The Growth Roadmap:

Thank you for joining the Nest Egg community.

When families think about putting money aside for a child’s future, they often face a choice between saving (cash) and investing (stocks and shares). Understanding how investing behaves over long periods can help make the idea feel less abstract and more familiar.

Note: Nest Egg provides information only and does not offer financial advice. Investments can fall as well as rise in value.

Long-term investing is more familiar than it seems

Investing can sometimes feel unfamiliar or risky, especially if it brings to mind stock traders, daily price movements or financial speculation.

In reality, most adults in the UK are already long-term investors.

Workplace and personal pensions are typically invested in funds that hold shares, bonds and other assets. The value of those pensions rises and falls over time. The expectation is not that markets move upwards every year, but that over many years, growth outweighs short-term declines.

This long-term, diversified approach is very different from trying to trade frequently or predict market movements.

Trying to move money in and out of markets based on headlines, or concentrating investments in a small number of individual companies, can increase risk. Markets are unpredictable in the short term. Remaining broadly invested over many years is generally regarded as a steadier approach.

For families investing for children, the focus is rarely on short-term performance. It is usually about allowing time to do most of the work.

Saving is stable, but inflation matters

Savings accounts offer clarity and predictability. The balance does not normally fall, and interest is added at a stated rate.

However, inflation gradually reduces what money can buy over time.

If prices rise by 3 percent per year and savings earn 4 percent, the real increase in spending power is closer to 1 percent.

If savings rates fall below inflation, the real value of money may decline even though the account balance appears to grow.

Investing involves risk and short-term fluctuations, but historically broad markets have delivered higher average returns over long periods than cash savings.

If investment growth stays ahead of inflation over time, the purchasing power of the money can increase more meaningfully.

This difference becomes much clearer over longer timeframes.

A simple illustration

The examples below assume £50 is contributed each month. One line assumes a 7 percent average annual investment return. The other assumes a 4 percent annual savings interest rate.

These figures are simplified illustrations only. Actual returns and interest rates change over time, and investments can fall in value.

From birth to age 18

In this example, £50 per month is contributed from birth until age 18.

One line shows money saved at 4 percent interest. The other shows money invested with an assumed 7 percent return.

By age 18:

• Saving £50 per month grows to around £15,800

• Investing the same amount grows to around £21,600

The difference at this stage is noticeable but relatively modest. What matters more is that investment growth begins to build on previous growth.

At age 18, a Junior ISA becomes an adult ISA. The money does not need to be withdrawn. It can remain invested and continue to grow if your child chooses.

The key change at 18 is simply access. Whether the money stays invested or is used becomes a personal decision at that point.

From birth to retirement age

This second example looks at what could happen if £50 per month were contributed to a Junior SIPP from birth and remained invested until age 65.

A Junior SIPP is a pension account for a child. While the money cannot normally be accessed until the minimum pension age (currently 57 from 2028), investments can remain in the account for as long as the individual chooses. For illustration, this example continues the investment to age 65, which is often considered a typical retirement age.

This does not mean a parent or grandparent would normally contribute for that entire period. Contributions may stop much earlier, and your child may later decide to contribute to the pension themselves.

The purpose of the example is simply to show what can happen when investments begin early and remain in place for many decades.

A Junior SIPP also includes a feature that a Junior ISA does not: tax relief on contributions.

For children, up to £2,880 can be contributed each tax year, and the government currently adds £720 in basic-rate tax relief, bringing the total invested to £3,600 before any investment growth takes place.

If £50 per month were contributed into a Junior SIPP, those payments would receive this government top-up each year, increasing the amount invested before growth is applied.

The chart below illustrates the combined effect of regular contributions, government tax relief and long-term investment growth.

In this example:

• Saving £50 per month at 4 percent grows to around £186,000 by age 65

• Investing £50 per month into a Junior SIPP, including tax relief and a 7 percent return, grows to around £995,000

The difference highlights the powerful combination of tax relief, investment growth and time.

Why time changes the picture

In all of these examples, the most powerful factor is time.

Money invested for longer has more opportunity to grow and to recover from periods of decline.

Short-term market drops are a normal part of investing. Over longer periods, markets have historically recovered from downturns and continued to grow, although there are no guarantees.

The longer the timeframe, the smaller the influence short-term volatility tends to have on the overall result.

What this means for Junior ISAs and Junior SIPPs

A Stocks and Shares Junior ISA allows investments to grow tax-free within the account. At age 18, it becomes an adult ISA and can continue if your child wishes.

A Junior SIPP allows investments to grow tax-free within the pension and includes government tax relief on contributions. The money is not normally accessible until the minimum pension age.

The difference between the two accounts is not whether investing continues, but when the money can be accessed.

For families deciding between saving and investing, the question is often not only how much to contribute, but how long the money is likely to remain invested and when it might realistically be needed.

In summary

Saving and investing behave differently. Savings offer stability but may struggle to outpace inflation over long periods. Investing involves risk and short-term fluctuations. Over decades, markets have historically delivered higher average returns than cash. The length of time money remains invested has a significant impact on outcomes. Junior SIPPs include government tax relief, which increases the amount invested from the outset.

Understanding these principles can make long-term investing feel more familiar and less intimidating when planning for your child’s future.