Audience: Parent + teen approaching 18
Child age: 17-18
Total time: 40 min
You will need: JISA balance + laptop
Format: Read + activity
Last reviewed: 2026-05-11

Before you start

Run this 3-6 months before the 18th birthday. The conversation has less leverage in the week of the birthday than in the months ahead.

You will need:

The current balances of their JISA, CTF (if applicable), and any savings accounts they'll inherit
Your laptop or tablet (so you can look up the LISA providers together)
The teen's phone (with their permission — for setting things up on the day)
Genuine willingness to let them make the final call. If you've already decided what should happen, this becomes a lecture.

Tone note: Your teen has legal rights here that you don't. The money is theirs. Your role is to make sure they're making an informed decision, not the decision you want them to make.

1What changes on the 18th birthday8 min

Lay out the legal reality so it doesn't come as a surprise.

You say:

"On your 18th birthday, a lot of things change automatically. I want to walk through them with you so you know what's happening — and so you can decide what to do."

Account	What happens
Junior ISA	Automatically becomes an adult ISA in your sole name. You can withdraw any amount, anytime.
Child Trust Fund	Matures. Same as above — full control, full access.
Junior SIPP (if any)	Becomes an adult SIPP. Still locked until age 57+.
Bank account with parental control	Parental authority ends. Your account, entirely.
Premium Bonds (if any)	Were already in your name from 16. No change.

The honest framing:

"Legally, on that day, the money is yours. I have no veto. The reason I want to talk about this before is so you walk into the decision having thought about it, not under pressure."

Were you aware of all of these?

Is there one you want to look at in more detail first?

2Show the actual numbers7 min

Pull up the balances. Don't be vague.

Log in together.

JISA app or website. Show the current balance. Show the contribution history if available. Show the growth chart.

Translate the number:

"This is £X. To put that in context: it's about [Y months of rent / 30% of a typical first-flat deposit / Z years of LISA contributions / a small car]."

Show the growth path so far.

"You started with £X at age Y. Over Z years it grew to this. The growth has come from compound interest / market returns. Notice the acceleration in the later years — that's how compounding works."

Did you know it was that much?

What did you think it was?

The gap between expected and actual often shapes the conversation. Pleasantly surprised? They're more open to leaving it growing. Disappointed? Lower-stakes withdrawal decision.

3The four-option matrix10 min

Most teens think there are two options: take it out, or leave it. Show all four.

Option 1: Take it all out.

Becomes cash in their current account. They can spend it on anything. Lose the tax-free wrapper on whatever they don't put back into an ISA same tax year.

Option 2: Roll into an adult ISA.

The JISA automatically becomes an adult ISA — if they do nothing, this is what happens. Tax wrapper preserved. They can withdraw any time. No commitment.

Option 3: Transfer some to a LISA.

Up to £4,000 a year can go from the adult ISA into a new Lifetime ISA. The government adds 25% bonus — £1,000 free money. Locked for first home or age 60. The most "best of both worlds" option for most teens.

Option 4: Split it.

Take some out (gap year, car, fun), keep some in the ISA wrapper, move some to a LISA. Most realistic for most teens.

Option	Pros	Cons
Take all	Total freedom	Lose tax wrapper; no bonus; easy to spend fast
Leave in ISA	Easy; reversible; tax wrapper	No bonus; not earmarked for anything
Move some to LISA	25% bonus; first-home boost	Locked unless first home or age 60; 25% withdrawal penalty otherwise
Split	Flexibility; some bonus; some freedom	Have to actually decide ratios

If you had to pick one right now, which?

Don't accept "I don't know" as the final answer. "Imagine you had to decide today — even just provisional — what would you say?"

4Imagine future-you6 min

The single most useful exercise in this whole pack. Most teens have never been asked this question.

Set the scene:

"Imagine yourself at 25. Five years older than you're about to be. Same person, just a few years on. What does that version of you say about how you spent this money?"

Let them sit with it. Don't fill the silence.

Then 30:

"Now imagine you at 30. Maybe trying to buy a first flat. Maybe travelling. Maybe with a kid of your own. What does that version say?"

The point:

This isn't about scaring them with "you'll regret it." It's about giving the decision a longer time horizon. 18-year-olds often default to the next 12 months because they have no practice thinking in years. 5 minutes of thinking forward changes outcomes.

If you took it all out and spent it now, what would future-you have wanted you to spend it on?

If you left it for first-home, how does that feel?

5Open the LISA together (if they've decided)7 min

If they want to use a LISA for some of the money, do this part on or just after the 18th birthday — not before, the LISA can only legally be opened at 18+.

Pick a provider together.

Cash LISA (Moneybox, Skipton, Newcastle BS, Nottingham BS). Stocks & Shares LISA (Hargreaves Lansdown, AJ Bell, Vanguard, Moneybox). Cash for short horizons, S&S for 5+ years.

Set the contribution rate.

£50-100/month is a realistic starting point for most working teens. Up to £4,000/year max.

Watch the first bonus arrive.

4-9 weeks after the first contribution, the government deposits the 25% bonus. Show them when it lands. "That's £25 they just paid you for saving £100."

The handover ritual.

This is your moment. "From here, this is yours. The login is on your phone. Statements come to your email. I'm here if you have questions but I'm not in the account."

6Closing — what happens now2 min

Wrap up with a clear plan.

You say:

"We'll come back to this in 3 months and see how it's going. No interrogation — just check the system's still working. You've got more autonomy than most of your friends here. Use it well."

Anything you want to remember from today?

After the conversation

After the conversation:

Write down the decisions they made — nothing formal, just a list. Useful 3 months later.
On the actual 18th birthday, the JISA converts automatically. The bank/broker may send a letter — don't lose it.
If they decided to open a LISA, do it together on or just after the birthday. Don't leave it.
Quarterly 10-minute check-ins for the first year are the difference between this conversation sticking and being forgotten.

For the deeper reference on the legal mechanics, see the 18th-birthday handover guide.

Cite this pack
UK Tax Drag (2026). The 18th-birthday money handover — a 40-minute conversation pack. Family conversation pack. Available at: https://kids.uktaxdrag.co.uk/parent-conv-18th-birthday-handover.html
CC BY 4.0. Free to share, photocopy and use in classrooms.

Not financial or legal advice. This is a conversation starter only. Tax rules, benefit thresholds and product features change between UK Budgets — always confirm current rules at gov.uk before making decisions involving real money.