Authorized user: a boost without liability
When someone adds you as an authorized user on their card, that card's history can appear on your report — often including its age and on-time payments. You get a card to use but aren't legally responsible for the balance.
It's a low-risk way to help a newcomer, a young adult, or a thin file build credit, as long as the main account stays well-paid.
Joint account: shared ownership and risk
A joint account means both people own it and both are fully responsible for every charge. It reports to both of your credit files, for better or worse.
That shared liability is the catch: if one person misses a payment or runs up the balance, both scores take the hit.
How to choose
Pick authorized-user status when you want to build or share credit with minimal risk — it's easy to add and easy to remove. Pick a joint account only with someone you fully trust and genuinely share finances with, like a spouse.
Either way, the account only helps if it's paid on time and kept at a low balance; a troubled account hurts everyone attached to it.
Protect yourself either way
As an authorized user, you can be removed from the card at any time if the main account goes bad — ask the issuer to take you off. On a joint account, you usually can't simply walk away; closing or refinancing may be required.
Confirm the card reports authorized users to the bureaus before counting on it, and keep watching your own report for how it lands.
Authorized-user status gives you someone's good history with little risk; a joint account shares real ownership — and real liability. Subefy helps you see which fits your situation and tracks how each account affects all three bureaus. Credit disputes are always free.