ISAs vs savings accounts: differences and benefits explained

Saving money is an achievement. Even putting small amounts aside is a step in the right direction. But it can also bring up questions – like where should you put your money? 

If you’ve done any research on this, two options tend to come up a lot: ISAs and savings accounts. Both can help you grow your savings, but they work in slightly different ways. 

An ISA (which stands for Individual Savings Account) is actually a type of savings account as well, but the key difference is to do with tax. 

In this guide, we'll walk you through what makes each of these two options unique, what benefits they offer, and how to decide which one's right for you.

The pros of ISAs

An ISA is a tax-efficient way to save or invest your money. The government sets a limit on how much you can put in across all your ISAs each year – currently £20,000 for the 2026/27 tax year. Any interest you earn or investment gains you make within an ISA are completely free from UK income tax and capital gains tax. That means your money can grow without HMRC taking a cut.

There are different kinds of ISAs to suit different goals:

• Cash ISAs work like regular savings accounts but with tax-free interest. 

• Stocks and Shares ISAs are a tax-free account designed for long-term investing. The value of your investments could go up or down and you could get back less than you put in.

• Junior ISAs are designed for children, giving parents and guardians a tax-efficient way to save for their child's future. They are available as both Cash ISAs and Stocks and Shares ISAs, and the total annual limit for Junior ISAs is £9,000.

One important thing to remember: only one person can pay into an adult ISA. So if you're thinking about saving as a couple, you'd need to open separate ISAs rather than combining your contributions into one account.

Check out our online guide for all you need to know about ISAs.

What do savings accounts have to offer?

A savings account is exactly what it sounds like – a place to keep money you don't need right away, where it can earn interest. Unlike ISAs, there's usually no annual limit on how much you can deposit, though some accounts do have monthly or total contribution limits, as well as restrictions on how much you can take out – so it's worth checking the small print before you commit.

The catch is that savings accounts aren't tax-exempt like ISAs. So if you're putting away larger amounts and earning significant interest, you might end up paying tax on those gains, which can eat into how much you end up saving over time. 

Some people can earn some interest tax-free in a savings account thanks to something called the Personal Savings Allowance. If you're a basic rate taxpayer, you can earn up to £1,000 a year in interest before paying tax. Higher rate taxpayers get a £500 allowance. Additional rate taxpayers don't get any allowance at all, so all their interest is taxable.

Unlike ISAs, savings accounts are available as joint accounts so more than one person can contribute. This makes them handy for couples or families who want to save together for a shared goal. And because many savings accounts give you instant access to your money, they're a good option if you want flexibility without locking your cash away.

Savings accounts vs ISAs

Here's a quick summary of those main differences:

Which account is right for me?

Both ISAs and savings accounts have their place. Cash ISAs can give you tax-free returns, which means you won’t pay tax on the interest as your savings grow. That can make them a good option for longer-term goals or larger balances, especially if your interest might go over your Personal Savings Allowance.

Savings accounts offer more flexibility: there are joint accounts and often no annual limits. Thanks to the Personal Savings Allowance, some people won’t pay tax on their interest.

But a Cash ISA can still be worth considering, even if you're just starting to save money and your current interest is below the Personal Savings Allowance. Any interest earned inside an ISA stays tax-free – so as you save more money over time, you won't need to worry about paying tax on it later. The more you save, the more likely it is that savings interest will be subject to tax in future if it's not in an ISA.

Before making any big decisions, it might be worth chatting with a financial adviser who can look at your specific situation.

Apply for a Monzo Savings Account or ISA

The taxes you pay depend on your circumstances and could change in the future. Monzo current account required. UK residents only. Ts&Cs apply. You need to be 18+ to apply for a Cash ISA or Stocks & Shares ISA. 

The value of your investments in a Stocks & Shares ISA could go up or down and you could get back less than you put in.

Questions? Answers.

Is a Cash ISA or a savings account better?

It depends on your circumstances. If you're saving larger amounts (that would earn over £1,000 in interest for basic rate taxpayers, or £500 for higher rate taxpayers), a Cash ISA's tax-free benefits become more valuable. For smaller amounts within your Personal Savings Allowance, a regular savings account can work just as well. 

Can I have an  ISA and a savings account?

Absolutely! There's nothing stopping you from having both. Many people use Cash ISAs for their short-term savings goals and keep a savings account for emergency funds. It's all about finding the right balance for your individual situation.

Is an ISA or a savings account better for couples?

For couples, it can be a bit of both. Each person can have their own Cash ISA (with a £20,000 annual allowance per person), but you can't have a joint ISA. 

If you want to save together in one account, a joint savings account is your main option. Many couples use a combination – individual ISAs for tax-efficient saving, plus a joint savings account for shared expenses or goals.

Should I get an ISA or a savings account for my home deposit?

If you're buying your first home and you're under 40, a Lifetime ISA could be worth looking at – you get a 25% government bonus on contributions up to £4,000 a year. However there are other restrictions which you can read about in our Lifetime ISA guide. For other situations, either could work. 

An ISA can be good if you're saving a larger amount and want tax-free growth. A savings account with instant access gives you flexibility if your house-buying timeline changes. Think about how soon you'll need the money and whether you're comfortable with any withdrawal restrictions.