Stocks & shares ISAs

This question is usually a proxy for 'should I save or invest?'.

If you're putting money away that you don't need to access for the long term, say over 5 years, then on the balance of probability, investing in a broad spread of investments will usually substantially outperform savings. So in that case, a shares ISA wins.

To stay less risky - best for most general investors - use that to buy funds, not individual shares (where the risks & rewards are magnified), eg, tracker funds which track the performance of indices such as the FTSE 100 (the UK's biggest shares) or the S&P 500 (biggest US shares).

Cash ISAs are for storing money you may need to access in the shorter term - whether to build up an emergency fund, save for a house, or for a rainy day fund. Or if you're older, when people tend to de-risk.

Of course, there is risk when it comes to investing. There are no guarantees. That's why it's best over a longer period (when short term market fluctuations, like those we're seeing right now, can smooth out) and with a spread across diverse assets (which also smooths the risk), so...

Investing is best if you've cleared expensive debt, have an emergency savings fund and won’t need access to the money for at least five years.

Of course, many people already invest via their pension, but it is also a good idea to have some general investments too, if your finances allow, and Shares ISAs are a strong option. With these you can choose an enormous range of UK and worldwide investments - shares, funds, gilts, bonds and more. After all, an ISA is just a wrapper - what you put in it dictates the returns.

Whether investing is right for you depends on your circumstances and how comfortable you are with ups and downs. The key rule of thumb is time: investing is best suited to money you won’t need for at least five years, giving markets time to recover from short-term falls.

If you’re likely to need the money sooner, cash savings are usually more appropriate – See our Top Savings and Top Cash ISAs guides.

Over the long run, stocks and shares have historically tended to outperform cash savings, helping money grow faster than inflation. But there are no guarantees, and values can fall as well as rise – especially in the short term.

The five golden rules of investing:

1. Higher potential returns usually mean higher risk. There’s no free lunch. Growth comes with volatility.

2. Spread your risk. Don’t put all your money in one place. Investing across different companies, sectors and countries (diversification) helps reduce the impact of any single poor performer.

3. Match risk to your timeframe. The shorter your timescale, the less risk you should take. If you can’t invest for five years or more, cash is often the safer option.

4. Review, but don’t panic. Check in periodically to make sure your investments still suit your goals and risk appetite. Don't be tempted to sell or buy funds because of short-term volatility.

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.

What is an exchange-traded fund (ETF)?

An ETF is typically a passively-managed fund invested across a sector or market index. They are designed so the performance of the fund tracks the performance of that index. They can be traded on stock exchanges throughout the day, just like shares.

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.

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 £3,000 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 £3,000 of gains this tax year (2025/26) 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 £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 £500/year is tax-free. Earn more than this and you'd need to notify HM Revenue & Customs.

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.

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 2025/26) 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).

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.

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.

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.

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.

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.

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.