In 2026, you do not strictly need Canadian cash to enjoy the Canadian side of Niagara Falls, but it is highly recommended for a seamless experience. The vast majority of hotels, major attractions (like Journey Behind the Falls), and restaurants accept all major international credit and debit cards (Visa, Mastercard, Amex). In fact, many vendors in 2026 are "tap-to-pay" only. However, if you plan on using public transit (WEGO buses), buying small souvenirs from street vendors, or tipping tour guides, having some Canadian dollars (CAD) is beneficial. Be aware that while some shops on the Canadian side will accept U.S. Dollars (USD) as a courtesy, they often give a very poor exchange rate and will provide your change in Canadian coins. To get the best value in 2026, use a credit card with "no foreign transaction fees" for all major purchases and withdraw a small amount of CAD (perhaps $50) from a local bank ATM to cover "just in case" scenarios and small-scale tipping.