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Tools / Savings / Junior ISA Calculator

Simply input your initial investment, monthly contributions, expected annual interest rate, and your child’s current age to see how much their savings could grow by age 18.

The child’s age is used to calculate the number of years until the child turns 18.
year

The annual contribution limit for a Junior ISA is £9,000, which equates to £750 per month.
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Future Value
£25,816.12
The results provided by this calculator are estimates only. Actual investment returns can vary due to market conditions, fees and charges, and other factors. The information provided should not be considered financial advice. For personalized financial planning, please consult a qualified financial advisor.
Future value:£25,816.12
The results provided by this calculator are estimates only. Actual investment returns can vary due to market conditions, fees and charges, and other factors. The information provided should not be considered financial advice. For personalized financial planning, please consult a qualified financial advisor.

Summary

When your child is 18, their Junior ISA could be worth£25,816.12
You started with£0.00
Your total contributions over 18 years will be£21,600.00
The estimated growth is£6,553.96
Fees-£2,337.84

This table below shows the breakdown for each year.

YearStarting balanceContributionsInterestFeesEnding balance
0£0.00£0.00£0.00£0.00£0.00
1£0.00£1,200.00£16.64£12.17£1,204.47
2£1,204.47£1,200.00£53.28£24.58£2,433.17
3£2,433.17£1,200.00£90.65£37.24£3,686.58
4£3,686.58£1,200.00£128.77£50.15£4,965.20
5£4,965.20£1,200.00£167.66£63.33£6,269.53
6£6,269.53£1,200.00£207.34£76.77£7,600.10
7£7,600.10£1,200.00£247.81£90.48£8,957.43
8£8,957.43£1,200.00£289.09£104.47£10,342.05
9£10,342.05£1,200.00£331.21£118.73£11,754.53
10£11,754.53£1,200.00£374.16£133.29£13,195.40
11£13,195.40£1,200.00£417.99£148.13£14,665.26
12£14,665.26£1,200.00£462.69£163.28£16,164.67
13£16,164.67£1,200.00£508.30£178.73£17,694.24
14£17,694.24£1,200.00£554.83£194.49£19,254.58
15£19,254.58£1,200.00£602.29£210.57£20,846.30
16£20,846.30£1,200.00£650.70£226.97£22,470.03
17£22,470.03£1,200.00£700.09£243.70£24,126.42
18£24,126.42£1,200.00£750.47£260.77£25,816.12

Frequently Asked Questions

What is a Junior ISA?
A Junior Individual Savings Account (ISA) is a long-term, tax-free savings account for children under 18 in the UK.
How does the calculator estimate future value?
The calculator estimates the future value by considering the initial investment, regular monthly contributions, the expected annual interest rate, and the number of years until the child turns 18. It assumes interest is compounded monthly.
How accurate are the results?
This calculator provides estimates based on your inputs and assumed constant interest rates. It is intended for informational purposes only and does not constitute financial advice. Actual investment returns can vary due to market conditions, fees and charges and other factors. For personalized financial planning, please consult a qualified financial advisor.
What is the annual contribution limit for a Junior ISA?
As of the 2023/2024 tax year, the annual contribution limit is £9,000. This limit may change in future tax years.
Can I withdraw money from a Junior ISA before the child turns 18?
Generally, funds in a Junior ISA cannot be withdrawn until the child turns 18. There are very limited circumstances where early withdrawal is allowed.
Does the calculator account for inflation?
No, the calculator does not account for inflation. It provides a nominal future value based on the inputs provided.
Are the returns guaranteed?
No, the returns are not guaranteed. The calculator assumes a fixed interest rate for estimation purposes. Actual returns may vary based on the Junior ISA’s performance and market conditions.
Have you tried our Compound Interest Calculator?

Use our free compound interest calculator to calculate the future value of your investments. Enter your principal, interest rate, and compounding frequency to see your savings grow!

Compound Interest Calculator