ISA Allowances Explained: How Much You Can Invest in 2024

Individual Savings Accounts, or ISAs, are one of the most effective ways to save and invest your money. Offering a series of tax-free benefits, there’s no better way to ensure that you’re getting the most out of the money you add to your savings account. However, with allowances creating limits on the money you can put into an ISA, this form of investment isn’t as simple as saving as you go. 

In the United Kingdom today, more than 22 million adults have an ISA, with plenty of children under the age of 18 also holding their own Junior Individual Savings Accounts, or JISAs, for short. 

There are many different types of ISA available, with the most common two being Cash ISAs and Stocks and Shares ISAs. However, savers can also access Lifetime ISAs and Innovative Finance ISAs. 

Cash ISAs work like most other savings accounts, where individuals can either invest their money at a fixed interest rate over a set period or with a variable rate that can change depending on the bank or building society that they’re saving with. 

Unlike Cash ISAs, a Stocks and Shares ISA allows you to make investments without having to pay any income tax or capital gains tax on profits made. Here, you can invest in several different assets like stocks, bonds, investment funds, ETFs, or unit trusts. 

Elsewhere, Lifetime ISAs can be a great way to save for your first home or retirement, and it’s possible to hold both cash and investments within them tax-free. Innovative Finance ISAs are a relatively new type of savings account that offers different investment tools like peer-to-peer loans instead of cash, or stocks and shares. 

What is an ISA Allowance?

If you’re a little confused about managing your ISA allowance, don’t worry, even the most experienced of investors can struggle with the mental arithmetic involved with keeping on top of how much they can pay into their account. 

An Individual Savings Account may be an excellent vehicle to help you build a nest egg completely tax-free, but your savings have to remain within a specific limit throughout a tax year. 

The time frame is always over the annual period between April 6th to April 5th, and many savers like to maximize their tax-free savings by reaching their limit before time runs out and their allowance refreshes for the new tax year. 

The 2024/2025 ISA allowance is £20,000. This means that you can invest precisely £20,000 tax-free for the current tax year before the 5th of April when the financial year ends and a new tax year, equipped with a new allowance, begins. 

Each tax year, ISA allowances are liable to change, so it’s worth keeping this in mind as you’re saving. However, the current ISA allowance of £20,000 has remained in place since the 2017/2018 tax year, and generally speaking, ISA allowances increase over time. 

Back in the tax year 1999/2000, ISA allowances were limited to just £7,000, with only £3,000 permitted for Cash ISAs. Since then, allowances have steadily increased, rising to £15,000 in 2014/2015, and £20,000 for 2017/2018 where it’s remained. 

This could mean that we’ll see another allowance rise in the future, but for now, a £20,000 limit remains in place. 

How Allowances Differ Between ISA Types

Although the £20,000 allowance is in place for Cash ISAs, Stocks and Shares ISAs, and Innovative Finance ISAs, the allowance isn’t consistent across every form of Individual Savings Account. 

If you’re building a Lifetime ISA, your allowance is limited to £4,000 per tax year, but you’ll need to make your first payment before your 40th birthday. You’re also unable to pay into a Lifetime ISA beyond the age of 50. 

Likewise, Junior ISAs have a lower annual allowance of £9,000 per year. However, parents paying into Junior ISAs can do so safely in the knowledge that these savings won’t conflict with their other existing ISA allowances. 

Allowances are Split Across ISAs

If you have more than one ISA, your annual allowance applies to all of your savings accounts combined, meaning that you couldn’t contribute £20,000 to your Cash ISA and another £20,000 to your Stocks and Shares ISA, for instance. 

Instead, if you’re seeking to contribute to multiple ISAs, you could pay £6,000 into your Stocks and Shares ISA, £10,000 into your Cash ISA, and then max out your £4,000 Lifetime ISA allowance for the best tax-free savings. 

Getting The Most From Your ISA

If you’re saving using at least one ISA, you can benefit from building an excellent tax-free pot of cash for a rainy day, a major one-off purchase, or later in life without having to pay out on capital gains or other taxes that could eat into your savings. 

To get the most out of your Individual Savings Account, be sure to use as much of your allowance each year as possible because it doesn’t carry over to the next year. For many of us, £20,000 is a significant amount to invest each year, so don’t worry if you’re unable to reach this total. 

Everybody gets their own ISA allowance, so if you’re married or cohabitating, you and your partner are free to save £20,000 each year to further boost your household savings. 

With more than 22 million people in the UK enjoying the tax-free benefits of ISAs, it’s clear that there are very few more effective ways to invest with little associated risk. By using the annual allowances to your advantage, you can build a healthy nest egg for whenever it’s needed at a pace that suits your needs.