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Becoming an authorized user on someone else’s credit card account is a common strategy for improving credit quickly. It works best if the primary user's card has a long record of on-time payments and the authorized user doesn't have recent blemishes on their credit report.
If you're just starting out and have a thin credit file, it's likely to benefit you more than it will if you've been using credit longer and have missteps to overcome.
In either case, becoming an authorized user works best when paired with a plan to diligently build credit over time.
What is an authorized user?
If you become an authorized user on someone else’s credit card, the issuer will send them a card with your name on it. The credit card issuer holds the primary account holder responsible for paying charges on the account, not the authorized user.
Because charges you make create an obligation for the account holder, agree ahead of time whether you'll use the card or simply be listed as an authorized user. The effect on your credit is the same, even if the account holder never gives you the card to use.
If you can’t qualify for a credit card on your own, being an authorized user can help you beef up your credit history and can help with "credit age," a scoring factor. If you don't yet have a FICO score, it can shorten the time needed to generate one to less than six months. It may also let you enjoy the convenience of having plastic in your wallet.
How your credit is affected
Because you're not responsible for paying the bills, being an authorized user may not have a huge impact on your credit score. But it helps those with little or no credit history beef up their credit files.
Ask someone who uses a small portion of their credit card limit and has a clean payment history on an account that's been open for a long time. Make sure the card issuer reports authorized users to the credit bureaus: If your authorized user status doesn't show up on your credit reports, it won’t help your score.
Authorized user status alone might not increase your chances of getting approved for credit cards and loans in the future. Lenders checking your credit history want to see that you’ve managed your own credit accounts responsibly.
While you're working on your score, consider applying for a secured credit card. You'll have to pay a deposit upfront if you're approved. Secured cards allow you to prove that you can manage your own card. Being the primary account holder will have a much bigger impact on your credit score than being an authorized user.
How to build your credit significantly
So what can you do to build your credit significantly? Unfortunately, there’s no quick fix for someone with bad credit or no credit, but there are some tried-and-true strategies.
Pay your bills on time. Your payment history weighs heavily in your credit score, so don’t pay late — ever.
Keep your balances low. Your credit utilization ratio (the amount you owe compared with your total available credit) also plays a big role. Aim to use no more than 30% of your credit limit on any card, and lower is better. If you can lower it to single digits, you are likely to get even better results.
Take the long view. The length of your credit history is also important. Keep old accounts open even if you don't use them often — unless there's an annual fee or another good reason to close the account. Avoid opening lots of new cards in quick succession.