skip to main content

Cash ISA Allowance

Cash ISA Allowance

For the 2017/18 tax year, the Cash ISA Allowance is £20,000.

An Individual Savings Account is one that allows an individual to save his/her money without taxing the returns on the cash or investment. The ISA is offered by the UK Government working with most banks and credit institutions. The requirement for an ISA is that you have to deposit or invest a certain amount of money into an account within a tax year. This amount that is to be deposited is the cash ISA allowance. The cash ISA allowance may from tax year to tax year but that does not affect the interest rates set by the bank or credit institution.

The amount that is to be deposited can be deposited into a number of multiple ISA accounts collectively, or into each account separately. The money can also be deposited all at once or over a period of time without any fixed charges on the deposit, depending on the type of ISA account.

The current cash ISA allowance is £20,000 for the 2017/18 tax year. The money is to be deposited by an individual, independent of any withstanding withdrawals on the account. If a withdrawal is made on any ISA, the payments on the ISA do not amount to the allowance. Instead, the deposited amount only goes to settle the withdrawal deficit. If however, the money is paid in excess, the excess amount can then be added up to the allowance.

The allowance highlights the maximum amount that an individual can save into an account. The savings do not necessarily have to be in cash; they can also be in form of share and stocks.

Account types and how they relate to an allowance

Basically, there are three ISA types that you can invest your money, shares or stocks into. These include:

  • Cash ISA
  • This is where the cash ISA allowance applies. The investment is made through cash deposited into the account. Investment returns on this account are never taxed.
  • Investment or innovative finance ISA
  • This is an account that allows for investment in stocks, shares or cash. A cash ISA allowance could apply in this account.
  • Shares or stocks ISA
  • In this ISA, investment is made in terms of stocks or shares. The amount of stock or share investment made must amount to the annual allowance limit. The shares or stocks are not made in cash terms but returns on investments are in cash.

Though the allowance is fixed for each individual and credit institution, the returns on investment vary depending on the bank's or credit institution's rates. The rates may also vary from one account type to the other.

High Income ISAs

High income ISA ideas:

ISAs Products

Cash ISAs

Fixed Rate & Instant Access ISAs:

Cash ISAs: 

Stocks & Shares ISAs

Types of Stocks and Shares ISA include: 

Stocks and Shares ISAs

Latest News

How much can I pay into an ISA?

21st March 2019

Each tax year, there's a limit set by the government to the amount you can save and invest in ISAs: your “annual ISA allowance”. The allowances are intended to reward savers and encourage us to invest more to support our future retirements, without creating a tax haven that can be taken advantage of by very wealthy individuals who just want to avoid paying tax.

Newsletter Signup

Sign up to our Newsletter to get exclusive news and offers direct to your inbox.

About us is a trading style of Fair Investment Company.

We've been comparing and recommending ISAs for many years so you can trust you're in good hands.

About us

4.89 Average

36 Reviews


I found the way the different options are presented very clear - much more useful than some other comparison sites. I sent it to my daughter as well.


Very informative, find myself a good ISA account with best return in terms of interest.


Easy to navigate, all required information was to hand. Professional looking site!

Jessica Esa has a really attractive and simplistic design. I've found it easier to use than other similar comparison sites. The products are simply described, it's informative and the pros and cons are really clear. Great website.


Easy to use website and up to date. Saved the link on my tablet.

Rob Holden

The website was very useful and informative.

Andrew Johnson

ISA can be confusing at first and this site includes a useful and helpful introduction into the world of ISAs


Excellent website - clear and helpful information about different products - and a trustworthy partner.


Quick and professional service provided


Very insightful and easy to navigate.. would recommend to anyone interested

Helen Belcher

Clear concise information that was easy to understand!


Easy to use website and up to date. Saved the link on my tablet.


simple, informative and clear - found what I was looking for straight away. Thank you.


Really simple to use and all the information was clear with lots of products available. The interest calculator was really handy too. Have bookmarked and will definitely use again.


Very helpful site for my investment isa

Hannah Gordon

This was a really user-friendly site, and was very helpful when it came to comparing accounts and choosing my 2016 ISA.


Easy to use website and up to date. Saved the link on my tablet.


If you wish to invest in an ISA this site has it all. A super comprehensive range of simply explained products from all the major companies.

Cristina Iacob

Very knowledgeble company with an extensive range of services, a great website with loads of useful information.

Jessica Morley

Really informative and easy to use site. Information is laid out very clearly and comparisons have all the plus & minuses I'm interested in, so makes me feel like I am making an informed decision. There was also a lot of additional information which would be incredibly helpful to someone completely new to ISAs who wanted to read up on the basics.

Sam H

excellent website, helped me to understand how i can get started with ISA's and helped me to narrow down great deals!


Nice graphics and easy to navigate

Dr Alan Rogan BSc PhD FCIOB FCABE Eur Ing

Good advice and professional approach


Very helpful for getting my annual ISA


Contemporary, easy to read and up to date.

Jonny Doulton

Clear, concise and very professional outfit with an excellent choice of market leading deals.


A very informative website, with lots of ideas to help make my choice.

Paul Tissington not only helped narrow down my choices for a Junior ISA but also provided additional practical information that helped demystify the whole process.

Sunil Karadia

Just the site I needed, I have been looking for a suitable ISA for a while, but as there are so many to choose from, find it difficult to find the right one for me.

James Weatheritt

I found the information on very helpful and easy to understand. The site is easy to navigate and find what you're looking for.

Lisa Holden

I found very insightful and easy to navigate through. The content was useful and helped me make my ISA decision.

Neta Pourhosseini

I thought the information provided was easy to understand and very informative, I would recommend to friends for deffinite.

Emma Caldwell

Found a good isa option for my son.

Robert Murray

Great selection of Isa products, useful information and a very user friendly site

Oliver Roylance-Smith

The place to go for all things ISA related. A great range of ideas for Cash and Investment ISAs. Easy to use.

J Caldwell

Very helpful site. Good range of options for my 2016/17 ISA.