When it comes to tipping for a spa pedicure, the amount should reflect exceptional service. Consider factors like quality of service, additional services or perks offered by the spa, and your overall satisfaction with the experience. A good rule of thumb is to tip 15% to 20% of the total cost if you feel satisfied with the service provided. Ultimately, the decision on how much to tip depends on individual circumstances and personal comfort level with showing gratitude for excellent care received at a spa.