What Supporting an Adult Child Actually Costs

I asked nine households to guess, before we counted, what they spent a year on their grown children.

The median guess was $3,000. The median actual figure was $9,840.

Nobody was lying and nobody was in denial. The reason for the gap is structural, and once you see it in one household you see it in all of them: almost none of the money moves through anything anyone would call support.

The lines nobody counts

$3,600 of housing, which everybody counted. $360 of occasional transfers, which everybody counted.

Then: $2,040 of groceries, because a household of three that feeds four buys more food and nobody itemises it. $1,680 of car insurance and fuel, because the policy is a family policy and taking a 24-year-old off it is a phone call somebody keeps meaning to make. $540 of phone, because a line on a family plan is $45. $1,320 of health premium. $300 of streaming.

That is $5,880 a year running through six lines, five of which the parents did not think of as support at all, and every one of which is individually too small to be worth an argument.

Which is the actual finding here. These arrangements do not persist because families are avoiding a difficult conversation about money. They persist because there is no single expense large enough to trigger the conversation, and the aggregate — the only number that would trigger it — is one nobody has ever calculated.

Six of nine had been running for four years or more with no stated end and no review date — the same absence that makes a free grandparent so expensive in the other direction.

The children’s version

We interviewed six of the adult children separately.

Four of them substantially underestimated what was being spent on them, in the same direction and for the same reason as their parents. Two named the phone plan and thought that was most of it.

Three said, unprompted, that they would rather know the number. One 26-year-old put it more sharply than anyone in the piece: “If they told me it was ten grand a year I’d be off the insurance by Friday. Nobody’s told me it’s ten grand a year.”

I want to be careful with that quote, because it is the one that will get shared and it flatters the children at the expense of the parents. Two of the six were entirely aware of the arrangement and comfortable with it continuing. But the pattern held: where the total had never been said out loud, nobody on either side of it was operating on real information.

Name a date, not an amount

Four households changed the arrangement during our reporting. All four did the same thing.

They did not reduce anything. They named a month.

“You’re on the insurance until March.” “We’ll do the phone until you finish the contract at work, and that’s June.” The amount stayed exactly the same until the date arrived, and in three of four cases the child had moved first — one got themselves off the health plan six weeks early, having discovered what their employer’s option actually cost.

The reason this works, and reducing an amount does not, is that an amount invites a negotiation about the amount, and every negotiation about an amount is really a conversation about how much a parent loves their child, which is not a conversation anybody wins. A date is a fact. It can be moved, once, for a reason, and everybody in the household knows exactly where they stand until it arrives.

The one that did not change

The ninth household is a couple in their late fifties supporting a 31-year-old with a chronic illness that intermittently prevents him from working. Their figure is $14,200 a year and they have no intention of changing it.

I include them because a piece like this one, unqualified, reads as an argument that support should end, and it is not that. What we found is that households with a number and a date describe the arrangement as a decision, and households without either describe it as a situation — and the second group, in all six cases, had some resentment in it somewhere, running in one direction or the other.

The couple with the $14,200 have a number, a review each January, and no resentment I could find in either of two separate interviews. They are the household in this piece with the largest transfer and the least conflict about it, and those two facts are not unrelated.