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The facts about joint credit cards, authorized users, and secondary cardholders

Almost as popular as having a credit card is having a joint credit card. Whether it’s with your parents, your spouse or your children, there’s a good chance the credit card you use is shared with someone else.

You might have questions about how joint credit cards work. Like, can you build credit when you use your parent’s credit card? And who’s ultimately responsible for making the payments? And who gets the rewards if it’s a cash back credit card?

Here are some answers.


Joint credit card basics: primary cardholder vs. authorized user vs. co-borrower

Primary Cardholder

A primary cardholder is the person who the credit card belongs to in the first place. As a primary cardholder, you’re the one who made the application, went through a credit check, and formally agreed to the terms and conditions (and repayment schedule) of the credit card.

Authorized user (also known as a supplementary cardholder)

An authorized user or supplementary cardholder is someone who has permission from the primary cardholder to use their credit card account. It’s up to the primary cardholder to decide who, if anyone, is allowed to hold a supplementary card.

As an authorized user, you won’t go through a credit card application or credit check and aren’t responsible for paying the bill. You also don’t need to meet the credit card’s qualification requirements. In a nutshell, you’ll have the ability to access the primary cardholder’s credit limit to make purchases – and that’s it.

Co-borrower (also known as a secondary cardholder)

Not to be confused with an authorized user or supplementary cardholder, a co-borrower refers to someone who applied for a credit card together with another person. Co-borrowers are far less common, and in most cases, couples and family members who share a credit card account usually do so as primary and authorized users.

As a co-borrower, you would go through a credit check and would need to meet certain credit card eligibility requirements.


Will I build credit on a joint credit card?

Authorized user

If you use a credit card responsibly and pay off your purchases, it makes sense that you should build credit for doing so. But when you’re an authorized user or supplementary cardholder, you’re technically using someone else’s credit and card issuers (like banks) won’t be reporting your information to credit bureaus.

Even though your supplementary credit card has your name on it and a unique number, as an authorized user, your card activity won’t go towards building your credit score. That said, the primary cardholder’s credit score could be affected by the actions of their authorized user – for better or worse.


Unlike an authorized user, as a co-borrower, your information was included as part of the credit card application, and therefore, your card activity is reported to credit bureaus. That means both you and your fellow cardholder will see the effects of making (or not making) monthly payments on each of your respective credit scores.


Who is responsible for paying the balance on a joint credit card?

Authorized user

The responsibility of paying off the credit card balance lies solely with the primary cardholder and not the authorized user. In fact, the primary cardholder is the only person who will receive a bill. By adding an authorized user, the primary cardholder is giving that person permission to make whatever charges they want on the card.

The primary and authorized user could make an agreement between themselves as to who pays what portion of the bill, but it’s ultimately the primary cardholder who has to pay off the debt.


As a co-borrower, you and your fellow cardholder will receive monthly statements and will be equally responsible for paying off the credit card balance – regardless of who actually made the purchases.


How do rewards work on a joint credit card?

Authorized user

If you’ve signed up for one of Canada’s best travel credit cards, you’ll be happy to know your authorized user’s purchases are contributing toward your next vacation. All the charges on a joint credit card will count toward rewards, regardless of which cardholder makes the purchase. The limiting factors are also shared, such as your credit limit and any caps on rewards. The primary cardholder will also have the exclusive right to redeem and use the rewards earned.


As a co-borrower, you would contribute toward racking up rewards on your purchases. In some cases, you may also have the ability to redeem points, but this may vary by bank and card issuer.

Is adding supplementary users worth it?

Depending on your card, some providers may charge you upwards of $30 per year to add a supplementary user (not to mention hold you responsible for any purchases made or debt incurred by them), but it's still largely a great idea. If you've got a rewards card, supplementary users can help you rack up double the points on your account. Plus, keeping family members on the same account makes it easier to track your finances. Just make sure you trust whoever you plan to add as a user.


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Card details

  • Annual fee: $155.88 (charged at $12.99 monthly)
  • Welcome Bonus of 20,000 Membership Rewards points when you spend a total of $3,000 in purchases on your Card in your first 3 months of Cardmembership
  • Add up to 9 additional users at no extra cost
  • Earn 5 points per dollar on dining
  • Earn 2 points per dollar on gas, travel, taxis, and public transit
  • Earn 3x the points on eligible streaming subscriptions in Canada
  • Earn 1 point per dollar on all other purchases
  • Welcome Offer: 2,500 points every month you spend $500 in your 1st year (total value of $300 in statement credits redeemed towards purchases charged to your Card or $225 in American Express® Prepaid Cards
  • Transfer points 1:1 to several frequent flyer and other loyalty programs

Card details

  • $120 annual fee
  • Add up to 9 additional users at no extra cost
  • Earn 2 MBNA points (2% in travel points) on all purchases
  • Receive 20,000 bonus points†† after you make at least $2,000 in eligible purchases within the first 90 days of your account opening
  • Receive 10,000 bonus points†† once enrolled for e-statements within the first 90 days of account opening
  • Income requirement: $80,000

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