Yes, Carnival Cruise Line typically charges a "single supplement" in 2026, which is essentially a surcharge for solo travelers occupying a cabin designed for two. Because cruise pricing is traditionally based on double occupancy, a solo guest is often required to pay 200% of the per-person fare (effectively paying for the "empty" second spot) to cover the lost revenue the cruise line would otherwise make from that second person’s onboard spending. However, there are exceptions: Carnival occasionally offers "Solo Specials" during off-peak seasons where the supplement is reduced to 125% or 150%. Additionally, for those seeking a social experience without the full cost, specialized agencies like SinglesCruise host group events on Carnival ships, often facilitating "roommate matching" to help guests avoid the supplement entirely by sharing a cabin.