This depends on your lifestyle and preference. The faster your nails grow and the more abuse they withstand, the more often you'll need professional maintenance. If you prefer absolutely perfect polish and medium to long nails, you'll need a professional manicure once a week. If you favor shorter nails for a more active lifestyle, and you can do polish touch-ups at home, you may need a professional manicure only every two weeks. For long-lasting polish, apply a protective topcoat every two to three days.