Best Cash ISAs UK in 2025

Are you looking to make the most of your savings? There are ways you can make the most of your spare money beyond just a standard savings account.

An Individual Savings Account (ISA) lets you earn tax-free interest on your savings. There are four main types, each with its own benefits: cash, stocks and shares, innovative finance ISA, and lifetime ISAs.

You can usually open a cash ISA if you're aged 16 or over and a UK resident. In this article, we'll explore cash ISAs and introduce you to the best ones.

Provider	Score	Details
1. Tembo Money Cash ISA	★★★★★	Learn more
2. Charter Savings Bank Easy Access Cash ISA	★★★★★	Learn more
3. Kent Reliance Easy Access Cash ISA	★★★★★	Learn more
4. Hargreaves Lansdown Cash ISA	★★★★★	Learn more
5. Chip Cash ISA	★★★★★	Learn more
6. Shawbrook Bank 1 Year Fixed Rate Cash ISA	★★★★★	Learn more
7. Moneybox Cash ISA	★★★★★	Learn more
8. Cynergy Bank Online ISA Access Account	★★★★★	Learn more
9. Virgin Money Defined Access Cash E-ISA	★★★★★	Learn more
10. Zopa Access Smart ISA	★★★★★	Learn more
11. Principality Building Society Online Bonus ISA	★★★★★	Learn more

What Is a Cash ISA?

A cash ISA is a type of savings account that offers tax-free interest. By contrast, with a standard savings account, you might have to pay income tax on the interest you earn if you exceed your personal savings allowance. This is £1,000 per tax year for basic rate taxpayers, and £500 a year for higher rate taxpayers.

Going over this allowance is more likely now that interest rates have risen. But if you save in a cash ISA, you won't need to pay tax on any of the interest you earn.

You can only open one cash ISA in a tax year, which runs from 6 April to 5 April. However, you can transfer your cash ISA to another provider during the same tax year.

For the 2023/24 tax year, you can pay up to £20,000 into a cash ISA. This allowance resets at the start of the new tax year and can be spread across the four different types of ISA. Some cash ISAs are flexible, which means that if you withdraw money from your cash ISA and replace it again within the same tax year, it won't affect your ISA allowance.

If you've got more than one ISA, you can combine them into one new ISA. Using an ISA transfer service to make the switch will prevent any money you've saved from previous tax years from counting towards your current tax-free allowance. Just check whether the ISA you're transferring to allows transfers in.

There are two types of cash ISAs:

• Fixed-rate cash ISAs: You'll need to lock away your money for a fixed term but you'll get a fixed interest rate in return. You can't access your cash during this period without paying a hefty penalty fee. You won't usually be able to top up your funds after the initial deposit either. Fixed terms often range from one to five years.
• Easy access cash ISAs: You can access the funds within the account at any time, as well as pay into the account whenever you want to, as long as you don't exceed your annual allowance. Easy access cash ISAs are sometimes known as instant access cash ISAs. Interest rates are usually variable.

Cash ISA rates will vary from ISA provider and ISA type. The Annual Equivalent Rate (AER) determines the interest rate if the interest was paid and compounded once annually. You will want to look around for the best cash ISA rates.

Read More: The Best Cash ISA Rates for Over 60s in the UK

Cash ISA: Pros and Cons

We've compiled a list of all the pros and cons of opening a cash ISA.

Pros	Cons
✔️ Tax-free savings: You won't pay tax on any interest earned in a cash ISA, no matter how much this is.	❌️ Not all cash ISAs allow transfers in: Some providers won't accept transfers in from other ISAs, so be sure to check.
✔️ No risks: Most, if not all, cash ISAs are protected by the Financial Services Compensation Scheme (FSCS). Plus, unlike stocks and shares ISAs, there's no risk your investment will go down.	❌️ Funds are locked away: If you choose a fixed-rate cash ISA, you won't be able to withdraw money from the account as it is locked away for the agreed fixed term.
✔️ Transferrable: You can switch your cash ISA to another provider anytime during the tax year.	❌️ Limited ISA allowance: The annual ISA allowance is £20,000, so you're limited on how much interest you can earn.
✔️ Some cash ISAs are flexible: This means you can withdraw funds and pay them back in within the same tax year, without this affecting your annual allowance.

Best Cash ISAs — Reviews

We've included easy access and fixed-rate cash ISAs in our list of best cash ISAs.

1. Tembo Money Cash ISA

Tembo Money began as a mortgage broker and has gained recognition as the UK's Best Mortgage Broker for three consecutive years.

In 2024, Tembo branched out into Savings products and expanded its offerings with the introduction of a competitive Lifetime ISA, designed to help customers save for their first home or retirement with a 25% government bonus.  Building on this success, the company launched the Tembo Cash ISA in 2025.  This tax-free savings product allows individuals to save up to £20,000 annually, earning 4.8% AER (variable) interest with unlimited same-day withdrawals.

The Tembo Money Cash ISA has a number of strong points in its favor:

Note that Tembo Money does not use introductory rates.  That means that unlike many of their competitors, Tembo Money's interest rate does NOT drop after an initial period of time to a lower tier – you get the banner rate (variable) for the life of the ISA.  This makes them a strong choice over much of the competition.

Interest accumulates daily and is paid into your account every month, which can be tracked through the Tembo Money app, and you can open an account in minutes with just £10.

All funds are protected by the Financial Services Compensation Scheme (FSCS) and held securely with partner banks Barclays and Bank of Scotland.

Tembo Money's Cash ISA is a fantastic choice for savers seeking a simple, high-yield, and flexible solution to meet their financial goals.  Whether you're saving for a first home, an emergency fund, or any other life event, this product provides an excellent way to grow your savings while benefiting from award-winning mortgage advice — all fee-free.

2. Charter Savings Bank Easy Access Cash ISA

This cash ISA from Charter Savings Bank pays a great rate of interest and you can access your money whenever you want to.

Transfers in from other ISAs are permitted and you can choose whether you want to have your interest paid annually or monthly.

3. Kent Reliance Easy Access Cash ISA

This is another account that pays 4.56% AER on balances of £1,000 or more. If your balance drops below this, your rate will fall to 0.10% AER.

As this is an easy-access account, you can withdraw your money whenever you want to and you can also add to your funds up to the £20,000 annual allowance. The account can be managed online or in the branch. If you want to transfer in funds from other ISAs, this must be done within 30 days of opening the account.

4. Hargreaves Lansdown Cash ISA

Hargreaves Lansdown's Cash ISA provides an innovative and user-friendly platform where you can access competitive interest rates through a range of online banking partners. Notably, you have the flexibility to switch between offers from these partners seamlessly, facilitating optimal returns without the hassle of managing multiple accounts.

The account offers easy access products with top rates, with its highest paying offering paying 4.55% AER currently. You can contribute anywhere from £1 to £20,000 within the current tax year, and it allows for the transfer of existing ISAs. All management of the account is conducted online, ensuring convenience.

This unique ability to switch between competitors with Hargreaves Lansdown's Cash ISA without the hassle of closing and opening new accounts is a significant convenience, streamlining your financial management and enhancing your ability to adapt to changing market conditions.

5. Chip Cash ISA

First on our list of the best cash ISAs or individual savings accounts is Chip. Its highly competitive 4.85% AER is available to customers and allows you to earn monthly interest on a tax-free basis. So you'll not need to pay tax on your earnings.

You'll be able to gain instant access to your cash. We found that withdrawing money will not affect the annual ISA allowance Chip offers you when you replace the money in the same tax year.

This easy-access cash ISA offers convenience. However, keep in mind that to use this account, you mustn't have paid funds into a different type of ISA within the same tax year as stated by ISA rules and regulations

Unlike fixed-rate ISAs, we found that Chip uses a variable rate, meaning your cash ISA rate will move according to the Bank of England base rate. You will receive a higher rate when the base rate increases.

You'll get a lower rate when the base rate decreases. We found that this differs from fixed-rate cash ISAS, which pays a fixed amount of interest regardless of the base rate.

With Chip, we noticed your eligible deposits gain protection from the Financial Services Compensation Scheme (FSCS). This benefit means that any savings up to £85,000 remain safe even if the Chip financial institution fails.

You will have a maximum of £20,000 over the many types of ISA, including stocks and shares ISAs. However, once the new tax year arrives, Chip will offer you a new £20,000 ISA allowance.

6. Shawbrook Bank 1 Year Fixed Rate Cash ISA

This is another competitive one-year fixed-rate cash ISA from Shawbrook bank, but you'll need to pay in at least £1,000 to open it. Applications can only be made online, and you must be at least 18 years old to open the account. Once opened, you can manage your account online or over the phone.

If you make any withdrawals during the one-year term, you'll be charged 90 days' interest. Transfers from other ISAs are permitted.

7. Moneybox Cash ISA

The Moneybox bank cash ISA offers a competitive 5.00% AER, which includes a 12-month bonus of 0.55% – after this time, the rate will drop. The account requires a minimum balance of £500. If your account balance falls below £500, a lower interest rate of 0.75% AER will be applied.

However, unlike most instant access accounts, you can only make up to three withdrawals from the ISA every 12 months without impacting the rate. If you make four or more withdrawals from the cash ISA, a lower interest rate of 0.75% will be applied.

You can only access the ISA via mobile banking, but the app is available on the Apple App Store and Google Play Store. You can open a cash ISA within minutes on the app; download it and deposit the initial £500 to get started. In-app, you can transfer any other ISAs with other providers into a Moneybox cash ISA.

8. Cynergy Bank Online ISA Access Account

The Cynergy Bank Online ISA only requires a £1 opening deposit and pays a competitive rate of 4.50% AER. No bonus is included so the rate won't suddenly drop off after a year, but remember it is variable so could change. You can access your funds whenever you want to, penalty-free.

You can only apply and manage your cash ISA online and will automatically be enrolled to use the online banking services. You can only transfer in ISAs when you first open the account, and all external withdrawals are paid to your nominated account.

The account isn't flexible, so whatever you withdraw, you can't put it back in during the tax year.

9. Virgin Money Defined Access Cash E-ISA

Virgin Money Defined Access Cash ISA pays a competitive 4.51% AER (variable). There is no minimum amount required to open and maintain this account.

However, that variable rate only holds for the first 3 withdrawals, after which it drops to 1.25%. So this is a good choice if you know you can leave the money mostly untouched. Otherwise, you might want to look at other products, such as their 1 year fixed rate cash ISA, which currently offers a 4.10% fixed rate.

You must be a UK resident aged 18 or over. UK residents who are 16 or 17 and already have a fixed rate Cash ISA with Virgin Money will be allowed to select an appropriate Cash ISA to reinvest their funds into at maturity.

You can withdraw money using your internet or mobile banking, by calling, writing or talking visiting a Store.

10. Zopa Access Smart ISA

Zopa bank cash ISA works a little differently. You'll have one flexible cash ISA, but within that you can spread your ISA allowance across different pots. You can choose access ISA pots that let you access your money when you need to, or fixed term ISA deposits, that let you lock away funds for one to five years.

Zopa's Access ISA allows you to withdraw money whenever you need to, and you can pay it back as many times as you want within the same tax year without affecting your ISA allowance.

You can access your cash ISAs via the Smart Savings Hub, allowing you to add and manage your ISA pots from your smartphone. The Smart Savings Hub has multiple tools to help you grow your savings.

11. Principality Building Society Online Bonus ISA

The Principality Building Society's Online Bonus ISA pays 4.70% AER for the first 12 months. This rate includes a 1.55% bonus, so the rate drops to 3.15% AER after that period. If this means your account is no longer competitive, you might need to switch to a new one.

You can pay in from £1 to £20,000 in the current tax year and transfer in any existing ISAs. You can close or transfer the account anytime to get a cash ISA elsewhere. You can make withdrawals at any time.

As the ISA is flexible, you can take money out and put cash in within the same tax year. You must open and manage the ISA online.

Leading Cash ISAs: The Verdict

A cash ISA is a great way to earn interest on your savings without worrying about paying tax on it. This is particularly beneficial when interest rates are high, as you're more likely to exceed your personal savings allowance with a standard savings account.

With the right ISA provider, you can choose whether you want to lock away your funds in return for a fixed rate of interest or have the flexibility of accessing your funds when needed.