First Deposit With American Express
For a first deposit via American Express, a practical starting point is $50–$100. That amount clears most minimum deposit rules (often $10–$20) and gives enough balance to test withdrawals and game limits without locking up a large sum. Expect the cashier to show the deposit in the account within minutes, but the bank side can post it as a card purchase, so keep an eye on the final billed amount and currency conversion if the casino account runs in a different currency.
Bonus activation depends on how the cashier is set up: some sites apply the welcome bonus automatically after the first successful deposit, while others require a promo code or a manual toggle in the bonus section before you pay. Check three items before confirming: whether American Express deposits qualify for the welcome bonus, whether there’s a maximum bonus cap tied to the deposit size (for example, depositing above the cap doesn’t increase the bonus), and whether the casino flags the payment as “card” (not “e-wallet”) for wagering rules. If the cashier adds a card fee or the bonus excludes certain games (common for some table games), the deposit that looked optimal on paper stops being optimal in practice.