Explaining interest to kids

By Pouch · Updated

Quick answer

Interest is extra money that gets added to savings over time. You can show it at home by paying your kid a small bonus on what they have saved, once a month or once a week. Work out the bonus together and let them watch the balance grow, including the bonus on bonuses.

What interest means in plain words

When you keep money in a savings account, the bank pays you a small extra amount for letting them hold it. That extra is interest. The longer you leave the money, the more is added.

Kids rarely feel that growth when the money sits in a drawer. A parent-paid bonus lets them see it in numbers they can follow.

A simple parent-paid system

  1. Choose a rate your kid can calculate, such as 5 percent for one month.
  2. Pick the day it gets paid, such as the first of the month.
  3. Look at the savings balance together.
  4. Multiply the balance by the rate and round to the nearest cent.
  5. Add the result to the balance.
  6. Repeat next month with the new, larger balance.

A worked example

This is only an example with made-up numbers. Say your kid has $20 saved, and you pay 5 percent a month on the balance.

Example: 5 percent a month on $20
MonthStarting balanceBonus addedNew balance
1$20.00$1.00$21.00
2$21.00$1.05$22.05
3$22.05$1.10$23.15

Notice that the second bonus is bigger than the first. The bonus is paid on the money plus the earlier bonus. That is the idea behind compounding, and it is worth pausing on.

Keep the example honest

Choosing how often to pay

Monthly is easiest to follow, because the bonus is large enough to notice. Weekly bonuses are tiny at small balances and can end up as a few cents. If you pay weekly, round to the nearest cent and say so. Pick one schedule and keep it for the whole trial, so the table stays easy to read.

What the system teaches

Doing it with a pretend balance

Pouch does not work out bonuses for you. A parent can add the bonus by hand as money added, once a month, after working it out together. Pouch keeps the pretend balance on your device, and you can note the reason for each addition so the history shows the bonus.

Talking points for different ages

Explaining interest by age band
Age bandHow to say it
Younger kidsShow a pile of coins, then a slightly bigger pile after waiting a month.
Early elementaryShow the monthly bonus on paper and let them add it up.
Upper elementaryCompare two kids: one who saves and one who spends. Use made-up names.
TeensLook at the savings rates banks publish, and compare yearly versus monthly.

Setting the rules up front

Tell your kid the rate, the payday and the rule about withdrawals before the first bonus. If taking money out is allowed, say how it affects the next bonus. Clear rules keep the game fun, and they stop it from becoming a source of arguments.

When to stop

If the system feels costly or confusing, end it with a note: “This was practice, and now we will look at a real account.” See first savings account when your kid is ready for that step.

Related reading

Try the interest calculator for kids to preview a few months. For the saving side, see savings goals for kids.

Questions parents ask

Should parents really pay interest on kids’ savings?

It is optional. Some families do it as a short teaching experiment so kids can see growth. If it costs more than you want, stop or lower the rate.

What rate should I use?

Pick a rate that is easy to calculate and that you are happy to pay. Use a round figure, such as 5 percent a month, and say it is for a short trial.

How do I explain compound interest?

Show the table. The bonus in month two is bigger because it is paid on the first bonus too.

Can the app add the bonus for me?

No. Pouch does not do this step. You work out the amount yourself and add it as money added.

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