Amex Platinum Supplementary Card in Germany: What Your Partner Actually Gets and What Stays With the Main Account

The Platinum supplementary card is often sold as a "second Platinum." That is only half true. Some benefits really do attach to the card in your partner's hand: lounge access, insurance, hotel status. The rest attach to the card account, and there is exactly one of those. Travel credit, restaurant credit, SIXT ride, Lodenfrey: all counted per account, not per card.

Getting this right saves you two disappointments: a partner who expects their own travel credit and finds none, and skipping the card because "the benefits are shared anyway" while giving up a second Priority Pass and a second insurance policy.

What the supplementary card is and what it costs

A supplementary card runs on the main cardholder's account. It has its own card number, works in Apple Pay on the supplementary cardholder's device, and can be managed through a separate online login. Everything is billed on one statement, and the main cardholder is liable for it: whatever your partner spends is legally your debt to Amex.

The German Platinum Card offers two kinds of supplementary cards:

• Platinum supplementary card: carries its own annual fee. Our Gold vs. Platinum comparison lists it at 150 euros per year; check the current fee schedule before applying, because Amex adjusts fees without much announcement.
• Gold supplementary card: no annual fee of its own, but without the Platinum travel benefits.

The supplementary cardholder has to be an adult but does not have to live in the same household. There is no separate credit check like a main card application, because liability stays with you.

What the supplementary card carries on its own

This is the part that has to justify the fee. All of the following attach to the card itself, not the account.

Lounge access. The Platinum supplementary cardholder receives their own Priority Pass membership, not shared use of yours. With one card, you enter plus one guest. With two cards, each of you enters plus a guest, so four people. And when your partner flies alone, they get in without you. The same applies to the Centurion Lounges, where the supplementary card counts as a Platinum in its own right.

What no longer comes with either card: the Lufthansa lounges. Amex ended that partnership on October 1, 2026. If you ordered the supplementary card mainly for the Senator Lounge in Frankfurt or Munich, redo the math.

Insurance. The Platinum insurance package treats the supplementary cardholder as an insured person in their own right. Trip cancellation, overseas medical, rental car collision coverage, baggage delay: the terms generally tie coverage to paying for the trip or rental with a card on the account. If your partner pays for their own flight with the supplementary card, they are covered, even without you on the booking.

That is more than it sounds. Without a supplementary card, your partner is only co-insured when they are on the same booking as you. Traveling alone, for work, or with friends, they fall outside the coverage. If that happens regularly, the supplementary card is essentially an annual travel insurance policy with rental car coverage. Read the current terms before you need them; they define who counts as insured, and the claims process is the same.

Hotel status. According to Amex's terms, status enrollment (Hilton Honors Gold, Marriott Bonvoy Gold, and the other programs) is also available to Platinum supplementary cards. Your partner enrolls with their own card number and loyalty account and gets the status in their name, so breakfast and upgrades apply when they check in without you. What each status is worth day to day is covered in the overview of hotel status through credit cards. Whether a specific status is currently offered for the supplementary card shows in the online account under that card's benefits; the list has changed several times.

Platinum Service. The supplementary cardholder can book and rebook on their own, including at Fine Hotels and Resorts.

Amex Offers. Offers are served per card. With their own login, the supplementary cardholder activates their own offers, so a household can sometimes take a promotion twice.

What stays with the main account

Now the other column. Everything Amex calls a credit is tied to the account. There is no second pot for the supplementary card.

• Travel credit: once per account per year, no matter how many cards run on it.
• Restaurant credit, SIXT ride, Lodenfrey: also per account. Supplementary card spending counts toward redemption, but the credit is not doubled.
• Lounge On The Go: main and supplementary card draw from one shared pot, as Amex states explicitly. A couple halves the reach.
• Membership Rewards: All points, including supplementary card spending, land in the main cardholder's account. The supplementary cardholder can neither see nor redeem them. For the household that is an advantage, because points in one account pool more easily into a business class ticket. For your partner, it means no points of their own.
• Welcome bonus: There is none for the supplementary card. The upside: someone who was only a supplementary cardholder does not count as a previous cardholder and can later apply for a main card of their own with a bonus.

Easy to miss: the supplementary card ends with the main card. If you cancel the Platinum, you also cancel your partner's Priority Pass, insurance, and status, on the same notice period.

How to count the credits

For the decision of whether to add a supplementary card, the credits play no role, because the second card does not change them. What counts is only the column of standalone benefits against the annual fee.

A conservative approach: how often per year is your partner at an airport without you, and would they pay for a lounge there? How often do they rent a car or book a trip you are not on? How many hotel nights do they spend alone? Each of these is a case where the supplementary card delivers something the main card cannot. If none occur, the only remaining value is entering the lounge together, each with a guest.

When the Gold supplementary card is the better choice

The free Gold supplementary card is not a stripped-down Platinum but a different product on the same account. No Priority Pass, no Centurion Lounge access, no Platinum insurance package. What it does bring: spending onto your Membership Rewards account, its own Amex Offers, and shared expenses on one statement.

It is the right choice if your partner rarely travels alone and your main goal is to route household spending into one points account. You save the fee and lose practically nothing: on shared trips your partner is co-insured through your booking and enters the lounge as your guest.

The Platinum supplementary card is the right choice when separate trips happen. From a handful of solo trips per year with a lounge, a rental car, or a hotel, it overtakes the free version, because coverage and access that would not otherwise exist actually get used.

Verdict

The Platinum supplementary card is a genuine second Platinum for everything that attaches to the person: its own Priority Pass, its own insurance coverage, its own hotel status, its own line to Platinum Service. It is not a second Platinum for anything that attaches to the account: credits come once, points land with you, and there is no bonus.

So evaluate it through your partner's solo trips, not through the credits. If they regularly travel without you, the fee is inexpensive travel insurance with lounge access on top. If you almost only travel together, take the free Gold supplementary card. Whether the main card itself is still worth its price is a separate question, and one to ask again now that the Lufthansa lounges are gone.