Is an Amex Platinum Authorized User Worth the Additional Cost?

An additional card should be evaluated separately from the primary account. Confirm the current additional-card price and exactly which benefits apply to that cardholder; access and credits are not necessarily duplicated.

Count incremental value only

Do not count a household benefit twice. Value access only when the added cardholder will use it independently and when an existing alternative would otherwise cost money.

Check responsibility and privacy

The primary cardmember remains responsible for charges. Set clear spending expectations and use issuer controls where available. Never enter a card number or another person’s private financial data into a calculator.

Enter the additional cost and incremental value in the Annual Fee Calculator, then confirm current authorized-user terms on the Amex Platinum card profile.