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Stocks & shares ISAs

Learn more about ISA and investment platforms

Gavin Shepherd
Gavin Shepherd | Edited by Helen Saxon
Updated 26 September 2023

Every adult has a £20,000 ISA allowance for 2023/24 – but if you've not used it by 5 April, you lose it. And it's possible to use all or part of that ISA allowance to invest in the stock market. This guide runs through what you need to know before investing in a stocks & shares ISA. 

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Stocks & shares ISA platforms to try

There are no guarantees when you're investing

Investing comes with risk, as the value of your investments can go down as well as up. If you decide to do it, it's recommended you invest for the long term (five years or more), as the longer you invest, the longer you have to ride out any bumps in the market.

What is a stocks & shares ISA?

Everyone in the UK aged 18 or over has an annual ISA allowance – it's £20,000 for the 2023/24 tax year, which began on 6 April 2023 and ends on 5 April 2024.

You can use all or part of this ISA allowance to invest in a type of account called a stocks & shares ISA. Here, you can invest in funds (shares or bonds from various companies pooled into one investment), bonds (basically a loan to a company or a government), and shares in individual companies. The idea is that you don't pay dividend, capital gains or income tax on any gains or income from investments held in your stocks & shares ISA.

A stocks & shares ISA is very different from a cash ISA, which is just a savings account you never pay tax on. If this is your first experience of investing, read our Beginners' guide to investing to get a broader idea of what's involved.

Other MSE ISA guides...

Cash ISAs: All the best deals, plus help choosing.
Full ISA guide: For everything you need to know about ISAs. 
Lifetime ISAs: Get a 25% bonus on your savings.

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Stocks & shares ISA need-to-knows

  • 1. A cash ISA may be better if you want a short-term option and don't want to risk losing any money

    Whether a cash ISA or stocks & shares ISA is better for you depends on whether you're willing to risk your money investing and when you'll need access to the cash. In a nutshell:

    • Happy to risk losing money and don't need the cash for at least five years? Investing could be right for you, so consider a stocks & shares ISA.

    • Happy to risk losing money but need access sooner? Investing is for the long term, so a cash ISA would be best. If you can put some of your money away for at least five years, you could split it between a cash and a stocks & shares ISA.

    • Not happy to risk losing money? Stick to a cash ISA – though of course, if the interest rate's lower than inflation this could still mean you end up losing money in real terms.

  • 2. You should invest for the long term to ride out any bumps in the market

    Whether you should invest depends on your personal circumstances and the amount of risk you're willing to take. But as a rule of thumb, you should invest for at least five years. This allows enough time to ride out any bumps in the market that might see you make a loss on your money.

    As such, if you're looking to use your money within the next few years, you should probably stick to cash savings. See our Top Savings and Top Cash ISAs guides for more.

    It's important to understand that there's no such thing as the best stocks and shares investment. Over the long run, historically, stocks and shares have outperformed money in savings accounts. But that's no guarantee they'll do so in future. Always remember, investments can go down as well as up.

    The five golden rules of investing:

    1. The greater return you want, the more risk you'll usually have to accept.

    2. Don't put all your eggs in one basket. Try to invest in several different industries or countries – this is known as diversifying, and will help lower your risk exposure (the idea being that if one sector or country is doing badly, hopefully the others will do well and help keep the value of your stocks & shares ISA higher).

    3. If you're saving over the short term, it's wise not to take too much of a risk. It's recommended you invest for at least five years. If you can't, cash is often best.

    4. Review your portfolio. A fund might be a dud, a fund manager might leave, or you might not be willing to take as many risks as you once did. If you don't review your portfolio regularly, you could end up with a stocks & shares ISA losing money.

    5. Don't panic. Investments can go down as well as up. Don't be tempted to sell or buy funds just because everyone else is.

  • 3. You can invest in almost anything in a stocks & shares ISA but most investors stick to shares and funds

    There are many different types of investment...

    You can invest in almost anything – from the mainstream such as shares, bonds and funds to the more exotic, such as farmland, vintage cars and wine. However, the majority of investors stick to shares and funds.

    Here's how shares and funds work:

    • Shares. A share is simply a divided-up unit of the value of a company. For example, if a company is worth £100 million, and there are 50 million shares, each share is worth £2 (often listed as 200p). Those shares can, and do, go up and down in value for various reasons.

      Companies issue shares to raise money and investors (that's you) buy shares in businesses because they believe the company will do well and they want to 'share' in its success. See our Shares guide for a full rundown.

    • Funds. Usually, a fund is simply another way to buy shares. However, instead of you buying a slice of a company directly, you give your cash to a specialist manager who pools it with money from other investors to go and buy a job lot of shares in a stock market (ie, shares of lots of different companies). This makes it a bit less risky than investing in shares as you're sharing the risk with others, plus you're not just investing in one company.

      Each fund is made up of 'units' so if you want to invest, you'll need to buy units – and these come at a cost which varies from day to day. The value of each unit will rise or fall (or stay the same, of course) depending on demand in the market for the fund and how the underlying investments are doing. Here's an example to help...

      Say you want to invest £1,000 in a fund; if each fund unit costs £2, you can buy 500 units. Six months later, if each unit is now worth £2.50, your investment is worth £1,250. See our Funds guide for a full explanation.

      Why do some funds have a manager at the helm, while others don't?

      Funds can be active or passive:
    •     Active funds. An active fund is run by a fund manager who picks     what to put in the fund – the idea being that they'll use their     knowledge to beat the market's performance. Because you have an     expert at the helm, these funds usually charge higher fees as you're     paying for them to do their job.
    •     Passive funds. A passive fund hasn't got a fund manager.     Instead, the fund is invested in an index which follows the     performance of, say, the top 100 companies in the UK (this is known     as the FTSE 100).

      What are the different 'themes' funds are invested in?

      A fund's theme could be anything from:
    •     Geography. For example, European, Japanese, emerging markets.
    •     Industry. For example, green companies, utility firms, industrial     businesses. 
    •     Types of investment. For example, shares and corporate bonds.
    •     The size of the company. For example, a fund could be solely     focusing on smaller to medium-sized companies.

      The combination gives you the risk factor. If the fund focuses on "fledgling biotech companies in emerging markets", all the elements involve a high degree of uncertainty. So if it goes well, you could be in for massive gains, and if it goes badly, massive losses.

  • 4. The cheapest way to open a stocks & shares ISA is by going via a website often called 'a platform'

    You can buy stocks & shares ISAs from different providers such as banks and building societies, but the cheapest way to do it is through a website, often called a 'platform', so this guide is focusing on that.

    Investing in a stocks & shares ISA is a two-stage process:

    1. You first need to pick which provider to buy your ISA from. 
    2. Then you need to decide what investments to put in it.

    It's like buying bread in a supermarket. You first need to pick which shop you want to buy the bread from (decide which platform to use), then choose what bread you want to buy from there (your funds or any other type of investments).

    You'll be charged for using the platform AND buying/holding the funds. To stretch the analogy somewhat, imagine each supermarket charges a different price for its shopping bags.

    Some supermarkets sell bags more cheaply than others, but the ones that have the most expensive bags may be the ones that sell the bread the cheapest. So it's a combination of the two factors that needs to be taken into consideration.

    Note that while the platform fee is charged by the platform you choose, the company running the funds you choose will charge you for those.

  • 5. Any gains are tax-free in a stocks & shares ISA

    It's important you understand what the tax breaks are and whether they really matter to you before you decide to use your ISA allowance for investing...

    You DON'T pay any capital gains tax (CGT) on gains made within an ISA – great if you exceed the £6,000 annual CGT allowance

    CGT is a tax you have to pay on the gain you make when selling things such as shares, a second home (you usually don't pay capital gains on selling your main home) and jewellery.

    So if you buy shares at £1,000 and then sell them for £1,500, you've made a £500 gain. You might then have to pay tax on that. But it's important to understand that...

    You're allowed to make £6,000 of gains this tax year (2023/24) tax-free outside an ISA. So you would ONLY gain using a stocks & shares ISA in a year where you were making total gains over £6,000. (From April 2024 the threshold for paying tax on capital gains will be lowered to £3,000).

    If you have other capital gains, such as you had a buy-to-let property that you sold and made a profit on, you could have used up your CGT allowance that tax year. See our Tax Rates guide for info on the CGT rates you'll then pay.

    You DON'T have to pay tax on any dividend income on shares held in a stocks & shares ISA 

    There are two ways you make money from investing. One is when the shares increase in value and then you reap a nice little profit when you sell them. The other is when they pay dividends.

    Dividends are a bit like interest on a savings account. If a company makes a profit, it gives some of it back to you – it could be on a regular basis or as a one-off. And just as you have a personal savings allowance for interest on savings, you also have a dividend allowance each tax year where the first £1,000/year is tax-free. Earn more than this and you'd need to notify HM Revenue & Customs.

    Note: from April 2024, the dividend allowance will lower to £500/year.

    Any dividends received above this allowance will be taxed – at 8.75% for basic-rate taxpayers, 33.75% for higher-rate taxpayers and 39.35% for additional-rate taxpayers.

    However, dividend income received on shares held in a stocks & shares ISA is tax-free. (Older investors may remember when there was a 10% tax deducted from dividends at source which couldn't be reclaimed, which meant a stocks & shares ISA wasn't quite tax-free – this was abolished in April 2016.)

    You DON'T pay any income tax on interest from corporate bonds in an ISA

    With corporate bonds, instead of investing in a company's success, you're essentially lending money to it for a set time. In return, it'll have to pay you interest.

    It isn't risk-free, as there is the possibility it won't give you the money back and/or won't pay you interest. But the good news is...

    If you've got corporate bonds or bond funds within an ISA and they pay you interest, you don't have to pay any tax on it.

    If you're investing in corporate bonds outside a stocks & shares ISA, it'll fall under the remit of the personal savings allowance. This means basic-rate (20%) taxpayers will be able to earn £1,000 interest before having to pay tax on it, while higher-rate (40%) taxpayers will be able to earn £500 interest with no tax. Additional-rate (45%) taxpayers don't get a tax-free allowance.

    Bear in mind that this allowance covers your normal savings interest in a bank as well as other forms of interest. You'll owe tax on any interest earned above its limit.

  • 6. Your ISA allowance doesn't roll over into the next tax year – so use it or lose it!

    You must invest in your stocks & shares ISA by 5 April – the end of the tax year – for it to count for that year. Crucially, any unused allowance (£20,000 for 2023/24) doesn't roll over – so if you don't use it, you lose it forever.

    Any savings or investments that stay within the tax-free ISA 'wrapper' will continue to earn interest and reap the tax benefits until you withdraw the money.

    So it's possible to have substantial amounts invested within ISAs: over £200,000 since ISAs began in 1999 (though your total may be more or less depending on how your investments have performed).

  • 7. Both the platform and the funds you invest in will cost you money - so know what fees you're paying

    The platform AND the funds you invest in will have fees – investing always costs you money. The main charges to look out for are:

    • Platform charge. This is similar to having to buy a carrier bag from the supermarket: some charge you 50p for it and others charge you 10p. This can be a flat fee (best for high investors) or a percentage of the value of your funds (the larger your investments, the more it'll cost you).

    • Fund manager charge (also known as 'annual management charge'). You'll also be charged for everything you put in that bag – the funds you invest in. This is the charge by the actual manager of the fund held within your stocks & shares ISA. This is always a percentage of the amount you hold in that fund and can typically vary from 0.05% to 1%+ per fund, depending on the fund you're investing in.

    • Selling/buying funds and shares. This is the cost every time you buy or sell a fund or a shareholding on the platform. These can be anything from £0 to £25. If you'll just pick funds and stay invested in them, this likely won't matter too much. But if you're an active trader, looking for a low trading charge should be a high priority.

    • Transfer-out fee. The cost involved in moving your stocks & shares ISA from one platform (provider) to another. This is usually charged per fund, so the more funds you have within your stocks & shares ISA, the more it'll cost you.

      However, you usually have the option to sell your investments and transfer out as cash, and this is usually free to do, though you may pay the trading charge when you sell up.

  • 8. Like any other financial product, keep an eye on charges to make sure you're not overpaying

    Once you've got your head around the various charges, it'll be easier to work out whether a stocks & shares ISA provider may be overcharging you. Make a habit to check your fees and charges on a regular basis to make sure you're getting the best deal. 

    A platform might have been cheap at first, but new charging structures mean it may no longer be. Be sure to check any exit fees if you're looking to switch away, and if you won't take too much of a hit, in the long run it'll likely be cheaper to switch to a provider with lower fees.

  • 9. Investing on a regular basis can help smooth out any ups and downs in the stock market

    It's tempting to try to 'time the market', but it's almost impossible and even the most experienced investors get it wrong. By pulling out of the market as soon as a share dips or trying to second-guess when a share will reach its peak, you could lose out on sharp recoveries or see the price go down again.

    Instead, you should invest on a regular basis – in investment lingo this is called 'drip-feeding' – to smooth out any ups and downs. This will give you an added benefit of something called 'pound cost averaging'.

    This is how it works...

    If you invested a £10,000 lump sum and bought shares valued at £10 each, you'd have 1,000 shares.

    But if you bought £5,000 worth of the same shares each month over two months (amounting to 10,000 overall), you'd be buying 500 shares in the first month.

    However, if the share price fell to £9.50 in the second month, you'd be able to buy 526 shares, as the shares are at a lower price.

    So rather than your full £10,000 investment being affected by the drop in share price, only half of your money drops in value.

    In this example, a lump sum of £10,000 buys 1,000 shares, while two payments of £5,000 buys 1,026 shares. Smaller investing on a regular basis means any drop in share price won't be too noticeable.

  • 10. You can transfer to another stocks & shares ISA – just watch out for exit fees

    It may be the case that you already have a stocks & shares ISA you've been investing in and want to transfer to one of the platforms below to take advantage of lower charges. If so, make sure you take into consideration any exit fees from your existing platform before you transfer.

    If you do want to switch to one of the platforms below, you'll have to do an ISA transfer. Be aware however that the new platform may not offer all the investment options your previous platform did. So if there is a particular fund you like investing in, you'll have to weigh up whether it's better to stay with your existing platform that still offers it, or move to a new platform to take advantage of lower charges.

  • 11. If you're no longer willing to take a risk with your money, you can transfer your stocks & shares ISA into a cash ISA

    This may be useful for people coming up to retirement or anyone else who no longer wants to take a risk with their money.

    If you're going to do this you'll need to contact your new cash ISA provider and tell it you want to transfer money from your stocks & shares ISA. Never just withdraw the money – because if you do, you'll lose all the tax-free benefits.

    Once you've requested it, the transfer may take a few weeks. If you're opening a cash ISA with a different provider from where your stocks & shares ISA was, you'll likely pay a closing fee. If you're switching with the same provider, there usually won't be a fee.

  • 12. You usually WON'T be the legal owner if you buy shares through a platform

    Using a platform to buy your shares means that rather than directly purchasing the shares yourself, you pay the platform to buy them for you. This often comes with the benefit of being able to purchase fractions of shares, which you might otherwise have found too expensive to do.

    However, the shares are usually legally owned either by the platform itself or a nominee company, and you become what is known as a beneficiary owner.

    This means that, in the rare event of the platform collapsing, you wouldn't have ultimate control over your shares. In this case, your assets (for example: shares, funds) would either be transferred to another broker or sold and the cash returned to you.

    For this reason, most platforms keep your assets separate from theirs - known as ringfencing - so that, in theory, they wouldn't be able to touch them even if they went bankrupt.

Stocks & shares ISA platforms to try

Investing isn't MoneySavingExpert's area of expertise. So, we don't tell you here what the 'best' platform for you is, or give you any top picks. What we've done is pull out a mix of both cheaper platforms and well-known platforms for the two main types (DIY platforms and robo-investment platforms), so you have somewhere to start your own research in to which suits you best.

'Do-it-yourself' stocks & shares ISA platforms to try

With do-it-yourself platforms, you need to do your own research before deciding what to invest in, build your own portfolio and keep track of it. Make sure you take all charges into account – including any platform fees, fund charges, trading charges and exit fees.
 

We list these different costs, but we haven't taken fund charges into account. These will vary depending on which fund you pick and – to an extent – which fund platform you choose (some platforms negotiate deals with fund managers for cheaper fees).

The table below has some cheap platforms plus some big name players, so you can start your research. Keep an eye on charges as which works out cheapest for you will depend on what you invest in, how much you have to invest and how often you trade...

DIY stocks & shares ISA platforms

Platform + min deposit Cost Fee to buy/sell funds Fee to buy/sell shares (1) How to manage
InvestEngine* (min £100 plus newbies can get £10-£50 cashback) None None Can't buy shares Online/ app
Trading212* (min £1 plus newbies can get a free share with code MSE) (2) None  None None Online/ app
Freetrade* (min £2 or min £50 for a free share) £5.99/mth or £59.88/yr None None App
AJ Bell* (£500 or £25/mth) 0.25%/year £1.50 £9.95 Online/ app
Hargreaves Lansdown* (£100 or £25/mth) 0.45%/year None £11.95 Online/ app
Not a platform (it only sells its own funds) but can be a low-cost option. 
Vanguard (£500 or £100/mth) 0.15%/year None Can't buy shares Online/ app

(1) Fees based on up to 10 trades of UK shares per month, AJ Bell and Hargreaves Lansdown offer discounted rates for more frequent trades. You can trade overseas shares but expect to pay a currency exchange fee of up to 1%. (2) Min £10 for deposits via bank transfer or min £1 via card. Deposits by card are fee-free up to £2,000, there's a 0.7% fee above.

Robo-adviser stocks & shares ISA providers to try

If you go for a robo-adviser then it will choose an investment portfolio for you, based on your attitude to risk and what your investment goals are.

In general, these platforms won't be the cheapest, as they're doing all the work for you. But, often costs are kept relatively low as they tend to invest in funds which have low management charges. 

There are many robo-advisers out there who can help you with a stocks & shares ISA, so always do your own research. Though to help you on your way, we've provided a mix of cheap and well-known platforms in the table below.

Robo stocks & shares ISA platforms

Platform + min deposit Management fee (1) Average annual fund cost (2) How to manage
InvestEngine* (min £100 plus newbies can get £10-£50 cashback) 0.25%/year 0.23% Online/ app
Wealthify* (min £1) No management fee in year 1 for newbies via our link, then 0.6%/year 0.16% or 0.7% Online/ app
Moneyfarm* (min £500)

No management fee in year 1 for newbies via our link, then tiered: 0.6%-0.75%/yr

 

 0.3% Online/ app
Nutmeg* (min £500) No management fee in year 1 for newbies via our link, then tiered: 0.45%-0.75%/year.
 0.25%-0.4% Online/ app

Correct as of 5 September 2023. (1) Management fees based on investments of up to £100,000, there's a lower fee for larger amounts with Nutmeg and Moneyfarm. (2) Total cost comprises fund charges + market spread.

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Get free research to help choose a fund

We don't cover what to invest in because we never want to have told you to put your money in something, only for you to lose money on it – though these sites do:

  • Hargreaves Lansdown – helpful and easy-to-navigate site, including a 'Wealth Shortlist' – a collection of funds selected for their performance potential.
  • Interactive Investor – includes beginners' guides, a glossary of terms and tables showing the 10 top, bottom and most-traded funds via its platform each month. 
  • Bestinvest – a large range of free guides covering everything from how to spot the worst-performing funds, to the top-rated funds.
  • Charles Stanley Direct – the market data section breaks down lists of FTSE companies and allows you to check performance for any time period from one day to three years, updated every 15 minutes.

Want help investing?

If you're not sure how to invest and what to invest in, seek independent financial advice. Read our Financial Advisers guide for more information.

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