Child Turns 18: How to Transfer the Brokerage Account Right — 2026 Tax & Strategy Guide
At 18 the custodial account changes hands automatically — and that’s exactly where the most expensive mistakes happen. A wrong transfer can trigger gift tax, knock the child off your family health insurance, or destroy any need-based education aid. This guide explains what happens before and after the 18th birthday, when a transfer stays tax-free and the 3 mistakes you must avoid.
Per parent €400,000 gift allowance — renewed every 10 years. Father + mother together = €800,000 tax-free per decade. A custodial account with €80,000 sits well below and is normally fully tax-free. But that only applies if the account was formally in the child’s name from day one — otherwise the transfer is a separate gift event. (US: $19,000 annual exclusion per donor in 2026, $13.99M lifetime exemption — check current IRS limits.)
What happens automatically on the 18th birthday?
If the account was in the child’s name from the start (parents as legal representatives), three things happen automatically at age 18:
- Authority shifts to the child. Without a power of attorney parents can no longer trade, withdraw or change account data. The broker usually requests proof of adulthood (ID copy).
- Tax switch. From the 18th birthday on, the child is independently taxable. They get their own tax-free allowance of €1,000 in Germany — that the parents had been using as representatives.
- Family-insurance risk. Income from the account counts as the child’s own income from age 18. If dividends + Vorabpauschale + realized gains exceed €535/month (DE 2026), the child loses family insurance under statutory health coverage.
Three scenarios — what to do with the account?
- Account in child’s name from day one — handover is a formality, not a tax event.
- Renew tax allowance at €1,000 single (child not married).
- Discuss strategy: an 18-year-old has a 50+ year horizon — world ETFs make sense.
- Account ran in parent’s name — transfer is a gift, check allowances.
- Cash transfer > €5,000 to child’s account can kill education aid (DE Bafög asset limit €15,000).
- Adult child + income too high → switch to student health insurance (~€120/month).
Example: €60,000 account at age 18
At €60,000 × 1.8 %, monthly dividends are about €90 — comfortably below the family-insurance limit. Only above ~€360,000 with 1.8 % yield does the health-insurance question become real.
Education-aid trap: when the account destroys eligibility
For German Bafög applicants there’s an asset limit of €15,000 (2026). Above that, the excess is treated as monthly income spread over 12 months — aid drops drastically or disappears.
Solution for parents who built up a large custodial account and don’t want to jeopardize aid:
- Before the aid application, transfer shares back to the parent account (reverse gift) — careful, this counts as wealth shifting and can raise red flags.
- Cap the custodial account at €15,000 if Bafög is likely — save the rest in a parent account and transfer at age 25 (Bafög end).
- No effect: the tax-free allowance and family insurance remain independent of Bafög.
Investment strategy for the next 50 years
An 18-year-old with €60,000 in the account, at 7 % historical world-equity returns, has a calculated €1.7 million at age 65. Three rules suffice:
| Rule | What | Why |
|---|---|---|
| 1. Buy & Hold | World ETF (FTSE All-World or MSCI ACWI) | 50 years is enough time for any crisis |
| 2. Keep saving plan | €50–€200/month from apprenticeship/student income | Consistency beats timing |
| 3. Don’t touch | Don’t raid for car, travel, crypto trade | Young adults underestimate compounding |
Frequently asked questions
Do I need to report the account transfer to tax authorities?
No, if the account was always in the child’s name — it’s not a gift event. If a transfer does happen (parent → child) and the value exceeds the allowance, it must be reported to the gift-tax office within 3 months in Germany.
What happens to loss carryforwards on transfer?
If the account stayed in the child’s name throughout: carryforwards persist. If transferred (gift): loss carryforwards are lost — the child starts fresh. Parents can request a loss certificate by 15 Dec in some cases (Germany) to use the losses on their own return.
Can my child immediately raid the account at 18?
Legally yes. The biggest worry of most parents. Solution: at 16/17 plan a family conversation, discuss strategy and life planning together. Children never confronted with money have a higher risk of bad decisions at 18.
What about ongoing savings plans?
Savings plans can continue after 18 with the child’s consent. If parents want to keep contributing: every parent contribution is a gift and uses the €400,000 allowance — irrelevant for small monthly amounts since never exhausted.
Should parents keep a power of attorney?
Yes, often a good idea — even after age 18. An account power of attorney protects in case the child is unreachable abroad or sick. Cost: usually free at the broker, simple form.
What’s the cost to transfer accounts between brokers?
Within Germany an account transfer is legally free (§134 InvG). Some brokers even pay a switch bonus (€50–€250). Watch out: international transfers (e.g. Interactive Brokers) can incur €25–€50 flat fees.
Calculate what the custodial account becomes by retirement
Real-return calculator with inflation and compounding — see what €60,000 today at age 18 is worth in 47 years.
- Compounding over 50 years, real (inflation-adjusted)
- Savings-plan growth with/without lump sum
- Education-aid asset-limit tracker