Last reviewed: September 30, 2026
An authorized user is someone the primary credit cardholder permits to use their account. The arrangement can help with credit building if the issuer reports the account and the scoring model considers it. It can also expose the user to unfavorable account information and leave the primary cardholder responsible for additional spending.
The useful question is not “How many points will I gain?” It is “What account information will be reported, and can both people manage this arrangement?”
What Does an Authorized User Do?
An authorized user may receive a card linked to the primary cardholder’s account. Purchases use that account’s available credit; they do not create a separate borrowing account owned by the authorized user. The primary cardholder remains responsible for the account’s bill. Issuer rules, including age requirements, vary. [1]
Being only an authorized user generally does not make someone responsible for repaying the card debt. A joint account holder is different: joint holders can both be responsible. Legal responsibility can also depend on the original agreement and applicable state law, so confirm the role rather than relying on the label “additional cardholder.” [2]
| Question | Authorized user | Primary cardholder |
|---|---|---|
| Whose account is it? | Uses an existing account with permission | Holds the account with the issuer |
| Who pays the issuer? | May agree privately to reimburse spending | Remains responsible for the account bill |
| Can credit be affected? | Potentially, through reported account information | Through the account’s payment and borrowing activity |
A private reimbursement agreement helps clarify expectations, but it does not transfer the primary cardholder’s responsibility to the issuer.
Can Becoming an Authorized User Build Credit?
Yes, potentially. FICO explains that an authorized-user account appearing on a credit report can affect a score positively or negatively. Recent FICO versions generally give these accounts less influence than primary accounts; older versions may treat them similarly. The effect therefore depends on the model as well as the account. [3]
You do not inherit the primary cardholder’s credit score or their entire credit report. Their score is not an input that can be plugged into an authorized-user calculator to predict your new score.
Start by separating the credit report from the credit score: the report contains account information, while a scoring model evaluates eligible information in that report. Different reports and models can produce different results.
The Rich Guy Math Check: Reporting, Balance, Agreement
Use these three checks before joining an account. This is an editorial decision framework, not a credit-scoring formula.
1. Reporting: Will the Account Appear?
Ask the issuer whether it reports authorized-user accounts and to which credit bureaus. An account that is absent from a bureau’s report cannot influence a score calculated from that report. [1]
Also ask what identifying information is required, whether historical account information is included, and when to check for the first update. Get answers for the specific card rather than assuming every issuer follows the same process.
2. Balance: What Borrowing Will Be Reported?
Look at the account’s reported balance and credit limit together. FICO utilization calculations can include authorized-user credit cards, and reported figures can differ from the balance currently displayed in the issuer’s app. [4]
A large limit does not automatically make an account helpful. The worked example below shows why the balance matters.
3. Agreement: Can Both People Manage the Access?
Discuss whether the user will receive or use a card, permitted purchases, reimbursement dates, fees, and how either person can end the arrangement. Ask the issuer about any additional-card fee and available spending controls.
For the primary cardholder, assess the full bill, including purchases by the authorized user. A promise to reimburse spending is not money already available to pay that bill.
Original Calculation: The Same Credit Limit Can Help or Hurt Utilization
Assume you have one card with a reported $200 balance and a $1,000 limit. Your starting utilization is:
$200 ÷ $1,000 × 100 = 20%.
Now compare two hypothetical authorized-user accounts, each with a $5,000 limit. For this illustration, assume both accounts are reported, eligible, and included in the model’s overall revolving utilization calculation.
| Measure | Lower-balance account | Higher-balance account |
|---|---|---|
| Added account balance | $500 | $4,500 |
| Added account limit | $5,000 | $5,000 |
| Added account utilization | 10% | 90% |
| Combined reported balances | $700 | $4,700 |
| Combined limits | $6,000 | $6,000 |
| Combined utilization | 11.67% | 78.33% |
The first calculation is $700 ÷ $6,000 × 100. The second is $4,700 ÷ $6,000 × 100. Results are rounded to two decimal places.
Both scenarios add the same limit, but one lowers the starting ratio and the other raises it. These are balance calculations, not predictions of score gains or losses. Individual account utilization, payment history, other report information, and the model still matter. See our credit utilization guide for the underlying calculation.
How to Add an Authorized User and Check the Result
- Confirm the issuer’s requirements. Check eligibility, reporting, fees, and the information needed to add the user.
- Agree on access and payments. Put spending and reimbursement expectations in writing before using the card.
- Have the primary cardholder request the addition. Follow the issuer’s process.
- Check credit reports after the issuer updates them. Authorized user accounts do not always appear instantly; it typically takes one to two full billing cycles for the new account to show up on your credit report. Once it appears, verify the account’s role, balance, limit, and payment information using our credit report reading guide.
- Address discrepancies. Ask the issuer about missing reporting. For inaccurate reported information, follow the steps to dispute credit report errors.
You can obtain free weekly reports from each of the three nationwide bureaus through AnnualCreditReport.com, according to the FTC. [5] Checking the report establishes whether the account appeared; a score alone does not explain the change.
How to Remove an Authorized User
The CFPB advises the primary cardholder to contact the issuer’s customer service and request removal. Ask whether a replacement card number is appropriate if the former user knows the existing number, and notify the user that access has ended. [6]
If you are the authorized user and want to leave, ask the issuer how you can request your own removal. Confirm how the account will be handled in credit reporting and check subsequent reports. Removal changes the information available for scoring; do not assume it will always raise your score.
Frequently Asked Questions
How Many Points Will My Score Increase?
There is no reliable fixed-point or percentage prediction from authorized-user status alone. Neither the other person’s score nor their card limit is enough to calculate your result.
Will It Help Me Build Credit Faster?
It may add eligible account information, but there is no guaranteed timetable for reaching a particular score. Reporting and scoring are separate steps. Our credit-building timeline guide explains that distinction.
Should I Eventually Open My Own Account?
An account in your own name can demonstrate your management of credit. Consider one when its costs and payments fit your finances, rather than following an arbitrary deadline. Our guide to building credit explains how to evaluate a first account.
Make the Decision From Account Information
Before becoming an authorized user, verify reporting, calculate the balance-to-limit relationship, and agree on spending responsibilities. Afterward, check what actually appears on your reports. For the wider picture, use our credit education hub to connect reporting, borrowing, and repayment decisions.
Sources
- Capital One: Do authorized users build credit?
- CFPB: Debt responsibility after divorce — distinguishes joint accounts from authorized-user status and notes legal qualifications.
- myFICO: How do authorized-user accounts affect FICO Scores?
- myFICO: Accounts that may affect credit utilization
- Federal Trade Commission: Free credit reports
- CFPB: How to remove an authorized user
About the Author
Max Fonji is the founder and financial education writer behind The Rich Guy Math. He explains personal-finance concepts through research, calculations, and practical examples.
Educational Disclaimer
This article provides general education, not personalized financial or legal advice. Examples are hypothetical and do not predict credit scores or lending decisions. Issuer policies and individual circumstances vary.