noun
Refers to the way a payment is made, such as cash, credit card, bank transfer, or digital payment.
このお店では、いろいろな決済方法が使えます。
You can use various payment methods at this store.
オンラインでの決済方法を確認してください。
Please check the online payment methods.
支払い方法 is a more general term for 'payment method' often used in everyday contexts, while 決済方法 is slightly more formal and commonly used in business or online transaction settings.
Compound of 決済 (けっさい, 'settlement of accounts') and 方法 (ほうほう, 'method'). The exact historical derivation is straightforward; the word is a modern compound used in financial and commercial contexts.