Monaco is the world's most expensive city-state, and your 2026 budget depends on your lifestyle. A budget day-tripper coming from Nice should bring at least €100–€150 to cover a round-trip train ticket (€9), a casual lunch (€20), and entry to one major attraction like the Oceanographic Museum (€19) or the Prince's Palace (€10). For a mid-range experience with an overnight stay, expect to spend €400–€600 per day, as three-star hotels start around €250 and a nice dinner with wine averages €100. Luxury travelers should budget at least €1,500+ daily, with five-star icons like the Hotel de Paris costing €800+ and Michelin-starred tasting menus reaching €450. If you plan to gamble at the Monte-Carlo Casino, remember there is a €17 entry fee just for the gaming rooms, plus whatever bankroll you choose to bring. During the Grand Prix in May, all prices quadruple, and even a simple sandwich can become a significant expense, so advanced financial planning is essential for that specific week.