Adding an authorized user to the American Express Platinum can be a strong premium-card decision, provided the person you're adding will actually use airport lounges. Amex offers two kinds of authorized-user card on the consumer Platinum, and they're very different products. An Additional Platinum Card costs $195 a year per card and carries lounge access. A Companion Platinum Card has no annual fee and carries no lounge access. The trickier questions are which benefits each card actually gets, which ones stay locked to the primary account, and how to avoid burning the same statement credit twice across a household.
This guide answers all of that for October 2026 pricing, with the primary annual fee at $895. The two card types are where most households go wrong; the credit allocation logic is a close second.
The Pricing Structure (As of October 2026)
The fee structure is the part most readers come here for, so it goes first.
- Additional Platinum Card: $195 per card, per year. Two Additional cards cost $195 each, not $195 between them.
- Companion Platinum Card: no annual fee.
- Limit: up to 10 active Additional Card Members on one account.
- Business Platinum: Different product, different fee structure. This guide covers the consumer Platinum only.
Both cards carry the authorized user's name. Every charge appears on the primary cardholder's statement, and the primary is responsible for paying all of it. The difference is what each card unlocks, and that difference decides whether the $195 is worth paying.
What Each Additional Platinum Card Actually Gets
Here is where the math can look favorable. The benefits an Additional Platinum Card Member gets are the ones that can pay for the fee if they're used.
Lounge Access (Inherited in Full)
Each Additional Platinum Card Member gets:
- American Express Centurion Lounges, unlimited, when they arrive within 3 hours of their departing flight. Guests cost $50 each ($30 for children 2 through 17).
- Priority Pass membership in the cardholder's own name (enrollment required), with up to two guests free at Priority Pass lounges that admit guests.
- Delta Sky Club access on same-day Delta flights: 10 Visits per eligible card each year, issued when the account opens and again each February 1. Basic Economy tickets don't qualify, and access becomes unlimited after $75,000 in eligible purchases on the account in a calendar year.
- Sidecar by The Centurion Lounge, Escape Lounges and Plaza Premium lounges through the Global Lounge Collection.
Amex puts the Global Lounge Collection at "over $850 of annual value." That's Amex's own figure, and it's why an Additional card for a spouse or adult child is worth a look if they fly more than three or four times a year.
Hotel and Travel Elite Status
Each Additional Platinum Card Member can get:
- Hilton Honors Gold status (enrollment required).
- Marriott Bonvoy Gold Elite status (enrollment required).
- Car rental status with Avis, Hertz and National.
- Fine Hotels + Resorts booking eligibility (the $600 hotel credit itself is shared at the account level; see below).
Hilton Gold and Bonvoy Gold are the workhorses here. If the Additional cardholder books their own hotel stays, they show up at check-in with their own Gold status, which matters for any household that stays at branded hotels a few times a year.
TSA PreCheck or Global Entry Credit
The Basic Card Member gets a statement credit every 4 years: $120 toward Global Entry or up to $85 toward TSA PreCheck, for the first of the two programs applied for and paid for with the Basic Card or an eligible Additional Card. NEXUS doesn't qualify.
Membership Rewards Earning
Every charge on an authorized-user card earns Membership Rewards at the same rates the primary card earns: 5x on flights booked directly with airlines or through Amex Travel (up to $500,000 per calendar year), 5x on prepaid hotels through Amex Travel, and 1x on most other purchases. The points all flow into the primary cardholder's account. There is no per-cardholder split.
This matters for the welcome offer and for ongoing earning. If you and an authorized user are running $4,000 a month of household spend through the account, all of those points pool into one Membership Rewards balance, which is generally what you want for transfer-partner redemptions where minimum transfer increments matter.
What a Companion Platinum Card Gets (and Doesn't)
A Companion Platinum Card costs nothing, and it shows. Amex's terms exclude Companion cards from the Centurion Lounge, Sidecar, Priority Pass, Delta Sky Club, Escape and Plaza Premium lounges and the Global Lounge Collection's partner lounges. They also exclude Companion cards from Fine Hotels + Resorts bookings and car rental status.
What a Companion card does get: its charges earn points for the account, and a Companion cardholder can book The Hotel Collection through Amex Travel, with those prepaid bookings counting toward the account's hotel credit. It's the right card for someone who needs to spend on the account but won't use the lounges.
What Stays With the Primary Account
This section applies to both card types.
The Welcome Offer
Only the primary cardholder receives the welcome offer. Purchases on authorized-user cards count toward the spending requirement, which is useful when the offer asks for $12,000 in purchases within the first 6 months and the primary isn't going to spend that alone, but the points themselves deposit into the primary's account.
The $200 Annual Airline Fee Credit
This is one credit, capped at $200 per calendar year, attached to a single airline you select. An authorized user can trigger it (incidental fees on the selected airline charged to any card on the account count), but the household has $200 to spread, not $200 per card. Pick an airline the household actually uses and assign the credit to whichever family member is most likely to incur a baggage fee or seat-selection charge that year.
The $600 Hotel Credit
Same deal: up to $300 from January to June and up to $300 from July to December, capped at $600 a calendar year for the whole account. It applies to prepaid Fine Hotels + Resorts or The Hotel Collection bookings through Amex Travel. Additional Platinum Card Members can use it on either program; Companion cardholders can use it only on The Hotel Collection.
The Uber Cash
This is the one that confuses households most. The Uber Cash ($15 a month plus a $20 bonus in December) goes to the primary cardholder, and an eligible card receives it in only one Uber account. If the same card is added to more than one Uber account, only the first one gets the Uber Cash, so add the primary's card to the Uber account of whoever uses Uber more. The Uber Cash also expires at the end of each month, which is a nudge to use it rather than hoard it.
The $189 CLEAR Plus Credit
This one is genuinely per-cardholder. Each Companion can enroll in their own CLEAR Plus membership and trigger their own up-to-$189 credit on their own card. Do not assume it is one credit per account; it is one credit per enrolled cardholder. Two Companions plus the primary equals three potential CLEAR enrollments, and CLEAR Plus retails at $189 a year.
The $300 Equinox Credit
The credit is $300 per calendar year across all cards on the account, and it needs enrollment. Most households can't use this credit at all unless the primary or an authorized user lives near an Equinox and was already going to pay for membership. If you don't, ignore the credit and don't factor it into the worth-it math.
The Other Monthly and Quarterly Credits
All account-wide, and most need enrollment. The $155 Walmart+ credit covers one monthly Walmart+ membership fee (up to $12.95 plus tax) a month. The $300 digital entertainment credit pays up to $25 a month on services such as Disney+, Hulu, Peacock and YouTube. The $400 Resy credit pays up to $100 a quarter and the $300 lululemon credit up to $75 a quarter. Purchases on authorized-user cards count, but there is still only one credit per period for the whole account.
The Real Math: When Adding an Additional Card Pays Off
Kay's framing here is the same one she'd apply to any "is this worth it" question on a credit card. Net out the fee against the benefits the authorized users will actually use, then check whether the net is positive or negative.
Two Additional Cards, Travel-Active Household
Say you add two Additional Platinum Cards for two adults who fly several times a year.
- Fees: $195 per card, so $390 a year for the pair.
- Priority Pass x 2: each cardholder gets their own enrollment, with two free guests where the lounge allows them.
- Hilton Gold x 2 and Bonvoy Gold x 2: Hard to price exactly, but real for anyone who stays at branded hotels on their own bookings.
- Centurion Lounge x 2: Each cardholder can independently enter Centurion lounges. Skip Priority Pass when a Centurion is on-airport.
- Delta Sky Club x 2: 10 Visits per card each year on same-day Delta flights.
- CLEAR Plus x 2: $378 in covered enrollment if both Companions enroll.
The question for each card is simple: will this person get more than $195 a year out of the lounges and status? For two frequent flyers, the answer is usually yes.
One Additional Card, Light-Travel Household
- Fee: $195.
- Priority Pass: worth little if the cardholder only travels twice a year.
- Hilton Gold and Bonvoy Gold: Modest if the cardholder stays at branded hotels at all.
- Centurion access: Marginal if the cardholder only flies twice.
- CLEAR Plus: $189 if the Companion enrolls.
Positive but thin. Worth doing if the cardholder will use lounges at all; close to a wash if they fly once a year. For a light traveler who mostly needs to spend on the account, the free Companion card is the better choice.
Three or More Authorized Users, Mixed Household
There's no group discount: each Additional Platinum Card costs $195. Pay for Additional cards only for the adults who fly, and give everyone else a free Companion card if they need one. Don't pay $195 for a card whose lounge access will go unused.
Who You Should Add (and Who You Shouldn't)
Kay rule: every recommendation specifies who it's for.
Add an Additional Platinum Card if they:
- Travel three or more times a year and would otherwise be without lounge access.
- Stay at Hilton or Marriott properties at least twice a year.
- Are responsible with the spending account (the primary owes 100% of the debt).
- Live in a household that pools travel rewards rather than running parallel award accounts.
Skip the Additional card if they:
- Already carry their own Amex Platinum or another premium card with lounge access (no need to duplicate Priority Pass).
- Have spending control concerns. The primary cardholder absorbs every charge.
- Want their own welcome bonus on a different premium card. Adding them as an authorized user does not block them from applying for their own product, but it also doesn't give them the welcome offer they might get on their own application.
For the third case, the better play is often to put the partner on their own Amex Gold or have them apply for the Platinum directly, pocket the welcome offer, and accept the second $895 annual fee. Two primary Platinums can out-earn one Platinum plus one Additional card on welcome-offer value alone, then run roughly even on ongoing benefits. The wallet-strategy answer depends on how many premium cards the household can absorb without wasting overlapping credits.
Additional Platinum vs. Primary Platinum: The Decision Tree
Most households reach this question after the primary cardholder has had the Platinum for a year or two and the second adult is starting to travel more. The clean way to think about it:
- One traveler, one casual traveler: Additional Platinum Card. The casual traveler benefits enough from lounge access and elite status to justify $195, and the household doesn't need a second $895 annual fee.
- One traveler, one spender who doesn't fly: Companion Platinum Card. No fee, and the points still pool.
- Two heavy travelers, both will use credits: Two primary Platinums. Each gets their own welcome offer, their own Uber Cash, their own digital credits. The household pays two $895 annual fees instead of $895 plus $195 for one Additional card, but a second welcome offer can help cover the difference in year one. Amex's offer is as high as 175,000 points after $12,000 in purchases within the first 6 months; it's personalized, so yours may be lower or none.
- Two heavy travelers, one wants more flexibility on points: Primary Platinum plus a Sapphire Reserve or Venture X. Different ecosystems, different transfer partners, more flexibility at higher total annual fee.
Compare these scenarios honestly against the household's actual travel pattern before committing. The Additional card is not the cheapest answer in every case; it's the cheapest answer when one adult drives most of the points-earning and the other adult just wants the travel perks.
How to Add (and Remove) an Authorized User
The process is a five-minute task, online or by phone.
To add:
- Log into americanexpress.com under the primary cardholder's account.
- Go to Account Services, then Add an Additional Card Member, and choose an Additional Platinum Card or a Companion Platinum Card.
- Enter the authorized user's full legal name and the other details Amex asks for.
- Confirm the address where the physical card should ship.
- Submit.
To remove:
- Same path: Account Services, then Manage Additional Card Members.
- Select the cardholder and choose Remove.
- For a clean removal, cut up the physical card.
A removed authorized user's history stays on their credit file for the period the account was open. Removing them does not erase the tradeline. If the primary's payment history is clean, that tradeline is a long-term credit-building gift; if there are missed payments on file, removal protects the authorized user going forward but doesn't undo prior reporting.
Comparing the Platinum Setup to Other Premium-Card AU Structures
Quick context for the wallet-strategy reader who is comparing across issuers.
- Chase Sapphire Reserve: Authorized users are typically $75 per card. Reserve AUs get Priority Pass Select with their own enrollment, but no Centurion equivalent.
- Capital One Venture X: Authorized users are free. AUs get the Priority Pass and lounge benefits at no additional cost. This is the most aggressively priced AU structure in the premium card market.
- Citi Strata Elite: AUs are $75 per card. Lounge access through American Airlines Admirals Club follows the AU.
At $195 per Additional card, the Amex Platinum isn't the cheapest way to give an authorized user lounge access, but the Centurion Lounge network is unique to Amex and is the lever that can swing the comparison back. If your household flies through airports with Centurion lounges, the Amex Platinum AU structure delivers a benefit no other premium card matches. If you don't fly through Centurion airports, the Venture X authorized-user setup is genuinely a better value for households where the second cardholder is a light traveler.
This is the wallet-strategy framing the article exists to deliver: the Additional Platinum Card is right for households that want premium lounge density. The Venture X free AU is right for households that want maximum cost efficiency. Both are correct answers to different questions.
Common Mistakes to Avoid
Three patterns that cost households real money on this setup.
Mistake one: Paying for an Additional card for someone who won't use lounge access. The $195 fee math depends almost entirely on lounge value. If the cardholder never goes to airports, $195 buys you Hilton and Marriott Gold and not much else. Give them a free Companion card instead, or no card at all.
Mistake two: Burning the airline credit twice. Households add an authorized user, the authorized user books a ticket on Delta, the primary also books on Delta, both add seats or bags expecting the credit to clear. Only $200 actually clears for the whole account. Coordinate the credit usage at the start of the year. Pick which adult uses Delta primarily, and route bag fees and seat charges through that adult.
Mistake three: Forgetting that every authorized-user charge shows on the primary's statement. Every charge is the primary cardholder's responsibility. The primary sees the line items, owes the balance, and absorbs the late fees if a payment slips. This is not a problem for spouses with shared finances. It is a real problem for adult children who don't yet have an income, or for friends and partners where the financial relationship is unclear. Have the conversation about who pays which charges before the second card lands in the mailbox.
For more on the broader case for this card, see our full breakdown of the Amex Platinum's benefits. And if a household is weighing the Amex Green or Amex Gold instead of the Platinum entirely, the cost-per-cardholder math runs very differently on those products.
Bottom Line
An Additional Platinum Card is a clear "yes" for a household with a second frequent flyer. At $195 a card, it gives that person their own Centurion, Priority Pass and Delta Sky Club access and the option to enroll in Hilton and Marriott Gold. A Companion Platinum Card is free but leaves out the lounges and Fine Hotels + Resorts, so it suits someone who only needs to spend on the account. Either way, the Membership Rewards earning pools into one balance, which is generally what households want.
The two reasons not to pay for an Additional card are simple: the second cardholder doesn't travel enough to use the lounges, or the second cardholder would benefit more from their own primary Platinum welcome offer. Outside those two cases, $195 buys a year of premium-travel benefits for an additional adult. Apply for the Platinum directly through our link if you're starting fresh, and add authorized users at month one if the second cardholder is travel-active. Don't wait until renewal to make the call.
Updated October 4, 2026: Amex Platinum.
