Amex Platinum Extra Card: Free for Your Partner? All Benefits Explained

Last summer we were standing together at the gate at Brussels Airport. Flight BRU to BCN, a long weekend in Barcelona. I walked towards the lounge, Priority Pass in hand, and my girlfriend… stayed put. "Can I come along?" Honestly, I hadn't thought about that. My Amex Platinum gave me and one guest free access, so that time there was no problem. But it got me thinking.

Because what if we travel separately? Or if she goes on a trip with a friend? Then she's just standing in line at the gate, without a lounge, without Priority Pass, without that little luxury that makes travelling so much more enjoyable. And all while there was a simple solution I had overlooked for months: the Amex Platinum extra card.

I'm diving deep into it in this article. What exactly does the supplementary card cost, what benefits does your partner actually get, and when is it smarter to simply apply for a separate Platinum? As a Belgian traveller, you'll want to know this before you decide.

What exactly is the Amex Platinum extra card, and what does the supplementary card cost in Belgium?

Let me be clear about the terminology, because American Express doesn't always make it obvious on their website. With the Amex Platinum in Belgium you have two options to let your partner or family members enjoy the benefits.

The first option is an additional Platinum card. That's what I call the "Amex Platinum extra card" here. It costs €10 per month, so €120 per year. Your partner then gets their own Platinum card in their name, linked to your account. The second option: up to 4 free Green cards for other family members. Those cost literally nothing.

The difference? Enormous, actually. The Platinum supplementary card is almost a full-fledged Platinum experience. The Green supplementary card is mainly useful for earning points on daily spending, but misses the real premium benefits.

Let's do some concrete maths. The main card costs €65 per month, or €780 per year. Add the extra Platinum card for your partner, and you're at €75 per month total. €900 per year for two people who both have the full Platinum experience. Compare that to two separate Platinum cards: that would be €1,560 per year. So you save €660 per year by choosing the supplementary card.

What benefits does your partner get with the Amex Platinum supplementary card?

This is where it gets interesting, and honestly I was surprised myself by how extensive the benefits are. I had expected that a supplementary card at €10 per month would be some kind of light version. That's not the case.

The most important benefit: your partner gets their own Priority Pass Prestige. That's not derived access from your card, but a fully independent membership. Access to more than 1,550 airport lounges worldwide, including one free guest per visit. When you consider that a standalone Priority Pass Prestige membership costs around €500 per year, the supplementary card at €120 already pays for itself after the first lounge visit.

Concrete example from our own experience: my girlfriend flew to Lisbon alone in February for a long weekend with her sister. At Brussels Airport: lounge. On the return flight via the Tap Portugal hub: lounge. Those are two moments when she would normally have sat on a bench at the gate with an overpriced sandwich. Instead: a warm meal, free drinks, wifi, and quietly planning her next trip.

But it goes beyond lounges alone.

• Own travel insurance via Chubb and Europ Assistance: cancellation, medical expenses, luggage, flight insurance
• No foreign transaction fees on overseas payments, which is ideal for travel outside the eurozone
• Hertz Gold Plus Rewards Five Star status and Avis Preferred status in their own name
• Access to Amex Offers with discounts at more than 100 brands
• 24/7 concierge service
• Global Assist emergency assistance, anywhere in the world

And all the purchases your partner makes with the extra card? They earn Membership Rewards points that go to your main account. 1 point per €1, or 4 points per €1 if you activate the Booster option for €10 per month extra. Points that never expire as long as your card remains active.

Platinum supplementary card vs. free Green card: when do you choose which?

I struggled with this myself for a bit, so let me share my thought process. It entirely depends on how your partner travels.

My girlfriend flies about five to six times a year. Sometimes with me, sometimes alone, sometimes with friends. For her, that own lounge access is worth its weight in gold. She also needs her own travel insurance when she travels without me, because the insurance on my main card doesn't automatically cover her then. The Platinum supplementary card was a no-brainer for us.

But suppose your partner hardly ever flies. Perhaps twice a year on holiday, always together with you. Then the free Green supplementary card is actually sufficient. Your partner can then pay with Amex for daily groceries, petrol, online shopping. All points go to your account. And when you travel together, you cover the lounge access with your own Platinum (which includes 1 guest as standard).

The rule of thumb I use: does your partner regularly travel alone? Get the Platinum supplementary card. Do you always travel together? The free Green is usually enough.

There's another scenario I want to mention. If your partner has a personal income of at least €30,000 gross per year, you could consider each applying for your own Platinum. The advantage is significant: your partner then receives their own welcome bonus. Via the TravelLux.be referral link, that can yield up to 150,000 Membership Rewards points. Those are points with which you can easily book a return in business class with Brussels Airlines, Lufthansa, or even Emirates or Qatar Airways.

Brussels Airport benefits: what works for two cardholders?

I have to be honest, the Brussels Airport benefits are one of the reasons I'm so enthusiastic about the Amex Platinum in Belgium. And those benefits become even stronger when your partner also has a Platinum card.

The Fast Lane security at Brussels Airport is one of them. Normally that costs €169 per year if you buy it separately. With your Amex Platinum you get it for free. And yes, the additional Platinum cardholder also gets that Fast Lane. Two times no queuing at security at Zaventem. Especially in the summer months, when the lines sometimes stretch outside the building, that's worth every penny.

Then there's the Dining Experience at Black Pearls restaurant. Twice a month you can pick up a meal as a cardholder. With two Platinum cards in the household, that becomes four times a month. We regularly pick up our dinner there when we get home late from work and don't feel like cooking. It feels a bit like a hidden benefit that few people talk about.

And the Lounge On the Go: twice a month premium takeaway. Here too, each cardholder has their own allowance. My girlfriend regularly picks up a coffee and breakfast there when she's at the airport early for a flight.

Don't forget the Dining for 2 either. Three times a year you can enjoy a free two-course menu for two at selected top restaurants in Belgium. Value: up to €300 per year. If both partners have a Platinum, that doubles to six times a year. That's six date nights where you only pay for the drinks.

Fine Hotels + Resorts and earning points as a couple

This is where it gets really fun for Belgian couples who love luxury hotels. The Fine Hotels + Resorts programme gives you access to more than 14,000 luxury hotels worldwide with benefits you can't get anywhere else.

Per stay you receive: free room upgrade when available, early check-in, late check-out, daily breakfast for two, and a welcome gift worth around €100. The total added value per stay can reach up to €650. Last year we booked two nights at a resort on Santorini via FHR and received an upgrade to a suite with a private pool. The breakfast alone was worth €45 per person per day. That €90 per day saving on breakfast times two nights: €180 saved, without us having to do anything.

But the real power lies in earning points as a couple. If your partner has a supplementary card and you use it for all daily spending, you earn significantly faster as a household. Suppose you spend €4,000 per month combined via the Amex: that's 4,000 points per month, or 48,000 per year. With the Booster option (€10/month extra) that becomes 192,000 points per year. Enough for multiple business class flights.

We usually transfer our points to Brussels Airlines or to the Miles & More programme from Lufthansa. A return BRU to New York in business class costs around 112,000 miles. With two active cards and a normal spending pattern, you reach that in a year and a half. And don't forget: if you applied for your Platinum via our referral link, you start with a welcome bonus of up to 150,000 points. That's already more than enough for that first business class flight.

Other transfer partners we regularly use: Emirates Skywards (BRU via DXB to the Maldives in business class), Qatar Airways Privilege Club (via Doha to Asia), and British Airways Avios for short flights within Europe. The flexibility is enormous.

My honest opinion: is the Amex Platinum extra card worth it?

I'm not going to pretend that €120 per year is nothing. It's money. But let me lay out the calculation that convinced me.

Priority Pass Prestige alone: value €500 per year. Fast Lane Brussels Airport: value €169. The travel insurance when your partner travels alone: try getting that separately for €120 per year with the same coverage. You can't. Add the Amex Offers, the car rental status, and the points on spending on top of that, and you're well above €1,000 in value for €120 per year.

Of course, your partner also needs to actually use those benefits. If she never flies, never travels alone, and has no interest in lounges: save that €10 per month and go for the free Green supplementary card.

But if you both love travelling? If your partner occasionally flies solo, or you sometimes have to go through security separately at busy airports? Then that additional Platinum card is honestly a bargain.

What I also appreciate: you're not locked in. You can cancel the extra card at any time if it doesn't suit you. No long-term contract, no cancellation fees.

How do you apply for the Amex Platinum (and the extra card) in Belgium?

The application process is fairly straightforward. You need a minimum gross annual income of €30,000, you must be at least 18 years old, and have a Belgian tax residence. No payment arrears, and you must agree to a SEPA direct debit.

Once approved, you can request an additional Platinum card for your partner directly via your online Amex account. That takes a few minutes. The supplementary card is sent separately to the same address.

One important thing: the welcome bonus. It only applies to the main cardholder, not to the extra card. That's why it's smart to grab the maximum bonus when applying for your Platinum. Directly via the Amex website you get a standard bonus. Via the TravelLux.be referral link you receive the maximum welcome bonus of up to 150,000 Membership Rewards points. That difference can be worth thousands of euros in flights and hotel stays.

Frequently asked questions about the Amex Platinum extra card in Belgium

Updated on 8 April 2026. This article contains affiliate links. TravelLux.be receives a commission upon application via the referral link, at no extra cost to you. All mentioned benefits and rates are based on official information from American Express Belgium and are subject to change.