Amex boosts supplementary card bonuses
American Express has increased bonus points for adding a first supplementary card to several cards, including Gold and Platinum, until October 31st.

American Express has reintroduced enhanced bonuses for adding a first supplementary cardholder to several of its credit cards. The offer applies to the American Express Preferred Rewards Gold Credit Card, The Platinum Card, and three additional cards, and runs until 31st October.
Cardholders who have never issued a supplementary card on these accounts can now earn significantly more points for doing so. The first supplementary card is free, and there is no spending requirement on the new card to qualify for the bonus.
Enhanced bonus point offers
The bonuses for several core cards have been increased for this limited-time promotion. The offer is only valid for the first supplementary card added to an account; existing supplementary cardholders will not receive the bonus if they add another.
| Card | Bonus Points | Point Type |
|---|---|---|
| American Express Preferred Rewards Gold Credit Card | 9,000 | Membership Rewards |
| The Platinum Card | 12,000 | Membership Rewards |
| Marriott Bonvoy American Express Credit Card | 6,000 | Marriott Bonvoy |
| Nectar Credit Card | 6,000 | Nectar |
| The American Express Rewards Credit Card | 5,000 | Membership Rewards |
According to the source, the Gold card bonus is tripled, while the Platinum card bonus is increased from 5,000 to 12,000 points. The bonuses for the Marriott Bonvoy, Nectar, and Rewards cards are described as doubled or more than doubled.
Other card bonuses and cashback
Separate supplementary card incentives are also available for other American Express products. The source notes a special offer of £25 cashback for adding a supplementary card to either of the two American Express Cashback cards.
Furthermore, standard bonuses are available for first supplementary cards on other key cards when applying via a specific link on the American Express website.
| Card | Standard Bonus | Point Type |
|---|---|---|
| British Airways American Express Premium Plus Card | 5,000 | Avios |
| British Airways American Express Credit Card | 1,000 | Avios |
| The Harrods American Express Card | 1,000 | Harrods Rewards points |
Important application details
The promotion is time-limited. Head for Points states that "the special offer on supplementary cards for the American Express cards listed above runs to 31st October."
Applicants are strongly advised to use a specific page on the American Express website to add their supplementary card. The source warns that "it isn’t certain that applications made via other routes will track" and that using any other page may result in the bonus not being awarded.
For eligible cardholders who have never added a supplementary user, this represents a simple way to earn a large points bonus. The report concludes by noting the offer was flagged by an individual named Joe.





