One of the most useful things a parent can do for a child's financial future costs nothing and takes about ten minutes.
Adding your child as an authorised user on one of your existing credit cards means their credit file will inherit that card's full history — your payment record, the age of the account, the credit limit — as if it were their own. If you've had a card open for fifteen years with a perfect payment record, your child can start their credit journey with fifteen years of clean history already attached to their name.
This is completely legal. It's a feature of the credit system, not a loophole. And for a young person who's about to need credit for the first time — a car, an apartment, a student loan — arriving with an established file instead of a thin one makes a meaningful difference.
How authorised user status works.
You call your card issuer and add your child as an authorised user. They'll receive a card in their name (you can choose not to give it to them if you prefer). The account appears on their credit report. The primary cardholder — you — remains responsible for all charges. The authorised user builds history but has no legal obligation to pay.
Most major issuers — Chase, Citi, American Express, Capital One, Discover — allow authorised users. Some have minimum age requirements (typically 13–15). American Express has no minimum age at all. The exact policy varies by issuer.
A 16-year-old added to a parent's ten-year-old card with a perfect payment history can start their adult financial life with a credit score in the 700s. That's years of work, gifted.
The risks to your own score.
If your child has the physical card and uses it irresponsibly, you are liable for those charges. The credit utilisation on the account — how much of the limit is being used — affects your score too. If the card gets maxed out, your score goes down.
The simple mitigation: give them the card for one specific, small use only. A phone bill. A subscription. One tank of fuel a month. Have a clear agreement about what it's for. Or don't give them the card at all — they still get the credit history, even without the physical card in their hand.
Which card to use.
Use your oldest card with the best payment history and the lowest utilisation. Age of account and payment history are the two factors that transfer most powerfully. Ideally the card should have been open for at least three years, have zero late payments, and be carrying less than 30% of its limit in balance.
Don't add them to a card that's close to its limit or has any negative marks — those transfer too.
When to do this, and when to move beyond it.
Adding a child at 15 or 16 gives them 2–3 years of history by the time they're applying for their first apartment or car loan at 18. That's the sweet spot. Add them too late and there's not enough time for the history to accumulate. Too early and you have years of managing a card you need to stay clean.
Authorised user status is a starting point, not a final answer. Once your child is 18, they should open their own secured card or student card to start building their independent credit profile. The authorised user history gives them a foundation; their own account starts building the structure on top of it.
The financial system advantages people who learned how it works early. Teaching your child this before they need it is one of the most practical things you can do with ten minutes and an existing credit card account.
Call your card issuer today. Add them as an authorised user. Have the conversation about what the card is for, and what it isn't. Then let the months stack up quietly in the background — building something that will matter long before they know to be grateful for it.