FinToolSuite

Child Savings Calculator

Updated April 17, 2026 · Savings · Educational use only ·

How much to set aside each month.

Calculate monthly savings needed for child's financial goal. Enter target, ages, and return to see required contribution.

What this tool does

This tool calculates the monthly contribution needed to reach a savings target by a target age for a child. Enter the target amount, child's current age, target age, current savings, and expected investment return. The calculator shows monthly contribution required, years available, future value of existing savings, and any shortfall. Assumes monthly contributions at the end of each month.


Enter Values

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Formula Used
Target amount
Current savings
Monthly return rate
Total months

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Disclaimer

Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.

Saving for a child takes decades. 50,000 by age 18 (roughly enough for university living costs or a first-car deposit) requires meaningful monthly contributions starting young. This calculator works out exactly how much needs to go in each month, given your target, timeline, and expected return.

Key insight: starting early matters more than contributing more. 50 a month from birth compounds to roughly 19,000 by 18 at 7%. Starting at age 10 and saving 200 a month produces only 23,000 - despite contributing nearly triple. Time beats amount in long horizons.

Most parents use tax-advantaged child savings account (9,000 annual contribution limit) for tax-free growth. The tool doesn't assume account type - just projects the math. Whatever account you choose, the required monthly contribution stays the same; the tax treatment affects how much stays invested vs goes to tax. Choose a tax-sheltered account where possible.

Run it with sensible defaults

Using target amount of 50,000, child current age of 0, target age of 18, current child savings of 0, the calculation works out to 116.08. Nudge the inputs toward your own situation and the output recalculates instantly. The defaults are meant as a starting point, not a recommendation.

The levers in this calculation

The inputs — Target Amount, Child Current Age, Target Age, Current Child Savings, and Expected Annual Return — do not pull with equal force. Not every input has equal weight. Flip one at a time toward extreme values to feel which ones move the needle most for your situation.

How the math works

Years = target age - current age. Future value of existing savings = current × (1+r/12)^(months). Required monthly contribution uses standard annuity formula to cover any shortfall. The working is transparent — you can verify every step yourself in the formula section below. No black box, no opaque "proprietary model".

Turning the result into a plan

A projection is just a starting point. The real work is setting the monthly amount aside automatically so the saving happens before you can spend it. Most people who hit savings goals set up a standing order on payday; most who miss them rely on willpower at month-end.

What this doesn't capture

The calculation assumes a steady savings rate and a stable interest rate. Real saving journeys include emergencies, windfalls, and rate changes — especially in easy-access products. The figure is a direction of travel, not a guarantee.

Example Scenario

To save 50,000 £ by age 18 years starting with 0 £, contribute $116.08/month.

Inputs

Target Amount:50,000 £
Child Current Age:0 years
Target Age:18 years
Current Child Savings:0 £
Expected Annual Return:7%
Expected Result$116.08

This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.

Sources & Methodology

Methodology

Years = target age - current age. Future value of existing savings = current × (1+r/12)^(months). Required monthly contribution uses standard annuity formula to cover any shortfall.

Frequently Asked Questions

Should I use a tax-advantaged child savings account?
For parents, almost always yes. 9,000 annual contribution limit, tax-free growth, access at 18. The choice is between Cash tax-advantaged child savings account (safer, lower returns) or Stocks & Shares tax-advantaged child savings account (higher long-term return, volatile). For 10+ year horizons, stocks usually win.
What return should I assume?
Stocks & Shares tax-advantaged child savings account: 6-7% long-term. Cash tax-advantaged child savings account: 3-4%. Mixed 50/50: 4-5%. Use the actual return type you expect to hold, not the fund's best year. Over 18 years, equity returns likely beat cash but with more volatility along the way.
What if I miss contributions some months?
The target still hits if you average the required contribution. Missing 50 in one month and making up 100 next month is fine. Missing six months means contributing 50% more the rest of the year to catch up - or accepting a smaller final balance.
Can the child access the money before 18?
Not from a tax-advantaged child savings account. That money locks until 18. If flexibility matters, use a general savings account in your name earmarked for the child - but the tax treatment is worse. Most parents accept the lock-up for the tax-free growth.

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