Nutty

Stocks and Shares ISA calculator

Find out how much your Stocks and Shares ISA could be worth in the future.

Current ISA savings
Monthly contributions

Yearly contributions

£2,400

Duration
5 years
Increases annually by
5%

(the average is roughly 5%)

Estimated ISA value in 5 years

£14,384

Your contributions £12,000

It could increase by £2,384

Not sure which Stocks and Shares ISA to get?

Find the best option for you with our comparison of all the top Stocks and Shares ISAs.

Best Stocks and Shares ISAs

Your estimated Stocks and Shares ISA value per year

Year Total added ISA value
0 £2,400 £2,450
1 £4,800 £4,950
2 £7,200 £7,500
3 £9,600 £10,050

Updated
13 October, 2024

Our Stocks and Shares ISA calculator assumptions

Our Nuts About Money Stocks and Shares ISA calculator is here to help you plan your investment savings for the future – it shows how much your total savings could be worth, depending on how much you want to save (per month), and your estimated investment return (average percentage increase over the years).

Stocks and Shares ISA calculator

As part of our calculations we’ve included compounding (compound interest). This works annually, and means the money you make from your investments, essentially begins to make money itself too – and this snowballs over and over, and over the years turns very small amounts into huge amounts. Einstein actually called this the 8th wonder of the world.

Compound interest graph

You can save up to £20,000 per year into a Stocks and Shares ISA (well, a total across all your ISAs), so we’ve set the annual limit to £20,000, which is £1,667 per month.

Our Stocks and Shares ISA calculator allows you to save for up to 40 years – eventually you’d probably want to spend the money, but if you want to save for longer, maybe for retirement, check out our pension calculator.

Pension calculator

And as Stocks and Shares ISAs are tax-free, we haven’t included any tax payments in the calculations (all of the above is explained below).

Not sure what something means?

Current ISA savings

This is how much you’ve got in your Stocks and Shares ISA account already.

Monthly contributions

This is how much you are intending to save per month into your Stocks and Shares ISA.

The most you can save into an ISA is £20,000 per year, so you’re able to save £1,667 per month.

ISA allowance

Nuts About Money tip: if you’re planning to save more, and thinking about retirement, a pension can be a great idea, use our pension calculator to learn more and plan ahead. You can also invest more into a regular investing account, where you’ll pay tax on your profit.

Duration

This is how long you intend to keep your savings for – and you can save up to 40 years with our Stocks and Shares ISA calculator. If you’re intending to save for longer, such as for retirement, you might want to consider a personal pension (they’ve got great tax-free savings benefits too).

Investment growth rate

This is how much you’ll expect your money to grow each year (as an average).

As a guide, 5% per year is seen as a middle of the range forecast, 8% on the higher end and 3% on the low end (these are guidelines set by the Financial Conduct Authority (FCA), who are the people who look after financial companies).

Financial Conduct Authority (FCA)

What is a Stocks and Shares ISA?

A Stocks and Shares ISA is where your money is invested in, you guessed it, stocks and shares, with the aim of growing your money over time. And it’s all tax-free.

Paying and not paying tax

If done right, they’re not as complicated or risky as they might seem, and can significantly increase your savings over time, potentially much more than interest from a cash savings account – and you can simply let the experts handle the investments (meaning you don't need to know much about investing).

Shares represent part ownership of a company (you own a share of a company), and they have a value (e.g. £100), and when a company does well and grows, this value can increase (e.g. to £150), and therefore your investment increases.

Stocks and Shares

Most investment strategies would include owning thousands of different shares (companies), often by being invested in what’s called a fund, which is a large group of shares or similar kind of investments to shares (like loans to governments called bonds).

Investment fund

This reduces a lot of the risk of your money falling in value significantly, and helps your money grow over time. Depending on how much it grows will usually depend on the level of risk you’re happy with, and the type of investment you’d like.

Your money will always go up and down day-to-day, but over time (e.g. over 5 years or more), and with the right investment strategy, it would typically grow fairly significantly (although there’s never any guarantees).

Stocks and Shares ISA

You can simply leave the experts to manage the investment side of things with a managed Stocks and Shares ISA (recommended), and leave your money to grow over time.

Expert-managed platforms

Or, if you’re more confident with investing, you can manage your own investments within a self-managed ISA.

Nuts About Money tip: for all the top options for Stocks and Shares ISA, head over to our best investment platforms table.

Saving for your first home?

If you’re saving for your first home, you could consider a Lifetime ISA instead of, or alongside a Stocks and Shares ISA.

A Lifetime ISA, or LISA, is a government scheme to help you save your first home, although they can also be used for later in life if you don’t want to use it for your first home (after 60 years old).

How to use your Lifetime ISA

With a LISA, you can save up to £4,000 per tax year (April 6th to April 5th the following year), and you'll benefit from a massive 25% bonus from the government on everything you save into it, so up to £1,000 free each year.

Lifetime ISA (LISA)

Your money will grow tax-free, so there’s no tax to worry about either, so it can grow much more over time.

You can use the money towards your first home, as long as you’re a first time buyer (so haven’t bought a home before), and the property has to be under £450,000. You also have to live in it (so not a buy to let).

However, there are some rules to open one, you need to be at least 18 years old, and be under 40. You can also only save into one until you’re 50.

And if you don’t end up using your LISA for your home, if you want to withdraw your money from your account, you’ll face a hefty 25% fee, which works out as more than the 25% bonus (it sounds odd, but the maths works out). Or, you can wait until you’re 60 years old, when there’s no penalty fee.

Nuts About Money tip: check out our Lifetime ISA calculator to plan your LISA savings.

Saving for retirement?

If you’re saving for retirement, you also might not want to use a Stocks and Shares ISA… 

You also have the option of a pension, which you’ll likely be familiar with if you have a job, but you can also save into your own pension, called a personal pension, alongside your pension from work.

With these, you’ll automatically get a 25% government bonus on everything you save into one, which is to refund tax you’ve paid on your income (at 20% tax rate), called tax relief.

Personal pension tax relief

And if you earn over £50,270, meaning you pay 40% or 45% tax on some of your income, you’ll also get this tax back too (which you do by claiming on a Self Assessment tax return).

Higher and additional rate tax relief

Your money grows tax-free too, and when it comes time to retire and withdrawing from it, you can withdraw 25% completely tax free (as long as the 25% is under £268,275).

You can save up to £60,000 per year, or up to your total income each year (e.g. your salary), whichever is lower, as a total across all your pensions.

And, they don’t count towards any Inheritance Tax that might be paid when you sadly pass away.

Inheritance tax

Anyway, we won’t go into all the details right now, but you can learn more with our guide personal pensions, or if you’re keen to get started, here’s our guide to the best private pensions. Oh, and try our pension calculator too.

Written by

Christopher Dowling
Christopher Dowling
Editor-in-Chief

Christopher Dowling combines a communications degree with over 10 years experience in the financial services industry in London – with focus on educating people on a wide range of money topics in an easy to understand way. He writes about savings, investing, pensions, mortgages, insurance, banking, loans, business finance and other money topics.

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