How many Singapore dollars you change before your trip largely depends on where you plan to go. Most major tourist attractions and shops in shopping malls will accept credit cards, and other cashless options like contactless payments and smart wallets are also common.

Those planning to take public transport in Singapore can use their credit cards on the public buses and MRT card readers for convenience, but purchasing a local EZ-Link card or transport pass may be more worthwhile depending on how much travel you plan to do. However, do carry some cash around with you as it remains the prevalent method of payment for most small businesses, eating at hawker center stalls, or taking a taxi. Try to break notes of larger denominations ($50/$100) into smaller ones ($2/$5/$10) when possible.