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Monzo investment platform review
Low-cost investing for both large and small portfolios
Digital bank Monzo’s investment platform offers existing customers access to BlackRock funds and ETFs within a stocks and shares Isa, general investment account or Sipp.
You can get started investing in Monzo with just £1.
Please note that this article is for information purposes only and doesn't constitute advice. Please refer to the particular T&Cs of an investment platform before committing to any financial products.
Does Monzo offer the best stocks and shares Isa?
Monzo
Monzo's customers rated it an above-average 72%. We were impressed by its low fees (scoring them 76%) but gave Monzo's limited choice of assets 0%.
With just three mutual funds and 11 ETFs, Monzo won't be suitable for anyone who wants to invest directly in shares or has their own investment plans that don't involve BlackRock funds.
But, if you're a complete beginner, you might find Monzo an easier place to start. Customers rated the ease-of-use highly, and it picked up a perfect five-star rating.
It's one of the cheapest options for investing in funds if you have less have £25,000 to put in your Isa. And because of its £250 annual cap, it's also one of the cheapest if you have more than £250,000.
If you're a member of one of Monzo's premium plans, you'll save on investment fees. However, the savings aren't huge and aren't enough to make it cheaper to sign up for a premium plan.
You must have a Monzo bank account to use its investment service, but that will mean your money is all accessible in one place.
What do customers say about Monzo?
Monzo customers scored it 72%, the ninth-highest score of any platform in our survey.
Comments from Monzo customers who took part in our survey include:
‘Its simplicity and user-friendly app interface make it easy for beginner investors or existing Monzo customers to manage their banking and investments in one place.'
‘I am very satisfied with the service because before I started with them I didn't know anything about stocks and shares, but due to the way they break it down for me, it was very easy for me to cope.'
'It’s simple, convenient, and integrated into the Monzo app, making it easy to invest with minimal effort.'
Visit Monzo to find out more about its accounts, services and investment options.
Monzo 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. Monzo results based on sample size of 61.
Is Monzo safe?
Monzo is regulated by the Financial Conduct Authority and covered by the Financial Services Compensation Scheme (FSCS).
If Monzo 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 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).
