Best Stocks and Shares ISA UK 2026: Top Platforms Compared
The best stocks and shares ISA UK right now is InvestEngine, which charges zero platform fees on DIY portfolios and gives you access to over 610 ETFs in a flexible, FSCS-protected account. If you want hands-off investing with a trusted name behind it, Vanguard is the strongest alternative. For most people, one of these two covers everything they need.
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What is a stocks and shares ISA?
A stocks and shares ISA is a tax-free investment account that lets you buy funds, ETFs, shares, and bonds without paying Capital Gains Tax or Income Tax on any returns. Every UK adult gets a £20,000 annual ISA allowance for 2026/27, and you can put all of it into a stocks and shares ISA or split it across different ISA types.
The key difference between this and a cash ISA is risk and potential reward. Your money is invested rather than saved, which means the value can go up or down. In exchange, the long-term growth potential is significantly higher than cash — though nothing is guaranteed. This type of account is best suited to money you will not need to access for at least five years.
One rule change worth knowing: from April 2027, under-65s will be limited to depositing £12,000 per year into cash ISAs, with the remaining £8,000 of the annual allowance directed toward investment vehicles. If you have been sitting on the fence about investing, 2026/27 is your last year to choose freely.
InvestEngine: best for zero platform fees
InvestEngine is the strongest pick for cost-conscious investors who are happy to choose their own ETFs. There are no platform fees, no trading fees, and no withdrawal charges on DIY portfolios — you only pay the underlying ETF costs set by the fund providers, which start from as little as 0.03% per year. Over a decade, that difference in fees compounds to a meaningful sum.
The platform holds over 610 ETFs covering global equities, bonds, sectors, and commodities. You can start with as little as £100 or set up a regular savings plan from £20 a month, making it accessible whether you are investing a lump sum or building a pot gradually. The ISA is flexible, meaning you can withdraw and replace money within the same tax year without using up your £20,000 allowance.
The main limitation is that InvestEngine only supports ETFs — you cannot buy individual shares, investment trusts, or bonds. Managed portfolios are also temporarily unavailable while the platform makes updates. For investors who want a simple, low-cost ETF portfolio and nothing more, this is the best value account on the market. Capital at risk.
Vanguard: best for hands-off investors
Vanguard is the go-to platform for people who want to set up a sensible portfolio and leave it alone. The platform fee is 0.15% per year on balances up to £250,000, capped at £375 — one of the cheapest percentage-based fees available. Funds are exclusively Vanguard’s own, which keeps things simple and keeps costs low, with options including the popular LifeStrategy range that automatically balances risk for you.
You can choose to manage your own investments through the self-managed ISA, or hand control to Vanguard through the Managed ISA, where the platform builds and maintains a portfolio based on your attitude to risk. There are no trading fees for buying or selling funds, no exit charges, and no withdrawal fees. The minimum investment is £500 as a lump sum or £100 per month.
The trade-off is range. You can only invest in Vanguard’s own funds — around 85 in total — which rules out individual shares, ETFs from other providers, and investment trusts. For most long-term passive investors this is not a problem, but active investors or those who want access to a broader universe will find the platform limiting. Which? Recommended for over seven years. Capital at risk.
Hargreaves Lansdown: best for fund range and research
Hargreaves Lansdown is the UK’s largest investment platform with over 2 million clients, and it earns that position through sheer breadth. The platform offers access to over 3,000 funds alongside shares, ETFs, investment trusts, and bonds. The Wealth Shortlist gives you a curated selection of funds across categories, which is genuinely useful if you are not sure where to start. Customer service is available by phone, which not every platform offers.
The platform fee is 0.45% per year on funds, capped at 0.45% per year — the highest of the five platforms reviewed here. From 1 March 2026, HL introduced a £1.95 fund dealing fee each time you buy or sell, which adds up if you invest regularly in small amounts. For larger, less-frequent investments the overall cost is more competitive, and the quality of the research tools and educational content helps justify the premium.
HL is the right choice if you value breadth, support, and research over headline fees. It is a less good fit if you are starting out with small monthly contributions or if keeping costs as low as possible is your priority. Capital at risk.
Open a Hargreaves Lansdown ISA →
AJ Bell: best all-round platform
AJ Bell sits between Vanguard’s simplicity and Hargreaves Lansdown’s full-service offering. The platform fee is 0.25% on funds, capped at £3.50 per month for shares and ETFs held in an ISA — which makes it particularly good value for ETF investors with growing portfolios. The investment range covers over 16,500 UK and international shares, 4,000 ETFs, and 4,400 funds, giving you genuine flexibility without the complexity of managing an account built for professional traders.
AJ Bell has been Which? Recommended for eight consecutive years from 2019 to 2026, and fund dealing costs £1.50 per trade — significantly cheaper than Hargreaves Lansdown. The ready-made fund range and Favourite Funds list are useful starting points if you want some guidance without handing full control to the platform. Regular investing is available from £25 per month at £1.50 per trade.
The main weakness is that fund dealing fees apply to every trade with non-AJ Bell funds, which can make it more expensive than Hargreaves Lansdown for investors who buy and sell funds frequently in small amounts. If you invest in ETFs rather than active funds, the fee cap makes this one of the better-value platforms at most portfolio sizes. Capital at risk.
Interactive Investor: best for larger portfolios
Interactive Investor (ii) is the UK’s only major flat-fee investment platform, which changes the maths significantly as your portfolio grows. Rather than charging a percentage of your assets, ii charges a fixed monthly fee: £5.99 per month on the Core plan for portfolios up to £100,000, £14.99 per month on Plus, and £39.99 per month on Premium. The more you have invested, the cheaper this becomes relative to percentage-based platforms.
The investment range is comprehensive, covering UK and international shares, funds, ETFs, bonds, and investment trusts. The Plus and Premium plans include free accounts for family members, which is a distinctive feature for households looking to invest collectively. The Managed ISA is available for hands-off investors, with portfolios built in partnership with Aberdeen. Regular investing is available from £25 per month with no trading fee.
The flat fee works against you at lower portfolio values — on a £10,000 portfolio, £5.99 per month represents 0.72% annually, which is more expensive than both Vanguard and AJ Bell. ii becomes competitive around the £50,000 mark and increasingly strong above £100,000. If you are just starting out, one of the percentage-fee platforms will likely serve you better until your portfolio grows. Capital at risk.
Open an Interactive Investor ISA →
How the platforms compare
| Platform | Platform fee | Investment range | Best for |
|---|---|---|---|
| InvestEngine Top pick | £0 (DIY) | 610+ ETFs | Low-cost ETF investing |
| Vanguard | 0.15% (cap £375) | 85+ funds | Hands-off passive investing |
| Hargreaves Lansdown | 0.45% | 3,000+ funds | Research and fund range |
| AJ Bell | 0.25% (ETF cap £42/yr) | 4,400+ funds, 4,000+ ETFs | All-round value |
| Interactive Investor | From £5.99/month | Wide range inc. bonds | Larger portfolios |
Head to head
InvestEngine vs Vanguard: both are strong picks for cost-conscious investors, but they suit different approaches. InvestEngine charges nothing to hold a DIY portfolio and gives you access to ETFs from dozens of providers. Vanguard charges 0.15% but limits you to its own fund range, which includes the highly regarded LifeStrategy portfolios. If you want total flexibility and the lowest possible fee, InvestEngine wins. If you want a trusted single-provider platform that manages the balance for you, Vanguard is the better fit.
Hargreaves Lansdown vs AJ Bell: these two compete most directly for investors who want a full-service platform with a wide fund range. Hargreaves Lansdown charges more — 0.45% versus AJ Bell’s 0.25% — and now adds a £1.95 per trade fund dealing fee, making it noticeably more expensive for regular investors. AJ Bell offers a comparable range at a lower cost, with slightly less hand-holding and research depth. For most investors, AJ Bell represents better value; HL earns its premium mainly through customer service quality and the depth of its research tools.
Interactive Investor vs the rest: ii is in a category of its own on fee structure. The flat monthly fee is a disadvantage at lower portfolio values but becomes a significant saving once your pot passes £50,000 to £100,000. At £250,000 invested, a 0.25% platform fee costs £625 per year; ii’s Plus plan costs £179.88. The gap widens further above that. If you are investing for the long term and expect your portfolio to grow substantially, locking in a flat-fee structure early makes strategic sense even if it costs slightly more in the early years.
ETF investors vs fund investors: your choice of investments matters as much as the platform fee. InvestEngine and AJ Bell are the strongest picks for ETF investors, with InvestEngine charging nothing and AJ Bell capping share and ETF fees at £42 per year. If you plan to invest mainly in active funds, Hargreaves Lansdown’s no-dealing-fee structure (prior to the March 2026 change) made it competitive, but that advantage has now narrowed. Vanguard remains the cheapest option if you are happy to stay within its own fund range.
Other platforms worth considering
The five platforms above cover most investors’ needs, but a few others are worth a mention. Freetrade offers commission-free share trading and a stocks and shares ISA from £5.99 per month on the Standard plan. It suits younger investors who want to buy individual shares without paying per-trade fees, though the investment range is more limited than AJ Bell or Hargreaves Lansdown. Trading 212 offers a zero-fee ISA with fractional shares and commission-free trading, making it a strong option for investors who want to drip-feed small amounts into individual stocks. Nutmeg is worth considering if you want a fully managed ISA with a clean app experience and a straightforward risk-based portfolio, though its fees are higher than the DIY platforms reviewed above.
Verdict
For most people starting out or looking to keep costs low, InvestEngine is the clear winner. Zero platform fees, a wide ETF range, and a flexible ISA wrapper make it hard to beat on pure value. If you want a simpler experience with ready-made fund options and a trusted brand, Vanguard is the strongest runner-up. Investors who want the widest possible investment range should look at Hargreaves Lansdown or AJ Bell, with AJ Bell offering better value for most portfolio sizes. And if your pot is already sizeable or you plan to build one over the long term, Interactive Investor’s flat-fee structure is worth the slightly higher cost in the early years.
Whichever platform you choose, the most important step is to start. The value of a stocks and shares ISA comes from time in the market, not from picking the perfect platform. Remember that your capital is at risk and the value of your investments can go down as well as up.
Frequently asked questions
Can I have a stocks and shares ISA and a cash ISA at the same time?
Yes — you can hold both in the same tax year as long as your combined contributions stay within the £20,000 annual ISA allowance. Since April 2024 you can also open more than one of the same ISA type across different providers in the same tax year.
What happens to my stocks and shares ISA if the platform goes bust?
Your investments are held separately from the platform’s own assets, so they can be transferred to another provider if the company fails. The FSCS also protects up to £85,000 per firm in the event assets cannot be returned — though this does not cover losses from market falls.
How much do I need to start a stocks and shares ISA?
It depends on the platform. InvestEngine lets you start from £100 as a lump sum or £20 per month, while Vanguard requires a £500 lump sum or £100 per month. Most platforms also offer regular monthly investing options so you can build a pot gradually.
Is a stocks and shares ISA better than a pension?
They serve different purposes. A pension locks your money away until at least age 57 but comes with tax relief on contributions. A stocks and shares ISA is more flexible — you can withdraw at any time — but contributions come from taxed income. Many people use both.
What is the ISA allowance for 2026/27?
The annual ISA allowance is £20,000 for the 2026/27 tax year. You can split this across different ISA types, including cash and stocks and shares ISAs, as long as the total does not exceed £20,000.
The right platform depends on how you invest, how much you have to start with, and how involved you want to be — but any of the five reviewed here will serve you well over the long term.
