Fair Investment

Understanding the tax rules for ISAs

Understanding the tax rules for ISAs

There’s no doubt that the tax advantages of ISAs make them a compelling proposition for savers and investors. And you’re still in good time to open an ISA for this tax year.  It will help you decide between the different products available if you understand the basic rules of their tax structures.

What IS an ISA?

Put simply, Individual Savings Accounts (ISAs) are accounts you never pay tax on. They’re offered by banks, building societies, asset managers and the government-backed National Savings & Investments (NS&I).

The interest you earn doesn’t count towards your Personal Savings Allowance, so if it’s possible you could be earning a lot of interest, you can protect more of it in an ISA.

ISA earnings can range from 0.65% on an instant-access cash ISA that can be opened with just a £1 deposit, to 8% in a “structured deposit plan” cash ISA or up to 14.51% on a “structured investment plan” stocks and shares ISA.

Limits to how much you can put away

Accumulating those earnings tax-free is a considerable benefit, so there’s a limit to how much you can save or invest in a tax-free ISA “wrapper” each year: from the 2017/18 tax year the limit has been £20,000 a year.

You must save or invest before the end of each tax year on 5 April to get the tax-free benefit. And you can’t roll over any unused allowance to the following year.

So if you only put £12,000 into an ISA (or more than one type of ISA) in one year, the following year you can still only save or invest a maximum of £20,000 into ISAs – not £28,000.

Transfer to maximise earnings

If you want to transfer the balance out of an old ISA account into a higher-paying account, it won’t be counted as part of your current year’s ISA allowance.

Be sure to transfer the balance: don’t withdraw it in cash and then pay it in or you’ll be taking it out of its ISA wrapper and it will be counted as part of your annual £20,000 allowance (unless you have a “flexible” ISA). Instruct your new provider to transfer it over.

An administrative bonus: PAYE taxpayers still don’t have to fill out an annual tax return for their ISAs.

There are five types of ISAs:

Cash ISAs and Help to Buy ISAs

Cash ISAs

Save in a Cash ISA

Help to Buy ISAs

These were launched in December 2015 and are for first-time buyers only. They are a type of Cash ISA so you usually can’t hold both in the same tax year, but some providers do offer a “split ISA” package.



Junior ISAs

One Junior ISA per child can be opened by anyone who has parental responsibility for a child under the age of 18.

Open a Junior ISA

Stocks and Shares ISAs

You must be 18 or over to open an Investment (or Stocks and Shares) ISA.

Making your investments within an ISA “wrapper” has three tax advantages:

Invest in a Stocks and Shares ISA

Innovative Finance ISAs

You must be 18 or over to open a Peer to Peer (or Innovative Finance) ISA.

Invest in an Innovative Finance ISA

Lifetime ISAs

You must be over 18 but under 40 to open a Lifetime ISA (LISA).

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