributing £500/month into a low-cost global index fund. Fees shown are as published by each provider and correct as at June 2026.
| # | Provider | Platform Fee | Trading Cost | Investment Range | Verdict |
|---|---|---|---|---|---|
| 1 | Vanguard | 0.15% p.a. (capped £375/yr) | Free (Vanguard funds) | Vanguard funds & ETFs only | Cheapest option for index investors; limited to Vanguard's own range |
| 2 | Trading 212 | 0% platform fee | Free (stocks & ETFs) | Shares, ETFs (10,000+ instruments) | No platform fee makes it excellent for active traders; note payment-for-order-flow model |
| 3 | AJ Bell | 0.25% up to £250k; 0.10% to £500k; 0.05% above | £1.50 (funds), £9.95 (shares/ETFs) | Wide: funds, ETFs, investment trusts, shares | Solid all-rounder with a wide range; competitive at mid-sized pots |
| 4 | interactive investor | £4.99/month (Investor Essentials, ISA only) | Two free trades/month; £5.99 thereafter | Wide: funds, ETFs, investment trusts, shares | Flat fee excellent for pots above ~£40k; includes research and news |
| 5 | Fidelity | 0.35% up to £250k (min £45/yr); capped £45/month on shares/ETFs | £10 (shares/ETFs; free for funds) | Wide fund range including institutional classes | Strong fund range; cap on shares charges provides some protection at scale |
| 6 | Hargreaves Lansdown | 0.45% up to £250k (capped £45/yr on shares/ETFs) | £11.95 (1–9 trades/month); less with volume | Broadest range: funds, ETFs, investment trusts, shares | Premium service and widest choice; higher cost than rivals |
Sources: provider fee schedules accessed June 2026; MoneyHelper: ISAs; the lang cat Platform Market Monitor Q1 2026.
Provider Shortlist: Who Should Consider Each?
- Vanguard ISA — Ideal for passive investors who are happy with Vanguard's own fund and ETF range. The fee cap makes it one of the most cost-efficient options for larger pots. Not suitable if you want a broader investment universe.
- Trading 212 ISA — The zero platform fee is genuinely compelling for frequent traders and those building a diversified ETF portfolio. Trading 212 uses a payment-for-order-flow model, which is legal in the UK; understand the order execution policy before using it for large trades.
- AJ Bell ISA — A well-rounded platform offering a wide range of funds, ETFs, investment trusts, and shares. The tiered percentage fee is competitive across most pot sizes.
- interactive investor ISA — The £4.99/month flat fee (ISA-only plan) is excellent value for pots above around £40,000. The more expensive plans unlock more accounts and features.
- Fidelity ISA — One of the widest fund ranges in the market, including institutional share classes not widely available elsewhere. Good for fund-focused investors.
- Hargreaves Lansdown ISA — The market leader by assets. Premium service, extensive research, and the broadest investment choice, but at a higher cost. Consider whether you will make use of the extra features.
You can use our financial planning tools to model how different platform charges compound over a 10, 20, or 30-year ISA investment horizon.
ISA Rules at a Glance
The annual ISA allowance for 2026/27 is £20,000. Returns within the ISA wrapper are completely free of income tax, capital gains tax, and dividend tax. Key rules to remember:
- You can subscribe to one Stocks & Shares ISA per tax year (plus one Cash ISA and one Lifetime ISA).
- The £20,000 allowance is shared across all ISA types (except Junior ISAs).
- Unused allowance cannot be carried forward — it is lost at the end of the tax year.
- Transfers between providers do not affect your annual allowance, provided you use the official ISA transfer process.
For the full picture on ISA types and rules, see our guide ISAs Explained. If your estate is above the IHT threshold, note that ISA funds form part of your estate on death — use our estate planning tools to model the IHT interaction.
Methodology and Sources
Updated: June 2026. Next scheduled review: December 2026.
Ranking criteria (in order of weighting):
- Total annual cost (50%) — Modelled on a £30,000 pot and a £150,000 pot invested in a typical global index fund (0.15% OCF).
- Investment range (25%) — Number of funds, ETFs, investment trusts, and shares available.
- Service quality (15%) — Trustpilot score, Financial Ombudsman data, and availability of customer support channels.
- Usability (10%) — Quality of mobile app, onboarding experience, and reporting tools.
Sources:
- Provider fee schedules: Vanguard, Trading 212, AJ Bell, interactive investor, Fidelity, Hargreaves Lansdown
- MoneyHelper: ISAs
- lang cat Platform Market Monitor, Q1 2026; FCA Register (June 2026)
Important: This table is general information, not a personal recommendation. Always read the provider's key investor information and terms before opening an account. Consider taking advice from a regulated financial adviser.
Important: This guide is for general educational purposes only and does not constitute financial advice. Tax rules can change and individual circumstances vary. If you need advice tailored to your situation, please consult a qualified, FCA-regulated financial adviser. You can browse advisers in our adviser directory.