Steam payments can be declined for several reasons. The most common causes are: insufficient funds on your card, incorrect card details entered (card number, expiry date, or CVV), your bank blocking the transaction (some banks flag gaming purchases as suspicious), a region mismatch between your card and your Steam account country, or your Steam account being limited due to recent activity. To fix it: double-check your card details, contact your bank to authorize the transaction, or try a different payment method such as PayPal. The easiest alternative is to use a Steam Wallet code — no card needed, just redeem the code and use the balance to complete your purchase.
