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What's an ISA allowance?

How much money can you put in an ISA? With investment, your capital is at risk. Taxation depends on individual circumstances. ISA and tax rules may change.

Because of their generous tax benefits, the Government limits how much money you can put into ISAs. For the 2024/25 tax year the ISA allowance is a generous £20,000. You can split your allowance across a Stocks & Shares ISA and Cash ISA or invest it all in either one. The Junior ISA allowance for investing for children is £9,000.

Your ISA allowance resets every year

At the beginning of each new tax year your annual ISA allowance resets. You cannot carry your allowance over between years, so if you don’t use it you lose it. In April 2016 the Government made changes that allow you to take money out of your ISA and replace it in the same tax year without using up your allowance.

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Junior ISA allowance

This tax year you can pay up to £9,000 into a Junior ISA for a child. From age 16 a child can also have an adult cash ISA alongside their Junior ISA. They can still only keep £9,000 per tax year in the Junior ISA, but they could also save up to £20,000 extra in an adult cash ISA between age 16 and 18.

Find out more about Junior ISAs

Historical ISA allowances

The ISA and Junior ISA allowances are reviewed each tax year (which runs from 6 April to 5 April). This table shows how both allowances have changed over the last few tax years.

Tax year ISA allowance Junior ISA allowance
2014/2015 £15,000 £4,000
2015/2016 £15,240 £4,080
2016/2017 £15,240 £4,080
2017/2018 £20,000 £4,128
2018/2019 £20,000 £4,260
2019/2020 £20,000 £4,368
2020/2021 £20,000 £9,000
2021/2022 £20,000 £9,000
2022/2023 £20,000 £9,000
2023/2024 £20,000 £9,000
2024/2025 £20,000 £9,000

Speak to an expert about ISAs

Find out more about your ISA allowance and our award-winning Stocks & Shares ISA by speaking to our experts:

How Bestinvest can help

Looking for an efficient way to invest? Become a Bestinvestor with a Stocks & Shares ISA (Individual Savings Account) and save tax free.

Wondering what your ISA could be worth? Use our ISA calculator and stay on track the easy way.

Important Information

Tax and ISA rules may be subject to change from time to time

With investment, your capital is at risk.

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