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Interactive Investor offers a range of accounts including stocks and shares Isas, general investment accounts, Sipps and junior Isas.
It has acquired several other platforms in recent years, including Alliance Trust Savings, The Share Centre and Equiniti (formerly Selftrade). In 2022, Interactive Investor was bought by global investment company Abrdn.
Please note that the information in this article is for information purposes only and does not constitute advice. Please refer to the particular terms and conditions of an investment platform before committing to any financial products.
Does Interactive Investor offer the best stocks and shares Isa?
Interactive Investor
We scored Interactive Investor very highly for its choice of assets (75%), but were less impressed by its fees (45%, below average). Its customers gave it a score of 71%, which was average.
If you're thinking of using Interactive Investor to take an income from your pension in a drawdown plan, read our comparison of pension drawdown plans and charges.
This applies to each trade of investments denominated in another currency, for example US stocks, on top of fund and trading charges.
0.75% of the value of the trade on the Core plan
0.75% up to £50,000 and 0.25% on any amount above that on the Plus plan
0.25% on the Premium plan
The amount of cash interest Interactive Investor pays on uninvested cash in your stocks and shares Isa depends on how much you have.
1.11% AER on first £20,000
1.26% AER on amounts between £20,000 to £50,000
1.36% AER on amounts between £50,000 and £100,000
2.12% AER on over £100,000
'Fixed-fee investing isn't best for everyone'
Megan Thomas, Which? investments writer, says:
Whether Interactive Investor is a good platform for your Isa will likely hinge on its fee structure. Instead of paying a proportion of your investments in fees, you'll pay a fixed fee every month, which depends on what plan you're on.
For investors with lots of money in their Isa, this is great value. But if you have £25,000 or less in investments, Interactive Investor is one of the most expensive platforms you could find.
That could be worth it if you're an adventurous investor. Interactive Investor had around 18,000 assets available when we checked – the second-most of any in our survey.
It also provides a large amount of educational material and a specialist list of recommended sustainable funds, named ACE40. It chooses the best-performing ethical funds and classifies them into whether they ‘avoid’ certain industries like mining or tobacco, ‘consider' ESG factors, or ‘embrace’ companies focused on delivering positive social or environmental impact.
What do customers say about Interactive Investor?
Interactive Investor customers scored it 71%, the twelfth-highest score of any platform in our survey.
Comments from customers who took part in our survey include:
‘Using the platform is straightforward. The range of investment options is great. I like the fact that the platform charges a flat monthly fee rather than a percentage fee, which makes it cheaper than many of its competitors.'
'Interactive Investor charges reasonable fees (although these have just been increased) and is quite easy to use. Negatives are that fund prices are not very quick to update, and fund transactions can take several days to complete. Also, it is not straightforward to find a history of your transactions in a particular fund.'
'It broadly does exactly what it says on the tin and is very helpful in keeping track of all aspects of running the portfolio, particularly in providing a paper trail. Their service levels can get overwhelmed at times of high market turmoil. Portfolio analysis tools are not exceptional. In the recent past, they have ramped up their fees sharply - it's still good value for me, but it sounds a warning note that I may need to consider moving.'
Visit Interactive Investor to find out more about its accounts, services and investment options.
Interactive Investor customer scores in more detail
Aspect of service
Star rating
Customer service
★★★☆☆
Ease of use
★★★★☆
Information on investments
★★☆☆☆
Value for money
★★★☆☆
These results are based on a January 2026 online survey of 3,053 adults – members of the Which? Connect panel and members of the public – who told us about 4,146 experiences with stocks and shares Isas. Interactive Investor results based on sample size of 421.
Is Interactive Investor safe?
Interactive Investor is regulated by the Financial Conduct Authority and covered by the Financial Services Compensation Scheme (FSCS).
If Interactive Investor went bust and its other arrangements to protect your money failed, the FSCS will cover up to £85,000 of investments per person, per platform. You can claim for free online at www.fscs.org.uk: there's no reason to use a claims management company.
Our overall score is based on a combination of customer score, fees score, and assets score.
We don't analyse the performance of investments listed by investment platforms, as different investors will opt for different investments.
Customer score and ratings
We surveyed 3,053 investors – members of the Which? Connect panel and of the public – who gave 4,146 reviews of stocks and shares Isas in January 2026.
Each platform must get at least 30 responses to receive a customer score, which is based on overall satisfaction and likelihood to recommend.
The customer score makes up 60% of the overall score.
We also ask investors to rate their current platform for customer service, ease of use, information on investments, and value for money.
Fees score
The fees score uses snapshots of account and transaction fees at £5,000, £10,000, £25,000, £50,000, £100,000, £250,000, and £500,000. The fees assume four purchases and four sales in a year, spaced out in across months.
Fees are weighted higher closer to £50,000 as this is close to the average portfolio size, according to HMRC data.
The scores are assigned relative to the cheapest platform which would receive a score of 100%.
The fees score makes up 30% of the overall score.
Assets score
The assets score adds together all of the assets available within a stocks and shares Isa and assigns a score relative to the maximum out of the providers which receives 100%.
The assets score makes up 10% of the overall score.
To be considered to be a Which? Recommended Provider (WRP), the platform needs to have an overall score of 70% or higher.
Companies that reach this score are excluded if they're among the top 25% of the most expensive platforms across our scenarios, based on our fees analysis. Platforms are not eligible for WRP status if they receive a two-star rating or lower in any of our categories.
We also apply statistical tests that place the platforms into ‘bands’. Only the platforms in the highest two bands – the ones that really stand out – can be a WRP.
We will not give Which? Recommended Provider status to platforms that offer CFD trading.
To be eligible for our Great Value recommendation, platforms must be in our top three customer score bands and among the 25% least expensive in the asset categories they offer (any combination of funds, shares, or ETFs).
