This article will guide you through the process of selecting a stocks and shares Isa, covering our Recommended Providers, the lowest platforms, and investment techniques.

What are the finest stock and share ISAs, and how do I locate them?

A stocks and shares of the company Isa stands for Individual Savings Account, and it’s not an investment in and of itself; rather, it’s a form of account in which you can acquire tax-free returns on nearly any mix of investments, such as shares, funds, and bonds.

In contrast to cash Isas, stocks and shares Isas expose you to the possibility of having some of your money reduced to zero.

We have compiled a list of the most reputable institutions from which you may obtain a stocks and shares Isa, including both our Which? Recommended Providers and the most affordable investment platforms.

In addition, a video that is just two minutes long shows how to determine which stocks and shares ISA is the most suitable for you.

Have you depleted the funds in your Isa account?

Your Isa allowance for the tax year 2021–2022 is twenty thousand pounds. Your allowance is reduced proportionately for any contributions to a cash Isa that you make.

Remember that you can only open one cash Isa and one stocks and shares Isa in any tax year, but that you can have more than one of each type in total if you opened them in different tax years. This is an important fact to keep in mind because it limits the number of Isas you can have.

You are only permitted to make a contribution to one of each form of Isa throughout the course of the tax year. This means that even if you have two stocks and shares Isas open, you are only permitted to make a contribution to one of them.

You will be required to transfer your Isa before you may switch providers and then make additional contributions if you want to contribute more money.

Who are the Isa providers who offer the greatest stocks and shares?

AJ Bell Youinvest and Vanguard are both on our list of Recommended Providers for the 2021-22 fiscal year.

The overall satisfaction rating that a customer gave Vanguard was 77 percent, making it the best of the 11 providers that we considered. It only provides a small selection of its own funds, but the costs are really reasonable.
The overall score that customers gave AJ Bell Youinvest was 72 percent, which was good enough for second place. It provides access to a wider selection of investments, such as investment trusts and shares of publicly traded companies.

We polled over 2,000 users of investment platforms to get their feedback on the quality of service provided by their platforms. We supplemented those scores with an in-depth analysis performed by an expert on the costs incurred by various providers.

However, because expenses will always be a burden on your investment portfolio, the suggested service providers cannot be in the top three platforms in terms of prices, regardless of the size of the portfolios we analysed.

Who are the most cost-effective Isa providers for stocks and shares?

There can be significant variations in fees charged by various investment platforms, which can amount to tens or even hundreds of pounds over the course of a year.

A platforms charge a cost that is calculated as a percentage of the value of your portfolio, while others charge a flat rate, and still others charge a fee that is some combination of the two.

In general, percentage-based charges are more appropriate for portfolios with a value of less than £50,000, whilst flat costs are more appropriate for portfolios with a higher value. If you purchase and sell investments on a regular basis, you should look for a platform that has low or no fees associated with trading investments.

Isa costs for stocks and shares in comparison

The following table contains our best guesses regarding the costs involved in making a variety of investments on investment platforms over the course of one year.

We’re going to assume that you make four purchases and four sales every year, split up according to whether you’re investing in shares or funds.

The most expensive option is represented by a red colour, and the least expensive option is a dark green (cheapest).

Company £5,000 £10,000 £25,000

AJ Bell Youinvest

£25 £37 £75

Barclays Smart Investor 

£72 £72 £74


£20 £40 £100

Charles Stanley Direct

£18 £35 £88

Close Brothers

£13 £25 £63


£45 £35 £88

Halifax Share Dealing 

£112 £112 £112

HSBC InvestDirect

£13 £25 £63

Hargreaves Lansdown 

£23 £45 £113

Interactive Investor

£120 £120 £120


£8 £15 £38

All numbers are accurate as of April 2021. The number of trades is assumed to be quite low, at most one per month.
Not applicable to Sipps; only ordinary investment accounts and Isas are covered by this provision.

How can I put together a stocks and shares ISA that will perform well?

When investing in stocks and shares via an Isa, returns are never guaranteed, in contrast to cash Isas. You may, however, increase the likelihood that your investments will be successful if you take the following into consideration:

Your risk appetite

The bigger the return that is promised for a given investment, the larger the risks that are associated in making that investment.

Before you make any investments, you should be certain of your “risk appetite,” which refers to the amount of money you are willing to lose in the very worst-case situation.

Consider how long you have available to invest when determining your level of comfort with risk. When you invest for the longer term, you offer more risky investments more time to recover from setbacks. If you won’t be using the funds for more than five years, opening a savings account is the smarter financial move.

If you are confused about how much risk you are willing to take, read our guidance and think about having a conversation with a financial adviser.

Lump sum or regular contributions?

When you make a single investment of a large sum of money, you put that money to work for you and give it more time to develop.

The term “pound cost averaging” refers to the advantage that will accrue to your investment if you make consistent contributions.

In the event that the value of your investments drops during the course of the next month, you will be able to purchase additional units at the same price. You will be in a better position to profit from a subsequent increase in the value of investments if you have more units. It is also less dangerous to contribute consistently because a smaller portion of your money will be at risk in the event that your investments decline in value.


Diversifying your portfolio is one way to reduce the impact of any potential losses.

This necessitates holding a diverse portfolio of assets, preferably dispersed over a number of different fund managers and located in a variety of geographical areas.

You should also keep in mind that the Financial Services Compensation Scheme only covers up to £85,000 worth of investments on a single platform for protection against platform failure; if you have more than that in a stocks and shares Isa, you should think about shifting some of it into another Isa.

Which is better: shares, funds, or trusts?

Investing does not require you to choose specific shares of individual companies like it used to.

You are able to purchase shares in hundreds of firms all over the world through investment funds, which are also known as unit trusts and OEICs. The fees associated with these funds are becoming increasingly affordable.

There are also investment platforms that provide ready-made mixed funds for investors with a certain appetite for risk.

Investing in stocks and shares Isas can also be used to store life insurance policies, investment trusts, and corporate or government bonds (sometimes known as gilts).

Fund costs

When purchasing funds, be mindful of the associated fees.

Active funds, in which a fund manager chooses specific investments, typically have higher management fees, but there is no guarantee that these funds would provide better returns.

Funds that are considered passive (also known as tracker funds) invest in all of the companies that make up an index, such as the FTSE 100, or a representative fraction of those companies. They typically have more affordable prices. You may learn more about them by reading this article.

What steps should I take to evaluate my stocks and shares ISA?

After you have established your stocks and shares Isa, you may feel compelled to monitor it on a regular basis, especially now that so many online investment platforms provide mobile apps. Resist the need to do so, though.

You run the risk of being tempted to make changes to your portfolio if you do this, which is a potential downside.

If your initial portfolio was constructed on a solid basis, you should aim to keep it for the long term. Conducting annual reviews is the prudent way to reassess and make sure that your investments haven’t strayed too far from your desired asset allocation, and rebalancing if necessary is something you should do if you find that you need to.

After all, this is the kind of thing that a financial consultant would do for their clients.

If you trade too frequently, you run the risk of winding up with a list of haphazard assets rather than a portfolio that has been properly curated.

I already have an individual savings account for stocks and shares; may I transfer it?

Yes, although your existing service provider may charge you costs to “transfer out” of your account, so keep an eye out for those.

You can consolidate all of your investments from past years into a single account, making it much simpler to track and manage your financial holdings if you choose to switch to a different service provider and find one that meets your requirements.

This may take a few weeks, and depending on the circumstances, you may need to liquidate some investments in order to shift your money.