Amex Platinum Companion Card vs Authorized User Compared

You want to share your American Express Platinum Card with a spouse or partner, and Amex gives you two confusingly similar choices: a free Companion Platinum Card or a paid Additional Platinum Card, which most people just call an authorized user. They are not the same product, and picking the wrong one can either waste money or cost you lounge access.

Here is the plain difference, with exact fees and benefits as of June 2026. Both options sit on your existing Platinum account. You stay the primary cardholder, you are responsible for paying every charge, and all spending posts to your one account.

Key facts at a glance

Figures reflect Amex disclosures and widely cited reporting as of June 2026. The primary Platinum Card itself carries a $895 annual fee. Terms and conditions apply, and Amex can change these structures.

What the Companion Platinum Card is

The Companion Platinum Card is a free extra card you add for another person. It costs $0 to add. The companion gets a physical Platinum-branded card and can spend on your account.

The companion card does earn Membership Rewards into your shared pool. Per Amex's Companion Platinum guide, it earns 5X points on flights booked directly with airlines or through American Express Travel (on up to $500,000 per calendar year), 5X on prepaid hotels booked through AmexTravel.com, and 1X on everything else. That is the same earn structure as your main card.

The catch is benefits. A Companion Platinum Card on a consumer Platinum account does not get access to the American Express Global Lounge Collection. It also does not get the airline and hotel elite status perks. The companion can spend and earn points, but they cannot walk into a Centurion Lounge on their own card. If you want a full breakdown of what the main card unlocks, our guide to Amex Platinum benefits walks through every perk.

What an Additional Platinum (authorized user) is

The Additional Platinum Card is the paid upgrade. On a consumer Platinum account, each additional Platinum cardholder costs $195 per year. That is on top of your $895 primary annual fee.

For that $195, the authorized user gets the meaningful perks the companion misses. According to Amex's Additional Platinum guide and reporting from points-focused outlets, that includes access to the Global Lounge Collection (Centurion Lounges, Priority Pass upon enrollment, and partner lounges), plus the ability to mirror certain status benefits. They earn the same Membership Rewards rates into your shared pool.

So the only real reason to pay the $195 is lounge access and the premium travel perks. If your partner flies with you and you both want to use the lounge, the authorized user card is what unlocks that second entry. If you are still weighing whether a top-tier card earns its keep at all, our look at whether a premium annual fee is worth it can help you do the math.

Which one should you pick

The decision comes down to one question: does the other person need lounge access and travel status?

Choose the free Companion Platinum Card if your partner mostly wants a card to spend on, you want all spending to earn into one Membership Rewards pool, and they do not need to enter lounges on their own card. You pay nothing extra. This is the right call for couples where one person is the traveler and the other just needs a card for shared household spending.

Choose the paid Additional Platinum Card if your partner travels with you, wants to bring guests into lounges, or wants the elite hotel and airline status. At $195, it is far cheaper than a second $895 Platinum, and the lounge access alone can be worth it for frequent flyers. If you are comparing the Platinum against rival luxury cards before committing, our Chase Sapphire Reserve vs Amex Platinum showdown lines up the two heavyweights side by side.

A few people add multiple cards. You could give one person a paid Additional Platinum for lounge access and another person a free Companion card just to earn points. Amex allows a mix.

A note on credit building

The Amex Platinum and its companion cards are premium travel products, not credit-building tools. They are charge-style cards aimed at people who already have strong credit and pay in full. Adding an authorized user can help that person's credit if Amex reports the account to their bureaus and the account stays in good standing, but that is a side effect, not the point.

If the person you want to help is actually trying to build credit from a low or thin file, a premium card is the wrong tool. An unsecured starter card in their own name does more, because they own the account and the responsibility. If a fee-free Amex is what they really want, our roundup of no annual fee American Express cards is a better starting point. Aspire Mastercard is an unsecured option that reports to all three bureaus and works anywhere Mastercard is accepted, not just at one merchant, which makes it a sensible first card for someone building from scratch in their own name.

If the goal is spreading out a purchase while still building history, Perpay takes a different route, letting your partner build credit through a pay-over-time model that reports their activity, which fits someone who wants structured payments rather than a revolving balance.

Arro Card is another unsecured starter with no security deposit and no hard credit pull to see if you prequalify, with a limit that can grow over time, so it is a low-risk way for a thin-file partner to test their approval odds.

Any of those puts the account in the person's own name, which is what actually moves their score.

And before anyone applies for anything, it helps to know where their credit stands. A monitoring tool like Creditship lets you check your score so there are no surprises.

What users commonly report

People who have used both setups tend to say the free companion card is an easy win for couples who just want shared spending and points. The most common confusion is assuming the companion card includes lounge access, then being surprised at the airport when it does not. A frequent complaint is that the $195 authorized user fee feels steep once you realize you could have added a free companion card if you did not need the lounge. Several note that the paid authorized user card paid for itself quickly when both partners traveled and used Centurion Lounges. Always confirm the current fee and benefit split with Amex before adding anyone, since these structures change.

Frequently Asked Questions

Does the Amex Platinum companion card have an annual fee?

No. The Companion Platinum Card has a $0 fee to add on a consumer Platinum account as of June 2026. You only pay the $195 fee if you add an Additional Platinum Card, which is the authorized user version that includes lounge access.

Do companion cards get Amex lounge access?

No. A Companion Platinum Card on a consumer Platinum account does not get access to the American Express Global Lounge Collection. Only the paid Additional Platinum cardholder gets lounge access. This is the single biggest difference between the two.

Do both card types earn Membership Rewards points?

Yes. Both the companion card and the additional card earn Membership Rewards into the primary cardholder's shared points pool, at the same rates as the main card. The points are not split. They all go to one account.

Is the primary cardholder responsible for what the companion or authorized user spends?

Yes. In both setups, the primary Platinum cardholder is fully responsible for paying every charge made on the account. The companion or authorized user is not legally on the hook for the bill, which is why you should only add people you trust.