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Individual Savings Accounts, more commonly known as ISAs, are a tax-free way of saving brought in by the UK Government in 1999 to replace Personal Equity Plans (PEPs) and Tax-Exempt Special Savings Accounts (TESSAs).
There are four main types of ISA available:
Cash ISAs are perhaps most similar to traditional savings accounts and come in different varieties:
You’ll also find Junior ISAs (JISAs) available to those under the age of 18.
Any UK citizen over the age of 18 can open an ISA; this includes crown servants, members of the Armed Forces, overseas diplomats and civil servants, as well as their spouse or civil partner.
As for those under the age of 18, parents and guardians can open a JISA on behalf of a child, while 16- and 17-year-olds can apply for an account themselves.
After opening an ISA, any returns received from funds held in the account are automatically exempt from taxation. This is in contrast to traditional savings accounts which may require you to pay tax on interest earned depending on whether you exceed your Personal Savings Allowance (PSA).
However, you must bear in mind the annual ISA allowance.
The annual ISA allowance is the maximum amount you can deposit into an ISA or across multiple ISAs within the tax year. As of the 2024/25 tax year, this threshold stands at £20,000.
Each tax year, your allowance will reset. This means when the new tax year begins on 6 April 2025, you’ll receive a fresh ISA allowance of £20,000 to allocate.
‘Subscribing’ simply means to pay into an ISA, and the subscription limit is the maximum amount you can deposit into an account each year.
Cash ISAs, Stocks and Shares ISAs and Innovative Finance ISAs can all receive up to the maximum combined allowance of £20,000. Meanwhile, Junior ISAs and Lifetime ISAs have a smaller subscription limit of £9,000 and £4,000, respectively.
The Autumn Budget 2024 confirmed the annual ISA allowance will remain at £20,000 until 5 April 2030. Meanwhile, subscription limits for Junior ISAs and Lifetime ISAs will also be maintained at their current levels until the same date.
As of 6 April 2024, you can open and pay into multiple of the same type of ISA within a single tax-year. This is a deviation from previous rules which stipulated you could only subscribe to one of each of the four main types of ISA in a tax-year.
For instance, you could open two or more cash ISAs to save towards different goals, so long as your total deposits don’t exceed the annual ISA allowance. Alternatively, you could use multiple Stocks and Shares ISAs with different providers to potentially gain access to a wider range of investment opportunities.
Importantly, it should be noted this rule doesn't apply to Lifetime ISAs and Junior ISAs; you can still only pay into one of each type of these accounts in the same tax-year.
You can split your annual ISA allowance any number of ways across the various types of ISA, providing you don’t exceed the £20,000 yearly limit.
For example, you could choose to save half of your allowance (£10,000) in cash ISAs, invest £6,000 in Stocks and Shares ISAs and put away £4,000 in a Lifetime ISA.
That being said, you’re under no obligation to split the allowance; you could also deposit the full £20,000 into a single account should you wish.
Whether you can pay into an ISA every month will depend on the type of account you hold. Regular savings cash ISAs, for example, are specifically designed for monthly contributions.
While many variable rate cash ISAs, such as easy access and notice ISAs, will also allow for further deposits, some fixed rate accounts may prohibit you from making additions to your initial deposit.
You can check whether an ISA accepts further additions by clicking ‘view further details’ next to an account in any of our ISA charts.
While easy access and fixed rate ISAs are both types of cash ISAs, there are some differences to be aware of when deciding which account to open:
Easy access cash ISA | Fixed rate cash ISA | |
Interest rate | Offer variable interest rates that can go up or down with little warning. | Pay a fixed rate that is guaranteed not to change over the duration of a term. |
Withdrawals | Permit access to your cash without restriction (although some accounts may impose a lower rate for exceeding a certain number of withdrawals within a given period). |
While withdrawals are often prohibited, some accounts permit early access subject to a loss of interest penalty and/or account closure. |
Additions | Accept further deposits at any time. | If an account accepts further additions, this is often only for a short window of time after opening. |
Generally speaking, an easy access cash ISA may be better suited if you regularly find yourself dipping into your savings pot, or if it’s likely you’ll need access to your cash at short notice (such as in an emergency).
In contrast, a fixed rate cash ISA may be preferred by those with a longer-term savings goal, who want guaranteed returns and are willing to lock away their cash.
Like fixed bonds, most fixed ISAs prohibit withdrawals. However, some allow access to the money in your account before the term ends. This is known as ‘early access’ and often incurs a loss of interest penalty and/or account closure.
There are a few options as to what happens when a fixed ISA term comes to an end; your provider should be in contact prior to your account maturing to explain your choices. This could include:
If you don’t take any action, your funds will usually be automatically redeposited into an instant access cash ISA, at which point you could choose to transfer it to another provider.
If you’re open to investing, you could consider a Stocks and Shares ISA. Over the long run, these accounts offer the potential for greater growth, although it’s crucial to remember your capital is at risk and returns are never guaranteed.
Whether you choose to manage your own investments, have a financial adviser or fund manager oversee a portfolio on your behalf or use a platform, there are plenty of investment opportunities to choose from.
Depending on your personal beliefs, you can also invest ethically in environmentally friendly businesses, those that promote human rights and seek to limit human suffering.
While most ISAs have a range of uses, Lifetime ISAs (LISAs) are purpose-built for saving a deposit for a first home or putting away money for retirement. These accounts come in two forms: either a cash LISA or a Stocks and Shares LISA.
In contrast to other types of ISA, the Government applies a 25% bonus on deposits up to £4,000 a year made into a LISA – a welcome boost to prospective buyers or those looking ahead to retirement. However, whereas most ISAs are available to any UK citizen over the age of 18, LISAs can only be opened by those aged 18 to 39.
Perhaps the least well-known of the four main types of ISA, Innovative Finance ISAs (IFISAs) facilitate peer-to-peer lending. Instead of going through a third-party (such as a bank), this is where your funds are lent out directly to borrowers.
An ideal outcome is that your investment is returned in full – plus interest - by the end of the agreed term, but this isn’t always guaranteed. For this reason, the Financial Conduct Authority (FCA) considers investments held in IFISAs to pose a high risk and, what’s more, they may not be protected by the Financial Services Compensation Scheme (FSCS).
It’s sometimes (but not always) the case that cash ISAs pay lower interest rates than their more traditional counterparts. There are a few possible explanations as to why this is:
Despite this, an ISA could still be more cost-effective if it’s likely you’ll pay tax on the interest earned from a traditional savings account.
Related guide: Cash ISA or savings account: Which should I choose?
Whether the interest rate paid by a cash ISA will respond to wider market conditions depends on the type of account.
Variable rate cash ISAs, such as easy access, notice and some regular savings ISAs, are particularly susceptible to the current economic climate, and any changes to the Bank of England base rate can quickly see returns rise or fall.
Although providers also usually factor market forecasts into their fixed ISA pricing, remember the interest rate you receive won’t change over the course of the term.
Related guide: UK base rate explained – and how to respond to changes
While returns on ISAs don’t track the rate of inflation, they can still be used to prevent it eroding the purchasing power of your money (i.e. how much your money can buy).
Good practice is to regularly review your savings portfolio; if an account offers less than the rate of inflation, your money is losing value in real terms, and it may be worth switching to a higher-paying alternative.
ISA transfers make it simple to switch between providers without losing your tax-free benefits.
There’s no limit on the number of times you can transfer from one account to another, but bear in mind while a provider must allow transfers out, they are under no obligation to accept transfers in.
Before making the switch, it’s therefore important to check which types of ISA (if any) your prospective provider accepts transfers in from. To do so, click ‘view further details’ next to a listing on any of our ISA charts. Alternatively, you can change your investment type to ‘ISA transfer’ by selecting ‘full search’.
There are no universal restrictions when it comes to transferring between different types of ISAs as it’s at a provider’s discretion which accounts they accept transfers from. The only exceptions are Junior ISAs; these accounts can only be transferred to another Junior ISA.
Keep in mind, fees sometimes apply when transferring between two different types of ISA. If you transfer a Lifetime ISA to a cash ISA, for instance, this will usually incur a 25% penalty. Similarly, a loss of interest penalty may be imposed for transferring out a fixed rate ISA, as this could be seen as accessing your cash before the term ends.
The best type of ISA will depend on your personal circumstances, such as the amount of access you need to your cash, your savings goals and your attitude towards risk.
Those looking for guaranteed returns may prefer a cash ISA – with easy access cash ISAs offering the most flexibility when it comes to making further additions and withdrawals.
If you’re saving towards buying your first home or for your retirement, meanwhile, a Lifetime ISA is specifically designed to help meet these goals.
Otherwise, those looking for an investment opportunity and who are willing to put their capital at risk could consider a stocks and shares ISA.
The vast majority of ISAs have no upper age restriction; one exception is the Lifetime ISA, which can only be opened by those under the age of 40.
If you’re aged over 60, this means there are still plenty of competitive ISAs to consider. A good option will be that which offers the best returns on your hard-earned cash while meeting any other requirements you may have of the account.
You can open an ISA at any time, but you need to consider how much you have deposited in ISAs in the current tax-year. If you have used up your annual ISA allowance, you won’t be able to open another ISA until the new tax-year starts and your allowance resets. But, if you want to change accounts or move providers, you may be able to transfer your ISA instead of opening a new one.
You may see more attractive deals on offer towards the end of a fiscal year (5 April) as providers seek custom from savers looking to use up their annual allowance, in a phenomenon known as ISA season.
This trend typically continues into the new tax-year (from 6 April), with providers aware customers have a fresh allowance to distribute. Nevertheless, this doesn’t prevent banks and building societies from increasing rates at other times of the year, either in response to changes to the Bank of England base rate or as they look to raise funds, gain new customers and meet targets.
It’s good practice to regularly review the top ISA rates and consider switching to a new account if you find more competitive returns available.
The amount of protection your funds are afforded depends on the type of ISA your money is held in. As with traditional savings accounts, the Financial Services Compensation Scheme (FSCS) protects balances of up to £85,000 in most cash ISAs (although it’s important to remember this limit covers any funds held with providers that operate under the same banking licence).
Similarly, investments of up to £85,000 in a stocks and shares ISA are protected by the FSCS should your provider go bust. It’s important to note this protection doesn’t cover any losses made on your investment.
Equally, returns aren’t guaranteed with an IFISA either. As a form of peer-to-peer lending (P2P), your funds won’t be protected by the FSCS if your provider were to collapse.
Read our guide on FSCS protection to learn more; for more information on providers that share a banking licence, you can also check out our guide to who owns whom.
If you’ve paid the maximum amount into ISAs this tax-year, there are other options you could consider to continue saving tax-efficiently.
Yes – the annual allowance resets at the start of each new tax-year (6 April), meaning you can save up to £20,000 in ISAs every year.
No, it’s not possible to open a joint ISA. Instead, couples wanting to make the most of tax-free allowances could consider spreading their savings across separate accounts.
Parents and guardians can open a Junior ISA on behalf of a child under the age of 18, so long as both are UK residents. Alternatively, teens aged 16 and 17 can apply for their own account.
No, you can’t open an ISA for someone else unless you’re a parent or guardian setting up an account for a child under the age of 18, or if you have a Power of Attorney (PoA).
An ISA could form part of your later-life savings – particularly if you want more flexibility in accessing your cash. Unlike pensions, there are typically no minimum age restrictions to draw upon the money in your account (although some may impose penalties for exceeding a given number of withdrawals or for removing funds before a term ends).
However, pensions are generally considered the more tax-efficient choice. What’s more, if you’re an employee of a company and enrolled in a workplace pension, you’ll receive employer contributions to your retirement pot.
Related guide: Should I invest in an ISA or my pension?
Only a spouse or civil partner can inherit savings in an ISA without it impacting the tax-free status or their annual allowance. This is enabled by an Additional Permitted Subscription (APS) – an extra allowance equivalent to that held in your ISA/s at the time of passing.
If you want to name another beneficiary to receive your ISA savings, bear in mind this will form part of your estate and may be liable to Inheritance Tax.
Related guide: The rules on inheriting ISAs
While you won’t be taxed on withdrawals from an ISA, bear in mind if you deposit the funds into an interest-earning account and you breach your Personal Savings Allowance, you will then need to pay tax.
You must inform your provider if you move abroad, but don’t worry - your ISA will stay open and continue to earn tax-free returns. While you’ll no longer be able to contribute to the account, you still have the option to transfer it to another provider should you wish.
You can resume paying into the account if you return to and remain a citizen of the UK.
No, you can’t hold foreign currency in an ISA. However, you may be able to hold foreign investments with a Stocks and Shares ISA.