How long a child can actually keep saving

Children are usually told to save for a thing: a bike, a scooter, a console. Nobody names a deadline — it falls out of the price. Pocket money is small and the thing is expensive, so that means a month, maybe three. The child agrees and almost never gets to the end.

In 2021 Patrick Burns, Teresa McCormack and colleagues at Queen's University Belfast published a paper in Child Development that explains why.¹ It involved 132 children between seven and eleven. They were offered real rewards — cards, erasers, small change, the things still worth fighting over at that age — and real waits: a day, a week, a month. How far away each wait felt was measured separately.

Distant future time is compressed more for children than for adults: the further off the date, the worse a child distinguishes how much further it is. A week and a month sit closer together than the calendar puts them, and a month is already a stretch with no visible end.

Then comes the part that matters to a parent. Over a day and over a week, eleven-year-olds waited noticeably better than seven-year-olds: age helped. Over a month the gap between the younger and the older children vanished. Everyone gave up.

So over a week a child still holds on, and holds on more reliably the older they are. Over a month age stops deciding anything: the eleven-year-old quits the way the seven-year-old does.

What psychologists tried, and what worked

In 2024 McCormack, with Canning and Graham, assembled a review in Developmental Review covering twenty-two studies — every experiment in which children were taught to delay.²

Psychologists measure the strength of a technique in standard units. On the accepted scale 0.2 is a small effect, 0.5 a medium one, 0.8 and above large; anything pressed against zero means the technique did nothing.³

“Picture your future self” works reliably with adults and underpins half the personal finance shelf. With children it produced nothing in any of the nine experiments that tested it. Preschoolers and young schoolchildren do not build that projection, however often they are asked to.

Two things worked. Lived experience of waiting scored 0.73: a child who once waited and received finds the next wait noticeably easier. And well ahead of it, at 0.98, a concrete reason to wait that the child can check for himself. Both figures come from individual experiments within that review rather than an average across all of them.

The second result traces back to Nisan and Koriat in 1984.⁴ They compared two approaches: telling a child that another child had chosen differently, and asking the child to come up with arguments for that choice himself. The second worked better — but only when the arguments favoured waiting.

That gives two conditions. A reason to wait that the child verifies himself. And one instance carried through to the end, where the waiting finished in something.

A week that arranges this

What follows is a protocol we assembled from those papers. It has one job: to give a child the lived experience worth 0.73, inside a stretch of time he can actually hold. The reason to wait, the one weighing 0.98, is built into the rule of the game.

A caveat: this is a compilation of other people's results, not a method we have tested. The sums are in dollars for convenience; for you they may be pounds, euros, tenge, som or another currency.

The rule. Stated in advance and held all week: whatever you earn and put aside, I will double. The child verifies it himself, by multiplying by two — earn two, put it aside, it becomes four.

The chores. Work out the list and the prices before you start. Water the plants, help set the table, read for twenty minutes — enough to come to about two dollars a day. If there is physically nowhere to earn that much, the child will not reach the goal, and the fault will be in the arithmetic rather than in him.

The goal. Choose it together. One condition: it has to fit inside the week's budget. On $8 of pocket money the budget works out like this:

If your child wants a $60 building set and the budget is $32, there are three options: pick a cheaper goal, raise the prices on the chores, or add a starting amount. Leaving a goal that cannot be reached in a week is a bad idea — the week will end in nothing, and that is what will be remembered.

Once the goal is chosen, let your child hold the thing — in a shop, rather than in a photograph on a phone. And spell out what he gives up by spending now: Imuta and colleagues showed in 2014 that laying the reward out so that the child sees how much is lost by choosing “now”, rather than two options side by side, lets three-year-olds wait as well as four-year-olds.⁵

Day one. The whole of the pocket money goes into the piggy bank — a quarter of the goal straight away. The child did nothing for it beyond not spending it. The point is to make progress visible on the very first day: with a child's stretched sense of time, a week without movement lasts a long while.

Days 2–7. The same thing every day: chore, earnings, piggy bank, doubling. The money goes in immediately, so the daily choice between spending and saving never arises.

What this week does not do

It does not build patience as a stable trait. In 2018 Watts and colleagues re-examined the marshmallow test with 918 children, against the three or four dozen the headline 1990 findings rested on: once family income, home environment and early cognitive scores were taken into account, a fifth of the association remained, statistically indistinguishable from zero.⁶ Patience could not be separated from the circumstances a child grows up in.

The week does something else. Once, with his own eyes, a child sees that the money he did not spend went nowhere — it turned into a thing he chose himself. That is the lived experience worth 0.73, and it is what you lean on when the next goal takes longer.

Doubling is there for the first time only. It compresses the wait to a week, to a stretch a child can hold. After that the share can come down: fifty cents on every dollar saved for the second goal, twenty-five for the third.

Interest on what is put aside can supply the reason to wait in place of doubling. The mechanics are the same: the rule is known in advance, and the child works out for himself what he gets by not spending. The difference is that doubling is a parent's promise, while interest is added on its own, with no adult involved.

The gain takes a while to become visible: a week produces so little that a child will see nothing, so it is better to leave interest switched off in the first experiment. After that it depends on the balance and the rate, and those are what you tune until the difference can be seen. PocketPal has its own interest settings; how to pick a rate and when to switch it on is covered here.