Green and ‘sustainable’ funds are now mainstream across most DIY investment platforms – the harder part is working out which options are genuinely aligned with your values (and transparent about how they invest), and which are mostly marketing. Platform charges matter too: over time, fees can make a bigger dent in returns than many investors expect.
A stocks and shares ISA lets you invest tax-free up to the annual ISA allowance (£20,000 in the 2025/26 tax year), and you have until 5 April 2026 to use this year’s allowance. You can also invest up to £9,000 a year into a Junior ISA (JISA) for a child under 18.
To get started, you simply open an account online with your chosen platform, add money either as a lump sum or regular contribution, and select the funds or ready-made portfolios you want to invest in.
Here are seven platforms where you can go green with your Stocks and Shares ISA (listed alphabetically):
AJ Bell
Annual fee: 0.25% (shares account charge capped at £3.50 per month; fund charges tiered)
Minimum investment: £25 per month or £250 lump sum
AJ Bell is a well-established DIY platform that’s particularly popular with investors who like to choose their own funds and keep costs competitive.
You’ll find a wide range of funds, ETFs and shares, including many responsible and sustainable investment options. Its platform charge for Stocks and Shares ISAs is 0.25 per cent, with the custody fee for shares capped at £3.50 per month. Fund holdings are charged 0.25 per cent on the first £250,000, falling to 0.10 per cent on the next £250,000 and zero above that.
As well as Stocks and Shares ISAs, AJ Bell also offers a Self-Invested Personal Pension (SIPP), Lifetime ISA, Junior ISA and dealing account – – useful if you like keeping your investments under one roof.
The Big Exchange
Annual fee: 0.25% service/administration fee (plus underlying fund manager charges)
Minimum investment: £25 per month or £100 lump sum
Co-founded by The Big Issue, The Big Exchange only lists funds designed to deliver a positive environmental or social impact.
Funds are rated against the UN Sustainable Development Goals (“Global Goals”), with each awarded a gold, silver or bronze rating depending on the level of impact they’re aiming to achieve. This makes it easier for investors to quickly see how their money could be making a difference – and to focus on the issues they care about most.
You can start investing from £25 a month or a £100 lump sum, making it one of the more accessible impact-focused platforms.
Hargreaves Lansdown
Annual fee: 0.35 per cent (from March 2026)
Minimum investment: Varies depending on investment type
Hargreaves Lansdown (HL) is the UK’s largest DIY investment platform, offering a huge range of funds and research tools alongside a growing selection of responsible investment options.
From March 2026 its annual account charge on Stocks and Shares ISAs will fall from 0.45 per cent to 0.35 per cent on the first £250,000 of investments.
HL’s curated fund lists and detailed research can be particularly useful if you want guidance and analysis while still making your own investment decisions.
Interactive Investor
Annual fee: Flat monthly subscription (plan pricing varies)
Minimum investment: £25 per month or any lump sum
Interactive Investor (ii) uses a subscription model rather than charging a percentage of your portfolio. This means it can become better value as your investments grow, although smaller portfolios may find percentage-based platforms cheaper.
The platform offers screening tools and curated lists of ethical and sustainable investments designed to help you filter options based on your priorities – whether that’s avoiding fossil fuels or backing companies with strong social policies.
Because ii’s pricing depends on the plan you choose and can change periodically, it’s worth checking the latest costs before opening an account.
Simply EQ
Annual fee: Tiered portfolio fee (for example around 0.75% on lower balances, reducing at higher values)
Minimum investment: £250 per month or a £1,000 lump sum
Simply EQ is an online and phone-based investment service from Good With Money ‘Good Egg’ company EQ Investors, offering ready-made portfolios focused on sustainability and long-term positive impact.
Investors can choose between portfolios such as Positive Impact, Future Leaders , Blended Worlds or Sustainable World, each designed to combine financial returns with environmental and social considerations.
It’s more of a managed service than a DIY platform, which may suit investors who want professional oversight rather than selecting funds themselves.
Triodos Bank
Annual fee: 0.40% on investments up to £250,000; 0.20% above that
Minimum investment: Typically £25 per month or £250 lump sum
Triodos is widely seen as a pioneer in ethical and sustainable banking.
Its Stocks and Shares ISA offers access to a small, focused range of impact-led funds: the Triodos Global Equities Impact Fund, Triodos Pioneer Impact Fund, Triodos Sterling Bond Impact Fund and the Triodos Future Generations Fund.
This more concentrated approach can appeal to investors who want their money directed into clearly defined impact strategies.
Find out more about Good With Money ‘Good Egg’ company Triodos here.
Top platforms for your green IFISA
Best apps:
Wealthify
Annual fee: 0.6 per cent. There is also a 0.7 per cent fund fee for the ethical plan (compared to 0.16 per cent for original plans).
Minimum investment: An initial investment of at least £1,000, then from £1 per month for most accounts
Wealthify is a robo-adviser offering ready-made investment portfolios, including a dedicated range of Ethical Plans across different risk levels.
The platform charges a 0.6 per cent annual management fee, with underlying fund and trading costs applied within each portfolio. Ethical Plans include funds designed to avoid certain sectors while investing in companies with stronger ESG credentials.
Its app-based approach and managed portfolios make it a straightforward option for newer investors who want a hands-off way to invest sustainably.
