If past card revamps are any indication, the annual fees on Amex Platinum and Business Platinum will almost certainly see increases as part of the planned changes. But just how high could they go?

The price jump is part of an ongoing shift for credit card companies and airlines toward premium rewards and high-end travelers.

The annual fee for the Sapphire card will jump 45% to $795. Amex did not say if there would be a fee increase.