Visa and Mastercard remain the most universally accepted payment methods at online casinos. Nearly every licensed casino accepts these cards for deposits, and many support card withdrawals as well.
Credit card deposits are instant, while withdrawals typically take 1-5 business days. Some banks may block gambling transactions, so check with your card issuer if you encounter issues.
Note that in some jurisdictions (like the UK), credit card gambling is prohibited. In these cases, you can still use debit cards or switch to an alternative payment method.